Merge branch 'release/0.9.0'

2025-02-20 21:24:44 +01:00 · 2019-06-03 18:15:41 +02:00 · 2019-06-03 18:15:41 +02:00 · 713500d892
commit 713500d892
parent e4a6caa13e dfdbe374c2
141 changed files with 4564 additions and 565 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@ -7,7 +7,7 @@ references:

  container_config: &container_config
    docker:
-      - image: circleci/android:api-28
+      - image: circleci/android@sha256:5cdc8626cc6f13efe5ed982cdcdb432b0472f8740fed8743a6461e025ad6cdfc
    working_directory: *workspace_root
    environment:
      environment:
@ -35,7 +35,7 @@ jobs:
          command: ./gradlew dependencies --no-daemon --stacktrace --console=plain -PdisablePreDex || true
      - run:
          name: Initial build
-          command: ./gradlew build -x test -x lint -x fabricGenerateResourcesRelease -x packageRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew build -x test -x lint -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease -x packageRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
      - run:
          name: Run FOSSA
          command: fossa --no-ansi || true
@ -56,7 +56,7 @@ jobs:
          <<: *general_cache_key
      - run:
          name: Run lint
-          command: ./gradlew lint -x fabricGenerateResourcesRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew lint -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
      - store_artifacts:
          path: ./app/build/reports/
          destination: lint_reports/app/
@ -75,7 +75,7 @@ jobs:
          <<: *general_cache_key
      - run:
          name: Run app tests
-          command: ./gradlew :app:test :app:jacocoTestReport -x fabricGenerateResourcesRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew :app:test :app:jacocoTestReport -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease --no-daemon --stacktrace --console=plain -PdisablePreDex
      - run:
          name: Upload unit code coverage to codecov
          command: bash <(curl -s https://codecov.io/bash) -F app
@ -93,6 +93,9 @@ jobs:
    <<: *container_config
    steps:
      - *attach_workspace
+      - run:
+          name: Accept licenses
+          command: yes | sdkmanager --licenses && yes | sdkmanager --update
      - run:
          name: Setup emulator
          command: sdkmanager "system-images;android-19;default;armeabi-v7a" && echo "no" | avdmanager create avd -n test -k "system-images;android-19;default;armeabi-v7a"
@ -113,7 +116,7 @@ jobs:
            adb shell input keyevent 82
      - run:
          name: Run instrumented tests
-          command: ./gradlew clean createDebugCoverageReport jacocoTestReport --no-daemon --stacktrace --console=plain -PdisablePreDex
+          command: ./gradlew clean createPlayDebugCoverageReport jacocoTestReport --no-daemon --stacktrace --console=plain -PdisablePreDex
      - run:
          name: Collect logs from emulator
          command: adb logcat -d > ./app/build/reports/logcat_emulator.txt
@ -159,7 +162,7 @@ jobs:
            openssl aes-256-cbc -d -in ./app/upload-key-encrypted.jks -k $ENCRYPT_KEY >> ./app/upload-key.jks
      - run:
          name: Publish release
-          command: ./gradlew publish --no-daemon --stacktrace --console=plain -PenableCrashlytics -PdisablePreDex
+          command: ./gradlew publishPlayRelease --no-daemon --stacktrace --console=plain -PenableCrashlytics -PdisablePreDex

 workflows:
  version: 2
--- a/.gitignore
+++ b/.gitignore
@ -48,3 +48,4 @@ app/key.p12
 app/upload-key.jks
 *.log
 .idea/assetWizardSettings.xml
+.idea/uiDesigner.xml
--- a/.gitlab-ci.yml
+++ b/.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/debug/app-debug.apk .
+    - mv app/build/outputs/apk/fdroid/debug/app-fdroid-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 -x fabricGenerateResourcesRelease test
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease test
  artifacts:
    paths:
    - app/build/reports/tests
@ -39,7 +39,7 @@ lint:
     - .gradle
    policy: pull
  script:
-    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesRelease lint
+    - ./gradlew --no-daemon --stacktrace -x fabricGenerateResourcesFdroidRelease -x fabricGenerateResourcesPlayRelease lint
  artifacts:
    paths:
    - app/build/reports
--- a/.idea/runConfigurations.xml
+++ b/.idea/runConfigurations.xml
@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
--- a/.travis.yml
+++ b/.travis.yml
@ -12,9 +12,8 @@ cache:
    - $HOME/.gradle/wrapper/

