Version 0.3.0

* Refactor notifications
* Change grade notify icon

.circleci/config.yml

@@ -7,7 +7,7 @@ references:
 
   container_config: &container_config
     docker:
-      - image: circleci/android:api-27-alpha
+      - image: circleci/android:api-26-alpha
     working_directory: *workspace_root
     environment:
       environment:
@@ -126,6 +126,9 @@ jobs:
           name: Launch emulator
           command: export LD_LIBRARY_PATH=${ANDROID_HOME}/emulator/lib64:${ANDROID_HOME}/emulator/lib64/qt/lib && emulator64-arm -avd test -noaudio -no-boot-anim -no-window -accel on
           background: true
+      - run:
+          name: Change circle-android script file permissions
+          command: sudo chmod +rx /bin/circle-android
       - run:
           name: Wait emulator
           command: |

.gitignore

@@ -32,6 +32,8 @@ local.properties
 .idea/tasks.xml
 .idea/vcs.xml
 .idea/workspace.xml
+.idea/caches/
+.idea/codeStyles/
 *.iml
 
 # OS-specific files

.gitlab-ci.yml

@@ -12,7 +12,7 @@ build:
   script:
     - ./gradlew --no-daemon --stacktrace dependencies || true
     - ./gradlew --no-daemon --stacktrace assembleDebug
-    - mv app/build/outputs/apk/app-debug.apk .
+    - mv app/build/outputs/apk/debug/app-debug.apk .
   artifacts:
     name: "${CI_PROJECT_NAME}_${CI_BUILD_REF_NAME}-${CI_BUILD_ID}"
     paths:
@@ -26,7 +26,7 @@ tests:
      - .gradle
     policy: pull
   script:
-    - ./gradlew --no-daemon --stacktrace test
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesRelease test
   artifacts:
     paths:
     - app/build/reports/tests
@@ -39,7 +39,7 @@ lint:
      - .gradle
     policy: pull
   script:
-    - ./gradlew --no-daemon --stacktrace lint
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesRelease lint
   artifacts:
     paths:
     - app/build/reports

README.md

@@ -1,12 +1,13 @@
 # Wulkanowy
 
-[![Codecov](https://img.shields.io/codecov/c/github/wulkanowy/wulkanowy.svg?style=flat-square)](https://codecov.io/gh/wulkanowy/wulkanowy)
+[![CircleCI](https://img.shields.io/circleci/project/github/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://circleci.com/gh/wulkanowy/wulkanowy)
-[![Dependency Status](https://www.versioneye.com/user/projects/5969ff0b0fb24f004f8c711b/badge.svg?style=flat-square)](https://www.versioneye.com/user/projects/5969ff0b0fb24f004f8c711b)
-[![CircleCI](https://img.shields.io/circleci/project/github/wulkanowy/wulkanowy.svg?style=flat-square)](https://circleci.com/gh/wulkanowy/wulkanowy)
 [![Bitrise](https://img.shields.io/bitrise/daeff1893f3c8128/master.svg?token=Hjm1ACamk86JDeVVJHOeqQ&style=flat-square)](https://www.bitrise.io/app/daeff1893f3c8128)
+[![Codecov](https://img.shields.io/codecov/c/github/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://codecov.io/gh/wulkanowy/wulkanowy)
 [![BCH compliance](https://bettercodehub.com/edge/badge/wulkanowy/wulkanowy?branch=master)](https://bettercodehub.com/)
+[![Scrutinizer](https://img.shields.io/scrutinizer/g/wulkanowy/wulkanowy.svg)](https://scrutinizer-ci.com/g/wulkanowy/wulkanowy/?branch=master)
+[![Known Vulnerabilities](https://snyk.io/test/github/wulkanowy/wulkanowy/badge.svg?targetFile=app%2Fbuild.gradle&style=flat-square)](https://snyk.io/test/github/wulkanowy/wulkanowy?targetFile=app%2Fbuild.gradle)
 [![Bintray](https://img.shields.io/bintray/v/wulkanowy/wulkanowy/api.svg?style=flat-square)](https://bintray.com/wulkanowy/wulkanowy/api)
 
-[Pobierz wersję rozwojową](https://bitrise-redirector.herokuapp.com/v0.1/apps/daeff1893f3c8128/builds/master/artifacts/app-release-bitrise-signed.apk)
+[Pobierz wersję rozwojową](https://bitrise-redirector.herokuapp.com/v0.1/apps/daeff1893f3c8128/builds/master/artifacts/app-debug-bitrise-signed.apk)
 
-Wulkanowy to projekt aplikacji na androida ułatwiającej używanie dziennika VULCANa.
+Androidowy klient dziennika VULCAN UONET+.

android-sonarqube.gradle

@@ -5,7 +5,7 @@ sonarqube {
     //noinspection GroovyAssignabilityCheck
     properties {
         def files = fileTree("${rootProject.projectDir}/api/build/libs/").filter { it.isFile() }.files.name
-        def libraries = project.android.sdkDirectory.getPath() + "/platforms/android-27/android.jar," +
+        def libraries = project.android.sdkDirectory.getPath() + "/platforms/android-26/android.jar," +
                 "${project.rootDir}/api/build/libs/" + files[0]
 
         property "sonar.projectName", GROUP_ID + ":app"

api/build.gradle

@@ -28,12 +28,12 @@ jacocoTestReport {
 }
 
 dependencies {
-    implementation 'org.jsoup:jsoup:1.10.3'
+    implementation "org.jsoup:jsoup:$jsoup"
-    implementation 'org.apache.commons:commons-lang3:3.7'
+    implementation "org.apache.commons:commons-lang3:$apacheLang"
-    implementation 'com.google.code.gson:gson:2.8.2'
+    implementation "com.google.code.gson:gson:$gson"
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation "junit:junit:$junit"
-    testImplementation 'org.mockito:mockito-core:2.13.0'
+    testImplementation "org.mockito:mockito-core:$mockito"
 }
 
 version = PUBLISH_VERSION

api/src/main/java/io/github/wulkanowy/api/Client.java

@@ -5,44 +5,102 @@ import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 
 import java.io.IOException;
+import java.util.Date;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import io.github.wulkanowy.api.login.Login;
 
 public class Client {
 
-    private String protocol;
+    private String protocol = "https";
 
-    private String host;
+    private String host = "vulcan.net.pl";
 
-    private String symbol;
+    private String email;
+
+    private String password;
+
+    private String symbol = "Default";
+
+    private Login login;
+
+    private Date lastSuccessRequest = new Date();
 
     private Cookies cookies = new Cookies();
 
-    Client(String protocol, String host, String symbol) {
+    Client(String email, String password, String symbol) {
-        this.protocol = protocol;
+        this.email = email;
-        this.host = host;
+        this.password = password;
         this.symbol = symbol;
+
+        setFullEndpointInfo(email);
     }
 
-    String getHost() {
+    private void setFullEndpointInfo(String info) {
-        return host;
+        String[] creds = info.split("\\\\");
+
+        email = info;
+
+        if (creds.length > 2) {
+            String[] url = creds[0].split("://");
+
+            protocol = url[0];
+            host = url[1];
+            email = creds[2];
+        }
+    }
+
+    private void login() throws IOException, VulcanException {
+        if (isLoggedIn()) {
+            return;
+        }
+
+        this.symbol = getLogin().login(email, password, symbol);
+    }
+
+    private boolean isLoggedIn() {
+        return getCookies().size() > 0 &&
+                29 > TimeUnit.MILLISECONDS.toMinutes(new Date().getTime() - lastSuccessRequest.getTime());
+
+    }
+
+    Login getLogin() {
+        if (null != login) {
+            return login;
+        }
+
+        login = new Login(this);
+
+        return login;
+    }
+
+    public String getSymbol() {
+        return symbol;
     }
 
     public void setSymbol(String symbol) {
         this.symbol = symbol;
     }
 
-    Map<String, String> getCookies() {
+    private Map<String, String> getCookies() {
         return cookies.getItems();
     }
 
-    private String getFilledUrl(String url) {
+    String getHost() {
+        return host;
+    }
+
+    String getFilledUrl(String url) {
         return url
                 .replace("{schema}", protocol)
                 .replace("{host}", host.replace(":", "%253A"))
-                .replace("{symbol}", symbol == null ? "Default" : symbol);
+                .replace("{symbol}", symbol);
     }
 
-    Document getPageByUrl(String url) throws IOException {
+    Document getPageByUrl(String url) throws IOException, VulcanException {
+        login();
+
         Connection.Response response = Jsoup.connect(getFilledUrl(url))
                 .followRedirects(true)
                 .cookies(getCookies())
@@ -50,10 +108,14 @@ public class Client {
 
         this.cookies.addItems(response.cookies());
 
-        return response.parse();
+        Document doc = checkForErrors(response.parse());
+
+        lastSuccessRequest = new Date();
+
+        return doc;
     }
 
-    public Document postPageByUrl(String url, String[][] params) throws IOException {
+    public Document postPageByUrl(String url, String[][] params) throws IOException, VulcanException {
         Connection connection = Jsoup.connect(getFilledUrl(url));
 
         for (String[] data : params) {
@@ -68,10 +130,12 @@ public class Client {
 
         this.cookies.addItems(response.cookies());
 
-        return response.parse();
+        return checkForErrors(response.parse());
     }
 
-    public String getJsonStringByUrl(String url) throws IOException {
+    public String getJsonStringByUrl(String url) throws IOException, VulcanException {
+        login();
+
         Connection.Response response = Jsoup.connect(getFilledUrl(url))
                 .followRedirects(true)
                 .ignoreContentType(true)
@@ -83,7 +147,9 @@ public class Client {
         return response.body();
     }
 
-    public String postJsonStringByUrl(String url, String[][] params) throws IOException {
+    public String postJsonStringByUrl(String url, String[][] params) throws IOException, VulcanException {
+        login();
+
         Connection connection = Jsoup.connect(getFilledUrl(url));
 
         for (String[] data : params) {
@@ -101,4 +167,18 @@ public class Client {
 
         return response.body();
     }
+
+    Document checkForErrors(Document doc) throws VulcanException {
+        String title = doc.select("title").text();
+        if ("Przerwa techniczna".equals(title)) {
+            throw new VulcanOfflineException(title);
+        }
+
+        String singIn = doc.select(".loginButton").text();
+        if ("Zaloguj się".equals(singIn)) {
+            throw new NotLoggedInErrorException(singIn);
+        }
+
+        return doc;
+    }
 }

api/src/main/java/io/github/wulkanowy/api/Cookies.java

@@ -3,21 +3,15 @@ package io.github.wulkanowy.api;
 import java.util.HashMap;
 import java.util.Map;
 
-public class Cookies {
+class Cookies {
 
     private Map<String, String> jar = new HashMap<>();
 
-    public Map<String, String> getItems() {
+    Map<String, String> getItems() {
         return jar;
     }
 
-    public Cookies setItems(Map<String, String> items) {
+    void addItems(Map<String, String> items) {
-        this.jar = items;
+        jar.putAll(items);
-        return this;
-    }
-
-    public Cookies addItems(Map<String, String> items) {
-        this.jar.putAll(items);
-        return this;
     }
 }

api/src/main/java/io/github/wulkanowy/api/NotLoggedInErrorException.java

@@ -0,0 +1,8 @@
+package io.github.wulkanowy.api;
+
+public class NotLoggedInErrorException extends VulcanException {
+
+    public NotLoggedInErrorException(String message) {
+        super(message);
+    }
+}

api/src/main/java/io/github/wulkanowy/api/SnP.java

@@ -6,19 +6,17 @@ import org.jsoup.nodes.Element;
 import java.io.IOException;
 import java.util.List;
 
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
-
 public interface SnP {
 
     String getId();
 
-    void storeContextCookies() throws IOException, NotLoggedInErrorException;
+    StudentAndParent storeContextCookies() throws IOException, VulcanException;
 
     String getRowDataChildValue(Element e, int index);
 
-    Document getSnPPageDocument(String url) throws IOException;
+    Document getSnPPageDocument(String url) throws IOException, VulcanException;
 
-    List<Semester> getSemesters() throws IOException;
+    List<Semester> getSemesters() throws IOException, VulcanException;
 
     List<Semester> getSemesters(Document gradesPage);
 

api/src/main/java/io/github/wulkanowy/api/StudentAndParent.java

@@ -8,8 +8,6 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
-
 public class StudentAndParent implements SnP {
 
     private static final String START_PAGE_URL = "{schema}://uonetplus.{host}/{symbol}/Start.mvc/Index";
@@ -22,12 +20,8 @@ public class StudentAndParent implements SnP {
 
     private String id;
 
-    StudentAndParent(Client client) {
-        this.client = client;
-    }
-
     StudentAndParent(Client client, String id) {
-        this(client);
+        this.client = client;
         this.id = id;
     }
 
@@ -39,11 +33,12 @@ public class StudentAndParent implements SnP {
         return id;
     }
 
-    public void storeContextCookies() throws IOException, NotLoggedInErrorException {
+    public StudentAndParent storeContextCookies() throws IOException, VulcanException {
         client.getPageByUrl(getSnpHomePageUrl());
+        return this;
     }
 
-    String getSnpHomePageUrl() throws IOException, NotLoggedInErrorException {
+    String getSnpHomePageUrl() throws IOException, VulcanException {
         if (null != getId()) {
             return getBaseUrl();
         }
@@ -53,7 +48,7 @@ public class StudentAndParent implements SnP {
         Element studentTileLink = startPage.select(".panel.linkownia.pracownik.klient > a").first();
 
         if (null == studentTileLink) {
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in. Force login");
         }
 
         String snpPageUrl = studentTileLink.attr("href");
@@ -67,7 +62,7 @@ public class StudentAndParent implements SnP {
         String[] path = snpPageUrl.split(client.getHost())[1].split("/");
 
         if (5 != path.length) {
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in");
         }
 
         return path[2];
@@ -77,11 +72,11 @@ public class StudentAndParent implements SnP {
         return e.select(".daneWiersz .wartosc").get(index - 1).text();
     }
 
-    public Document getSnPPageDocument(String url) throws IOException {
+    public Document getSnPPageDocument(String url) throws IOException, VulcanException {
         return client.getPageByUrl(getBaseUrl() + url);
     }
 
-    public List<Semester> getSemesters() throws IOException {
+    public List<Semester> getSemesters() throws IOException, VulcanException {
         return getSemesters(getSnPPageDocument(GRADES_PAGE_URL));
     }
 

api/src/main/java/io/github/wulkanowy/api/Vulcan.java

@@ -7,12 +7,6 @@ import io.github.wulkanowy.api.attendance.AttendanceTable;
 import io.github.wulkanowy.api.exams.ExamsWeek;
 import io.github.wulkanowy.api.grades.GradesList;
 import io.github.wulkanowy.api.grades.SubjectsList;
-import io.github.wulkanowy.api.login.AccountPermissionException;
-import io.github.wulkanowy.api.login.BadCredentialsException;
-import io.github.wulkanowy.api.login.Login;
-import io.github.wulkanowy.api.login.LoginErrorException;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
-import io.github.wulkanowy.api.login.VulcanOfflineException;
 import io.github.wulkanowy.api.messages.Messages;
 import io.github.wulkanowy.api.notes.AchievementsList;
 import io.github.wulkanowy.api.notes.NotesList;
@@ -26,171 +20,92 @@ public class Vulcan {
 
     private String id;
 
-    private String symbol;
-
     private SnP snp;
 
-    private String protocolSchema = "https";
-
-    private String logHost = "vulcan.net.pl";
-
-    private String email;
-
     private Client client;
 
-    private Login login;
+    public void setCredentials(String email, String password, String symbol, String id) {
-
+        client = new Client(email, password, symbol);
-    public void setClient(Client client) {
-        this.client = client;
-    }
-
-    public void setLogin(Login login) {
-        this.login = login;
-    }
-
-    public void login(String email, String password, String symbol)
-            throws BadCredentialsException, AccountPermissionException,
-            LoginErrorException, IOException, VulcanOfflineException {
-
-        setFullEndpointInfo(email);
-        login = getLogin();
-
-        this.symbol = login.login(this.email, password, symbol);
-    }
-
-    public Vulcan login(String email, String password, String symbol, String id)
-            throws BadCredentialsException, AccountPermissionException,
-            LoginErrorException, IOException, VulcanOfflineException {
-        login(email, password, symbol);
 
         this.id = id;
-
-        return this;
     }
 
-    String getProtocolSchema() {
+    public Client getClient() throws NotLoggedInErrorException {
-        return protocolSchema;
+        if (null == client) {
+            throw new NotLoggedInErrorException("Use setCredentials() method first");
         }
 
-    String getLogHost() {
-        return logHost;
-    }
-
-    public String getEmail() {
-        return email;
-    }
-
-    public String getSymbol() {
-        return symbol;
-    }
-
-    private void setFullEndpointInfo(String email) {
-        String[] creds = email.split("\\\\");
-
-        this.email = email;
-
-        if (creds.length >= 2) {
-            String[] url = creds[0].split("://");
-
-            this.protocolSchema = url[0];
-            this.logHost = url[1];
-            this.email = creds[2];
-        }
-    }
-
-    protected Client getClient() {
-        if (null != client) {
-            return client;
-        }
-
-        client = new Client(getProtocolSchema(), getLogHost(), symbol);
-
         return client;
     }
 
-    protected Login getLogin() {
+    public String getSymbol() throws NotLoggedInErrorException {
-        if (null != login) {
+        return getClient().getSymbol();
-            return login;
+
     }
 
-        login = new Login(getClient());
+    public SnP getStudentAndParent() throws IOException, VulcanException {
-
+        if (null != this.snp) {
-        return login;
+            return this.snp;
         }
 
-    public SnP getStudentAndParent() throws IOException, NotLoggedInErrorException {
+        this.snp = new StudentAndParent(getClient(), id).storeContextCookies();
-        if (0 == getClient().getCookies().size()) {
+
-            throw new NotLoggedInErrorException();
+        return this.snp;
     }
 
-        if (null != snp) {
+    public String getId() throws IOException, VulcanException {
-            return snp;
+        return getStudentAndParent().getId();
     }
 
-        snp = createSnp(getClient(), id);
+    public AttendanceTable getAttendanceTable() throws IOException, VulcanException {
-
-        snp.storeContextCookies();
-
-        return snp;
-    }
-
-    SnP createSnp(Client client, String id) {
-        if (null == id) {
-            return new StudentAndParent(client);
-        }
-
-        return new StudentAndParent(client, id);
-    }
-
-    public AttendanceStatistics getAttendanceStatistics() throws IOException, NotLoggedInErrorException {
-        return new AttendanceStatistics(getStudentAndParent());
-    }
-
-    public AttendanceTable getAttendanceTable() throws IOException, NotLoggedInErrorException {
         return new AttendanceTable(getStudentAndParent());
     }
 
-    public ExamsWeek getExamsList() throws IOException, NotLoggedInErrorException {
+    public AttendanceStatistics getAttendanceStatistics() throws IOException, VulcanException {
+        return new AttendanceStatistics(getStudentAndParent());
+    }
+
+    public ExamsWeek getExamsList() throws IOException, VulcanException {
         return new ExamsWeek(getStudentAndParent());
     }
 
-    public GradesList getGradesList() throws IOException, NotLoggedInErrorException {
+    public GradesList getGradesList() throws IOException, VulcanException {
         return new GradesList(getStudentAndParent());
     }
 
-    public SubjectsList getSubjectsList() throws IOException, NotLoggedInErrorException {
+    public SubjectsList getSubjectsList() throws IOException, VulcanException {
         return new SubjectsList(getStudentAndParent());
     }
 
-    public AchievementsList getAchievementsList() throws IOException, NotLoggedInErrorException {
+    public AchievementsList getAchievementsList() throws IOException, VulcanException {
         return new AchievementsList(getStudentAndParent());
     }
 
-    public NotesList getNotesList() throws IOException, NotLoggedInErrorException {
+    public NotesList getNotesList() throws IOException, VulcanException {
         return new NotesList(getStudentAndParent());
     }
 
-    public SchoolInfo getSchoolInfo() throws IOException, NotLoggedInErrorException {
+    public SchoolInfo getSchoolInfo() throws IOException, VulcanException {
         return new SchoolInfo(getStudentAndParent());
     }
 
-    public TeachersInfo getTeachersInfo() throws IOException, NotLoggedInErrorException {
+    public TeachersInfo getTeachersInfo() throws IOException, VulcanException {
         return new TeachersInfo(getStudentAndParent());
     }
 
-    public Timetable getTimetable() throws IOException, NotLoggedInErrorException {
+    public Timetable getTimetable() throws IOException, VulcanException {
         return new Timetable(getStudentAndParent());
     }
 
-    public BasicInformation getBasicInformation() throws IOException, NotLoggedInErrorException {
+    public BasicInformation getBasicInformation() throws IOException, VulcanException {
         return new BasicInformation(getStudentAndParent());
     }
 
-    public FamilyInformation getFamilyInformation() throws IOException, NotLoggedInErrorException {
+    public FamilyInformation getFamilyInformation() throws IOException, VulcanException {
         return new FamilyInformation(getStudentAndParent());
     }
 
-    public Messages getMessages() {
+    public Messages getMessages() throws VulcanException {
         return new Messages(getClient());
     }
 }

api/src/main/java/io/github/wulkanowy/api/VulcanException.java

@@ -0,0 +1,8 @@
+package io.github.wulkanowy.api;
+
+public abstract class VulcanException extends Exception {
+
+    protected VulcanException(String message) {
+        super(message);
+    }
+}

api/src/main/java/io/github/wulkanowy/api/VulcanOfflineException.java

@@ -0,0 +1,8 @@
+package io.github.wulkanowy.api;
+
+public class VulcanOfflineException extends VulcanException {
+
+    VulcanOfflineException(String message) {
+        super(message);
+    }
+}

api/src/main/java/io/github/wulkanowy/api/attendance/AttendanceStatistics.java

@@ -9,6 +9,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 import io.github.wulkanowy.api.generic.Month;
 import io.github.wulkanowy.api.generic.Subject;
 
@@ -22,15 +23,15 @@ public class AttendanceStatistics {
         this.snp = snp;
     }
 
-    public Types getTypesTable() throws IOException {
+    public Types getTypesTable() throws IOException, VulcanException {
         return getTypesTable("");
     }
 
-    public Types getTypesTable(String tick) throws IOException {
+    public Types getTypesTable(String tick) throws IOException, VulcanException {
         return getTypesTable(tick, -1);
     }
 
-    public List<Subject> getSubjectList() throws IOException {
+    public List<Subject> getSubjectList() throws IOException, VulcanException {
         Element mainContainer = snp.getSnPPageDocument(attendancePageUrl)
                 .select(".mainContainer #idPrzedmiot").first();
 
@@ -46,7 +47,7 @@ public class AttendanceStatistics {
         return subjectList;
     }
 
-    public Types getTypesTable(String tick, Integer subjectId) throws IOException {
+    public Types getTypesTable(String tick, Integer subjectId) throws IOException, VulcanException {
         Element mainContainer = snp.getSnPPageDocument((attendancePageUrl
                 + "?data={tick}&idPrzedmiot={subject}")
                 .replace("{tick}", tick)

api/src/main/java/io/github/wulkanowy/api/attendance/AttendanceTable.java

@@ -4,37 +4,52 @@ import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
 
 import java.io.IOException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
+import java.util.Locale;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 import io.github.wulkanowy.api.generic.Day;
 import io.github.wulkanowy.api.generic.Lesson;
 import io.github.wulkanowy.api.generic.Week;
 
 public class AttendanceTable {
 
-    private SnP snp;
+    private final static String ATTENDANCE_PAGE_URL = "Frekwencja.mvc?data=";
 
-    private String attendancePageUrl = "Frekwencja.mvc?data=";
+    private SnP snp;
 
     public AttendanceTable(SnP snp) {
         this.snp = snp;
     }
 
-    public Week<Day> getWeekTable() throws IOException {
+    public Week<Day> getWeekTable() throws IOException, ParseException, VulcanException {
         return getWeekTable("");
     }
 
-    public Week<Day> getWeekTable(String tick) throws IOException {
+    public Week<Day> getWeekTable(String tick) throws IOException, ParseException, VulcanException {
-        Element table = snp.getSnPPageDocument(attendancePageUrl + tick)
+        Element table = snp.getSnPPageDocument(ATTENDANCE_PAGE_URL + tick)
+
                 .select(".mainContainer .presentData").first();
 