 #branches:
-#  only:
-#    - master
-#    - 0.8.x
+# only:
+#   - develop

 android:
 licenses:
@ -48,20 +47,20 @@ before_script:
 script:
  - ./gradlew dependencies --stacktrace --daemon
  - fossa --no-ansi || true
-  - ./gradlew lint -x fabricGenerateResourcesRelease --stacktrace --daemon
-  - ./gradlew test -x fabricGenerateResourcesRelease --stacktrace --daemon
-  - ./gradlew createDebugCoverageReport --stacktrace --daemon
+  #- ./gradlew lintPlayRelease -x fabricGenerateResourcesPlayRelease --stacktrace --daemon
+  - ./gradlew testPlayDebugUnitTest -x fabricGenerateResourcesPlay --stacktrace --daemon
+  - ./gradlew createPlayDebugCoverageReport --stacktrace --daemon
  - ./gradlew jacocoTestReport --stacktrace --daemon
  - if [ -z ${SONAR_HOST+x} ]; then echo "sonar scan skipped"; else
      git fetch --unshallow;
-      ./gradlew sonarqube -x test -x lint -x fabricGenerateResourcesRelease -Dsonar.host.url=$SONAR_HOST -Dsonar.organization=$SONAR_ORG -Dsonar.login=$SONAR_KEY -Dsonar.branch.name=${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} --stacktrace --daemon;
+      ./gradlew sonarqube -x test -x lint -x fabricGenerateResourcesPlayRelease -x fabricGenerateResourcesFdroidRelease -Dsonar.host.url=$SONAR_HOST -Dsonar.organization=$SONAR_ORG -Dsonar.login=$SONAR_KEY -Dsonar.branch.name=${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} --stacktrace --daemon;
    fi
  - |
    if [ $TRAVIS_TAG ]; then
      gpg --yes --batch --passphrase=$SERVICES_ENCRYPT_KEY ./app/src/release/google-services.json.gpg;
      gpg --yes --batch --passphrase=$ENCRYPT_KEY ./app/key.p12.gpg;
      gpg --yes --batch --passphrase=$ENCRYPT_KEY ./app/upload-key.jks.gpg;
-      ./gradlew publish -PenableCrashlytics --stacktrace;
+      ./gradlew publishPlayRelease -PenableCrashlytics --stacktrace;
    fi

 after_success:
--- a/README.md
+++ b/README.md
@ -1,6 +1,5 @@
 # Wulkanowy

-[![CircleCI](https://img.shields.io/circleci/project/github/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://circleci.com/gh/wulkanowy/wulkanowy)
 [![Travis](https://img.shields.io/travis/com/wulkanowy/wulkanowy/master.svg?style=flat-square)](https://travis-ci.com/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)
@ -8,6 +7,8 @@
 [![Sonarcloud](https://sonarcloud.io/api/project_badges/measure?project=io.github.wulkanowy%3Aapp&metric=sqale_rating)](https://sonarcloud.io/dashboard?id=io.github.wulkanowy%3Aapp)
 [![FOSSA Status](https://app.fossa.com/api/projects/custom%2B5644%2Fgithub.com%2Fwulkanowy%2Fwulkanowy.svg?type=shield)](https://app.fossa.com/projects/custom%2B5644%2Fgithub.com%2Fwulkanowy%2Fwulkanowy?ref=badge_shield)
 [![Discord](https://img.shields.io/discord/390889354199040011.svg?style=flat-square)](https://discord.gg/vccAQBr)
+[![F-Droid](https://img.shields.io/f-droid/v/io.github.wulkanowy.svg)](https://f-droid.org/packages/io.github.wulkanowy/)
+[![Last release](https://img.shields.io/github/release/wulkanowy/wulkanowy.svg?logo=github)](https://github.com/wulkanowy/wulkanowy/releases)

 [Pobierz wersję beta z Google Play](https://play.google.com/store/apps/details?id=io.github.wulkanowy&amp;utm_source=vcs)

--- a/app/build.gradle
+++ b/app/build.gradle
@ -16,8 +16,8 @@ android {
        testApplicationId "io.github.tests.wulkanowy"
        minSdkVersion 15
        targetSdkVersion 28
-        versionCode 37
-        versionName "0.8.4"
+        versionCode 38
+        versionName "0.9.0"
        multiDexEnabled true
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
@ -63,6 +63,18 @@ android {
        }
    }