         Elements headerCells = table.select("thead th");
         List<Day> days = new ArrayList<>();
 
         for (int i = 1; i < headerCells.size(); i++) {
-            days.add(new Day().setDate(headerCells.get(i).html().split("<br>")[1]));
+            String[] dayHeaderCell = headerCells.get(i).html().split("<br>");
+
+            SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy", Locale.ROOT);
+            Date d = sdf.parse(dayHeaderCell[1].trim());
+            sdf.applyPattern("yyyy-MM-dd");
+
+            Day day = new Day();
+            day.setDayName(dayHeaderCell[0]);
+            day.setDate(sdf.format(d));
+            days.add(day);
         }
 
         Elements hoursInDays = table.select("tbody tr");
@@ -46,26 +61,29 @@ public class AttendanceTable {
             // fill hours in day
             int size = hours.size();
             for (int i = 1; i < size; i++) {
-                days.get(i - 1).setLesson(getNewLesson(hours.get(i)));
+                Lesson lesson = new Lesson();
-            }
+                lesson.setDate(days.get(i - 1).getDate());
-        }
+                lesson.setNumber(hours.get(0).text());
 
-        String[] dayDescription = headerCells.get(1).html().split("<br>");
+                addLessonDetails(lesson, hours.get(i));
+
+                days.get(i - 1).setLesson(lesson);
+            }
+        }
 
         return new Week<Day>()
-                .setStartDayDate(dayDescription[1])
+                .setStartDayDate(days.get(0).getDate())
                 .setDays(days);
     }
 
-    private Lesson getNewLesson(Element cell) {
+    private void addLessonDetails(Lesson lesson, Element cell) {
-        Lesson lesson = new Lesson();
         lesson.setSubject(cell.select("span").text());
 
         if (LessonTypes.CLASS_NOT_EXIST.equals(cell.attr("class"))) {
             lesson.setNotExist(true);
             lesson.setEmpty(true);
 
-            return lesson;
+            return;
         }
 
         switch (cell.select("div").attr("class")) {
@@ -95,7 +113,5 @@ public class AttendanceTable {
                 lesson.setEmpty(true);
                 break;
         }
-
-        return lesson;
     }
 }

api/src/main/java/io/github/wulkanowy/api/exams/ExamsWeek.java

@@ -9,6 +9,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 import io.github.wulkanowy.api.generic.Week;
 
 public class ExamsWeek {
@@ -21,11 +22,11 @@ public class ExamsWeek {
         this.snp = snp;
     }
 
-    public Week<ExamDay> getCurrent() throws IOException {
+    public Week<ExamDay> getCurrent() throws IOException, VulcanException {
         return getWeek("", true);
     }
 
-    public Week<ExamDay> getWeek(String tick, final boolean onlyNotEmpty) throws IOException {
+    public Week<ExamDay> getWeek(String tick, final boolean onlyNotEmpty) throws IOException, VulcanException {
         Document examsPage = snp.getSnPPageDocument(EXAMS_PAGE_URL + tick);
         Elements examsDays = examsPage.select(".mainContainer > div:not(.navigation)");
 

api/src/main/java/io/github/wulkanowy/api/grades/GradesList.java

@@ -16,6 +16,7 @@ import java.util.regex.Pattern;
 
 import io.github.wulkanowy.api.Semester;
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class GradesList {
 
@@ -33,11 +34,11 @@ public class GradesList {
         return GRADES_PAGE_URL;
     }
 
-    public List<Grade> getAll() throws IOException, ParseException {
+    public List<Grade> getAll() throws IOException, ParseException, VulcanException {
         return getAll("");
     }
 
-    public List<Grade> getAll(String semester) throws IOException, ParseException {
+    public List<Grade> getAll(String semester) throws IOException, ParseException, VulcanException {
         Document gradesPage = snp.getSnPPageDocument(getGradesPageUrl() + semester);
         Elements gradesRows = gradesPage.select(".ocenySzczegoly-table > tbody > tr");
         Semester currentSemester = snp.getCurrentSemester(snp.getSemesters(gradesPage));

api/src/main/java/io/github/wulkanowy/api/grades/SubjectsList.java

@@ -9,6 +9,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class SubjectsList {
 
@@ -20,7 +21,7 @@ public class SubjectsList {
         this.snp = snp;
     }
 
-    public List<Subject> getAll() throws IOException {
+    public List<Subject> getAll() throws IOException, VulcanException {
         Document subjectPage = snp.getSnPPageDocument(SUBJECTS_PAGE_URL);
 
         Elements rows = subjectPage.select(".ocenyZwykle-table > tbody > tr");

api/src/main/java/io/github/wulkanowy/api/login/AccountPermissionException.java

@@ -1,4 +1,10 @@
 package io.github.wulkanowy.api.login;
 
-public class AccountPermissionException extends Exception {
+import io.github.wulkanowy.api.VulcanException;
+
+public class AccountPermissionException extends VulcanException {
+
+    AccountPermissionException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/login/BadCredentialsException.java

@@ -1,4 +1,10 @@
 package io.github.wulkanowy.api.login;
 
-public class BadCredentialsException extends Exception {
+import io.github.wulkanowy.api.VulcanException;
+
+public class BadCredentialsException extends VulcanException {
+
+    BadCredentialsException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/login/Login.java

@@ -2,12 +2,14 @@ package io.github.wulkanowy.api.login;
 
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
 import org.jsoup.parser.Parser;
 import org.jsoup.select.Elements;
 
 import java.io.IOException;
 
 import io.github.wulkanowy.api.Client;
+import io.github.wulkanowy.api.VulcanException;
 
 public class Login {
 
@@ -27,16 +29,13 @@ public class Login {
         this.client = client;
     }
 
-    public String login(String email, String password, String symbol)
+    public String login(String email, String password, String symbol) throws VulcanException, IOException {
-            throws BadCredentialsException, LoginErrorException,
-            AccountPermissionException, IOException, VulcanOfflineException {
         String certificate = sendCredentials(email, password, symbol);
 
         return sendCertificate(certificate, symbol);
     }
 
-    String sendCredentials(String email, String password, String symbol)
+    String sendCredentials(String email, String password, String symbol) throws IOException, VulcanException {
-            throws IOException, BadCredentialsException {
         this.symbol = symbol;
 
         Document html = client.postPageByUrl(LOGIN_PAGE_URL, new String[][]{
@@ -44,33 +43,29 @@ public class Login {
                 {"Password", password}
         });
 
-        if (null != html.select(".ErrorMessage").first()) {
+        Element errorMessage = html.select(".ErrorMessage").first();
-            throw new BadCredentialsException();
+        if (null != errorMessage) {
+            throw new BadCredentialsException(errorMessage.text());
         }
 
         return html.select("input[name=wresult]").attr("value");
     }
 
-    String sendCertificate(String certificate, String defaultSymbol)
+    String sendCertificate(String certificate, String defaultSymbol) throws IOException, VulcanException {
-            throws IOException, LoginErrorException, AccountPermissionException, VulcanOfflineException {
         this.symbol = findSymbol(defaultSymbol, certificate);
         client.setSymbol(this.symbol);
 
-        Document html = client.postPageByUrl(LOGIN_ENDPOINT_PAGE_URL, new String[][]{
+        String title = client.postPageByUrl(LOGIN_ENDPOINT_PAGE_URL, new String[][]{
                 {"wa", "wsignin1.0"},
                 {"wresult", certificate}
-        });
+        }).select("title").text();
 
-        if (html.getElementsByTag("title").text().equals("Logowanie")) {
+        if ("Logowanie".equals(title)) {
-            throw new AccountPermissionException();
+            throw new AccountPermissionException("No account access. Try another symbol");
         }
 
-        if (html.getElementsByTag("title").text().equals("Przerwa techniczna")) {
+        if (!"Uonet+".equals(title)) {
-            throw new VulcanOfflineException();
+            throw new LoginErrorException("Could not log in, unknown error");
-        }
-
-        if (!html.select("title").text().equals("Uonet+")) {
-            throw new LoginErrorException();
         }
 
         return this.symbol;
@@ -85,7 +80,8 @@ public class Login {
     }
 
     String findSymbolInCertificate(String certificate) {
-        Elements els = Jsoup.parse(certificate.replaceAll(":", ""), "", Parser.xmlParser())
+        Elements els = Jsoup
+                .parse(certificate.replaceAll(":", ""), "", Parser.xmlParser())
                 .select("[AttributeName=\"UserInstance\"] samlAttributeValue");
 
         if (els.isEmpty()) {

api/src/main/java/io/github/wulkanowy/api/login/LoginErrorException.java

@@ -1,4 +1,10 @@
 package io.github.wulkanowy.api.login;
 
-public class LoginErrorException extends NotLoggedInErrorException {
+import io.github.wulkanowy.api.NotLoggedInErrorException;
+
+class LoginErrorException extends NotLoggedInErrorException {
+
+    LoginErrorException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/login/NotLoggedInErrorException.java

@@ -1,4 +0,0 @@
-package io.github.wulkanowy.api.login;
-
-public class NotLoggedInErrorException extends Exception {
-}

api/src/main/java/io/github/wulkanowy/api/login/VulcanOfflineException.java

@@ -1,4 +0,0 @@
-package io.github.wulkanowy.api.login;
-
-public class VulcanOfflineException extends Exception {
-}

api/src/main/java/io/github/wulkanowy/api/messages/BadRequestException.java

@@ -1,4 +1,10 @@
 package io.github.wulkanowy.api.messages;
 
-class BadRequestException extends Exception {
+import io.github.wulkanowy.api.VulcanException;
+
+class BadRequestException extends VulcanException {
+
+    BadRequestException(String message) {
+        super(message);
+    }
 }

api/src/main/java/io/github/wulkanowy/api/messages/Messages.java

@@ -7,7 +7,8 @@ import java.io.IOException;
 import java.util.List;
 
 import io.github.wulkanowy.api.Client;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.NotLoggedInErrorException;
+import io.github.wulkanowy.api.VulcanException;
 
 public class Messages {
 
@@ -37,19 +38,19 @@ public class Messages {
         this.client = client;
     }
 
-    public List<Message> getReceived() throws IOException, NotLoggedInErrorException, BadRequestException {
+    public List<Message> getReceived() throws IOException, VulcanException {
         return getMessages(RECEIVED_URL);
     }
 
-    public List<Message> getSent() throws IOException, NotLoggedInErrorException, BadRequestException {
+    public List<Message> getSent() throws IOException, VulcanException {
         return getMessages(SENT_URL);
     }
 
-    public List<Message> getDeleted() throws IOException, NotLoggedInErrorException, BadRequestException {
+    public List<Message> getDeleted() throws IOException, VulcanException {
         return getMessages(DELETED_URL);
     }
 
-    private List<Message> getMessages(String url) throws IOException, NotLoggedInErrorException, BadRequestException {
+    private List<Message> getMessages(String url) throws IOException, VulcanException {
         String res = client.getJsonStringByUrl(url);
 
         List<Message> messages;
@@ -58,16 +59,16 @@ public class Messages {
             messages = new Gson().fromJson(res, MessagesContainer.class).data;
         } catch (JsonParseException e) {
             if (res.contains(ERROR_TITLE)) {
-                throw new BadRequestException();
+                throw new BadRequestException(ERROR_TITLE);
             }
 
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in");
         }
 
         return messages;
     }
 
-    public Message getMessage(int id, int folder) throws IOException, BadRequestException, NotLoggedInErrorException {
+    public Message getMessage(int id, int folder) throws IOException, VulcanException {
         String res = client.postJsonStringByUrl(MESSAGE_URL, new String[][]{
                 {"idWiadomosc", String.valueOf(id)},
                 {"Folder", String.valueOf(folder)}
@@ -79,10 +80,10 @@ public class Messages {
             message = new Gson().fromJson(res, MessageContainer.class).data;
         } catch (JsonParseException e) {
             if (res.contains(ERROR_TITLE)) {
-                throw new BadRequestException();
+                throw new BadRequestException(ERROR_TITLE);
             }
 
-            throw new NotLoggedInErrorException();
+            throw new NotLoggedInErrorException("You are probably not logged in. Force login");
         }
 
         return message;

api/src/main/java/io/github/wulkanowy/api/notes/AchievementsList.java

@@ -8,6 +8,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class AchievementsList {
 
@@ -21,7 +22,7 @@ public class AchievementsList {
         this.snp = snp;
     }
 
-    public List<String> getAllAchievements() throws IOException {
+    public List<String> getAllAchievements() throws IOException, VulcanException {
         Element pageFragment = snp.getSnPPageDocument(NOTES_PAGE_URL)
                 .select(".mainContainer > div").get(1);
         Elements items = pageFragment.select("article");

api/src/main/java/io/github/wulkanowy/api/notes/NotesList.java

@@ -8,6 +8,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class NotesList {
 
@@ -21,7 +22,7 @@ public class NotesList {
         this.snp = snp;
     }
 
-    public List<Note> getAllNotes() throws IOException {
+    public List<Note> getAllNotes() throws IOException, VulcanException {
         Element pageFragment = snp.getSnPPageDocument(NOTES_PAGE_URL)
                 .select(".mainContainer > div").get(0);
         Elements items = pageFragment.select("article");

api/src/main/java/io/github/wulkanowy/api/school/SchoolInfo.java

@@ -5,6 +5,7 @@ import org.jsoup.nodes.Element;
 import java.io.IOException;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class SchoolInfo {
 
@@ -16,7 +17,7 @@ public class SchoolInfo {
         this.snp = snp;
     }
 
-    public SchoolData getSchoolData() throws IOException {
+    public SchoolData getSchoolData() throws IOException, VulcanException {
         Element e = snp.getSnPPageDocument(SCHOOL_PAGE_URL)
                 .select(".mainContainer > article").get(0);
 

api/src/main/java/io/github/wulkanowy/api/school/TeachersInfo.java

@@ -9,6 +9,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class TeachersInfo {
 
@@ -20,7 +21,7 @@ public class TeachersInfo {
         this.snp = snp;
     }
 
-    public TeachersData getTeachersData() throws IOException {
+    public TeachersData getTeachersData() throws IOException, VulcanException {
         Document doc = snp.getSnPPageDocument(SCHOOL_PAGE_URL);
         Elements rows = doc.select(".mainContainer > table tbody tr");
         String description = doc.select(".mainContainer > p").first().text();

api/src/main/java/io/github/wulkanowy/api/timetable/Timetable.java

@@ -13,6 +13,7 @@ import java.util.List;
 import java.util.Locale;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 import io.github.wulkanowy.api.generic.Day;
 import io.github.wulkanowy.api.generic.Lesson;
 import io.github.wulkanowy.api.generic.Week;
@@ -27,11 +28,11 @@ public class Timetable {
         this.snp = snp;
     }
 
-    public Week<Day> getWeekTable() throws IOException, ParseException {
+    public Week<Day> getWeekTable() throws IOException, ParseException, VulcanException {
         return getWeekTable("");
     }
 
-    public Week<Day> getWeekTable(final String tick) throws IOException, ParseException {
+    public Week<Day> getWeekTable(final String tick) throws IOException, ParseException, VulcanException {
         Element table = snp.getSnPPageDocument(TIMETABLE_PAGE_URL + tick)
                 .select(".mainContainer .presentData").first();
 

api/src/main/java/io/github/wulkanowy/api/user/BasicInformation.java

@@ -6,6 +6,7 @@ import org.jsoup.nodes.Element;
 import java.io.IOException;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class BasicInformation {
 
@@ -21,7 +22,7 @@ public class BasicInformation {
         this.snp = snp;
     }
 
-    public Document getStudentDataPageDocument() throws IOException {
+    public Document getStudentDataPageDocument() throws IOException, VulcanException {
         if (null == studentDataPageDocument) {
             studentDataPageDocument = snp.getSnPPageDocument(STUDENT_DATA_PAGE_URL);
         }
@@ -29,7 +30,7 @@ public class BasicInformation {
         return studentDataPageDocument;
     }
 
-    public PersonalData getPersonalData() throws IOException {
+    public PersonalData getPersonalData() throws IOException, VulcanException {
         Element e = getStudentDataPageDocument().select(CONTENT_QUERY).get(0);
 
         String name = snp.getRowDataChildValue(e, 1);
@@ -48,7 +49,7 @@ public class BasicInformation {
                 .setParentsNames(snp.getRowDataChildValue(e, 7));
     }
 
-    public AddressData getAddressData() throws IOException {
+    public AddressData getAddressData() throws IOException, VulcanException {
         Element e = getStudentDataPageDocument().select(CONTENT_QUERY).get(1);
 
         return new AddressData()
@@ -58,7 +59,7 @@ public class BasicInformation {
 
     }
 
-    public ContactDetails getContactDetails() throws IOException {
+    public ContactDetails getContactDetails() throws IOException, VulcanException {
         Element e = getStudentDataPageDocument().select(CONTENT_QUERY).get(2);
 
         return new ContactDetails()

api/src/main/java/io/github/wulkanowy/api/user/FamilyInformation.java

@@ -8,6 +8,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import io.github.wulkanowy.api.SnP;
+import io.github.wulkanowy.api.VulcanException;
 
 public class FamilyInformation {
 
@@ -19,7 +20,7 @@ public class FamilyInformation {
         this.snp = snp;
     }
 
-    public List<FamilyMember> getFamilyMembers() throws IOException {
+    public List<FamilyMember> getFamilyMembers() throws IOException, VulcanException {
         Elements membersElements = snp.getSnPPageDocument(STUDENT_DATA_PAGE_URL)
                 .select(".mainContainer > article:nth-of-type(n+4)");
 

api/src/test/java/io/github/wulkanowy/api/ClientTest.java

@@ -0,0 +1,80 @@
+package io.github.wulkanowy.api;
+
+import org.hamcrest.CoreMatchers;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.junit.Assert;
+import org.junit.Test;
+
+import io.github.wulkanowy.api.login.Login;
+
+public class ClientTest {
+
+    private String getFixtureAsString(String fixtureFileName) {
+        return FixtureHelper.getAsString(getClass().getResourceAsStream(fixtureFileName));
+    }
+
+    @Test
+    public void setFullEndpointInfoTest() throws Exception {
+        Client client = new Client("http://fakelog.net\\\\admin", "pass", "Default");
+
+        Assert.assertEquals("fakelog.net", client.getHost());
+        Assert.assertEquals("Default", client.getSymbol());
+    }
+
+    @Test
+    public void checkForNoErrorsTest() throws Exception {
+        Client client = new Client("", "", "");
+
+        Document doc = Jsoup.parse(getFixtureAsString("login/Logowanie-success.html"));
+
+        Assert.assertEquals(doc, client.checkForErrors(doc));
+    }
+
+    @Test(expected = VulcanOfflineException.class)
+    public void checkForErrorsOffline() throws Exception {
+        Client client = new Client("", "", "");
+
+        Document doc = Jsoup.parse(getFixtureAsString("login/PrzerwaTechniczna.html"));
+
+        client.checkForErrors(doc);
+    }
+
+    @Test(expected = NotLoggedInErrorException.class)
+    public void checkForErrors() throws Exception {
+        Client client = new Client("", "", "");
+
+        Document doc = Jsoup.parse(getFixtureAsString("login/Logowanie-notLoggedIn.html"));
+
+        client.checkForErrors(doc);
+    }
+
+    @Test
+    public void getClientTest() throws Exception {
+        Client client = new Client("", "", "");
+
+        Assert.assertThat(client.getLogin(), CoreMatchers.instanceOf(Login.class));
+    }
+
+    @Test
+    public void getClientTwiceTest() throws Exception {
+        Client client = new Client("", "", "");
+
+        Assert.assertEquals(client.getLogin(), client.getLogin());
+    }
+
+    @Test
+    public void getFilledUrlTest() throws Exception {
+        Client client = new Client("http://fakelog.cf\\\\admin", "", "symbol123");
+
+        Assert.assertEquals("http://uonetplus.fakelog.cf/symbol123/LoginEndpoint.aspx",
+                client.getFilledUrl("{schema}://uonetplus.{host}/{symbol}/LoginEndpoint.aspx"));
+    }
+
+    @Test
+    public void getSymbolTest() throws Exception {
+        Client client = new Client("", "", "symbol4321");
+
+        Assert.assertEquals("symbol4321", client.getSymbol());
+    }
+}

api/src/test/java/io/github/wulkanowy/api/StudentAndParentTest.java

@@ -10,8 +10,6 @@ import org.mockito.Mockito;
 import java.util.ArrayList;
 import java.util.List;
 
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
-
 public class StudentAndParentTest {
 
     private Client client;
@@ -45,7 +43,7 @@ public class StudentAndParentTest {
 
         Mockito.when(client.getHost()).thenReturn("vulcan.net.pl");
         Mockito.when(client.getPageByUrl(Mockito.anyString())).thenReturn(startPageDocument);
-        StudentAndParent snp = new StudentAndParent(client);
+        StudentAndParent snp = new StudentAndParent(client, null);
 
         Assert.assertEquals("https://uonetplus-opiekun.vulcan.net.pl/symbol/534213/Start/Index/",
                 snp.getSnpHomePageUrl());
@@ -58,7 +56,7 @@ public class StudentAndParentTest {
         );
 
         Mockito.when(client.getPageByUrl(Mockito.anyString())).thenReturn(wrongPageDocument);
-        StudentAndParent snp = new StudentAndParent(client);
+        StudentAndParent snp = new StudentAndParent(client, null);
 
         snp.getSnpHomePageUrl();
     }

api/src/test/java/io/github/wulkanowy/api/VulcanTest.java

@@ -1,86 +1,31 @@
 package io.github.wulkanowy.api;
 
+import org.hamcrest.CoreMatchers;
 import org.junit.Assert;
-import org.junit.Before;
 import org.junit.Test;
-import org.mockito.Mockito;
-
-import java.util.HashMap;
-import java.util.Map;
-
-import io.github.wulkanowy.api.login.Login;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
 
 public class VulcanTest {
 
-    private Vulcan vulcan;
+    @Test(expected = NotLoggedInErrorException.class)
+    public void getClientWithoutLoginTest() throws Exception {
+        Vulcan vulcan = new Vulcan();
 
-    @Before
+        vulcan.getClient();
-    public void setUp() throws Exception {
-        vulcan = new Vulcan();
-        vulcan.setClient(Mockito.mock(Client.class));
-        vulcan.setLogin(Mockito.mock(Login.class));
     }
 
     @Test
-    public void setFullEndpointInfoTest() throws Exception {
+    public void getClientTest() throws Exception {
-        vulcan.login("http://fakelog.net\\\\admin", "pass", "Default", "123");
+        Vulcan vulcan = new Vulcan();
+        vulcan.setCredentials("email", "password", "symbol", null);
 
-        Assert.assertEquals("http", vulcan.getProtocolSchema());
+        Assert.assertThat(vulcan.getClient(), CoreMatchers.instanceOf(Client.class));
-        Assert.assertEquals("fakelog.net", vulcan.getLogHost());
-        Assert.assertEquals("admin", vulcan.getEmail());
     }
 
     @Test
     public void getClientTwiceTest() throws Exception {
         Vulcan vulcan = new Vulcan();
-        Assert.assertTrue(vulcan.getClient().equals(vulcan.getClient()));
+        vulcan.setCredentials("email", "password", "symbol", null);
-    }
 
-    @Test
+        Assert.assertEquals(vulcan.getClient(), vulcan.getClient());
-    public void getLoginTwiceTest() throws Exception {
-        Vulcan vulcan = new Vulcan();
-        Assert.assertTrue(vulcan.getLogin().equals(vulcan.getLogin()));
-    }
-
-    @Test(expected = NotLoggedInErrorException.class)
-    public void getStudentAndParentNotLoggedInTest() throws Exception {
-        vulcan.getStudentAndParent();
-    }
-
-    @Test
-    public void getStudentAndParentTwiceTest() throws Exception {
-        Client client = Mockito.mock(Client.class);
-        Map<String, String> cookies = new HashMap<>();
-        cookies.put("test", "test");
-        Mockito.when(client.getCookies()).thenReturn(cookies);
-
-        SnP snp = Mockito.mock(StudentAndParent.class);
-        Mockito.doNothing().when(snp).storeContextCookies();
-
-        Vulcan vulcan = Mockito.mock(Vulcan.class);
-        Mockito.when(vulcan.getClient()).thenReturn(client);
-        Mockito.when(vulcan.getStudentAndParent()).thenCallRealMethod();
-        Mockito.when(vulcan.createSnp(Mockito.any(Client.class), Mockito.any())).thenReturn(snp);
-
-        vulcan.getStudentAndParent();
-        vulcan.getStudentAndParent();
-    }
-
-    @Test
-    public void createSnPTest() throws Exception {
-        vulcan.login("wulkanowy@wulkanowy.io", "wulkanowy123", "wulkan");
-
-        SnP snp1 = vulcan.createSnp(Mockito.mock(Client.class), null);
-        Assert.assertEquals(null, snp1.getId());
-
-        SnP snp2 = vulcan.createSnp(Mockito.mock(Client.class), "wulkan");
-        Assert.assertEquals("wulkan", snp2.getId());
-
-    }
-
-    @Test(expected = NotLoggedInErrorException.class)
-    public void getAttendanceExceptionText() throws Exception {
-        vulcan.getAttendanceTable();
     }
 }

api/src/test/java/io/github/wulkanowy/api/attendance/AttendanceTableTest.java

@@ -20,8 +20,8 @@ public class AttendanceTableTest extends StudentAndParentTestCase {
 
     @Test
     public void getWeekStartByDate() throws Exception {
-        Assert.assertEquals("31.08.2015", excellent.getWeekTable().getStartDayDate());
+        Assert.assertEquals("2015-08-31", excellent.getWeekTable().getStartDayDate());
-        Assert.assertEquals("05.09.2016", full.getWeekTable().getStartDayDate());
+        Assert.assertEquals("2016-09-05", full.getWeekTable().getStartDayDate());
     }
 
     @Test
@@ -38,13 +38,13 @@ public class AttendanceTableTest extends StudentAndParentTestCase {
 
     @Test
     public void getDayDate() throws Exception {
-        Assert.assertEquals("31.08.2015", excellent.getWeekTable().getDay(0).getDate());
+        Assert.assertEquals("2015-08-31", excellent.getWeekTable().getDay(0).getDate());
-        Assert.assertEquals("02.09.2015", excellent.getWeekTable().getDay(2).getDate());
+        Assert.assertEquals("2015-09-02", excellent.getWeekTable().getDay(2).getDate());
-        Assert.assertEquals("04.09.2015", excellent.getWeekTable().getDay(4).getDate());
+        Assert.assertEquals("2015-09-04", excellent.getWeekTable().getDay(4).getDate());
 
-        Assert.assertEquals("05.09.2016", full.getWeekTable().getDay(0).getDate());
+        Assert.assertEquals("2016-09-05", full.getWeekTable().getDay(0).getDate());
-        Assert.assertEquals("07.09.2016", full.getWeekTable().getDay(2).getDate());
+        Assert.assertEquals("2016-09-07", full.getWeekTable().getDay(2).getDate());
-        Assert.assertEquals("09.09.2016", full.getWeekTable().getDay(4).getDate());
+        Assert.assertEquals("2016-09-09", full.getWeekTable().getDay(4).getDate());
     }
 
     @Test

api/src/test/java/io/github/wulkanowy/api/login/LoginTest.java

@@ -1,6 +1,5 @@
 package io.github.wulkanowy.api.login;
 
-
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.junit.Assert;
@@ -79,13 +78,6 @@ public class LoginTest {
         login.sendCertificate(getFixtureAsString("cert.xml"), "demo123");
     }
 
-    @Test(expected = VulcanOfflineException.class)
-    public void sendCertificateVulcanOfflineTest() throws Exception {
-        Login login = new Login(getClient("PrzerwaTechniczna.html"));
-
-        login.sendCertificate(getFixtureAsString("cert.xml"), "demo123");
-    }
-
     @Test
     public void findSymbolInCertificateTest() throws Exception {
         Login login = new Login(getClient("Logowanie-certyfikat.html"));

api/src/test/java/io/github/wulkanowy/api/messages/MessagesTest.java

@@ -8,7 +8,7 @@ import java.util.List;
 
 import io.github.wulkanowy.api.Client;
 import io.github.wulkanowy.api.FixtureHelper;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.NotLoggedInErrorException;
 
 public class MessagesTest {
 

api/src/test/resources/io/github/wulkanowy/api/login/Logowanie-notLoggedIn.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <title>Dziennik UONET+</title>
+</head>
+<body>
+<div id="MainPage_InfoPage">
+    <div class="startScreen">
+        <div class="topBar">
+            <div class="loginBox">
+                <div>
+                    <a href="/LoginEndpoint.aspx" class="loginButton"></a>
+                    <a href="/LoginEndpoint.aspx" class="loginButton">Zaloguj się</a>
+                </div>
+            </div>
+        </div>
+        <div class="bottomBar"><span>Uonet+ wersja 17.09.0007.26300</span></div>
+    </div>
+</div>
+</body>
+</html>

app/build.gradle

@@ -21,15 +21,15 @@ apply from: '../jacoco.gradle'
 apply from: '../android-sonarqube.gradle'
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 26
-    buildToolsVersion "27.0.3"
+    buildToolsVersion '27.0.3'
     defaultConfig {
         applicationId "io.github.wulkanowy"
         testApplicationId "io.github.tests.wulkanowy"
         minSdkVersion 15
-        targetSdkVersion 27
+        targetSdkVersion 26
-        versionCode 1
+        versionCode 6
-        versionName "0.1.0"
+        versionName "0.3.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
         manifestPlaceholders = [
@@ -43,6 +43,8 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
         debug {
+            applicationIdSuffix ".dev"
+            versionNameSuffix "-dev"
             testCoverageEnabled = true
             ext.enableCrashlytics = false
         }
@@ -60,47 +62,46 @@ android {
 }
 
 greendao {
-    schemaVersion 20
+    schemaVersion 22
     generateTests = true
 }
 
 dependencies {
     implementation project(':api')
-    implementation 'com.android.support:appcompat-v7:27.1.0'
+    implementation "com.android.support:support-v4:$supportVersion"
-    implementation 'com.android.support:design:27.1.0'
+    implementation "com.android.support:design:$supportVersion"
-    implementation 'com.android.support:support-v4:27.1.0'
+    implementation "com.android.support:cardview-v7:$supportVersion"
-    implementation 'com.android.support:recyclerview-v7:27.1.0'
+    implementation "com.android.support:customtabs:$supportVersion"
-    implementation 'com.android.support:cardview-v7:27.1.0'
+    implementation "com.android.support:preference-v14:$supportVersion"
-    implementation 'com.android.support:customtabs:27.1.0'
+    implementation "com.firebase:firebase-jobdispatcher:$firebaseJob"
-    implementation 'com.firebase:firebase-jobdispatcher:0.8.5'
+    implementation "org.apache.commons:commons-lang3:$apacheLang"
-    implementation 'org.apache.commons:commons-lang3:3.7'
+    implementation "org.apache.commons:commons-collections4:$apacheCollections"
-    implementation 'eu.davidea:flexible-adapter:5.0.0-rc4'
+    implementation "eu.davidea:flexible-adapter:$flexibleAdapter"
-    implementation 'eu.davidea:flexible-adapter-ui:1.0.0-b1'
+    implementation "eu.davidea:flexible-adapter-ui:$flexibleUi"
-    implementation 'org.apache.commons:commons-collections4:4.1'
+    implementation "org.greenrobot:greendao:$greenDao"
-    implementation 'org.greenrobot:greendao:3.2.2'
+    implementation "com.github.yuweiguocn:GreenDaoUpgradeHelper:$greenDaoHelper"
-    implementation 'com.jakewharton:butterknife:8.8.1'
+    implementation "com.jakewharton:butterknife:$butterknife"
-    implementation 'joda-time:joda-time:2.9.9'
+    implementation "com.google.dagger:dagger-android-support:$dagger2"
-    implementation 'com.google.dagger:dagger-android:2.14.1'
+    implementation "com.aurelhubert:ahbottomnavigation:$ahbottom"
-    implementation 'com.google.dagger:dagger-android-support:2.14.1'
+    implementation "com.jakewharton.threetenabp:threetenabp:$threeTenABP"
-    implementation 'com.aurelhubert:ahbottomnavigation:2.1.0'
 
-    implementation('com.crashlytics.sdk.android:crashlytics:2.8.0@aar') {
+    implementation("com.crashlytics.sdk.android:crashlytics:$crashlyticsSdk@aar") {
         transitive = true
     }
-    implementation('com.crashlytics.sdk.android:answers:1.4.1@aar') {
+    implementation("com.crashlytics.sdk.android:answers:$crashlyticsAnswers@aar") {
         transitive = true
     }
 
-    annotationProcessor 'com.google.dagger:dagger-android-processor:2.14.1'
+    annotationProcessor "com.google.dagger:dagger-android-processor:$dagger2"
-    annotationProcessor 'com.google.dagger:dagger-compiler:2.14.1'
+    annotationProcessor "com.google.dagger:dagger-compiler:$dagger2"
-    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
+    annotationProcessor "com.jakewharton:butterknife-compiler:$butterknife"
 
-    debugImplementation 'com.amitshekhar.android:debug-db:1.0.1'
+    debugImplementation "com.amitshekhar.android:debug-db:$debugDb"
-    debugImplementation 'net.zetetic:android-database-sqlcipher:3.5.9'
+    debugImplementation "net.zetetic:android-database-sqlcipher:$sqlcipher"
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation "junit:junit:$junit"
-    testImplementation 'org.mockito:mockito-core:2.13.0'
+    testImplementation "org.mockito:mockito-core:$mockito"
 
-    androidTestImplementation 'com.android.support.test:runner:1.0.1'
+    androidTestImplementation "com.android.support.test:runner:$testRunner"
-    androidTestImplementation 'org.mockito:mockito-android:2.13.0'
+    androidTestImplementation "org.mockito:mockito-android:$mockito"
 }

app/src/androidTest/java/io/github/wulkanowy/data/db/dao/entities/AttendanceLessonTest.java

@@ -0,0 +1,28 @@
+package io.github.wulkanowy.data.db.dao.entities;
+
+import org.greenrobot.greendao.test.AbstractDaoTestLongPk;
+
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLessonDao;
+
+public class AttendanceLessonTest extends AbstractDaoTestLongPk<AttendanceLessonDao, AttendanceLesson> {
+
+    public AttendanceLessonTest() {
+        super(AttendanceLessonDao.class);
+    }
+
+    @Override
+    protected AttendanceLesson createEntity(Long key) {
+        AttendanceLesson entity = new AttendanceLesson();
+        entity.setId(key);
+        entity.setIsPresence(false);
+        entity.setIsAbsenceUnexcused(false);
+        entity.setIsAbsenceExcused(false);
+        entity.setIsUnexcusedLateness(false);
+        entity.setIsAbsenceForSchoolReasons(false);
+        entity.setIsExcusedLateness(false);
+        entity.setIsExemption(false);
+        return entity;
+    }
+
+}

app/src/androidTest/java/io/github/wulkanowy/data/db/dao/entities/TimetableLessonTest.java

@@ -2,15 +2,18 @@ package io.github.wulkanowy.data.db.dao.entities;
 
 import org.greenrobot.greendao.test.AbstractDaoTestLongPk;
 
-public class LessonTest extends AbstractDaoTestLongPk<LessonDao, Lesson> {
+import io.github.wulkanowy.data.db.dao.entities.TimetableLesson;
+import io.github.wulkanowy.data.db.dao.entities.TimetableLessonDao;
 
-    public LessonTest() {
+public class TimetableLessonTest extends AbstractDaoTestLongPk<TimetableLessonDao, TimetableLesson> {
-        super(LessonDao.class);
+
+    public TimetableLessonTest() {
+        super(TimetableLessonDao.class);
     }
 
     @Override
-    protected Lesson createEntity(Long key) {
+    protected TimetableLesson createEntity(Long key) {
-        Lesson entity = new Lesson();
+        TimetableLesson entity = new TimetableLesson();
         entity.setId(key);
         entity.setIsEmpty(false);
         entity.setIsDivisionIntoGroups(false);

app/src/debug/res/values-pl/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Wulkanowy DEV</string>
+</resources>

app/src/debug/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Wulkanowy DEV</string>
+</resources>

app/src/main/java/io/github/wulkanowy/WulkanowyApp.java

@@ -4,6 +4,7 @@ import android.app.Application;
 
 import com.crashlytics.android.Crashlytics;
 import com.crashlytics.android.core.CrashlyticsCore;
+import com.jakewharton.threetenabp.AndroidThreeTen;
 
 import org.greenrobot.greendao.query.QueryBuilder;
 
@@ -16,6 +17,7 @@ import io.github.wulkanowy.data.RepositoryContract;
 import io.github.wulkanowy.di.component.ApplicationComponent;
 import io.github.wulkanowy.di.component.DaggerApplicationComponent;
 import io.github.wulkanowy.di.modules.ApplicationModule;
+import io.github.wulkanowy.utils.LogUtils;
 
 public class WulkanowyApp extends Application {
 
@@ -27,6 +29,8 @@ public class WulkanowyApp extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
+        AndroidThreeTen.init(this);
+
         applicationComponent = DaggerApplicationComponent
                 .builder()
                 .applicationModule(new ApplicationModule(this))
@@ -37,6 +41,17 @@ public class WulkanowyApp extends Application {
             enableDebugLog();
         }
         initializeFabric();
+        initializeUserSession();
+    }
+
+    private void initializeUserSession() {
+        if (repository.getCurrentUserId() != 0) {
+            try {
+                repository.initLastUser();
+            } catch (Exception e) {
+                LogUtils.error("An error occurred when the application was started", e);
+            }
+        }
     }
 
     private void enableDebugLog() {

app/src/main/java/io/github/wulkanowy/data/Repository.java

@@ -1,6 +1,5 @@
 package io.github.wulkanowy.data;
 
-
 import java.io.IOException;
 import java.text.ParseException;
 import java.util.List;
@@ -8,11 +7,9 @@ import java.util.List;
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
-import io.github.wulkanowy.api.login.AccountPermissionException;
+import io.github.wulkanowy.api.VulcanException;
-import io.github.wulkanowy.api.login.BadCredentialsException;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
-import io.github.wulkanowy.api.login.VulcanOfflineException;
 import io.github.wulkanowy.data.db.dao.entities.Account;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
 import io.github.wulkanowy.data.db.dao.entities.DaoSession;
 import io.github.wulkanowy.data.db.dao.entities.Grade;
 import io.github.wulkanowy.data.db.dao.entities.GradeDao;
@@ -21,7 +18,8 @@ import io.github.wulkanowy.data.db.dao.entities.WeekDao;
 import io.github.wulkanowy.data.db.resources.ResourcesContract;
 import io.github.wulkanowy.data.db.shared.SharedPrefContract;
 import io.github.wulkanowy.data.sync.SyncContract;
-import io.github.wulkanowy.data.sync.login.LoginSyncContract;
+import io.github.wulkanowy.data.sync.account.AccountSyncContract;
+import io.github.wulkanowy.data.sync.attendance.AttendanceSyncContract;
 import io.github.wulkanowy.data.sync.timetable.TimetableSyncContract;
 import io.github.wulkanowy.di.annotations.SyncGrades;
 import io.github.wulkanowy.di.annotations.SyncSubjects;
@@ -36,7 +34,9 @@ public class Repository implements RepositoryContract {
 
     private final DaoSession daoSession;
 
-    private final LoginSyncContract loginSync;
+    private final AccountSyncContract accountSync;
+
+    private final AttendanceSyncContract attendanceSync;
 
     private final TimetableSyncContract timetableSync;
 
@@ -48,14 +48,16 @@ public class Repository implements RepositoryContract {
     Repository(SharedPrefContract sharedPref,
                ResourcesContract resources,
                DaoSession daoSession,
-               LoginSyncContract loginSync,
+               AccountSyncContract accountSync,
+               AttendanceSyncContract attendanceSync,
                TimetableSyncContract timetableSync,
                @SyncGrades SyncContract gradeSync,
                @SyncSubjects SyncContract subjectSync) {
         this.sharedPref = sharedPref;
         this.resources = resources;
         this.daoSession = daoSession;
-        this.loginSync = loginSync;
+        this.accountSync = accountSync;
+        this.attendanceSync = attendanceSync;
         this.timetableSync = timetableSync;
         this.gradeSync = gradeSync;
         this.subjectSync = subjectSync;
@@ -66,6 +68,31 @@ public class Repository implements RepositoryContract {
         return sharedPref.getCurrentUserId();
     }
 
+    @Override
+    public int getStartupTab() {
+        return sharedPref.getStartupTab();
+    }
+
+    @Override
+    public int getServicesInterval() {
+        return sharedPref.getServicesInterval();
+    }
+
+    @Override
+    public boolean isServicesEnable() {
+        return sharedPref.isServicesEnable();
+    }
+
+    @Override
+    public boolean isNotifyEnable() {
+        return sharedPref.isNotifyEnable();
+    }
+
+    @Override
+    public boolean isMobileDisable() {
+        return sharedPref.isMobileDisable();
+    }
+
     @Override
     public String[] getSymbolsKeysArray() {
         return resources.getSymbolsKeysArray();
@@ -82,42 +109,56 @@ public class Repository implements RepositoryContract {
     }
 
     @Override
-    public void loginUser(String email, String password, String symbol)
+    public String getAttendanceLessonDescription(AttendanceLesson lesson) {
-            throws NotLoggedInErrorException, AccountPermissionException, IOException,
+        return resources.getAttendanceLessonDescription(lesson);
-            CryptoException, VulcanOfflineException, BadCredentialsException {
-        loginSync.loginUser(email, password, symbol);
     }
 
     @Override
-    public void loginCurrentUser() throws NotLoggedInErrorException, AccountPermissionException,
+    public void registerUser(String email, String password, String symbol) throws VulcanException,
-            IOException, CryptoException, VulcanOfflineException, BadCredentialsException {
+            IOException, CryptoException {
-        loginSync.loginCurrentUser();
+        accountSync.registerUser(email, password, symbol);
     }
 
     @Override
-    public void syncGrades() throws NotLoggedInErrorException, IOException, ParseException {
+    public void initLastUser() throws VulcanException, IOException, CryptoException {
+        accountSync.initLastUser();
+    }
+
+    @Override
+    public void syncGrades() throws VulcanException, IOException, ParseException {
         gradeSync.sync();
     }
 
     @Override
-    public void syncSubjects() throws NotLoggedInErrorException, IOException, ParseException {
+    public void syncSubjects() throws VulcanException, IOException, ParseException {
         subjectSync.sync();
     }
 
     @Override
-    public void syncTimetable() throws NotLoggedInErrorException, IOException, ParseException {
+    public void syncAttendance() throws ParseException, IOException, VulcanException {
+        attendanceSync.syncAttendance();
+    }
+
+    @Override
+    public void syncAttendance(String date) throws ParseException, IOException, VulcanException {
+        attendanceSync.syncAttendance(date);
+    }
+
+    @Override
+    public void syncTimetable() throws VulcanException, IOException, ParseException {
         timetableSync.syncTimetable();
     }
 
     @Override
-    public void syncTimetable(String date) throws NotLoggedInErrorException, IOException, ParseException {
+    public void syncTimetable(String date) throws VulcanException, IOException, ParseException {
         timetableSync.syncTimetable(date);
     }
 
     @Override
-    public void syncAll() throws NotLoggedInErrorException, IOException, ParseException {
+    public void syncAll() throws VulcanException, IOException, ParseException {
         syncSubjects();
         syncGrades();
+        syncAttendance();
         syncTimetable();
     }
 

app/src/main/java/io/github/wulkanowy/data/RepositoryContract.java

@@ -6,25 +6,36 @@ import java.util.List;
 
 import javax.inject.Singleton;
 
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.VulcanException;
 import io.github.wulkanowy.data.db.dao.entities.Account;
 import io.github.wulkanowy.data.db.dao.entities.Grade;
 import io.github.wulkanowy.data.db.dao.entities.Week;
 import io.github.wulkanowy.data.db.resources.ResourcesContract;
-import io.github.wulkanowy.data.sync.login.LoginSyncContract;
+import io.github.wulkanowy.data.sync.account.AccountSyncContract;
+import io.github.wulkanowy.data.sync.attendance.AttendanceSyncContract;
 import io.github.wulkanowy.data.sync.timetable.TimetableSyncContract;
 
 @Singleton
-public interface RepositoryContract extends ResourcesContract, LoginSyncContract,
+public interface RepositoryContract extends ResourcesContract, AccountSyncContract,
-        TimetableSyncContract {
+        AttendanceSyncContract, TimetableSyncContract {
 
     long getCurrentUserId();
 
-    void syncGrades() throws NotLoggedInErrorException, IOException, ParseException;
+    int getStartupTab();
 
-    void syncSubjects() throws NotLoggedInErrorException, IOException, ParseException;
+    boolean isServicesEnable();
 
-    void syncAll() throws NotLoggedInErrorException, IOException, ParseException;
+    boolean isNotifyEnable();
+
+    int getServicesInterval();
+
+    boolean isMobileDisable();
+
+    void syncGrades() throws VulcanException, IOException, ParseException;
+
+    void syncSubjects() throws VulcanException, IOException, ParseException;
+
+    void syncAll() throws VulcanException, IOException, ParseException;
 
     Account getCurrentUser();
 

app/src/main/java/io/github/wulkanowy/data/db/dao/DbHelper.java

@@ -1,19 +1,61 @@
 package io.github.wulkanowy.data.db.dao;
 
 import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+
+import com.github.yuweiguocn.library.greendao.MigrationHelper;
+
+import org.greenrobot.greendao.database.Database;
+import org.greenrobot.greendao.database.StandardDatabase;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
+import io.github.wulkanowy.BuildConfig;
+import io.github.wulkanowy.data.db.dao.entities.AccountDao;
 import io.github.wulkanowy.data.db.dao.entities.DaoMaster;
+import io.github.wulkanowy.data.db.dao.entities.GradeDao;
+import io.github.wulkanowy.data.db.dao.entities.SubjectDao;
+import io.github.wulkanowy.data.db.shared.SharedPrefContract;
 import io.github.wulkanowy.di.annotations.ApplicationContext;
 import io.github.wulkanowy.di.annotations.DatabaseInfo;
+import io.github.wulkanowy.utils.LogUtils;
 
 @Singleton
-public class DbHelper extends DaoMaster.DevOpenHelper {
+public class DbHelper extends DaoMaster.OpenHelper {
+
+    private SharedPrefContract sharedPref;
 