+    flavorDimensions "platform"
+    productFlavors {
+        play {
+            dimension "platform"
+        }
+
+        fdroid {
+            buildConfigField "boolean", "CRASHLYTICS_ENABLED", "false"
+            dimension "platform"
+        }
+    }
+
    lintOptions {
        disable 'HardwareIds'
    }
@ -85,7 +97,7 @@ play {
 }

 dependencies {
-    implementation 'io.github.wulkanowy:api:0.8.4'
+    implementation 'io.github.wulkanowy:api:0.9.0'

    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    implementation "androidx.legacy:legacy-support-v4:1.0.0"
@ -94,20 +106,20 @@ dependencies {

    implementation "androidx.cardview:cardview:1.0.0"
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    implementation "com.google.android.material:material:1.1.0-alpha05"
+    implementation "com.google.android.material:material:1.1.0-alpha07"
    implementation 'com.github.wulkanowy:MaterialChipsInput:b72fd0ee6f'
    implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0'

    implementation "androidx.work:work-runtime:2.0.1"
    implementation "androidx.work:work-rxjava2:2.0.1"

-    implementation "androidx.room:room-runtime:2.1.0-alpha07"
-    implementation "androidx.room:room-rxjava2:2.1.0-alpha07"
-    kapt "androidx.room:room-compiler:2.1.0-alpha07"
+    implementation "androidx.room:room-runtime:2.1.0-rc01"
+    implementation "androidx.room:room-rxjava2:2.1.0-rc01"
+    kapt "androidx.room:room-compiler:2.1.0-rc01"

-    implementation "com.google.dagger:dagger-android-support:2.22.1"
-    kapt "com.google.dagger:dagger-compiler:2.22.1"
-    kapt "com.google.dagger:dagger-android-processor:2.22.1"
+    implementation "com.google.dagger:dagger-android-support:2.23.1"
+    kapt "com.google.dagger:dagger-compiler:2.23.1"
+    kapt "com.google.dagger:dagger-android-processor:2.23.1"
    implementation 'com.squareup.inject:assisted-inject-annotations-dagger2:0.4.0'
    kapt 'com.squareup.inject:assisted-inject-processor-dagger2:0.4.0'

@ -116,21 +128,21 @@ dependencies {
    implementation "com.aurelhubert:ahbottomnavigation:2.3.4"
    implementation 'com.ncapdevi:frag-nav:3.2.0'

-    implementation 'com.github.pwittchen:reactivenetwork-rx2:3.0.2'
+    implementation 'com.github.pwittchen:reactivenetwork-rx2:3.0.3'
    implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
-    implementation "io.reactivex.rxjava2:rxjava:2.2.8"
+    implementation "io.reactivex.rxjava2:rxjava:2.2.9"

    implementation 'com.google.code.gson:gson:2.8.5'
    implementation "com.jakewharton.threetenabp:threetenabp:1.2.0"
    implementation "com.jakewharton.timber:timber:4.7.1"
    implementation "at.favre.lib:slf4j-timber:1.0.1"
-    implementation "com.squareup.okhttp3:logging-interceptor:3.12.1"
+    implementation "com.squareup.okhttp3:logging-interceptor:3.12.3"

    implementation "com.mikepenz:aboutlibraries:6.2.3"
    implementation 'com.takisoft.preferencex:preferencex:1.0.0'

-    implementation 'com.google.firebase:firebase-core:16.0.8'
-    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.9'
+    playImplementation 'com.google.firebase:firebase-core:16.0.9'
+    playImplementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'

    releaseImplementation 'fr.o80.chucker:library-no-op:2.0.4'

@ -139,16 +151,22 @@ dependencies {

    testImplementation "junit:junit:4.12"
    testImplementation "io.mockk:mockk:1.9.2"
-    testImplementation "org.mockito:mockito-inline:2.27.0"
-    testImplementation 'org.threeten:threetenbp:1.3.8'
+    testImplementation 'org.threeten:threetenbp:1.4.0'
+    testImplementation "org.mockito:mockito-core:2.28.2"
+    testImplementation("org.mockito:mockito-inline:2.28.2") {
+        exclude group: 'org.mockito', module: 'mockito-core'
+    }

-    androidTestImplementation 'androidx.test:core:1.1.0'
-    androidTestImplementation 'androidx.test:runner:1.1.1'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.0'
+    androidTestImplementation 'androidx.test:core:1.2.0'
+    androidTestImplementation 'androidx.test:runner:1.2.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation "io.mockk:mockk-android:1.9.2"
-    androidTestImplementation 'org.mockito:mockito-android:2.27.0'
-    androidTestImplementation "androidx.room:room-testing:2.1.0-alpha07"
+    androidTestImplementation "androidx.room:room-testing:2.1.0-rc01"
    androidTestImplementation "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
+    androidTestImplementation "org.mockito:mockito-core:2.28.2"
+    androidTestImplementation('org.mockito:mockito-android:2.28.2') {
+        exclude group: 'org.mockito', module: 'mockito-core'
+    }
 }

 apply plugin: 'com.google.gms.google-services'
--- a/app/jacoco.gradle
+++ b/app/jacoco.gradle
@ -35,11 +35,14 @@ task jacocoTestReport(type: JacocoReport) {
            dir: "$buildDir/intermediates/classes/debug",
            excludes: excludes
    ) + fileTree(
-            dir: "$buildDir/tmp/kotlin-classes/debug",
+            dir: "$buildDir/tmp/kotlin-classes/playDebug",
            excludes: excludes
    ))

-    sourceDirectories.setFrom(files("$project.projectDir/src/main/java"))
+    sourceDirectories.setFrom(files([
+            "src/main/java",
+            "src/play/java"
+    ]))
    executionData.setFrom(fileTree(
            dir: project.projectDir,
            includes: ["**/*.exec", "**/*.ec"]
--- a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/14.json
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/14.json
--- a/app/schemas/io.github.wulkanowy.data.db.AppDatabase/15.json
+++ b/app/schemas/io.github.wulkanowy.data.db.AppDatabase/15.json
--- a/app/sonarqube.gradle
+++ b/app/sonarqube.gradle
@ -29,5 +29,6 @@ sonarqube {
        property "sonar.java.coveragePlugin", "jacoco"
        property "sonar.android.lint.report", "build/reports/lint-results.xml"
        property "sonar.jacoco.reportPaths", fileTree(dir: project.projectDir, includes: ['**/*.exec', '**/*.ec'])
+        property "sonar.coverage.jacoco.xmlReportPaths", "build/reports/jacocoTestReport/jacocoTestReport.xml"
    }
 }
--- a/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/AbstractMigrationTest.kt
+++ b/app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/AbstractMigrationTest.kt
@ -22,7 +22,12 @@ abstract class AbstractMigrationTest {
    fun getMigratedRoomDatabase(): AppDatabase {
        val database = Room.databaseBuilder(ApplicationProvider.getApplicationContext(),
            AppDatabase::class.java, dbName)
-            .addMigrations(Migration12(), Migration13())
+            .addMigrations(
+                Migration12(),
+                Migration13(),
+                Migration14(),
+                Migration15()
+            )
            .build()
        // close the database and release any stream resources when the test finishes
        helper.closeWhenFinished(database)
--- a/app/src/fdroid/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt
+++ b/app/src/fdroid/java/io/github/wulkanowy/utils/CrashlyticsUtils.kt
@ -0,0 +1,17 @@
+@file:Suppress("UNUSED_PARAMETER")
+
+package io.github.wulkanowy.utils
+
+import android.content.Context
+import timber.log.Timber
+
+class CrashlyticsTree : Timber.Tree() {
+
+    override fun log(priority: Int, tag: String?, message: String, t: Throwable?) {
+        // do nothing
+    }
+}
+
+fun initCrashlytics(context: Context) {
+    // do nothing
+}
--- a/app/src/fdroid/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
+++ b/app/src/fdroid/java/io/github/wulkanowy/utils/FirebaseAnalyticsHelper.kt
@ -0,0 +1,13 @@
+package io.github.wulkanowy.utils
+
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class FirebaseAnalyticsHelper @Inject constructor() {
+
+    @Suppress("UNUSED_PARAMETER")
+    fun logEvent(name: String, vararg params: Pair<String, Any?>) {
+        // do nothing
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
+++ b/app/src/main/java/io/github/wulkanowy/WulkanowyApp.kt
@ -4,21 +4,18 @@ import android.content.Context
 import androidx.multidex.MultiDex
 import androidx.work.Configuration
 import androidx.work.WorkManager
-import com.crashlytics.android.Crashlytics
-import com.crashlytics.android.core.CrashlyticsCore
 import com.jakewharton.threetenabp.AndroidThreeTen
 import dagger.android.AndroidInjector
 import dagger.android.support.DaggerApplication
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.utils.Log
-import io.fabric.sdk.android.Fabric
-import io.github.wulkanowy.BuildConfig.CRASHLYTICS_ENABLED
 import io.github.wulkanowy.BuildConfig.DEBUG
 import io.github.wulkanowy.di.DaggerAppComponent
 import io.github.wulkanowy.services.sync.SyncWorkerFactory
 import io.github.wulkanowy.utils.ActivityLifecycleLogger
 import io.github.wulkanowy.utils.CrashlyticsTree
 import io.github.wulkanowy.utils.DebugLogTree
+import io.github.wulkanowy.utils.initCrashlytics
 import io.reactivex.exceptions.UndeliverableException
 import io.reactivex.plugins.RxJavaPlugins
 import timber.log.Timber
@ -41,7 +38,7 @@ class WulkanowyApp : DaggerApplication() {
        WorkManager.initialize(this, Configuration.Builder().setWorkerFactory(workerFactory).build())
        RxJavaPlugins.setErrorHandler(::onError)