     @Inject
-    DbHelper(@ApplicationContext Context context, @DatabaseInfo String dbName) {
+    DbHelper(@ApplicationContext Context context, @DatabaseInfo String dbName,
+             SharedPrefContract sharedPref) {
         super(context, dbName);
+        this.sharedPref = sharedPref;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void onUpgrade(Database db, int oldVersion, int newVersion) {
+        MigrationHelper.DEBUG = BuildConfig.DEBUG;
+        MigrationHelper.migrate(db, new MigrationHelper.ReCreateAllTableListener() {
+            @Override
+            public void onCreateAllTables(Database db, boolean ifNotExists) {
+                DaoMaster.createAllTables(db, ifNotExists);
+            }
+            @Override
+            public void onDropAllTables(Database db, boolean ifExists) {
+                DaoMaster.dropAllTables(db, ifExists);
+            }
+        }, AccountDao.class, SubjectDao.class, GradeDao.class);
+    }
+
+    @Override
+    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        Database database = new StandardDatabase(db);
+        DaoMaster.dropAllTables(database, true);
+        onCreate(database);
+        sharedPref.setCurrentUserId(0);
+
+        LogUtils.info("Cleaning user data oldVersion=" + oldVersion + " newVersion=" + newVersion);
     }
 }

app/src/main/java/io/github/wulkanowy/data/db/dao/entities/AttendanceLesson.java

@@ -0,0 +1,254 @@
+package io.github.wulkanowy.data.db.dao.entities;
+
+import org.greenrobot.greendao.DaoException;
+import org.greenrobot.greendao.annotation.Entity;
+import org.greenrobot.greendao.annotation.Generated;
+import org.greenrobot.greendao.annotation.Id;
+import org.greenrobot.greendao.annotation.Index;
+import org.greenrobot.greendao.annotation.Property;
+import org.greenrobot.greendao.annotation.Transient;
+
+import java.io.Serializable;
+
+@Entity(
+        nameInDb = "AttendanceLessons",
+        active = true,
+        indexes = {@Index(value = "dayId,date,number", unique = true)}
+)
+public class AttendanceLesson implements Serializable {
+
+    @Id(autoincrement = true)
+    private Long id;
+
+    @Property(nameInDb = "DAY_ID")
+    private Long dayId;
+
+    @Property(nameInDb = "DATE")
+    private String date = "";
+
+    @Property(nameInDb = "NUMBER_OF_LESSON")
+    private int number = 0;
+
+    @Property(nameInDb = "SUBJECT_NAME")
+    private String subject = "";
+
+    @Property(nameInDb = "IS_PRESENCE")
+    private boolean isPresence = false;
+
+    @Property(nameInDb = "IS_ABSENCE_UNEXCUSED")
+    private boolean isAbsenceUnexcused = false;
+
+    @Property(nameInDb = "IS_ABSENCE_EXCUSED")
+    private boolean isAbsenceExcused = false;
+
+    @Property(nameInDb = "IS_UNEXCUSED_LATENESS")
+    private boolean isUnexcusedLateness = false;
+
+    @Property(nameInDb = "IS_ABSENCE_FOR_SCHOOL_REASONS")
+    private boolean isAbsenceForSchoolReasons = false;
+
+    @Property(nameInDb = "IS_EXCUSED_LATENESS")
+    private boolean isExcusedLateness = false;
+
+    @Property(nameInDb = "IS_EXEMPTION")
+    private boolean isExemption = false;
+
+    @Transient
+    private String description = "";
+
+    private static final long serialVersionUID = 42L;
+
+    /**
+     * Used to resolve relations
+     */
+    @Generated(hash = 2040040024)
+    private transient DaoSession daoSession;
+
+    /**
+     * Used for active entity operations.
+     */
+    @Generated(hash = 1936953859)
+    private transient AttendanceLessonDao myDao;
+
+    @Generated(hash = 1428129046)
+    public AttendanceLesson(Long id, Long dayId, String date, int number,
+                            String subject, boolean isPresence, boolean isAbsenceUnexcused,
+                            boolean isAbsenceExcused, boolean isUnexcusedLateness,
+                            boolean isAbsenceForSchoolReasons, boolean isExcusedLateness,
+                            boolean isExemption) {
+        this.id = id;
+        this.dayId = dayId;
+        this.date = date;
+        this.number = number;
+        this.subject = subject;
+        this.isPresence = isPresence;
+        this.isAbsenceUnexcused = isAbsenceUnexcused;
+        this.isAbsenceExcused = isAbsenceExcused;
+        this.isUnexcusedLateness = isUnexcusedLateness;
+        this.isAbsenceForSchoolReasons = isAbsenceForSchoolReasons;
+        this.isExcusedLateness = isExcusedLateness;
+        this.isExemption = isExemption;
+    }
+
+    @Generated(hash = 921806575)
+    public AttendanceLesson() {
+    }
+
+    public Long getId() {
+        return this.id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public Long getDayId() {
+        return this.dayId;
+    }
+
+    public void setDayId(Long dayId) {
+        this.dayId = dayId;
+    }
+
+    public String getDate() {
+        return this.date;
+    }
+
+    public AttendanceLesson setDate(String date) {
+        this.date = date;
+        return this;
+    }
+
+    public int getNumber() {
+        return this.number;
+    }
+
+    public AttendanceLesson setNumber(int number) {
+        this.number = number;
+        return this;
+    }
+
+    public String getSubject() {
+        return this.subject;
+    }
+
+    public AttendanceLesson setSubject(String subject) {
+        this.subject = subject;
+        return this;
+    }
+
+    public boolean getIsPresence() {
+        return this.isPresence;
+    }
+
+    public AttendanceLesson setIsPresence(boolean isPresence) {
+        this.isPresence = isPresence;
+        return this;
+    }
+
+    public boolean getIsAbsenceUnexcused() {
+        return this.isAbsenceUnexcused;
+    }
+
+    public AttendanceLesson setIsAbsenceUnexcused(boolean isAbsenceUnexcused) {
+        this.isAbsenceUnexcused = isAbsenceUnexcused;
+        return this;
+    }
+
+    public boolean getIsAbsenceExcused() {
+        return this.isAbsenceExcused;
+    }
+
+    public AttendanceLesson setIsAbsenceExcused(boolean isAbsenceExcused) {
+        this.isAbsenceExcused = isAbsenceExcused;
+        return this;
+    }
+
+    public boolean getIsUnexcusedLateness() {
+        return this.isUnexcusedLateness;
+    }
+
+    public AttendanceLesson setIsUnexcusedLateness(boolean isUnexcusedLateness) {
+        this.isUnexcusedLateness = isUnexcusedLateness;
+        return this;
+    }
+
+    public boolean getIsAbsenceForSchoolReasons() {
+        return this.isAbsenceForSchoolReasons;
+    }
+
+    public AttendanceLesson setIsAbsenceForSchoolReasons(boolean isAbsenceForSchoolReasons) {
+        this.isAbsenceForSchoolReasons = isAbsenceForSchoolReasons;
+        return this;
+    }
+
+    public boolean getIsExcusedLateness() {
+        return this.isExcusedLateness;
+    }
+
+    public AttendanceLesson setIsExcusedLateness(boolean isExcusedLateness) {
+        this.isExcusedLateness = isExcusedLateness;
+        return this;
+    }
+
+    public boolean getIsExemption() {
+        return this.isExemption;
+    }
+
+    public AttendanceLesson setIsExemption(boolean isExemption) {
+        this.isExemption = isExemption;
+        return this;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public AttendanceLesson setDescription(String description) {
+        this.description = description;
+        return this;
+    }
+
+    /**
+     * Convenient call for {@link org.greenrobot.greendao.AbstractDao#delete(Object)}.
+     * Entity must attached to an entity context.
+     */
+    @Generated(hash = 128553479)
+    public void delete() {
+        if (myDao == null) {
+            throw new DaoException("Entity is detached from DAO context");
+        }
+        myDao.delete(this);
+    }
+
+    /**
+     * Convenient call for {@link org.greenrobot.greendao.AbstractDao#refresh(Object)}.
+     * Entity must attached to an entity context.
+     */
+    @Generated(hash = 1942392019)
+    public void refresh() {
+        if (myDao == null) {
+            throw new DaoException("Entity is detached from DAO context");
+        }
+        myDao.refresh(this);
+    }
+
+    /**
+     * Convenient call for {@link org.greenrobot.greendao.AbstractDao#update(Object)}.
+     * Entity must attached to an entity context.
+     */
+    @Generated(hash = 713229351)
+    public void update() {
+        if (myDao == null) {
+            throw new DaoException("Entity is detached from DAO context");
+        }
+        myDao.update(this);
+    }
+
+    /** called by internal mechanisms, do not call yourself. */
+    @Generated(hash = 1157101112)
+    public void __setDaoSession(DaoSession daoSession) {
+        this.daoSession = daoSession;
+        myDao = daoSession != null ? daoSession.getAttendanceLessonDao() : null;
+    }
+}

app/src/main/java/io/github/wulkanowy/data/db/dao/entities/Day.java

@@ -5,6 +5,7 @@ import org.greenrobot.greendao.annotation.Entity;
 import org.greenrobot.greendao.annotation.Generated;
 import org.greenrobot.greendao.annotation.Id;
 import org.greenrobot.greendao.annotation.Index;
+import org.greenrobot.greendao.annotation.OrderBy;
 import org.greenrobot.greendao.annotation.Property;
 import org.greenrobot.greendao.annotation.ToMany;
 
@@ -39,7 +40,11 @@ public class Day {
     private String freeDayName = "";
 
     @ToMany(referencedJoinProperty = "dayId")
-    private List<Lesson> lessons;
+    private List<TimetableLesson> timetableLessons;
+
+    @ToMany(referencedJoinProperty = "dayId")
+    @OrderBy("number ASC")
+    private List<AttendanceLesson> attendanceLessons;
 
     /**
      * Used to resolve relations
@@ -113,12 +118,12 @@ public class Day {
         return this;
     }
 
-    public boolean isFreeDay() {
+    public boolean getIsFreeDay() {
-        return isFreeDay;
+        return this.isFreeDay;
     }
 
-    public Day setFreeDay(boolean freeDay) {
+    public Day setIsFreeDay(boolean isFreeDay) {
-        isFreeDay = freeDay;
+        this.isFreeDay = isFreeDay;
         return this;
     }
 
@@ -131,42 +136,62 @@ public class Day {
         return this;
     }
 
-    public boolean getIsFreeDay() {
+    /**
-        return this.isFreeDay;
+     * To-many relationship, resolved on first access (and after reset).
+     * Changes to to-many relations are not persisted, make changes to the target entity.
+     */
+    @Generated(hash = 218588195)
+    public List<TimetableLesson> getTimetableLessons() {
+        if (timetableLessons == null) {
+            final DaoSession daoSession = this.daoSession;
+            if (daoSession == null) {
+                throw new DaoException("Entity is detached from DAO context");
+            }
+            TimetableLessonDao targetDao = daoSession.getTimetableLessonDao();
+            List<TimetableLesson> timetableLessonsNew = targetDao
+                    ._queryDay_TimetableLessons(id);
+            synchronized (this) {
+                if (timetableLessons == null) {
+                    timetableLessons = timetableLessonsNew;
+                }
+            }
+        }
+        return timetableLessons;
     }
 
-    public void setIsFreeDay(boolean isFreeDay) {
+    /** Resets a to-many relationship, making the next get call to query for a fresh result. */
-        this.isFreeDay = isFreeDay;
+    @Generated(hash = 1687683740)
+    public synchronized void resetTimetableLessons() {
+        timetableLessons = null;
     }
 
     /**
      * To-many relationship, resolved on first access (and after reset).
      * Changes to to-many relations are not persisted, make changes to the target entity.
      */
-    @Generated(hash = 1552857303)
+    @Generated(hash = 1166820581)
-    public List<Lesson> getLessons() {
+    public List<AttendanceLesson> getAttendanceLessons() {
-        if (lessons == null) {
+        if (attendanceLessons == null) {
             final DaoSession daoSession = this.daoSession;
             if (daoSession == null) {
                 throw new DaoException("Entity is detached from DAO context");
             }
-            LessonDao targetDao = daoSession.getLessonDao();
+            AttendanceLessonDao targetDao = daoSession.getAttendanceLessonDao();
-            List<Lesson> lessonsNew = targetDao._queryDay_Lessons(id);
+            List<AttendanceLesson> attendanceLessonsNew = targetDao
+                    ._queryDay_AttendanceLessons(id);
             synchronized (this) {
-                if (lessons == null) {
+                if (attendanceLessons == null) {
-                    lessons = lessonsNew;
+                    attendanceLessons = attendanceLessonsNew;
                 }
             }
         }
-        return lessons;
+        return attendanceLessons;
     }
 
-    /**
+    /** Resets a to-many relationship, making the next get call to query for a fresh result. */
-     * Resets a to-many relationship, making the next get call to query for a fresh result.
+    @Generated(hash = 1343075564)
-     */
+    public synchronized void resetAttendanceLessons() {
-    @Generated(hash = 1769801440)
+        attendanceLessons = null;
-    public synchronized void resetLessons() {
-        lessons = null;
     }
 
     /**

app/src/main/java/io/github/wulkanowy/data/db/dao/entities/TimetableLesson.java

@@ -10,11 +10,11 @@ import org.greenrobot.greendao.annotation.Property;
 import java.io.Serializable;
 
 @Entity(
-        nameInDb = "Lessons",
+        nameInDb = "TimetableLessons",
         active = true,
         indexes = {@Index(value = "dayId,date,startTime,endTime", unique = true)}
 )
-public class Lesson implements Serializable {
+public class TimetableLesson implements Serializable {
 
     @Id(autoincrement = true)
     private Long id;
@@ -78,13 +78,14 @@ public class Lesson implements Serializable {
     /**
      * Used for active entity operations.
      */
-    @Generated(hash = 610143130)
+    @Generated(hash = 1119360138)
-    private transient LessonDao myDao;
+    private transient TimetableLessonDao myDao;
 
-    @Generated(hash = 140778287)
+    @Generated(hash = 627457324)
-    public Lesson(Long id, Long dayId, String number, String subject, String teacher, String room,
+    public TimetableLesson(Long id, Long dayId, String number, String subject,
-                  String description, String groupName, String startTime, String endTime, String date,
+                           String teacher, String room, String description, String groupName,
-                  boolean isEmpty, boolean isDivisionIntoGroups, boolean isPlanning, boolean isRealized,
+                           String startTime, String endTime, String date, boolean isEmpty,
+                           boolean isDivisionIntoGroups, boolean isPlanning, boolean isRealized,
                            boolean isMovedOrCanceled, boolean isNewMovedInOrChanged) {
         this.id = id;
         this.dayId = dayId;
@@ -105,8 +106,8 @@ public class Lesson implements Serializable {
         this.isNewMovedInOrChanged = isNewMovedInOrChanged;
     }
 
-    @Generated(hash = 1669664117)
+    @Generated(hash = 1878030142)
-    public Lesson() {
+    public TimetableLesson() {
     }
 
     public Long getId() {
@@ -126,186 +127,138 @@ public class Lesson implements Serializable {
     }
 
     public String getNumber() {
-        return number;
+        return this.number;
     }
 
-    public Lesson setNumber(String number) {
+    public TimetableLesson setNumber(String number) {
         this.number = number;
         return this;
     }
 
     public String getSubject() {
-        return subject;
+        return this.subject;
     }
 
-    public Lesson setSubject(String subject) {
+    public TimetableLesson setSubject(String subject) {
         this.subject = subject;
         return this;
     }
 
     public String getTeacher() {
-        return teacher;
+        return this.teacher;
     }
 
-    public Lesson setTeacher(String teacher) {
+    public TimetableLesson setTeacher(String teacher) {
         this.teacher = teacher;
         return this;
     }
 
     public String getRoom() {
-        return room;
+        return this.room;
     }
 
-    public Lesson setRoom(String room) {
+    public TimetableLesson setRoom(String room) {
         this.room = room;
         return this;
     }
 
     public String getDescription() {
-        return description;
+        return this.description;
     }
 
-    public Lesson setDescription(String description) {
+    public TimetableLesson setDescription(String description) {
         this.description = description;
         return this;
     }
 
     public String getGroupName() {
-        return groupName;
+        return this.groupName;
     }
 
-    public Lesson setGroupName(String groupName) {
+    public TimetableLesson setGroupName(String groupName) {
         this.groupName = groupName;
         return this;
     }
 
     public String getStartTime() {
-        return startTime;
+        return this.startTime;
     }
 
-    public Lesson setStartTime(String startTime) {
+    public TimetableLesson setStartTime(String startTime) {
         this.startTime = startTime;
         return this;
     }
 
     public String getEndTime() {
-        return endTime;
+        return this.endTime;
     }
 
-    public Lesson setEndTime(String endTime) {
+    public TimetableLesson setEndTime(String endTime) {
         this.endTime = endTime;
         return this;
     }
 
     public String getDate() {
-        return date;
+        return this.date;
     }
 
-    public Lesson setDate(String date) {
+    public TimetableLesson setDate(String date) {
         this.date = date;
         return this;
     }
 
-    public boolean isEmpty() {
-        return isEmpty;
-    }
-
-    public Lesson setEmpty(boolean empty) {
-        isEmpty = empty;
-        return this;
-    }
-
-    public boolean isDivisionIntoGroups() {
-        return isDivisionIntoGroups;
-    }
-
-    public Lesson setDivisionIntoGroups(boolean divisionIntoGroups) {
-        isDivisionIntoGroups = divisionIntoGroups;
-        return this;
-    }
-
-    public boolean isPlanning() {
-        return isPlanning;
-    }
-
-    public Lesson setPlanning(boolean planning) {
-        isPlanning = planning;
-        return this;
-    }
-
-    public boolean isRealized() {
-        return isRealized;
-    }
-
-    public Lesson setRealized(boolean realized) {
-        isRealized = realized;
-        return this;
-    }
-
-    public boolean isMovedOrCanceled() {
-        return isMovedOrCanceled;
-    }
-
-    public Lesson setMovedOrCanceled(boolean movedOrCanceled) {
-        isMovedOrCanceled = movedOrCanceled;
-        return this;
-    }
-
-    public boolean isNewMovedInOrChanged() {
-        return isNewMovedInOrChanged;
-    }
-
-    public Lesson setNewMovedInOrChanged(boolean newMovedInOrChanged) {
-        isNewMovedInOrChanged = newMovedInOrChanged;
-        return this;
-    }
-
     public boolean getIsEmpty() {
         return this.isEmpty;
     }
 
-    public void setIsEmpty(boolean isEmpty) {
+    public TimetableLesson setEmpty(boolean isEmpty) {
         this.isEmpty = isEmpty;
+        return this;
     }
 
     public boolean getIsDivisionIntoGroups() {
         return this.isDivisionIntoGroups;
     }
 
-    public void setIsDivisionIntoGroups(boolean isDivisionIntoGroups) {
+    public TimetableLesson setDivisionIntoGroups(boolean isDivisionIntoGroups) {
         this.isDivisionIntoGroups = isDivisionIntoGroups;
+        return this;
     }
 
     public boolean getIsPlanning() {
         return this.isPlanning;
     }
 
-    public void setIsPlanning(boolean isPlanning) {
+    public TimetableLesson setPlanning(boolean isPlanning) {
         this.isPlanning = isPlanning;
+        return this;
     }
 
     public boolean getIsRealized() {
         return this.isRealized;
     }
 
-    public void setIsRealized(boolean isRealized) {
+    public TimetableLesson setRealized(boolean isRealized) {
         this.isRealized = isRealized;
+        return this;
     }
 
     public boolean getIsMovedOrCanceled() {
         return this.isMovedOrCanceled;
     }
 
-    public void setIsMovedOrCanceled(boolean isMovedOrCanceled) {
+    public TimetableLesson setMovedOrCanceled(boolean isMovedOrCanceled) {
         this.isMovedOrCanceled = isMovedOrCanceled;
+        return this;
     }
 
     public boolean getIsNewMovedInOrChanged() {
         return this.isNewMovedInOrChanged;
     }
 
-    public void setIsNewMovedInOrChanged(boolean isNewMovedInOrChanged) {
+    public TimetableLesson setNewMovedInOrChanged(boolean isNewMovedInOrChanged) {
         this.isNewMovedInOrChanged = isNewMovedInOrChanged;
+        return this;
     }
 
     /**
@@ -344,10 +297,34 @@ public class Lesson implements Serializable {
         myDao.update(this);
     }
 
+    public void setIsEmpty(boolean isEmpty) {
+        this.isEmpty = isEmpty;
+    }
+
+    public void setIsDivisionIntoGroups(boolean isDivisionIntoGroups) {
+        this.isDivisionIntoGroups = isDivisionIntoGroups;
+    }
+
+    public void setIsPlanning(boolean isPlanning) {
+        this.isPlanning = isPlanning;
+    }
+
+    public void setIsRealized(boolean isRealized) {
+        this.isRealized = isRealized;
+    }
+
+    public void setIsMovedOrCanceled(boolean isMovedOrCanceled) {
+        this.isMovedOrCanceled = isMovedOrCanceled;
+    }
+
+    public void setIsNewMovedInOrChanged(boolean isNewMovedInOrChanged) {
+        this.isNewMovedInOrChanged = isNewMovedInOrChanged;
+    }
+
     /** called by internal mechanisms, do not call yourself. */
-    @Generated(hash = 2078826279)
+    @Generated(hash = 1885258429)
     public void __setDaoSession(DaoSession daoSession) {
         this.daoSession = daoSession;
-        myDao = daoSession != null ? daoSession.getLessonDao() : null;
+        myDao = daoSession != null ? daoSession.getTimetableLessonDao() : null;
     }
 }

app/src/main/java/io/github/wulkanowy/data/db/dao/entities/Week.java

@@ -26,6 +26,12 @@ public class Week {
     @Property(nameInDb = "START_DATE")
     private String startDayDate = "";
 
+    @Property(nameInDb = "IS_ATTENDANCE_SYNCED")
+    private boolean isAttendanceSynced = false;
+
+    @Property(nameInDb = "IS_TIMETABLE_SYNCED")
+    private boolean isTimetableSynced = false;
+
     @ToMany(referencedJoinProperty = "weekId")
     private List<Day> dayList;
 
@@ -37,11 +43,14 @@ public class Week {
     @Generated(hash = 1019310398)
     private transient WeekDao myDao;
 
-    @Generated(hash = 36829814)
+    @Generated(hash = 1745118398)
-    public Week(Long id, Long userId, String startDayDate) {
+    public Week(Long id, Long userId, String startDayDate, boolean isAttendanceSynced,
+            boolean isTimetableSynced) {
         this.id = id;
         this.userId = userId;
         this.startDayDate = startDayDate;
+        this.isAttendanceSynced = isAttendanceSynced;
+        this.isTimetableSynced = isTimetableSynced;
     }
 
     @Generated(hash = 2135529658)
@@ -75,6 +84,22 @@ public class Week {
         return this;
     }
 
+    public boolean getIsAttendanceSynced() {
+        return this.isAttendanceSynced;
+    }
+
+    public void setIsAttendanceSynced(boolean isAttendanceSynced) {
+        this.isAttendanceSynced = isAttendanceSynced;
+    }
+
+    public boolean getIsTimetableSynced() {
+        return this.isTimetableSynced;
+    }
+
+    public void setIsTimetableSynced(boolean isTimetableSynced) {
+        this.isTimetableSynced = isTimetableSynced;
+    }
+
     /**
      * To-many relationship, resolved on first access (and after reset).
      * Changes to to-many relations are not persisted, make changes to the target entity.

app/src/main/java/io/github/wulkanowy/data/db/resources/AppResources.java

@@ -3,6 +3,8 @@ package io.github.wulkanowy.data.db.resources;
 import android.content.Context;
 import android.content.res.Resources;
 
+import com.crashlytics.android.Crashlytics;
+
 import java.io.IOException;
 import java.net.SocketTimeoutException;
 import java.net.UnknownHostException;
@@ -11,8 +13,8 @@ import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import io.github.wulkanowy.R;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.NotLoggedInErrorException;
-import io.github.wulkanowy.api.login.VulcanOfflineException;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
 import io.github.wulkanowy.di.annotations.ApplicationContext;
 import io.github.wulkanowy.utils.AppConstant;
 import io.github.wulkanowy.utils.LogUtils;
@@ -41,6 +43,7 @@ public class AppResources implements ResourcesContract {
     @Override
     public String getErrorLoginMessage(Exception exception) {
         LogUtils.error(AppConstant.APP_NAME + " encountered a error", exception);
+        Crashlytics.logException(exception);
 
         if (exception instanceof CryptoException) {
             return resources.getString(R.string.encrypt_failed_text);
@@ -50,10 +53,39 @@ public class AppResources implements ResourcesContract {
             return resources.getString(R.string.generic_timeout_error);
         } else if (exception instanceof NotLoggedInErrorException || exception instanceof IOException) {
             return resources.getString(R.string.login_denied_text);
-        } else if (exception instanceof VulcanOfflineException) {
-            return resources.getString(R.string.error_host_offline);
         } else {
             return exception.getMessage();
         }
     }
+
+    @Override
+    public String getAttendanceLessonDescription(AttendanceLesson lesson) {
+        int id = R.string.attendance_present;
+
+        if (lesson.getIsAbsenceForSchoolReasons()) {
+            id = R.string.attendance_absence_for_school_reasons;
+        }
+
+        if (lesson.getIsAbsenceExcused()) {
+            id = R.string.attendance_absence_excused;
+        }
+
+        if (lesson.getIsAbsenceUnexcused()) {
+            id = R.string.attendance_absence_unexcused;
+        }
+
+        if (lesson.getIsExemption()) {
+            id = R.string.attendance_exemption;
+        }
+
+        if (lesson.getIsExcusedLateness()) {
+            id = R.string.attendance_excused_lateness;
+        }
+
+        if (lesson.getIsUnexcusedLateness()) {
+            id = R.string.attendance_unexcused_lateness;
+        }
+
+        return resources.getString(id);
+    }
 }

app/src/main/java/io/github/wulkanowy/data/db/resources/ResourcesContract.java

@@ -1,5 +1,7 @@
 package io.github.wulkanowy.data.db.resources;
 
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
+
 public interface ResourcesContract {
 
     String[] getSymbolsKeysArray();
@@ -7,4 +9,6 @@ public interface ResourcesContract {
     String[] getSymbolsValuesArray();
 
     String getErrorLoginMessage(Exception e);
+
+    String getAttendanceLessonDescription(AttendanceLesson lesson);
 }

app/src/main/java/io/github/wulkanowy/data/db/shared/SharedPref.java

@@ -2,32 +2,62 @@ package io.github.wulkanowy.data.db.shared;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import io.github.wulkanowy.di.annotations.ApplicationContext;
 import io.github.wulkanowy.di.annotations.SharedPreferencesInfo;
+import io.github.wulkanowy.ui.main.settings.SettingsFragment;
 
 @Singleton
 public class SharedPref implements SharedPrefContract {
 
     private static final String SHARED_KEY_USER_ID = "USER_ID";
 
-    private final SharedPreferences sharedPreferences;
+    private final SharedPreferences appSharedPref;
+
+    private final SharedPreferences settingsSharedPref;
 
     @Inject
     SharedPref(@ApplicationContext Context context, @SharedPreferencesInfo String sharedName) {
-        sharedPreferences = context.getSharedPreferences(sharedName, Context.MODE_PRIVATE);
+        appSharedPref = context.getSharedPreferences(sharedName, Context.MODE_PRIVATE);
+        settingsSharedPref = PreferenceManager.getDefaultSharedPreferences(context);
     }
 
     @Override
     public long getCurrentUserId() {
-        return sharedPreferences.getLong(SHARED_KEY_USER_ID, 0);
+        return appSharedPref.getLong(SHARED_KEY_USER_ID, 0);
     }
 
     @Override
     public void setCurrentUserId(long userId) {
-        sharedPreferences.edit().putLong(SHARED_KEY_USER_ID, userId).apply();
+        appSharedPref.edit().putLong(SHARED_KEY_USER_ID, userId).apply();
+    }
+
+    @Override
+    public int getStartupTab() {
+        return Integer.parseInt(settingsSharedPref.getString(SettingsFragment.SHARED_KEY_START_TAB, "2"));
+    }
+
+    @Override
+    public int getServicesInterval() {
+        return Integer.parseInt(settingsSharedPref.getString(SettingsFragment.SHARED_KEY_SERVICES_INTERVAL, "60"));
+    }
+
+    @Override
+    public boolean isServicesEnable() {
+        return settingsSharedPref.getBoolean(SettingsFragment.SHARED_KEY_SERVICES_ENABLE, true);
+    }
+
+    @Override
+    public boolean isNotifyEnable() {
+        return settingsSharedPref.getBoolean(SettingsFragment.SHARED_KEY_NOTIFY_ENABLE, true);
+    }
+
+    @Override
+    public boolean isMobileDisable() {
+        return settingsSharedPref.getBoolean(SettingsFragment.SHARED_KEY_SERVICES_MOBILE_DISABLED, false);
     }
 }

app/src/main/java/io/github/wulkanowy/data/db/shared/SharedPrefContract.java

@@ -5,4 +5,14 @@ public interface SharedPrefContract {
     long getCurrentUserId();
 
     void setCurrentUserId(long userId);
+
+    int getStartupTab();
+
+    int getServicesInterval();
+
+    boolean isMobileDisable();
+
+    boolean isServicesEnable();
+
+    boolean isNotifyEnable();
 }

app/src/main/java/io/github/wulkanowy/data/sync/SyncContract.java

@@ -3,9 +3,9 @@ package io.github.wulkanowy.data.sync;
 import java.io.IOException;
 import java.text.ParseException;
 
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.VulcanException;
 
 public interface SyncContract {
 
-    void sync() throws NotLoggedInErrorException, IOException, ParseException;
+    void sync() throws VulcanException, IOException, ParseException;
 }

app/src/main/java/io/github/wulkanowy/data/sync/account/AccountSync.java

@@ -1,4 +1,4 @@
-package io.github.wulkanowy.data.sync.login;
+package io.github.wulkanowy.data.sync.account;
 
 import android.content.Context;
 
@@ -8,10 +8,7 @@ import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import io.github.wulkanowy.api.Vulcan;
-import io.github.wulkanowy.api.login.AccountPermissionException;
+import io.github.wulkanowy.api.VulcanException;
-import io.github.wulkanowy.api.login.BadCredentialsException;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
-import io.github.wulkanowy.api.login.VulcanOfflineException;
 import io.github.wulkanowy.data.db.dao.entities.Account;
 import io.github.wulkanowy.data.db.dao.entities.DaoSession;
 import io.github.wulkanowy.data.db.shared.SharedPrefContract;
@@ -21,7 +18,7 @@ import io.github.wulkanowy.utils.security.CryptoException;
 import io.github.wulkanowy.utils.security.Scrambler;
 
 @Singleton
-public class LoginSync implements LoginSyncContract {
+public class AccountSync implements AccountSyncContract {
 
     private final DaoSession daoSession;
 
@@ -32,7 +29,7 @@ public class LoginSync implements LoginSyncContract {
     private final Context context;
 
     @Inject
-    LoginSync(DaoSession daoSession, SharedPrefContract sharedPref,
+    AccountSync(DaoSession daoSession, SharedPrefContract sharedPref,
                 Vulcan vulcan, @ApplicationContext Context context) {
         this.daoSession = daoSession;
         this.sharedPref = sharedPref;
@@ -41,13 +38,12 @@ public class LoginSync implements LoginSyncContract {
     }
 
     @Override
-    public void loginUser(String email, String password, String symbol)
+    public void registerUser(String email, String password, String symbol)
-            throws NotLoggedInErrorException, AccountPermissionException, IOException,
+            throws VulcanException, IOException, CryptoException {
-            CryptoException, VulcanOfflineException, BadCredentialsException {
 
-        LogUtils.debug("Login new user email=" + email);
+        LogUtils.debug("Register new user email=" + email);
 
-        vulcan.login(email, password, symbol);
+        vulcan.setCredentials(email, password, symbol, null);
 
         Account account = new Account()
                 .setName(vulcan.getBasicInformation().getPersonalData().getFirstAndLastName())
@@ -56,24 +52,25 @@ public class LoginSync implements LoginSyncContract {
                 .setSymbol(vulcan.getSymbol())
                 .setSnpId(vulcan.getStudentAndParent().getId());
 
-        sharedPref.setCurrentUserId(daoSession.getAccountDao().insert(account));
+        daoSession.getAccountDao().insert(account);
+
+        sharedPref.setCurrentUserId(account.getId());
     }
 
     @Override
-    public void loginCurrentUser() throws NotLoggedInErrorException, AccountPermissionException,
+    public void initLastUser() throws VulcanException, IOException, CryptoException {
-            IOException, CryptoException, VulcanOfflineException, BadCredentialsException {
 
         long userId = sharedPref.getCurrentUserId();
 
         if (userId == 0) {
-            throw new IOException("Can't find logged user");
+            throw new IOException("Can't find saved user");
         }
 
-        LogUtils.debug("Login current user id=" + userId);
+        LogUtils.debug("Initialization current user id=" + userId);
 
         Account account = daoSession.getAccountDao().load(userId);
 
-        vulcan.login(account.getEmail(),
+        vulcan.setCredentials(account.getEmail(),
                 Scrambler.decrypt(account.getEmail(), account.getPassword()),
                 account.getSymbol(),
                 account.getSnpId());

app/src/main/java/io/github/wulkanowy/data/sync/account/AccountSyncContract.java

@@ -0,0 +1,16 @@
+package io.github.wulkanowy.data.sync.account;
+
+import java.io.IOException;
+
+import io.github.wulkanowy.api.VulcanException;
+import io.github.wulkanowy.utils.security.CryptoException;
+
+public interface AccountSyncContract {
+
+    void registerUser(String email, String password, String symbol)
+            throws VulcanException, IOException,
+            CryptoException;
+
+    void initLastUser() throws VulcanException, IOException,
+            CryptoException;
+}

app/src/main/java/io/github/wulkanowy/data/sync/attendance/AttendanceSync.java

@@ -0,0 +1,156 @@
+package io.github.wulkanowy.data.sync.attendance;
+
+import java.io.IOException;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+
+import io.github.wulkanowy.api.Vulcan;
+import io.github.wulkanowy.api.VulcanException;
+import io.github.wulkanowy.api.generic.Lesson;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLessonDao;
+import io.github.wulkanowy.data.db.dao.entities.DaoSession;
+import io.github.wulkanowy.data.db.dao.entities.Day;
+import io.github.wulkanowy.data.db.dao.entities.DayDao;
+import io.github.wulkanowy.data.db.dao.entities.Week;
+import io.github.wulkanowy.data.db.dao.entities.WeekDao;
+import io.github.wulkanowy.data.db.shared.SharedPrefContract;
+import io.github.wulkanowy.utils.DataObjectConverter;
+import io.github.wulkanowy.utils.LogUtils;
+import io.github.wulkanowy.utils.TimeUtils;
+
+@Singleton
+public class AttendanceSync implements AttendanceSyncContract {
+
+    private final DaoSession daoSession;
+
+    private final SharedPrefContract sharedPref;
+
+    private final Vulcan vulcan;
+
+    private long userId;
+
+    @Inject
+    AttendanceSync(DaoSession daoSession, SharedPrefContract sharedPref, Vulcan vulcan) {
+        this.daoSession = daoSession;
+        this.sharedPref = sharedPref;
+        this.vulcan = vulcan;
+    }
+
+    @Override
+    public void syncAttendance() throws IOException, ParseException, VulcanException {
+        syncAttendance(null);
+    }
+
+    @Override
+    public void syncAttendance(String date) throws IOException, ParseException, VulcanException {
+        this.userId = sharedPref.getCurrentUserId();
+
+        io.github.wulkanowy.api.generic.Week<io.github.wulkanowy.api.generic.Day> weekApi = getWeekFromApi(getNormalizedDate(date));
+        Week weekDb = getWeekFromDb(weekApi.getStartDayDate());
+
+        long weekId = updateWeekInDb(weekDb, weekApi);
+
+        List<AttendanceLesson> lessonList = updateDays(weekApi.getDays(), weekId);
+
+        daoSession.getAttendanceLessonDao().saveInTx(lessonList);
+
+        LogUtils.debug("Synchronization attendance lessons (amount = " + lessonList.size() + ")");
+    }
+
+    private String getNormalizedDate(String date) throws ParseException {
+        return null != date ? String.valueOf(TimeUtils.getNetTicks(date)) : "";
+    }
+
+    private io.github.wulkanowy.api.generic.Week<io.github.wulkanowy.api.generic.Day> getWeekFromApi(String date)
+            throws IOException, ParseException, VulcanException {
+        return vulcan.getAttendanceTable().getWeekTable(date);
+    }
+
+    private Week getWeekFromDb(String date) {
+        return daoSession.getWeekDao()
+                .queryBuilder()
+                .where(WeekDao.Properties.UserId.eq(userId), WeekDao.Properties.StartDayDate.eq(date))
+                .unique();
+    }
+
+    private Long updateWeekInDb(Week dbWeekEntity, io.github.wulkanowy.api.generic.Week fromApi) {
+        if (dbWeekEntity != null) {
+            dbWeekEntity.setIsAttendanceSynced(true);
+            dbWeekEntity.update();
+
+            return dbWeekEntity.getId();
+        }
+
+        Week apiWeekEntity = DataObjectConverter.weekToWeekEntity(fromApi).setUserId(userId);
+        apiWeekEntity.setIsAttendanceSynced(true);
+
+        return daoSession.getWeekDao().insert(apiWeekEntity);
+    }
+
+    private List<AttendanceLesson> updateDays(List<io.github.wulkanowy.api.generic.Day> dayListFromApi, long weekId) {
+        List<AttendanceLesson> updatedLessonList = new ArrayList<>();
+
+        for (io.github.wulkanowy.api.generic.Day dayFromApi : dayListFromApi) {
+
+            Day dbDayEntity = getDayFromDb(dayFromApi.getDate());
+
+            Day apiDayEntity = DataObjectConverter.dayToDayEntity(dayFromApi);
+
+            long dayId = updateDay(dbDayEntity, apiDayEntity, weekId);
+
+            updateLessons(dayFromApi.getLessons(), updatedLessonList, dayId);
+        }
+
+        return updatedLessonList;
+    }
+
+    private Day getDayFromDb(String date) {
+        return daoSession.getDayDao()
+                .queryBuilder()
+                .where(DayDao.Properties.UserId.eq(userId), DayDao.Properties.Date.eq(date))
+                .unique();
+    }
+
+    private long updateDay(Day dbDayEntity, Day apiDayEntity, long weekId) {
+        if (null != dbDayEntity) {
+            return dbDayEntity.getId();
+        }
+
+        apiDayEntity.setUserId(userId);
+        apiDayEntity.setWeekId(weekId);
+
+        return daoSession.getDayDao().insert(apiDayEntity);
+    }
+
+    private void updateLessons(List<Lesson> lessons, List<AttendanceLesson> updatedLessons, long dayId) {
+        List<AttendanceLesson> lessonsFromApiEntities = DataObjectConverter
+                .lessonsToAttendanceLessonsEntities(lessons);
+
+        for (AttendanceLesson apiLessonEntity : lessonsFromApiEntities) {
+            AttendanceLesson lessonFromDb = getLessonFromDb(apiLessonEntity, dayId);
+
+            apiLessonEntity.setDayId(dayId);
+
+            if (lessonFromDb != null) {
+                apiLessonEntity.setId(lessonFromDb.getId());
+            }
+
+            if (!"".equals(apiLessonEntity.getSubject())) {
+                updatedLessons.add(apiLessonEntity);
+            }
+        }
+    }
+
+    private AttendanceLesson getLessonFromDb(AttendanceLesson apiEntity, long dayId) {
+        return daoSession.getAttendanceLessonDao().queryBuilder()
+                .where(AttendanceLessonDao.Properties.DayId.eq(dayId),
+                        AttendanceLessonDao.Properties.Date.eq(apiEntity.getDate()),
+                        AttendanceLessonDao.Properties.Number.eq(apiEntity.getNumber()))
+                .unique();
+    }
+}

app/src/main/java/io/github/wulkanowy/data/sync/attendance/AttendanceSyncContract.java

@@ -0,0 +1,13 @@
+package io.github.wulkanowy.data.sync.attendance;
+
+import java.io.IOException;
+import java.text.ParseException;
+
+import io.github.wulkanowy.api.VulcanException;
+
+public interface AttendanceSyncContract {
+
+    void syncAttendance(String date) throws IOException, ParseException, VulcanException;
+
+    void syncAttendance() throws IOException, ParseException, VulcanException;
+}

app/src/main/java/io/github/wulkanowy/data/sync/grades/GradeSync.java

@@ -9,7 +9,7 @@ import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import io.github.wulkanowy.api.Vulcan;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.VulcanException;
 import io.github.wulkanowy.data.db.dao.entities.Account;
 import io.github.wulkanowy.data.db.dao.entities.DaoSession;
 import io.github.wulkanowy.data.db.dao.entities.Grade;
@@ -29,6 +29,8 @@ public class GradeSync implements SyncContract {
 
     private final SharedPrefContract sharedPref;
 
+    private Long userId;
+
     @Inject
     GradeSync(DaoSession daoSession, SharedPrefContract sharedPref, Vulcan vulcan) {
         this.daoSession = daoSession;
@@ -37,36 +39,53 @@ public class GradeSync implements SyncContract {
     }
 
     @Override
-    public void sync() throws IOException, NotLoggedInErrorException, ParseException {
+    public void sync() throws IOException, VulcanException, ParseException {
 
-        long userId = sharedPref.getCurrentUserId();
+        userId = sharedPref.getCurrentUserId();
 
         Account account = daoSession.getAccountDao().load(userId);
-        account.resetGradeList();
+        resetAccountRelations(account);
-        account.resetSubjectList();
 
-        List<Grade> gradesFromNet = DataObjectConverter
+        List<Grade> lastList = getUpdatedList(getComparedList(account));
-                .gradesToGradeEntities(vulcan.getGradesList().getAll());
-        List<Grade> gradesFromDb = account.getGradeList();
-
-        List<Grade> updatedGrades = EntitiesCompare.compareGradeList(gradesFromNet, gradesFromDb);
-
-        daoSession.getGradeDao().deleteInTx(gradesFromDb);
-
-        List<Grade> lastList = new ArrayList<>();
-
-        for (Grade grade : updatedGrades) {
-            grade.setUserId(userId);
-            grade.setSubjectId(daoSession.getSubjectDao().queryBuilder()
-                    .where(SubjectDao.Properties.Name.eq(grade.getSubject()),
-                            SubjectDao.Properties.UserId.eq(userId))
-                    .build()
-                    .uniqueOrThrow().getId());
-            lastList.add(grade);
-        }
 
+        daoSession.getGradeDao().deleteInTx(account.getGradeList());
         daoSession.getGradeDao().insertInTx(lastList);
 
         LogUtils.debug("Synchronization grades (amount = " + lastList.size() + ")");
     }
+
+    private void resetAccountRelations(Account account) {
+        account.resetSubjectList();
+        account.resetGradeList();
+    }
+
+    private List<Grade> getUpdatedList(List<Grade> comparedList) {
+        List<Grade> updatedList = new ArrayList<>();
+
+        for (Grade grade : comparedList) {
+            grade.setUserId(userId);
+            grade.setSubjectId(getSubjectId(grade.getSubject()));
+            updatedList.add(grade);
+        }
+        return updatedList;
+    }
+
+    private List<Grade> getComparedList(Account account) throws IOException, VulcanException,
+            ParseException {
+        List<Grade> gradesFromNet = DataObjectConverter
+                .gradesToGradeEntities(vulcan.getGradesList().getAll());
+
+        List<Grade> gradesFromDb = account.getGradeList();
+
+        return EntitiesCompare.compareGradeList(gradesFromNet, gradesFromDb);
+    }
+
+    private Long getSubjectId(String subjectName) {
+        return daoSession.getSubjectDao().queryBuilder()
+                .where(SubjectDao.Properties.Name.eq(subjectName),
+                        SubjectDao.Properties.UserId.eq(userId))
+                .build()
+                .uniqueOrThrow()
+                .getId();
+    }
 }

app/src/main/java/io/github/wulkanowy/data/sync/login/LoginSyncContract.java

@@ -1,19 +0,0 @@
-package io.github.wulkanowy.data.sync.login;
-
-import java.io.IOException;
-
-import io.github.wulkanowy.api.login.AccountPermissionException;
-import io.github.wulkanowy.api.login.BadCredentialsException;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
-import io.github.wulkanowy.api.login.VulcanOfflineException;
-import io.github.wulkanowy.utils.security.CryptoException;
-
-public interface LoginSyncContract {
-
-    void loginUser(String email, String password, String symbol)
-            throws NotLoggedInErrorException, AccountPermissionException, IOException,
-            CryptoException, VulcanOfflineException, BadCredentialsException;
-
-    void loginCurrentUser() throws NotLoggedInErrorException, AccountPermissionException, IOException,
-            CryptoException, VulcanOfflineException, BadCredentialsException;
-}

app/src/main/java/io/github/wulkanowy/data/sync/subjects/SubjectSync.java

@@ -9,10 +9,10 @@ import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import io.github.wulkanowy.api.Vulcan;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.VulcanException;
+import io.github.wulkanowy.data.db.dao.entities.Account;
 import io.github.wulkanowy.data.db.dao.entities.DaoSession;
 import io.github.wulkanowy.data.db.dao.entities.Subject;
-import io.github.wulkanowy.data.db.dao.entities.SubjectDao;
 import io.github.wulkanowy.data.db.shared.SharedPrefContract;
 import io.github.wulkanowy.data.sync.SyncContract;
 import io.github.wulkanowy.utils.DataObjectConverter;
@@ -21,41 +21,51 @@ import io.github.wulkanowy.utils.LogUtils;
 @Singleton
 public class SubjectSync implements SyncContract {
 
-    private final SubjectDao subjectDao;
+    private final DaoSession daoSession;
 
     private final Vulcan vulcan;
 
     private final SharedPrefContract sharedPref;
 
+    private Long userId;
+
     @Inject
     SubjectSync(DaoSession daoSession, SharedPrefContract sharedPref, Vulcan vulcan) {
-        this.subjectDao = daoSession.getSubjectDao();
+        this.daoSession = daoSession;
         this.sharedPref = sharedPref;
         this.vulcan = vulcan;
     }
 
     @Override
-    public void sync() throws NotLoggedInErrorException, IOException, ParseException {
+    public void sync() throws VulcanException, IOException, ParseException {
 
-        long userId = sharedPref.getCurrentUserId();
+        userId = sharedPref.getCurrentUserId();
 
-        List<Subject> subjectsFromNet = DataObjectConverter
+        List<Subject> lastList = getUpdatedList(getSubjectsFromNet());
-                .subjectsToSubjectEntities(vulcan.getSubjectsList().getAll());
 
-        subjectDao.deleteInTx(subjectDao.queryBuilder()
+        daoSession.getSubjectDao().deleteInTx(getSubjectsFromDb());
-                .where(SubjectDao.Properties.UserId.eq(userId))
+        daoSession.getSubjectDao().insertInTx(lastList);
-                .build()
-                .list());
-
-        List<Subject> lastList = new ArrayList<>();
-
-        for (Subject subject : subjectsFromNet) {
-            subject.setUserId(userId);
-            lastList.add(subject);
-        }
-
-        subjectDao.insertInTx(lastList);
 
         LogUtils.debug("Synchronization subjects (amount = " + lastList.size() + ")");
     }
+
+    private List<Subject> getSubjectsFromNet() throws VulcanException, IOException {
+        return DataObjectConverter.subjectsToSubjectEntities(vulcan.getSubjectsList().getAll());
+    }
+
+    private List<Subject> getSubjectsFromDb() {
+        Account account = daoSession.getAccountDao().load(userId);
+        account.resetSubjectList();
+        return account.getSubjectList();
+    }
+
+    private List<Subject> getUpdatedList(List<Subject> subjectsFromNet) {
+        List<Subject> updatedList = new ArrayList<>();
+
+        for (Subject subject : subjectsFromNet) {
+            subject.setUserId(userId);
+            updatedList.add(subject);
+        }
+        return updatedList;
+    }
 }

app/src/main/java/io/github/wulkanowy/data/sync/timetable/TimetableSync.java

@@ -9,12 +9,13 @@ import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import io.github.wulkanowy.api.Vulcan;
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.VulcanException;
+import io.github.wulkanowy.api.generic.Lesson;
 import io.github.wulkanowy.data.db.dao.entities.DaoSession;
 import io.github.wulkanowy.data.db.dao.entities.Day;
 import io.github.wulkanowy.data.db.dao.entities.DayDao;
-import io.github.wulkanowy.data.db.dao.entities.Lesson;
+import io.github.wulkanowy.data.db.dao.entities.TimetableLesson;
-import io.github.wulkanowy.data.db.dao.entities.LessonDao;
+import io.github.wulkanowy.data.db.dao.entities.TimetableLessonDao;
 import io.github.wulkanowy.data.db.dao.entities.Week;
 import io.github.wulkanowy.data.db.dao.entities.WeekDao;
 import io.github.wulkanowy.data.db.shared.SharedPrefContract;
@@ -27,9 +28,11 @@ public class TimetableSync implements TimetableSyncContract {
 
     private final DaoSession daoSession;
 
+    private final SharedPrefContract sharedPref;
+
     private final Vulcan vulcan;
 
-    private final SharedPrefContract sharedPref;
+    private long userId;
 
     @Inject
     TimetableSync(DaoSession daoSession, SharedPrefContract sharedPref, Vulcan vulcan) {
@@ -39,82 +42,121 @@ public class TimetableSync implements TimetableSyncContract {
     }
 
     @Override
-    public void syncTimetable(String date) throws NotLoggedInErrorException, IOException, ParseException {
+    public void syncTimetable() throws IOException, ParseException, VulcanException {
-        long userId = sharedPref.getCurrentUserId();
+        syncTimetable(null);
-
-        io.github.wulkanowy.api.generic.Week<io.github.wulkanowy.api.generic.Day> weekFromNet =
-                date == null ? vulcan.getTimetable().getWeekTable()
-                : vulcan.getTimetable().getWeekTable(String.valueOf(TimeUtils.getNetTicks(date)));
-
-        Week weekFromDb = daoSession.getWeekDao().queryBuilder()
-                .where(WeekDao.Properties.UserId.eq(userId),
-                        WeekDao.Properties.StartDayDate.eq(weekFromNet.getStartDayDate()))
-                .unique();
-
-        Long weekId;
-
-        if (weekFromDb == null) {
-            Week weekFromNetEntity = DataObjectConverter.weekToWeekEntity(weekFromNet).setUserId(userId);
-            weekId = daoSession.getWeekDao().insert(weekFromNetEntity);
-        } else {
-            weekId = weekFromDb.getId();
-        }
-
-        List<io.github.wulkanowy.api.generic.Day> dayListFromNet = weekFromNet.getDays();
-
-        List<Lesson> updatedLessonList = new ArrayList<>();
-
-        for (io.github.wulkanowy.api.generic.Day dayFromNet : dayListFromNet) {
-            Day dayFromNetEntity = DataObjectConverter.dayToDayEntity(dayFromNet);
-
-            Day dayFromDb = daoSession.getDayDao().queryBuilder()
-                    .where(DayDao.Properties.UserId.eq(userId),
-                            DayDao.Properties.WeekId.eq(weekId),
-                            DayDao.Properties.Date.eq(dayFromNetEntity.getDate()))
-                    .unique();
-
-            dayFromNetEntity.setUserId(userId);
-            dayFromNetEntity.setWeekId(weekId);
-
-            Long dayId;
-
-            if (dayFromDb != null) {
-                dayFromNetEntity.setId(dayFromDb.getId());
-                daoSession.getDayDao().save(dayFromNetEntity);
-                dayId = dayFromNetEntity.getId();
-            } else {
-                dayId = daoSession.getDayDao().insert(dayFromNetEntity);
-            }
-
-            List<Lesson> lessonListFromNetEntities = DataObjectConverter
-                    .lessonsToLessonsEntities(dayFromNet.getLessons());
-
-            for (Lesson lessonFromNetEntity : lessonListFromNetEntities) {
-                Lesson lessonFromDb = daoSession.getLessonDao().queryBuilder()
-                        .where(LessonDao.Properties.DayId.eq(dayId),
-                                LessonDao.Properties.Date.eq(lessonFromNetEntity.getDate()),
-                                LessonDao.Properties.StartTime.eq(lessonFromNetEntity.getStartTime()),
-                                LessonDao.Properties.EndTime.eq(lessonFromNetEntity.getEndTime()))
-                        .unique();
-
-                if (lessonFromDb != null) {
-                    lessonFromNetEntity.setId(lessonFromDb.getId());
-                }
-
-                lessonFromNetEntity.setDayId(dayFromNetEntity.getId());
-
-                if (!"".equals(lessonFromNetEntity.getSubject())) {
-                    updatedLessonList.add(lessonFromNetEntity);
-                }
-            }
-        }
-        daoSession.getLessonDao().saveInTx(updatedLessonList);
-
-        LogUtils.debug("Synchronization lessons (amount = " + updatedLessonList.size() + ")");
     }
 