-        initCrashlytics()
+        initCrashlytics(applicationContext)
        initLogging()
    }

@ -55,12 +52,6 @@ class WulkanowyApp : DaggerApplication() {
        registerActivityLifecycleCallbacks(ActivityLifecycleLogger())
    }

-    private fun initCrashlytics() {
-        Fabric.with(Fabric.Builder(this).kits(
-            Crashlytics.Builder().core(CrashlyticsCore.Builder().disabled(!CRASHLYTICS_ENABLED).build()).build()
-        ).debuggable(DEBUG).build())
-    }
-
    private fun onError(error: Throwable) {
        if (error is UndeliverableException && error.cause is IOException || error.cause is InterruptedException) {
            Timber.e(error.cause, "An undeliverable error occurred")
--- a/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt
@ -132,4 +132,8 @@ internal class RepositoryModule {
    @Singleton
    @Provides
    fun provideRecipientDao(database: AppDatabase) = database.recipientDao
+
+    @Singleton
+    @Provides
+    fun provideMobileDevicesDao(database: AppDatabase) = database.mobileDeviceDao
 }
--- a/app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt
@ -16,6 +16,7 @@ import io.github.wulkanowy.data.db.dao.GradeSummaryDao
 import io.github.wulkanowy.data.db.dao.HomeworkDao
 import io.github.wulkanowy.data.db.dao.LuckyNumberDao
 import io.github.wulkanowy.data.db.dao.MessagesDao
+import io.github.wulkanowy.data.db.dao.MobileDeviceDao
 import io.github.wulkanowy.data.db.dao.NoteDao
 import io.github.wulkanowy.data.db.dao.RecipientDao
 import io.github.wulkanowy.data.db.dao.ReportingUnitDao
@ -33,6 +34,7 @@ import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Homework
 import io.github.wulkanowy.data.db.entities.LuckyNumber
 import io.github.wulkanowy.data.db.entities.Message
+import io.github.wulkanowy.data.db.entities.MobileDevice
 import io.github.wulkanowy.data.db.entities.Note
 import io.github.wulkanowy.data.db.entities.Recipient
 import io.github.wulkanowy.data.db.entities.ReportingUnit
@ -44,6 +46,8 @@ import io.github.wulkanowy.data.db.migrations.Migration10
 import io.github.wulkanowy.data.db.migrations.Migration11
 import io.github.wulkanowy.data.db.migrations.Migration12
 import io.github.wulkanowy.data.db.migrations.Migration13
+import io.github.wulkanowy.data.db.migrations.Migration14
+import io.github.wulkanowy.data.db.migrations.Migration15
 import io.github.wulkanowy.data.db.migrations.Migration2
 import io.github.wulkanowy.data.db.migrations.Migration3
 import io.github.wulkanowy.data.db.migrations.Migration4
@ -73,7 +77,8 @@ import javax.inject.Singleton
        LuckyNumber::class,
        CompletedLesson::class,
        ReportingUnit::class,
-        Recipient::class
+        Recipient::class,
+        MobileDevice::class
    ],
    version = AppDatabase.VERSION_SCHEMA,
    exportSchema = true
@ -82,7 +87,7 @@ import javax.inject.Singleton
 abstract class AppDatabase : RoomDatabase() {

    companion object {
-        const val VERSION_SCHEMA = 13
+        const val VERSION_SCHEMA = 15

        fun newInstance(context: Context): AppDatabase {
            return Room.databaseBuilder(context, AppDatabase::class.java, "wulkanowy_database")
@ -101,7 +106,9 @@ abstract class AppDatabase : RoomDatabase() {
                    Migration10(),
                    Migration11(),
                    Migration12(),
-                    Migration13()
+                    Migration13(),
+                    Migration14(),
+                    Migration15()
                )
                .build()
        }
@ -140,4 +147,6 @@ abstract class AppDatabase : RoomDatabase() {
    abstract val reportingUnitDao: ReportingUnitDao