     @Override
-    public void syncTimetable() throws NotLoggedInErrorException, IOException, ParseException {
+    public void syncTimetable(String date) throws IOException, ParseException, VulcanException {
-        syncTimetable(null);
+        this.userId = sharedPref.getCurrentUserId();
+
+        io.github.wulkanowy.api.generic.Week<io.github.wulkanowy.api.generic.Day> weekApi = getWeekFromApi(getNormalizedDate(date));
+        Week weekDb = getWeekFromDb(weekApi.getStartDayDate());
+
+        long weekId = updateWeekInDb(weekDb, weekApi);
+
+        List<TimetableLesson> lessonList = updateDays(weekApi.getDays(), weekId);
+
+        daoSession.getTimetableLessonDao().saveInTx(lessonList);
+
+        LogUtils.debug("Synchronization timetable lessons (amount = " + lessonList.size() + ")");
+    }
+
+    private String getNormalizedDate(String date) throws ParseException {
+        return null != date ? String.valueOf(TimeUtils.getNetTicks(date)) : "";
+    }
+
+    private io.github.wulkanowy.api.generic.Week<io.github.wulkanowy.api.generic.Day> getWeekFromApi(String date)
+            throws IOException, VulcanException, ParseException {
+        return vulcan.getTimetable().getWeekTable(date);
+    }
+
+    private Week getWeekFromDb(String date) {
+        return daoSession.getWeekDao()
+                .queryBuilder()
+                .where(WeekDao.Properties.UserId.eq(userId), WeekDao.Properties.StartDayDate.eq(date))
+                .unique();
+    }
+
+    private Long updateWeekInDb(Week dbEntity, io.github.wulkanowy.api.generic.Week fromApi) {
+        if (dbEntity != null) {
+            dbEntity.setIsTimetableSynced(true);
+            dbEntity.update();
+
+            return dbEntity.getId();
+        }
+
+        Week apiEntity = DataObjectConverter.weekToWeekEntity(fromApi).setUserId(userId);
+        apiEntity.setIsTimetableSynced(true);
+
+        return daoSession.getWeekDao().insert(apiEntity);
+    }
+
+    private List<TimetableLesson> updateDays(List<io.github.wulkanowy.api.generic.Day> dayListFromApi, long weekId) {
+        List<TimetableLesson> updatedLessonList = new ArrayList<>();
+
+        for (io.github.wulkanowy.api.generic.Day dayFromApi : dayListFromApi) {
+
+            Day dbDayEntity = getDayFromDb(dayFromApi.getDate());
+
+            Day apiDayEntity = DataObjectConverter.dayToDayEntity(dayFromApi);
+
+            long dayId = updateDay(dbDayEntity, apiDayEntity, weekId);
+
+            updateLessons(dayFromApi.getLessons(), updatedLessonList, dayId);
+        }
+
+        return updatedLessonList;
+    }
+
+    private Day getDayFromDb(String date) {
+        return daoSession.getDayDao()
+                .queryBuilder()
+                .where(DayDao.Properties.UserId.eq(userId), DayDao.Properties.Date.eq(date))
+                .unique();
+    }
+
+    private long updateDay(Day dayFromDb, Day apiDayEntity, long weekId) {
+        apiDayEntity.setUserId(userId);
+        apiDayEntity.setWeekId(weekId);
+
+        if (null != dayFromDb) {
+            apiDayEntity.setId(dayFromDb.getId());
+
+            daoSession.getDayDao().save(apiDayEntity);
+            dayFromDb.refresh();
+
+            return dayFromDb.getId();
+        }
+
+        return daoSession.getDayDao().insert(apiDayEntity);
+    }
+
+    private void updateLessons(List<Lesson> lessons, List<TimetableLesson> updatedLessons, long dayId) {
+        List<TimetableLesson> lessonsFromApiEntities = DataObjectConverter
+                .lessonsToTimetableLessonsEntities(lessons);
+
+        for (TimetableLesson apiLessonEntity : lessonsFromApiEntities) {
+            TimetableLesson lessonFromDb = getLessonFromDb(apiLessonEntity, dayId);
+
+            apiLessonEntity.setDayId(dayId);
+
+            if (lessonFromDb != null) {
+                apiLessonEntity.setId(lessonFromDb.getId());
+            }
+
+            if (!"".equals(apiLessonEntity.getSubject())) {
+                updatedLessons.add(apiLessonEntity);
+            }
+        }
+    }
+
+    private TimetableLesson getLessonFromDb(TimetableLesson apiEntity, long dayId) {
+        return daoSession.getTimetableLessonDao().queryBuilder()
+                .where(TimetableLessonDao.Properties.DayId.eq(dayId),
+                        TimetableLessonDao.Properties.Date.eq(apiEntity.getDate()),
+                        TimetableLessonDao.Properties.StartTime.eq(apiEntity.getStartTime()),
+                        TimetableLessonDao.Properties.EndTime.eq(apiEntity.getEndTime()))
+                .unique();
     }
 }

app/src/main/java/io/github/wulkanowy/data/sync/timetable/TimetableSyncContract.java

@@ -3,11 +3,11 @@ package io.github.wulkanowy.data.sync.timetable;
 import java.io.IOException;
 import java.text.ParseException;
 
-import io.github.wulkanowy.api.login.NotLoggedInErrorException;
+import io.github.wulkanowy.api.VulcanException;
 
 public interface TimetableSyncContract {
 
-    void syncTimetable(String date) throws NotLoggedInErrorException, IOException, ParseException;
+    void syncTimetable(String date) throws VulcanException, IOException, ParseException;
 
-    void syncTimetable() throws NotLoggedInErrorException, IOException, ParseException;
+    void syncTimetable() throws VulcanException, IOException, ParseException;
 }

app/src/main/java/io/github/wulkanowy/di/component/FragmentComponent.java

@@ -4,6 +4,7 @@ import dagger.Component;
 import io.github.wulkanowy.di.annotations.PerFragment;
 import io.github.wulkanowy.di.modules.FragmentModule;
 import io.github.wulkanowy.ui.main.attendance.AttendanceFragment;
+import io.github.wulkanowy.ui.main.attendance.AttendanceTabFragment;
 import io.github.wulkanowy.ui.main.dashboard.DashboardFragment;
 import io.github.wulkanowy.ui.main.grades.GradesFragment;
 import io.github.wulkanowy.ui.main.timetable.TimetableFragment;
@@ -17,6 +18,8 @@ public interface FragmentComponent {
 
     void inject(AttendanceFragment attendanceFragment);
 
+    void inject(AttendanceTabFragment attendanceTabFragment);
+
     void inject(DashboardFragment dashboardFragment);
 
     void inject(TimetableFragment timetableFragment);

app/src/main/java/io/github/wulkanowy/di/modules/ApplicationModule.java

@@ -21,9 +21,11 @@ import io.github.wulkanowy.data.db.resources.ResourcesContract;
 import io.github.wulkanowy.data.db.shared.SharedPref;
 import io.github.wulkanowy.data.db.shared.SharedPrefContract;
 import io.github.wulkanowy.data.sync.SyncContract;
+import io.github.wulkanowy.data.sync.account.AccountSync;
+import io.github.wulkanowy.data.sync.account.AccountSyncContract;
+import io.github.wulkanowy.data.sync.attendance.AttendanceSync;
+import io.github.wulkanowy.data.sync.attendance.AttendanceSyncContract;
 import io.github.wulkanowy.data.sync.grades.GradeSync;
-import io.github.wulkanowy.data.sync.login.LoginSync;
-import io.github.wulkanowy.data.sync.login.LoginSyncContract;
 import io.github.wulkanowy.data.sync.subjects.SubjectSync;
 import io.github.wulkanowy.data.sync.timetable.TimetableSync;
 import io.github.wulkanowy.data.sync.timetable.TimetableSyncContract;
@@ -98,8 +100,8 @@ public class ApplicationModule {
 
     @Singleton
     @Provides
-    LoginSyncContract provideLoginSync(LoginSync loginSync) {
+    AccountSyncContract provideLoginSync(AccountSync accountSync) {
-        return loginSync;
+        return accountSync;
     }
 
     @SyncGrades
@@ -122,6 +124,12 @@ public class ApplicationModule {
         return timetableSync;
     }
 
+    @Singleton
+    @Provides
+    AttendanceSyncContract provideAttendanceSync(AttendanceSync attendanceSync) {
+        return attendanceSync;
+    }
+
     @Provides
     FirebaseJobDispatcher provideDispatcher() {
         return new FirebaseJobDispatcher(new GooglePlayDriver(application));

app/src/main/java/io/github/wulkanowy/di/modules/FragmentModule.java

@@ -7,7 +7,11 @@ import dagger.Provides;
 import eu.davidea.flexibleadapter.FlexibleAdapter;
 import io.github.wulkanowy.di.annotations.PerFragment;
 import io.github.wulkanowy.ui.main.attendance.AttendanceContract;
+import io.github.wulkanowy.ui.main.attendance.AttendanceHeaderItem;
+import io.github.wulkanowy.ui.main.attendance.AttendancePagerAdapter;
 import io.github.wulkanowy.ui.main.attendance.AttendancePresenter;
+import io.github.wulkanowy.ui.main.attendance.AttendanceTabContract;
+import io.github.wulkanowy.ui.main.attendance.AttendanceTabPresenter;
 import io.github.wulkanowy.ui.main.dashboard.DashboardContract;
 import io.github.wulkanowy.ui.main.dashboard.DashboardPresenter;
 import io.github.wulkanowy.ui.main.grades.GradeHeaderItem;
@@ -47,6 +51,22 @@ public class FragmentModule {
         return dashboardPresenter;
     }
 
+    @PerFragment
+    @Provides
+    AttendanceTabContract.Presenter provideAttendanceTabPresenter(AttendanceTabPresenter timetableTabPresenter) {
+        return timetableTabPresenter;
+    }
+
+    @Provides
+    AttendancePagerAdapter provideAttendancePagerAdapter() {
+        return new AttendancePagerAdapter(fragment.getChildFragmentManager());
+    }
+
+    @Provides
+    FlexibleAdapter<AttendanceHeaderItem> provideAttendanceTabAdapter() {
+        return new FlexibleAdapter<>(null);
+    }
+
     @PerFragment
     @Provides
     TimetableContract.Presenter provideTimetablePresenter(TimetablePresenter timetablePresenter) {
@@ -65,12 +85,12 @@ public class FragmentModule {
     }
 
     @Provides
-    FlexibleAdapter<GradeHeaderItem> provideGradesAdapter() {
+    FlexibleAdapter<TimetableHeaderItem> provideTimetableTabAdapter() {
         return new FlexibleAdapter<>(null);
     }
 
     @Provides
-    FlexibleAdapter<TimetableHeaderItem> provideTimetableTabAdapter() {
+    FlexibleAdapter<GradeHeaderItem> provideGradesAdapter() {
         return new FlexibleAdapter<>(null);
     }
 }

app/src/main/java/io/github/wulkanowy/services/GradeNotify.java

@@ -0,0 +1,36 @@
+package io.github.wulkanowy.services;
+
+import android.annotation.TargetApi;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.content.Context;
+
+import io.github.wulkanowy.R;
+
+class GradeNotify extends NotificationService {
+
+    private static final String CHANNEL_ID = "Grade_Notify";
+
+    GradeNotify(Context context) {
+        super(context);
+    }
+
+    @Override
+    @TargetApi(26)
+    void createChannel() {
+        String channelName = getString(R.string.notify_grade_channel);
+
+        NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID, channelName,
+                NotificationManager.IMPORTANCE_HIGH);
+        notificationChannel.enableLights(true);
+        notificationChannel.enableVibration(true);
+        notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
+        getManager().createNotificationChannel(notificationChannel);
+    }
+
+    @Override
+    String getChannelId() {
+        return CHANNEL_ID;
+    }
+}

app/src/main/java/io/github/wulkanowy/services/NotificationService.java

@@ -3,29 +3,22 @@ package io.github.wulkanowy.services;
 
 import android.annotation.TargetApi;
 import android.app.Notification;
-import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.content.Context;
 import android.os.Build;
+import android.support.annotation.StringRes;
 import android.support.v4.app.NotificationCompat;
 
 import java.util.Random;
 
-class NotificationService {
+public class NotificationService {
-
-    private static final String CHANNEL_ID = "Wulkanowy_New_Grade_Channel";
-
-    private static final String CHANNEL_NAME = "New Grade Channel";
 
     private NotificationManager manager;
 
     private Context context;
 
-    NotificationService(Context context) {
+    public NotificationService(Context context) {
         this.context = context;
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            createChannel();
-        }
     }
 
     void notify(Notification notification) {
@@ -33,23 +26,32 @@ class NotificationService {
     }
 
     NotificationCompat.Builder notificationBuilder() {
-        return new NotificationCompat.Builder(context, CHANNEL_ID);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            createChannel();
+        }
+        return new NotificationCompat.Builder(context, getChannelId());
     }
 
-    @TargetApi(26)
+    public void cancelAll() {
-    private void createChannel() {
+        getManager().cancelAll();
-        NotificationChannel notificationChannel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME,
-                NotificationManager.IMPORTANCE_HIGH);
-        notificationChannel.enableLights(true);
-        notificationChannel.enableVibration(true);
-        notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
-        getManager().createNotificationChannel(notificationChannel);
     }
 
-    private NotificationManager getManager() {
+    NotificationManager getManager() {
         if (manager == null) {
             manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
         }
         return manager;
     }
+
+    String getString(@StringRes int stringId) {
+        return context.getString(stringId);
+    }
+
+    @TargetApi(26)
+    void createChannel() {
+    }
+
+    String getChannelId() {
+        return null;
+    }
 }

app/src/main/java/io/github/wulkanowy/services/SyncJob.java

@@ -4,6 +4,7 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.support.v4.app.NotificationCompat;
 
+import com.crashlytics.android.Crashlytics;
 import com.firebase.jobdispatcher.Constraint;
 import com.firebase.jobdispatcher.FirebaseJobDispatcher;
 import com.firebase.jobdispatcher.GooglePlayDriver;
@@ -14,6 +15,7 @@ import com.firebase.jobdispatcher.RetryStrategy;
 import com.firebase.jobdispatcher.SimpleJobService;
 import com.firebase.jobdispatcher.Trigger;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import javax.inject.Inject;
@@ -27,32 +29,34 @@ import io.github.wulkanowy.utils.LogUtils;
 
 public class SyncJob extends SimpleJobService {
 
-    private static final int DEFAULT_INTERVAL_START = 60 * 50;
-
-    private static final int DEFAULT_INTERVAL_END = DEFAULT_INTERVAL_START + (60 * 40);
-
     public static final String EXTRA_INTENT_KEY = "cardId";
 
-    private List<Grade> gradeList;
+    public static final String JOB_TAG = "SyncJob";
+
+    private List<Grade> gradeList = new ArrayList<>();
 
     @Inject
     RepositoryContract repository;
 
-    public static void start(Context context) {
+    public static void start(Context context, int interval, boolean useOnlyWifi) {
         FirebaseJobDispatcher dispatcher = new FirebaseJobDispatcher(new GooglePlayDriver(context));
 
         dispatcher.mustSchedule(dispatcher.newJobBuilder()
                 .setLifetime(Lifetime.FOREVER)
                 .setService(SyncJob.class)
-                .setTag("SyncJob")
+                .setTag(JOB_TAG)
                 .setRecurring(true)
-                .setTrigger(Trigger.executionWindow(DEFAULT_INTERVAL_START, DEFAULT_INTERVAL_END))
+                .setTrigger(Trigger.executionWindow(interval * 60, (interval + 10) * 60))
-                .setConstraints(Constraint.ON_ANY_NETWORK)
+                .setConstraints(useOnlyWifi ? Constraint.ON_UNMETERED_NETWORK : Constraint.ON_ANY_NETWORK)
                 .setReplaceCurrent(false)
                 .setRetryStrategy(RetryStrategy.DEFAULT_EXPONENTIAL)
                 .build());
     }
 
+    public static void stop(Context context) {
+        new FirebaseJobDispatcher(new GooglePlayDriver(context)).cancel(JOB_TAG);
+    }
+
     @Override
     public void onCreate() {
         super.onCreate();
@@ -62,28 +66,29 @@ public class SyncJob extends SimpleJobService {
     @Override
     public int onRunJob(JobParameters job) {
         try {
-            repository.loginCurrentUser();
+            repository.initLastUser();
             repository.syncAll();
 
             gradeList = repository.getNewGrades();
 
-            if (!gradeList.isEmpty()) {
+            if (!gradeList.isEmpty() && repository.isNotifyEnable()) {
                 showNotification();
             }
             return JobService.RESULT_SUCCESS;
         } catch (Exception e) {
+            Crashlytics.logException(e);
             LogUtils.error("During background synchronization an error occurred", e);
             return JobService.RESULT_FAIL_RETRY;
         }
     }
 
     private void showNotification() {
-        NotificationService service = new NotificationService(getApplicationContext());
+        GradeNotify gradeNotify = new GradeNotify(getApplicationContext());
 
-        service.notify(service.notificationBuilder()
+        gradeNotify.notify(gradeNotify.notificationBuilder()
                 .setContentTitle(getStringTitle())
                 .setContentText(getStringContent())
-                .setSmallIcon(R.drawable.ic_stat_notify)
+                .setSmallIcon(R.drawable.ic_notify_grade)
                 .setAutoCancel(true)
                 .setDefaults(NotificationCompat.DEFAULT_ALL)
                 .setPriority(NotificationCompat.PRIORITY_HIGH)

app/src/main/java/io/github/wulkanowy/ui/base/BasePresenter.java

@@ -25,6 +25,10 @@ public class BasePresenter<V extends BaseContract.View> implements BaseContract.
         view = null;
     }
 
+    protected boolean isViewAttached() {
+        return view != null;
+    }
+
     public final RepositoryContract getRepository() {
         return repository;
     }

app/src/main/java/io/github/wulkanowy/ui/login/LoginActivity.java

@@ -7,6 +7,7 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.support.design.widget.Snackbar;
 import android.support.design.widget.TextInputLayout;
+import android.support.v7.app.ActionBar;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;
 import android.widget.ArrayAdapter;
@@ -97,14 +98,12 @@ public class LoginActivity extends BaseActivity implements LoginContract.View {
 
     @OnClick(R.id.login_activity_create_text)
     void onCreateAccountButtonClick() {
-        CommonUtils.openInternalBrowserViewer(getApplicationContext(),
+        CommonUtils.openInternalBrowserViewer(this, AppConstant.VULCAN_CREATE_ACCOUNT_URL);
-                AppConstant.VULCAN_CREATE_ACCOUNT_URL);
     }
 
     @OnClick(R.id.login_activity_forgot_text)
     void onForgotPasswordButtonClick() {
-        CommonUtils.openInternalBrowserViewer(getApplicationContext(),
+        CommonUtils.openInternalBrowserViewer(this, AppConstant.VULCAN_FORGOT_PASS_URL);
-                AppConstant.VULCAN_FORGOT_PASS_URL);
     }
 
     @Override
@@ -211,6 +210,18 @@ public class LoginActivity extends BaseActivity implements LoginContract.View {
         });
     }
 
+    @Override
+    public void showActionBar(boolean show) {
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
+            if (show) {
+                actionBar.show();
+            } else {
+                actionBar.hide();
+            }
+        }
+    }
+
     @Override
     public void onDestroy() {
         super.onDestroy();

app/src/main/java/io/github/wulkanowy/ui/login/LoginContract.java

@@ -33,6 +33,8 @@ public interface LoginContract {
 
         void hideSoftInput();
 
+        void showActionBar(boolean show);
+
     }
 
     @PerActivity
@@ -42,6 +44,8 @@ public interface LoginContract {
 
         void onStartAsync();
 
+        void onDoInBackground(int stepNumber) throws Exception;
+
         void onLoginProgress(int step);
 
         void onEndAsync(boolean success, Exception exception);

app/src/main/java/io/github/wulkanowy/ui/login/LoginPresenter.java

@@ -17,35 +17,32 @@ public class LoginPresenter extends BasePresenter<LoginContract.View>
 
     private LoginTask loginAsync;
 
+    private String email;
+
+    private String password;
+
+    private String symbol;
+
     @Inject
     LoginPresenter(RepositoryContract repository) {
         super(repository);
     }
 
-    @Override
-    public void onDestroy() {
-        super.onDestroy();
-        if (loginAsync != null) {
-            loginAsync.cancel(true);
-            loginAsync = null;
-        }
-    }
-
     @Override
     public void attemptLogin(String email, String password, String symbol) {
         getView().resetViewErrors();
 
+        this.email = email;
+        this.password = password;
+        this.symbol = getNormalizedSymbol(symbol);
+
         if (!isAllFieldCorrect(password, email)) {
             getView().showSoftInput();
             return;
         }
 
         if (getView().isNetworkConnected()) {
-            // Dopóki używamy AsyncTask presenter będzie musiał "wiedzieć" o AsyncTaskach
+            loginAsync = new LoginTask(this);
-            loginAsync = new LoginTask(this,
-                    email,
-                    password,
-                    getNormalizedSymbol(symbol));
             loginAsync.execute();
 
         } else {
@@ -57,8 +54,23 @@ public class LoginPresenter extends BasePresenter<LoginContract.View>
 
     @Override
     public void onStartAsync() {
+        if (isViewAttached()) {
+            getView().showActionBar(false);
             getView().showLoginProgress(true);
         }
+    }
+
+    @Override
+    public void onDoInBackground(int stepNumber) throws Exception {
+        switch (stepNumber) {
+            case 1:
+                getRepository().registerUser(email, password, symbol);
+                break;
+            case 2:
+                getRepository().syncAll();
+                break;
+        }
+    }
 
     @Override
     public void onLoginProgress(int step) {
@@ -73,25 +85,28 @@ public class LoginPresenter extends BasePresenter<LoginContract.View>
     public void onEndAsync(boolean success, Exception exception) {
         if (success) {
             getView().openMainActivity();
+            return;
         } else if (exception instanceof BadCredentialsException) {
             getView().setErrorPassIncorrect();
             getView().showSoftInput();
-            getView().showLoginProgress(false);
         } else if (exception instanceof AccountPermissionException) {
             getView().setErrorSymbolRequired();
             getView().showSoftInput();
-            getView().showLoginProgress(false);
         } else {
             getView().onError(getRepository().getErrorLoginMessage(exception));
-            getView().showLoginProgress(false);
         }
 
+        getView().showActionBar(true);
+        getView().showLoginProgress(false);
     }
 
     @Override
     public void onCanceledAsync() {
+        if (isViewAttached()) {
+            getView().showActionBar(true);
             getView().showLoginProgress(false);
         }
+    }
 
     private boolean isEmailValid(String email) {
         return email.contains("@") || email.contains("\\\\");
@@ -140,4 +155,13 @@ public class LoginPresenter extends BasePresenter<LoginContract.View>
         }
         return correct;
     }
+
+    @Override
+    public void onDestroy() {
+        if (loginAsync != null) {
+            loginAsync.cancel(true);
+            loginAsync = null;
+        }
+        super.onDestroy();
+    }
 }

app/src/main/java/io/github/wulkanowy/ui/login/LoginTask.java

@@ -4,21 +4,12 @@ import android.os.AsyncTask;
 
 public class LoginTask extends AsyncTask<Void, Integer, Boolean> {
 
-    private String email;
-
-    private String password;
-
-    private String symbol;
-
     private LoginContract.Presenter presenter;
 
     private Exception exception;
 
-    LoginTask(LoginContract.Presenter presenter, String email, String password, String symbol) {
+    LoginTask(LoginContract.Presenter presenter) {
         this.presenter = presenter;
-        this.email = email;
-        this.password = password;
-        this.symbol = symbol;
     }
 
     @Override
@@ -30,10 +21,10 @@ public class LoginTask extends AsyncTask<Void, Integer, Boolean> {
     protected Boolean doInBackground(Void... params) {
         try {
             publishProgress(1);
-            presenter.getRepository().loginUser(email, password, symbol);
+            presenter.onDoInBackground(1);
 
             publishProgress(2);
-            presenter.getRepository().syncAll();
+            presenter.onDoInBackground(2);
         } catch (Exception e) {
             exception = e;
             return false;

app/src/main/java/io/github/wulkanowy/ui/main/MainActivity.java

@@ -18,15 +18,15 @@ import butterknife.ButterKnife;
 import io.github.wulkanowy.R;
 import io.github.wulkanowy.services.SyncJob;
 import io.github.wulkanowy.ui.base.BaseActivity;
+import io.github.wulkanowy.ui.main.attendance.AttendanceFragment;
 import io.github.wulkanowy.ui.main.dashboard.DashboardFragment;
 import io.github.wulkanowy.ui.main.grades.GradesFragment;
+import io.github.wulkanowy.ui.main.settings.SettingsFragment;
 import io.github.wulkanowy.ui.main.timetable.TimetableFragment;
 
 public class MainActivity extends BaseActivity implements MainContract.View,
         AHBottomNavigation.OnTabSelectedListener, OnFragmentIsReadyListener {
 
-    private int initTabPosition = 0;
-
     @BindView(R.id.main_activity_nav)
     AHBottomNavigation bottomNavigation;
 
@@ -51,15 +51,10 @@ public class MainActivity extends BaseActivity implements MainContract.View,
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        initTabPosition = getIntent().getIntExtra(SyncJob.EXTRA_INTENT_KEY, initTabPosition);
-
         getActivityComponent().inject(this);
         setButterKnife(ButterKnife.bind(this));
 
-        presenter.onStart(this);
+        presenter.onStart(this, getIntent().getIntExtra(SyncJob.EXTRA_INTENT_KEY, -1));
-
-        initiationViewPager();
-        initiationBottomNav();
     }
 
     @Override
@@ -101,48 +96,44 @@ public class MainActivity extends BaseActivity implements MainContract.View,
         presenter.onFragmentIsReady();
     }
 
-    private void initiationBottomNav() {
+    @Override
-        bottomNavigation.addItem(new AHBottomNavigationItem(
+    public void initiationBottomNav(int tabPosition) {
-                getString(R.string.grades_text),
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.grades_text),
-                getResources().getDrawable(R.drawable.ic_menu_grade_26dp)
+                R.drawable.ic_menu_grade_26dp));
-        ));
+
-        bottomNavigation.addItem(new AHBottomNavigationItem(
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.attendance_text),
-                getString(R.string.attendance_text),
+                R.drawable.ic_menu_attendance_24dp));
-                getResources().getDrawable(R.drawable.ic_menu_attendance_24dp)
+
-        ));
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.dashboard_text),
-        bottomNavigation.addItem(new AHBottomNavigationItem(
+                R.drawable.ic_menu_dashboard_24dp));
-                getString(R.string.dashboard_text),
+
-                getResources().getDrawable(R.drawable.ic_menu_dashboard_24dp)
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.timetable_text),
-        ));
+                R.drawable.ic_menu_timetable_24dp));
-        bottomNavigation.addItem(new AHBottomNavigationItem(
+
-                getString(R.string.lessonplan_text),
+        bottomNavigation.addItem(new AHBottomNavigationItem(getString(R.string.settings_text),
-                getResources().getDrawable(R.drawable.ic_menu_timetable_24dp)
+                R.drawable.ic_menu_other_24dp));
-        ));
-        bottomNavigation.addItem(new AHBottomNavigationItem(
-                getString(R.string.settings_text),
-                getResources().getDrawable(R.drawable.ic_menu_other_24dp)
-        ));
 
         bottomNavigation.setAccentColor(getResources().getColor(R.color.colorPrimary));
         bottomNavigation.setInactiveColor(Color.BLACK);
         bottomNavigation.setBackgroundColor(getResources().getColor(R.color.colorBackgroundBottomNav));
         bottomNavigation.setTitleState(AHBottomNavigation.TitleState.ALWAYS_SHOW);
         bottomNavigation.setOnTabSelectedListener(this);
-        bottomNavigation.setCurrentItem(initTabPosition);
+        bottomNavigation.setCurrentItem(tabPosition);
         bottomNavigation.setBehaviorTranslationEnabled(false);
     }
 
-    private void initiationViewPager() {
+    @Override
+    public void initiationViewPager(int tabPosition) {
         pagerAdapter.addFragment(new GradesFragment());
-        pagerAdapter.addFragment(new DashboardFragment());
+        pagerAdapter.addFragment(new AttendanceFragment());
         pagerAdapter.addFragment(new DashboardFragment());
         pagerAdapter.addFragment(new TimetableFragment());
-        pagerAdapter.addFragment(new DashboardFragment());
+        pagerAdapter.addFragment(new SettingsFragment());
 
         viewPager.setPagingEnabled(false);
         viewPager.setAdapter(pagerAdapter);
         viewPager.setOffscreenPageLimit(4);
-        viewPager.setCurrentItem(initTabPosition, false);
+        viewPager.setCurrentItem(tabPosition, false);
     }
 
     @Override

app/src/main/java/io/github/wulkanowy/ui/main/MainContract.java

@@ -14,11 +14,17 @@ public interface MainContract {
         void showActionBar();
 
         void hideActionBar();
+
+        void initiationViewPager(int tabPosition);
+
+        void initiationBottomNav(int tabPosition);
     }
 
     @PerActivity
     interface Presenter extends BaseContract.Presenter<View> {
 
+        void onStart(View view, int tabPositionIntent);
+
         void onTabSelected(int position, boolean wasSelected);
 
         void onFragmentIsReady();

app/src/main/java/io/github/wulkanowy/ui/main/MainPresenter.java

@@ -17,10 +17,21 @@ public class MainPresenter extends BasePresenter<MainContract.View>
     }
 
     @Override
-    public void onStart(MainContract.View view) {
+    public void onStart(MainContract.View view, int tabPositionIntent) {
         super.onStart(view);
         getView().showProgressBar(true);
         getView().hideActionBar();
+
+        int tabPosition;
+
+        if (tabPositionIntent != -1) {
+            tabPosition = tabPositionIntent;
+        } else {
+            tabPosition = getRepository().getStartupTab();
+        }
+
+        getView().initiationBottomNav(tabPosition);
+        getView().initiationViewPager(tabPosition);
     }
 
     @Override
@@ -32,11 +43,11 @@ public class MainPresenter extends BasePresenter<MainContract.View>
 
     @Override
     public void onFragmentIsReady() {
-        if (fragmentCount < 5) {
+        if (fragmentCount < 4) {
             fragmentCount++;
         }
 
-        if (fragmentCount == 5) {
+        if (fragmentCount == 4) {
             getView().showActionBar();
             getView().showProgressBar(false);
         }

app/src/main/java/io/github/wulkanowy/ui/main/TabsData.java

@@ -1,35 +1,35 @@
-package io.github.wulkanowy.ui.main.timetable;
+package io.github.wulkanowy.ui.main;
 
 import android.support.v4.app.Fragment;
 
 import java.util.ArrayList;
 import java.util.List;
 
-class TabsData {
+public class TabsData {
 
     private List<Fragment> fragments = new ArrayList<>();
 
     private List<String> titles = new ArrayList<>();
 
-    Fragment getFragment(int index) {
+    public Fragment getFragment(int index) {
         return fragments.get(index);
     }
 
-    void addFragment(Fragment fragment) {
+    public void addFragment(Fragment fragment) {
         if (fragment != null) {
             fragments.add(fragment);
         }
     }
 
-    int getFragmentsCount() {
+    public int getFragmentsCount() {
         return fragments.size();
     }
 
-    String getTitle(int index) {
+    public String getTitle(int index) {
         return titles.get(index);
     }
 
-    void addTitle(String title) {
+    public void addTitle(String title) {
         if (title != null) {
             titles.add(title);
         }

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceContract.java

@@ -1,8 +1,9 @@
 package io.github.wulkanowy.ui.main.attendance;
 
-import io.github.wulkanowy.di.annotations.PerFragment;
+import io.github.wulkanowy.di.annotations.PerActivity;
 import io.github.wulkanowy.ui.base.BaseContract;
 import io.github.wulkanowy.ui.main.OnFragmentIsReadyListener;
+import io.github.wulkanowy.ui.main.TabsData;
 
 public interface AttendanceContract {
 
@@ -10,14 +11,22 @@ public interface AttendanceContract {
 
         void setActivityTitle();
 
+        void scrollViewPagerToPosition(int position);
+
+        void setTabDataToAdapter(TabsData tabsData);
+
+        void setAdapterWithTabLayout();
+
         boolean isMenuVisible();
     }
 
-    @PerFragment
+    @PerActivity
     interface Presenter extends BaseContract.Presenter<View> {
 
+        void onFragmentActivated(boolean isVisible);
+
         void onStart(View view, OnFragmentIsReadyListener listener);
 
-        void onFragmentVisible(boolean isVisible);
+        void setRestoredPosition(int position);
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceDialogFragment.java

@@ -0,0 +1,91 @@
+package io.github.wulkanowy.ui.main.attendance;
+
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.v4.app.DialogFragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+import io.github.wulkanowy.R;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
+
+public class AttendanceDialogFragment extends DialogFragment {
+
+    private static final String ARGUMENT_KEY = "Item";
+
+    private AttendanceLesson lesson;
+
+    @BindView(R.id.attendance_dialog_subject_value)
+    TextView subject;
+
+    @BindView(R.id.attendance_dialog_date_value)
+    TextView date;
+
+    @BindView(R.id.attendance_dialog_number_value)
+    TextView number;
+
+    @BindView(R.id.attendance_dialog_description_value)
+    TextView description;
+
+    public AttendanceDialogFragment() {
+        //empty constructor for fragment
+    }
+
+    public static AttendanceDialogFragment newInstance(AttendanceLesson lesson) {
+        AttendanceDialogFragment dialogFragment = new AttendanceDialogFragment();
+
+        Bundle bundle = new Bundle();
+        bundle.putSerializable(ARGUMENT_KEY, lesson);
+
+        dialogFragment.setArguments(bundle);
+
+        return dialogFragment;
+    }
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (getArguments() != null) {
+            lesson = (AttendanceLesson) getArguments().getSerializable(ARGUMENT_KEY);
+        }
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.attendance_dialog, container, false);
+
+        ButterKnife.bind(this, view);
+
+        if (!lesson.getSubject().isEmpty()) {
+            subject.setText(lesson.getSubject());
+        }
+
+        if (!lesson.getDate().isEmpty()) {
+            date.setText(lesson.getDate());
+        }
+
+        if (0 != lesson.getNumber()) {
+            number.setText(String.valueOf(lesson.getNumber()));
+        }
+
+        description.setText(lesson.getDescription());
+
+        if (lesson.getIsAbsenceUnexcused()) {
+            description.setTextColor(getResources().getColor(R.color.colorPrimaryDark));
+        }
+
+        return view;
+    }
+
+    @OnClick(R.id.attendance_dialog_close)
+    void onClickCloseButton() {
+        dismiss();
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceFragment.java

@@ -2,30 +2,44 @@ package io.github.wulkanowy.ui.main.attendance;
 
 import android.os.Bundle;
 import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.design.widget.Snackbar;
+import android.support.design.widget.TabLayout;
+import android.support.v4.view.ViewPager;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
 import javax.inject.Inject;
 
+import butterknife.BindView;
 import butterknife.ButterKnife;
 import io.github.wulkanowy.R;
 import io.github.wulkanowy.di.component.FragmentComponent;
 import io.github.wulkanowy.ui.base.BaseFragment;
 import io.github.wulkanowy.ui.main.OnFragmentIsReadyListener;
+import io.github.wulkanowy.ui.main.TabsData;
 
 public class AttendanceFragment extends BaseFragment implements AttendanceContract.View {
 
+    private static final String CURRENT_ITEM_KEY = "CurrentItem";
+
+    @BindView(R.id.attendance_fragment_viewpager)
+    ViewPager viewPager;
+
+    @BindView(R.id.attendance_fragment_tab_layout)
+    TabLayout tabLayout;
+
+    @Inject
+    AttendancePagerAdapter pagerAdapter;
+
     @Inject
     AttendanceContract.Presenter presenter;
 
-    public AttendanceFragment() {
+    @Nullable
-        // empty constructor for fragment
-    }
-
     @Override
-    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
-                             Bundle savedInstanceState) {
+                             @Nullable Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_attendance, container, false);
 
         FragmentComponent component = getFragmentComponent();
@@ -33,6 +47,10 @@ public class AttendanceFragment extends BaseFragment implements AttendanceContra
             component.inject(this);
             setButterKnife(ButterKnife.bind(this, view));
             presenter.onStart(this, (OnFragmentIsReadyListener) getActivity());
+
+            if (savedInstanceState != null) {
+                presenter.setRestoredPosition(savedInstanceState.getInt(CURRENT_ITEM_KEY));
+            }
         }
 
         return view;
@@ -42,18 +60,48 @@ public class AttendanceFragment extends BaseFragment implements AttendanceContra
     public void setMenuVisibility(boolean menuVisible) {
         super.setMenuVisibility(menuVisible);
         if (presenter != null) {
-            presenter.onFragmentVisible(menuVisible);
+            presenter.onFragmentActivated(menuVisible);
         }
     }
 
+    @Override
+    public void setTabDataToAdapter(TabsData tabsData) {
+        pagerAdapter.setTabsData(tabsData);
+    }
+
+    @Override
+    public void setAdapterWithTabLayout() {
+        viewPager.setAdapter(pagerAdapter);
+        tabLayout.setupWithViewPager(viewPager);
+    }
+
+    @Override
+    public void scrollViewPagerToPosition(int position) {
+        viewPager.setCurrentItem(position, false);
+    }
+
     @Override
     public void setActivityTitle() {
-        setTitle(getString(R.string.dashboard_text));
+        setTitle(getString(R.string.attendance_text));
+    }
+
+    @Override
+    public void onError(String message) {
+        if (getActivity() != null) {
+            Snackbar.make(getActivity().findViewById(R.id.main_activity_view_pager),
+                    message, Snackbar.LENGTH_LONG).show();
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        outState.putInt(CURRENT_ITEM_KEY, viewPager.getCurrentItem());
+        super.onSaveInstanceState(outState);
     }
 
     @Override
     public void onDestroyView() {
-        super.onDestroyView();
         presenter.onDestroy();
+        super.onDestroyView();
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceHeaderItem.java

@@ -0,0 +1,161 @@
+package io.github.wulkanowy.ui.main.attendance;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+
+import java.util.List;
+
+import butterknife.BindColor;
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import eu.davidea.flexibleadapter.FlexibleAdapter;
+import eu.davidea.flexibleadapter.items.AbstractExpandableHeaderItem;
+import eu.davidea.flexibleadapter.items.IFlexible;
+import eu.davidea.viewholders.ExpandableViewHolder;
+import io.github.wulkanowy.R;
+import io.github.wulkanowy.data.db.dao.entities.Day;
+
+public class AttendanceHeaderItem
+        extends AbstractExpandableHeaderItem<AttendanceHeaderItem.HeaderViewHolder, AttendanceSubItem> {
+
+    private Day day;
+
+    AttendanceHeaderItem(Day day) {
+        this.day = day;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+
+        if (o == null || getClass() != o.getClass()) return false;
+
+        AttendanceHeaderItem that = (AttendanceHeaderItem) o;
+
+        return new EqualsBuilder()
+                .append(day, that.day)
+                .isEquals();
+    }
+
+    @Override
+    public int hashCode() {
+        return new HashCodeBuilder(17, 37)
+                .append(day)
+                .toHashCode();
+    }
+
+    @Override
+    public int getLayoutRes() {
+        return R.layout.attendance_header;
+    }
+
+    @Override
+    public HeaderViewHolder createViewHolder(View view, FlexibleAdapter<IFlexible> adapter) {
+        return new HeaderViewHolder(view, adapter);
+    }
+
+    @Override
+    public void bindViewHolder(FlexibleAdapter<IFlexible> adapter, HeaderViewHolder holder,
+                               int position, List<Object> payloads) {
+        holder.onBind(day, getSubItems());
+    }
+
+    static class HeaderViewHolder extends ExpandableViewHolder {
+
+        @BindView(R.id.attendance_header_day)
+        TextView dayName;
+
+        @BindView(R.id.attendance_header_date)
+        TextView date;
+
+        @BindView(R.id.attendance_header_description)
+        TextView description;
+
+        @BindView(R.id.attendance_header_alert_image)
+        ImageView alert;
+
+        @BindView(R.id.attendance_header_free_name)
+        TextView freeName;
+
+        @BindColor(R.color.secondary_text)
+        int secondaryColor;
+
+        @BindColor(R.color.free_day)
+        int backgroundFreeDay;
+
+        @BindColor(android.R.color.black)
+        int black;
+
+        private Context context;
+
+        HeaderViewHolder(View view, FlexibleAdapter adapter) {
+            super(view, adapter);
+            view.setOnClickListener(this);
+            ButterKnife.bind(this, view);
+            context = view.getContext();
+        }
+
+        void onBind(Day item, List<AttendanceSubItem> subItems) {
+            dayName.setText(StringUtils.capitalize(item.getDayName()));
+            date.setText(item.getDate());
+
+            int numberOfHours = countNotPresentHours(subItems);
+            description.setText((getContentView().getResources().getQuantityString(R.plurals.numberOfAbsences,
+                    numberOfHours, numberOfHours)));
+            description.setVisibility(numberOfHours > 0 ? View.VISIBLE : View.INVISIBLE);
+            alert.setVisibility(isSubItemsHasChanges(subItems) ? View.VISIBLE : View.INVISIBLE);
+            freeName.setVisibility(subItems.isEmpty() ? View.VISIBLE : View.INVISIBLE);
+            setInactiveHeader(item.getAttendanceLessons().isEmpty());
+        }
+
+
+        private void setInactiveHeader(boolean inactive) {
+            ((FrameLayout) getContentView()).setForeground(inactive ? null : getSelectableDrawable());
+            dayName.setTextColor(inactive ? secondaryColor : black);
+
+            if (inactive) {
+                getContentView().setBackgroundColor(backgroundFreeDay);
+            } else {
+                getContentView().setBackgroundDrawable(context.getResources()
+                        .getDrawable(R.drawable.ic_border));
+            }
+        }
+
+        private Drawable getSelectableDrawable() {
+            int[] attrs = new int[]{R.attr.selectableItemBackground};
+            TypedArray typedArray = context.obtainStyledAttributes(attrs);
+            Drawable drawable = typedArray.getDrawable(0);
+            typedArray.recycle();
+            return drawable;
+        }
+
+        private int countNotPresentHours(List<AttendanceSubItem> subItems) {
+            int i = 0;
+            for (AttendanceSubItem subItem : subItems) {
+                if (subItem.getLesson().getIsAbsenceUnexcused()) {
+                    i++;
+                }
+            }
+            return i;
+        }
+
+        private boolean isSubItemsHasChanges(List<AttendanceSubItem> subItems) {
+            for (AttendanceSubItem subItem : subItems) {
+                if (subItem.getLesson().getIsAbsenceUnexcused() || subItem.getLesson()
+                        .getIsUnexcusedLateness()) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendancePagerAdapter.java

@@ -0,0 +1,38 @@
+package io.github.wulkanowy.ui.main.attendance;
+
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentStatePagerAdapter;
+
+import io.github.wulkanowy.ui.main.TabsData;
+
+public class AttendancePagerAdapter extends FragmentStatePagerAdapter {
+
+    private TabsData tabsData;
+
+    public AttendancePagerAdapter(FragmentManager fragmentManager) {
+        super(fragmentManager);
+    }
+
+    void setTabsData(TabsData tabsData) {
+        this.tabsData = tabsData;
+    }
+
+    @Override
+    public Fragment getItem(int position) {
+        return tabsData.getFragment(position);
+    }
+
+
+    @Override
+    public int getCount() {
+        return tabsData.getFragmentsCount();
+    }
+
+    @Nullable
+    @Override
+    public CharSequence getPageTitle(int position) {
+        return tabsData.getTitle(position);
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendancePresenter.java

@@ -1,16 +1,33 @@
 package io.github.wulkanowy.ui.main.attendance;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import javax.inject.Inject;
 
 import io.github.wulkanowy.data.RepositoryContract;
 import io.github.wulkanowy.ui.base.BasePresenter;
 import io.github.wulkanowy.ui.main.OnFragmentIsReadyListener;
+import io.github.wulkanowy.ui.main.TabsData;
+import io.github.wulkanowy.utils.TimeUtils;
+import io.github.wulkanowy.utils.async.AbstractTask;
+import io.github.wulkanowy.utils.async.AsyncListeners;
 
 public class AttendancePresenter extends BasePresenter<AttendanceContract.View>
-        implements AttendanceContract.Presenter {
+        implements AttendanceContract.Presenter, AsyncListeners.OnFirstLoadingListener {
+
+    private AbstractTask loadingTask;
+
+    private List<String> dates = new ArrayList<>();
+
+    private TabsData tabsData = new TabsData();
 
     private OnFragmentIsReadyListener listener;
 
+    private int positionToScroll = 0;
+
+    private boolean isFirstSight = false;
+
     @Inject
     AttendancePresenter(RepositoryContract repository) {
         super(repository);
@@ -25,13 +42,68 @@ public class AttendancePresenter extends BasePresenter<AttendanceContract.View>
             getView().setActivityTitle();
         }
 
-        this.listener.onFragmentIsReady();
+        if (dates.isEmpty()) {
+            dates = TimeUtils.getMondaysFromCurrentSchoolYear();
+        }
+
+        if (positionToScroll == 0) {
+            positionToScroll = dates.indexOf(TimeUtils.getDateOfCurrentMonday(true));
+        }
+
+        if (!isFirstSight) {
+            isFirstSight = true;
+
+            loadingTask = new AbstractTask();
+            loadingTask.setOnFirstLoadingListener(this);
+            loadingTask.execute();
+        }
     }
 
     @Override
-    public void onFragmentVisible(boolean isVisible) {
+    public void onFragmentActivated(boolean isVisible) {
         if (isVisible) {
             getView().setActivityTitle();
         }
     }
+
+    @Override
+    public void onDoInBackgroundLoading() throws Exception {
+        for (String date : dates) {
+            tabsData.addTitle(date);
+            tabsData.addFragment(AttendanceTabFragment.newInstance(date));
+        }
+    }
+
+    @Override
+    public void onCanceledLoadingAsync() {
+        //do nothing
+
+    }
+
+    @Override
+    public void onEndLoadingAsync(boolean result, Exception exception) {
+        if (result) {
+            getView().setTabDataToAdapter(tabsData);
+            getView().setAdapterWithTabLayout();
+            getView().scrollViewPagerToPosition(positionToScroll);
+            listener.onFragmentIsReady();
+        }
+    }
+
+    @Override
+    public void setRestoredPosition(int position) {
+        this.positionToScroll = position;
+    }
+
+    @Override
+    public void onDestroy() {
+        isFirstSight = false;
+
+        if (loadingTask != null) {
+            loadingTask.cancel(true);
+            loadingTask = null;
+        }
+
+        super.onDestroy();
+    }
 }

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceSubItem.java

@@ -0,0 +1,121 @@
+package io.github.wulkanowy.ui.main.attendance;
+
+import android.content.Context;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.FragmentActivity;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+
+import java.util.List;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import eu.davidea.flexibleadapter.FlexibleAdapter;
+import eu.davidea.flexibleadapter.items.AbstractSectionableItem;
+import eu.davidea.flexibleadapter.items.IFlexible;
+import eu.davidea.viewholders.FlexibleViewHolder;
+import io.github.wulkanowy.R;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
+
+class AttendanceSubItem
+        extends AbstractSectionableItem<AttendanceSubItem.SubItemViewHolder, AttendanceHeaderItem> {
+
+    private AttendanceLesson lesson;
+
+    AttendanceSubItem(AttendanceHeaderItem header, AttendanceLesson lesson) {
+        super(header);
+        this.lesson = lesson;
+    }
+
+    AttendanceLesson getLesson() {
+        return lesson;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+
+        if (o == null || getClass() != o.getClass()) return false;
+
+        AttendanceSubItem that = (AttendanceSubItem) o;
+
+        return new EqualsBuilder()
+                .append(lesson, that.lesson)
+                .isEquals();
+    }
+
+    @Override
+    public int hashCode() {
+        return new HashCodeBuilder(17, 37)
+                .append(lesson)
+                .toHashCode();
+    }
+
+    @Override
+    public int getLayoutRes() {
+        return R.layout.attendance_subitem;
+    }
+
+    @Override
+    public SubItemViewHolder createViewHolder(View view, FlexibleAdapter<IFlexible> adapter) {
+        return new SubItemViewHolder(view, adapter);
+    }
+
+    @Override
+    public void bindViewHolder(FlexibleAdapter<IFlexible> adapter, SubItemViewHolder holder,
+                               int position, List<Object> payloads) {
+        holder.onBind(lesson);
+    }
+
+    static class SubItemViewHolder extends FlexibleViewHolder {
+
+        @BindView(R.id.attendance_subItem_lesson)
+        TextView lessonName;
+
+        @BindView(R.id.attendance_subItem_number)
+        TextView lessonNumber;
+
+        @BindView(R.id.attendance_subItem_description)
+        TextView lessonDescription;
+
+        @BindView(R.id.attendance_subItem_alert_image)
+        ImageView alert;
+
+        private Context context;
+
+        private AttendanceLesson item;
+
+        SubItemViewHolder(View view, FlexibleAdapter adapter) {
+            super(view, adapter);
+            ButterKnife.bind(this, view);
+            context = view.getContext();
+            view.setOnClickListener(this);
+        }
+
+        void onBind(AttendanceLesson lesson) {
+            item = lesson;
+
+            lessonName.setText(lesson.getSubject());
+            lessonNumber.setText((String.valueOf(lesson.getNumber())));
+            lessonDescription.setText(lesson.getDescription());
+            alert.setVisibility(lesson.getIsAbsenceUnexcused() || lesson.getIsUnexcusedLateness()
+                    ? View.VISIBLE : View.INVISIBLE);
+        }
+
+        @Override
+        public void onClick(View view) {
+            super.onClick(view);
+            showDialog();
+        }
+
+        private void showDialog() {
+            AttendanceDialogFragment dialogFragment = AttendanceDialogFragment.newInstance(item);
+            dialogFragment.setStyle(DialogFragment.STYLE_NO_TITLE, 0);
+            dialogFragment.show(((FragmentActivity) context).getSupportFragmentManager(), item.toString());
+        }
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceTabContract.java

@@ -0,0 +1,30 @@
+package io.github.wulkanowy.ui.main.attendance;
+
+import java.util.List;
+
+import io.github.wulkanowy.ui.base.BaseContract;
+
+public interface AttendanceTabContract {
+
+    interface View extends BaseContract.View {
+
+        void updateAdapterList(List<AttendanceHeaderItem> headerItems);
+
+        void onRefreshSuccess();
+
+        void hideRefreshingBar();
+
+        void showNoItem(boolean show);
+
+        void showProgressBar(boolean show);
+    }
+
+    interface Presenter extends BaseContract.Presenter<AttendanceTabContract.View> {
+
+        void onFragmentActivated(boolean isSelected);
+
+        void setArgumentDate(String date);
+
+        void onRefresh();
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceTabFragment.java

@@ -0,0 +1,146 @@
+package io.github.wulkanowy.ui.main.attendance;
+
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.design.widget.Snackbar;
+import android.support.v4.widget.SwipeRefreshLayout;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import java.util.List;
+
+import javax.inject.Inject;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import eu.davidea.flexibleadapter.FlexibleAdapter;
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager;
+import io.github.wulkanowy.R;
+import io.github.wulkanowy.di.component.FragmentComponent;
+import io.github.wulkanowy.ui.base.BaseFragment;
+
+public class AttendanceTabFragment extends BaseFragment implements AttendanceTabContract.View,
+        SwipeRefreshLayout.OnRefreshListener {
+
+    private static final String ARGUMENT_KEY = "date";
+
+    @BindView(R.id.attendance_tab_fragment_recycler)
+    RecyclerView recyclerView;
+
+    @BindView(R.id.attendance_tab_fragment_swipe_refresh)
+    SwipeRefreshLayout refreshLayout;
+
+    @BindView(R.id.attendance_tab_fragment_progress_bar)
+    View progressBar;
+
+    @BindView(R.id.attendance_tab_fragment_no_item_container)
+    View noItemView;
+
+    @Inject
+    AttendanceTabContract.Presenter presenter;
+
+    @Inject
+    FlexibleAdapter<AttendanceHeaderItem> adapter;
+
+    private boolean isFragmentVisible = false;
+
+    public static AttendanceTabFragment newInstance(String date) {
+        AttendanceTabFragment fragmentTab = new AttendanceTabFragment();
+
+        Bundle bundle = new Bundle();
+        bundle.putString(ARGUMENT_KEY, date);
+        fragmentTab.setArguments(bundle);
+
+        return fragmentTab;
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_attendance_tab, container, false);
+
+        FragmentComponent component = getFragmentComponent();
+        if (component != null) {
+            component.inject(this);
+            setButterKnife(ButterKnife.bind(this, view));
+
+            if (getArguments() != null) {
+                presenter.setArgumentDate(getArguments().getString(ARGUMENT_KEY));
+            }
+
+            presenter.onStart(this);
+            presenter.onFragmentActivated(isFragmentVisible);
+        }
+        return view;
+    }
+
+    @Override
+    protected void setUpOnViewCreated(View fragmentView) {
+        adapter.setAutoCollapseOnExpand(true);
+        adapter.setAutoScrollOnExpand(true);
+        adapter.expandItemsAtStartUp();
+
+        recyclerView.setLayoutManager(new SmoothScrollLinearLayoutManager(fragmentView.getContext()));
+        recyclerView.setAdapter(adapter);
+
+        refreshLayout.setColorSchemeResources(android.R.color.black);
+        refreshLayout.setOnRefreshListener(this);
+
+    }
+
+    @Override
+    public void updateAdapterList(List<AttendanceHeaderItem> headerItems) {
+        adapter.updateDataSet(headerItems);
+    }
+
+    @Override
+    public void setMenuVisibility(boolean menuVisible) {
+        super.setMenuVisibility(menuVisible);
+        isFragmentVisible = menuVisible;
+        if (presenter != null) {
+            presenter.onFragmentActivated(menuVisible);
+        }
+    }
+
+    @Override
+    public void onRefresh() {
+        presenter.onRefresh();
+    }
+
+    @Override
+    public void onRefreshSuccess() {
+        onError(R.string.timetable_refresh_success);
+    }
+
+    @Override
+    public void hideRefreshingBar() {
+        refreshLayout.setRefreshing(false);
+    }
+
+    @Override
+    public void showProgressBar(boolean show) {
+        progressBar.setVisibility(show ? View.VISIBLE : View.INVISIBLE);
+    }
+
+    @Override
+    public void showNoItem(boolean show) {
+        noItemView.setVisibility(show ? View.VISIBLE : View.INVISIBLE);
+    }
+
+    @Override
+    public void onError(String message) {
+        if (getActivity() != null) {
+            Snackbar.make(getActivity().findViewById(R.id.main_activity_view_pager),
+                    message, Snackbar.LENGTH_LONG).show();
+        }
+    }
+
+    @Override
+    public void onDestroyView() {
+        presenter.onDestroy();
+        super.onDestroyView();
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/attendance/AttendanceTabPresenter.java

@@ -0,0 +1,178 @@
+package io.github.wulkanowy.ui.main.attendance;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.inject.Inject;
+
+import io.github.wulkanowy.data.RepositoryContract;
+import io.github.wulkanowy.data.db.dao.entities.AttendanceLesson;
+import io.github.wulkanowy.data.db.dao.entities.Day;
+import io.github.wulkanowy.data.db.dao.entities.Week;
+import io.github.wulkanowy.ui.base.BasePresenter;
+import io.github.wulkanowy.utils.async.AbstractTask;
+import io.github.wulkanowy.utils.async.AsyncListeners;
+
+public class AttendanceTabPresenter extends BasePresenter<AttendanceTabContract.View>
+        implements AttendanceTabContract.Presenter, AsyncListeners.OnRefreshListener,
+        AsyncListeners.OnFirstLoadingListener {
+
+    private AbstractTask refreshTask;
+
+    private AbstractTask loadingTask;
+
+    private List<AttendanceHeaderItem> headerItems = new ArrayList<>();
+
+    private String date;
+
+    private boolean isFirstSight = false;
+
+    @Inject
+    AttendanceTabPresenter(RepositoryContract repository) {
+        super(repository);
+    }
+
+    @Override
+    public void onStart(AttendanceTabContract.View view) {
+        super.onStart(view);
+        getView().showProgressBar(true);
+        getView().showNoItem(false);
+    }
+
+    @Override
+    public void onFragmentActivated(boolean isSelected) {
+        if (!isFirstSight && isSelected && isViewAttached()) {
+            isFirstSight = true;
+
+            loadingTask = new AbstractTask();
+            loadingTask.setOnFirstLoadingListener(this);
+            loadingTask.execute();
+        } else if (!isSelected) {
+            cancelAsyncTasks();
+        }
+    }
+
+    @Override
+    public void onRefresh() {
+        if (getView().isNetworkConnected()) {
+            refreshTask = new AbstractTask();
+            refreshTask.setOnRefreshListener(this);
+            refreshTask.execute();
+        } else {
+            getView().onNoNetworkError();
+            getView().hideRefreshingBar();
+        }
+    }
+
+    @Override
+    public void onDoInBackgroundRefresh() throws Exception {
+        syncData();
+    }
+
+    @Override
+    public void onCanceledRefreshAsync() {
+        if (isViewAttached()) {
+            getView().hideRefreshingBar();
+        }
+    }
+
+    @Override
+    public void onEndRefreshAsync(boolean result, Exception exception) {
+        if (result) {
+            loadingTask = new AbstractTask();
+            loadingTask.setOnFirstLoadingListener(this);
+            loadingTask.execute();
+
+            getView().onRefreshSuccess();
+        } else {
+            getView().onError(getRepository().getErrorLoginMessage(exception));
+        }
+        getView().hideRefreshingBar();
+    }
+
+    @Override
+    public void onDoInBackgroundLoading() throws Exception {
+        Week week = getRepository().getWeek(date);
+
+        if (week == null || !week.getIsAttendanceSynced()) {
+            syncData();
+            week = getRepository().getWeek(date);
+        }
+
+        List<Day> dayList = week.getDayList();
+
+        headerItems = new ArrayList<>();
+
+        boolean isEmptyWeek = true;
+
+        for (Day day : dayList) {
+            day.resetAttendanceLessons();
+            AttendanceHeaderItem headerItem = new AttendanceHeaderItem(day);
+
+            if (isEmptyWeek) {
+                isEmptyWeek = day.getAttendanceLessons().isEmpty();
+            }
+
+            List<AttendanceLesson> lessonList = day.getAttendanceLessons();
+
+            List<AttendanceSubItem> subItems = new ArrayList<>();
+
+            for (AttendanceLesson lesson : lessonList) {
+                lesson.setDescription(getRepository().getAttendanceLessonDescription(lesson));
+                subItems.add(new AttendanceSubItem(headerItem, lesson));
+            }
+
+            headerItem.setSubItems(subItems);
+            headerItem.setExpanded(false);
+            headerItems.add(headerItem);
+        }
+
+        if (isEmptyWeek) {
+            headerItems = new ArrayList<>();
+        }
+    }
+
+    @Override
+    public void onCanceledLoadingAsync() {
+        // do nothing
+    }
+
+    @Override
+    public void onEndLoadingAsync(boolean result, Exception exception) {
+        if (headerItems.isEmpty()) {
+            getView().showNoItem(true);
+            getView().updateAdapterList(null);
+        } else {
+            getView().updateAdapterList(headerItems);
+            getView().showNoItem(false);
+        }
+        getView().showProgressBar(false);
+    }
+
+    @Override
+    public void setArgumentDate(String date) {
+        this.date = date;
+    }
+
+    private void syncData() throws Exception {
+        getRepository().syncAttendance(date);
+    }
+
+    private void cancelAsyncTasks() {
+        if (refreshTask != null) {
+            refreshTask.cancel(true);
+            refreshTask = null;
+        }
+        if (loadingTask != null) {
+            loadingTask.cancel(true);
+            loadingTask = null;
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        cancelAsyncTasks();
+        isFirstSight = false;
+        super.onDestroy();
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/grades/GradeHeaderItem.java

@@ -91,15 +91,26 @@ public class GradeHeaderItem
             numberText.setText(resources.getQuantityString(R.plurals.numberOfGradesPlurals,
                     subItems.size(), subItems.size()));
             averageText.setText(getGradesAverageString(item));
-            alertImage.setVisibility(isSubItemsRead(subItems) ? View.INVISIBLE : View.VISIBLE);
+            alertImage.setVisibility(isSubItemsReadAndSaveAlertView(subItems)
-            alertImage.setTag(item.getName());
+                    ? View.INVISIBLE : View.VISIBLE);
         }
 
-        private boolean isSubItemsRead(List<GradesSubItem> subItems) {
+        @Override
+        public void onClick(View view) {
+            super.onClick(view);
+            if (subjectName.getLineCount() == 1) {
+                subjectName.setMaxLines(3);
+            } else {
+                subjectName.setMaxLines(1);
+            }
+        }
+
+        private boolean isSubItemsReadAndSaveAlertView(List<GradesSubItem> subItems) {
             boolean isRead = true;
 
             for (GradesSubItem item : subItems) {
                 isRead = item.getGrade().getRead();
+                item.setSubjectAlertImage(alertImage);
             }
             return isRead;
         }

app/src/main/java/io/github/wulkanowy/ui/main/grades/GradesPresenter.java

@@ -71,15 +71,16 @@ public class GradesPresenter extends BasePresenter<GradesContract.View>
 
     @Override
     public void onDoInBackgroundRefresh() throws Exception {
-        getRepository().loginCurrentUser();
         getRepository().syncSubjects();
         getRepository().syncGrades();
     }
 
     @Override
     public void onCanceledRefreshAsync() {
+        if (isViewAttached()) {
             getView().hideRefreshingBar();
         }
+    }
 
     @Override
     public void onEndRefreshAsync(boolean success, Exception exception) {
@@ -108,6 +109,7 @@ public class GradesPresenter extends BasePresenter<GradesContract.View>
         headerItems = new ArrayList<>();
 
         for (Subject subject : subjectList) {
+            subject.resetGradeList();
             List<Grade> gradeList = subject.getGradeList();
 
             if (!gradeList.isEmpty()) {
@@ -138,13 +140,14 @@ public class GradesPresenter extends BasePresenter<GradesContract.View>
         } else {
             getView().updateAdapterList(headerItems);
             getView().showNoItem(false);
-            listener.onFragmentIsReady();
         }
+        listener.onFragmentIsReady();
     }
 
     @Override
     public void onDestroy() {
-        super.onDestroy();
+        isFirstSight = false;
+
         if (refreshTask != null) {
             refreshTask.cancel(true);
             refreshTask = null;
@@ -153,5 +156,6 @@ public class GradesPresenter extends BasePresenter<GradesContract.View>
             loadingTask.cancel(true);
             loadingTask = null;
         }
+        super.onDestroy();
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/grades/GradesSubItem.java

@@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.main.grades;
 
-import android.app.Activity;
 import android.content.Context;
 import android.support.v4.app.DialogFragment;
 import android.support.v4.app.FragmentActivity;
@@ -27,6 +26,8 @@ public class GradesSubItem
 
     private static int numberOfNotReadGrade;
 
+    private View subjectAlertImage;
+
     GradesSubItem(GradeHeaderItem header, Grade grade) {
         super(header);
         this.grade = grade;
@@ -36,6 +37,10 @@ public class GradesSubItem
         return grade;
     }
 
+    void setSubjectAlertImage(View subjectAlertImage) {
+        this.subjectAlertImage = subjectAlertImage;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
@@ -68,7 +73,7 @@ public class GradesSubItem
 
     @Override
     public void bindViewHolder(FlexibleAdapter adapter, SubItemViewHolder holder, int position, List payloads) {
-        holder.onBind(grade);
+        holder.onBind(grade, subjectAlertImage);
     }
 
     static class SubItemViewHolder extends FlexibleViewHolder {
@@ -85,6 +90,8 @@ public class GradesSubItem
         @BindView(R.id.grade_subitem_alert_image)
         View alert;
 
+        private View subjectAlertImage;
+
         private Context context;
 
         private Grade item;
@@ -96,8 +103,9 @@ public class GradesSubItem
             view.setOnClickListener(this);
         }
 
-        void onBind(Grade item) {
+        void onBind(Grade item, View subjectAlertImage) {
             this.item = item;
+            this.subjectAlertImage = subjectAlertImage;
 
             value.setText(item.getValue());
             value.setBackgroundResource(item.getValueColor());
@@ -119,8 +127,7 @@ public class GradesSubItem
                 numberOfNotReadGrade--;
 
                 if (numberOfNotReadGrade == 0) {
-                    ((Activity) context).findViewById(R.id.grade_fragment_container)
+                    subjectAlertImage.setVisibility(View.INVISIBLE);
-                            .findViewWithTag(item.getSubject()).setVisibility(View.INVISIBLE);
                 }
                 item.setIsNew(false);
                 item.setRead(true);

app/src/main/java/io/github/wulkanowy/ui/main/settings/SettingsFragment.java

@@ -0,0 +1,70 @@
+package io.github.wulkanowy.ui.main.settings;
+
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.support.v7.preference.PreferenceFragmentCompat;
+
+import io.github.wulkanowy.R;
+import io.github.wulkanowy.services.SyncJob;
+
+public class SettingsFragment extends PreferenceFragmentCompat
+        implements SharedPreferences.OnSharedPreferenceChangeListener {
+
+    public static final String SHARED_KEY_START_TAB = "startup_tab";
+
+    public static final String SHARED_KEY_SERVICES_ENABLE = "services_enable";
+
+    public static final String SHARED_KEY_NOTIFY_ENABLE = "notify_enable";
+
+    public static final String SHARED_KEY_SERVICES_INTERVAL = "services_interval";
+
+    public static final String SHARED_KEY_SERVICES_MOBILE_DISABLED = "services_disable_mobile";
+
+    @Override
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        addPreferencesFromResource(R.xml.preferences);
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        if (key.equals(SHARED_KEY_SERVICES_ENABLE) || key.equals(SHARED_KEY_SERVICES_INTERVAL)
+                || key.equals(SHARED_KEY_SERVICES_MOBILE_DISABLED)) {
+            launchServices(sharedPreferences.getBoolean(SHARED_KEY_SERVICES_ENABLE, true),
+                    sharedPreferences);
+        }
+    }
+
+    private void launchServices(boolean start, SharedPreferences sharedPref) {
+        if (start) {
+            int newInterval = Integer.parseInt(sharedPref.getString(SHARED_KEY_SERVICES_INTERVAL, "60"));
+            boolean useOnlyWifi = sharedPref.getBoolean(SHARED_KEY_SERVICES_MOBILE_DISABLED, false);
+
+            SyncJob.stop(getContext());
+            SyncJob.start(getContext(), newInterval, useOnlyWifi);
+        } else {
+            SyncJob.stop(getContext());
+        }
+    }
+
+    @Override
+    public void setMenuVisibility(boolean menuVisible) {
+        super.setMenuVisibility(menuVisible);
+        if (menuVisible) {
+            getActivity().setTitle(R.string.settings_text);
+        }
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        getPreferenceScreen().getSharedPreferences()
+                .registerOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        getPreferenceScreen().getSharedPreferences()
+                .unregisterOnSharedPreferenceChangeListener(this);
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableContract.java

@@ -3,6 +3,7 @@ package io.github.wulkanowy.ui.main.timetable;
 import io.github.wulkanowy.di.annotations.PerActivity;
 import io.github.wulkanowy.ui.base.BaseContract;
 import io.github.wulkanowy.ui.main.OnFragmentIsReadyListener;
+import io.github.wulkanowy.ui.main.TabsData;
 
 public interface TimetableContract {
 
@@ -16,20 +17,16 @@ public interface TimetableContract {
 
         void setAdapterWithTabLayout();
 
-        void setChildFragmentSelected(int position, boolean selected);
-
         boolean isMenuVisible();
     }
 
     @PerActivity
     interface Presenter extends BaseContract.Presenter<View> {
 
-        void onFragmentVisible(boolean isVisible);
+        void onFragmentActivated(boolean isVisible);
-
-        void onTabSelected(int position);
-
-        void onTabUnselected(int position);
 
         void onStart(View view, OnFragmentIsReadyListener listener);
+
+        void setRestoredPosition(int position);
     }
 }

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableDialogFragment.java

@@ -15,13 +15,13 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import butterknife.OnClick;
 import io.github.wulkanowy.R;
-import io.github.wulkanowy.data.db.dao.entities.Lesson;
+import io.github.wulkanowy.data.db.dao.entities.TimetableLesson;
 
 public class TimetableDialogFragment extends DialogFragment {
 
     private static final String ARGUMENT_KEY = "Item";
 
-    private Lesson lesson;
+    private TimetableLesson lesson;
 
     @BindView(R.id.timetable_dialog_lesson_value)
     TextView lessonName;
@@ -54,7 +54,7 @@ public class TimetableDialogFragment extends DialogFragment {
         //empty constructor for fragment
     }
 
-    public static TimetableDialogFragment newInstance(Lesson lesson) {
+    public static TimetableDialogFragment newInstance(TimetableLesson lesson) {
         TimetableDialogFragment dialogFragment = new TimetableDialogFragment();
 
         Bundle bundle = new Bundle();
@@ -69,7 +69,7 @@ public class TimetableDialogFragment extends DialogFragment {
     public void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         if (getArguments() != null) {
-            lesson = (Lesson) getArguments().getSerializable(ARGUMENT_KEY);
+            lesson = (TimetableLesson) getArguments().getSerializable(ARGUMENT_KEY);
         }
     }
 

app/src/main/java/io/github/wulkanowy/ui/main/timetable/TimetableFragment.java

@@ -18,8 +18,11 @@ import io.github.wulkanowy.R;
 import io.github.wulkanowy.di.component.FragmentComponent;
 import io.github.wulkanowy.ui.base.BaseFragment;
 import io.github.wulkanowy.ui.main.OnFragmentIsReadyListener;
+import io.github.wulkanowy.ui.main.TabsData;
 
-public class TimetableFragment extends BaseFragment implements TimetableContract.View, TabLayout.OnTabSelectedListener {
+public class TimetableFragment extends BaseFragment implements TimetableContract.View {
+
+    private static final String CURRENT_ITEM_KEY = "CurrentItem";
 
     @BindView(R.id.timetable_fragment_viewpager)
     ViewPager viewPager;
@@ -43,6 +46,10 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
             component.inject(this);
             setButterKnife(ButterKnife.bind(this, view));
             presenter.onStart(this, (OnFragmentIsReadyListener) getActivity());
+
+            if (savedInstanceState != null) {
+                presenter.setRestoredPosition(savedInstanceState.getInt(CURRENT_ITEM_KEY));
+            }
         }
         return view;
     }
@@ -51,25 +58,10 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
     public void setMenuVisibility(boolean menuVisible) {
         super.setMenuVisibility(menuVisible);
         if (presenter != null) {
-            presenter.onFragmentVisible(menuVisible);
+            presenter.onFragmentActivated(menuVisible);
         }
     }
 
-    @Override
-    public void onTabSelected(TabLayout.Tab tab) {
-        presenter.onTabSelected(tab.getPosition());
-    }
-
-    @Override
-    public void onTabUnselected(TabLayout.Tab tab) {
-        presenter.onTabUnselected(tab.getPosition());
-    }
-
-    @Override
-    public void onTabReselected(TabLayout.Tab tab) {
-        //do nothing
-    }
-
     @Override
     public void setTabDataToAdapter(TabsData tabsData) {
         pagerAdapter.setTabsData(tabsData);
@@ -78,14 +70,7 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
     @Override
     public void setAdapterWithTabLayout() {
         viewPager.setAdapter(pagerAdapter);
-
         tabLayout.setupWithViewPager(viewPager);
-        tabLayout.addOnTabSelectedListener(this);
-    }
-
-    @Override
-    public void setChildFragmentSelected(int position, boolean selected) {
-        ((TimetableTabFragment) pagerAdapter.getItem(position)).setSelected(selected);
     }
 
     @Override
@@ -95,7 +80,7 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
 
     @Override
     public void setActivityTitle() {
-        setTitle(getString(R.string.lessonplan_text));
+        setTitle(getString(R.string.timetable_text));
     }
 
     @Override
@@ -106,6 +91,12 @@ public class TimetableFragment extends BaseFragment implements TimetableContract
         }
     }
 
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        outState.putInt(CURRENT_ITEM_KEY, viewPager.getCurrentItem());
+        super.onSaveInstanceState(outState);
+    }
+
     @Override
     public void onDestroyView() {
         presenter.onDestroy();