    abstract val recipientDao: RecipientDao
+
+    abstract val mobileDeviceDao: MobileDeviceDao
 }
--- a/app/src/main/java/io/github/wulkanowy/data/db/dao/MobileDeviceDao.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/dao/MobileDeviceDao.kt
@ -0,0 +1,21 @@
+package io.github.wulkanowy.data.db.dao
+
+import androidx.room.Dao
+import androidx.room.Delete
+import androidx.room.Insert
+import androidx.room.Query
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.reactivex.Maybe
+
+@Dao
+interface MobileDeviceDao {
+
+    @Insert
+    fun insertAll(devices: List<MobileDevice>)
+
+    @Delete
+    fun deleteAll(devices: List<MobileDevice>)
+
+    @Query("SELECT * FROM MobileDevices WHERE student_id = :studentId ORDER BY date DESC")
+    fun loadAll(studentId: Int): Maybe<List<MobileDevice>>
+}
--- a/app/src/main/java/io/github/wulkanowy/data/db/entities/GradeSummary.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/GradeSummary.kt
@ -13,11 +13,26 @@ data class GradeSummary(
    @ColumnInfo(name = "student_id")
    val studentId: Int,

+    val position: Int,
+
    val subject: String,

+    @ColumnInfo(name = "predicted_grade")
    val predictedGrade: String,

-    val finalGrade: String
+    @ColumnInfo(name = "final_grade")
+    val finalGrade: String,
+
+    @ColumnInfo(name = "proposed_points")
+    val proposedPoints: String,
+
+    @ColumnInfo(name = "final_points")
+    val finalPoints: String,
+
+    @ColumnInfo(name = "points_sum")
+    val pointsSum: String,
+
+    val average: Double
 ) {
    @PrimaryKey(autoGenerate = true)
    var id: Long = 0
--- a/app/src/main/java/io/github/wulkanowy/data/db/entities/MobileDevice.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/entities/MobileDevice.kt
@ -0,0 +1,25 @@
+package io.github.wulkanowy.data.db.entities
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.threeten.bp.LocalDateTime
+import java.io.Serializable
+
+@Entity(tableName = "MobileDevices")
+data class MobileDevice(
+
+    @ColumnInfo(name = "student_id")
+    val studentId: Int,
+
+    @ColumnInfo(name = "device_id")
+    val deviceId: Int,
+
+    val name: String,
+
+    val date: LocalDateTime
+) : Serializable {
+
+    @PrimaryKey(autoGenerate = true)
+    var id: Long = 0
+}
--- a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration14.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration14.kt
@ -0,0 +1,26 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration14 : Migration(13, 14) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("DROP TABLE IF EXISTS GradesSummary")
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS GradesSummary (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                semester_id INTEGER NOT NULL,
+                student_id INTEGER NOT NULL,
+                position INTEGER NOT NULL,
+                subject TEXT NOT NULL,
+                predicted_grade TEXT NOT NULL,
+                final_grade TEXT NOT NULL,
+                proposed_points TEXT NOT NULL,
+                final_points TEXT NOT NULL,
+                points_sum TEXT NOT NULL,
+                average REAL NOT NULL
+            )
+        """)
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration15.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration15.kt
@ -0,0 +1,19 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration15 : Migration(14, 15) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS MobileDevices (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                student_id INTEGER NOT NULL,
+                device_id INTEGER NOT NULL,
+                name TEXT NOT NULL,
+                date INTEGER NOT NULL
+            )
+        """)
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/data/pojos/MobileDeviceToken.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/pojos/MobileDeviceToken.kt
@ -0,0 +1,12 @@
+package io.github.wulkanowy.data.pojos
+
+data class MobileDeviceToken(
+
+    val token: String,
+
+    val symbol: String,
+
+    val pin: String,
+
+    val qr: String
+)
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/gradessummary/GradeSummaryRemote.kt
@ -18,9 +18,14 @@ class GradeSummaryRemote @Inject constructor(private val api: Api) {
                    GradeSummary(
                        semesterId = semester.semesterId,
                        studentId = semester.studentId,
+                        position = it.order,
                        subject = it.name,
                        predictedGrade = it.predicted,
-                        finalGrade = it.final
+                        finalGrade = it.final,
+                        pointsSum = it.pointsSum,
+                        proposedPoints = it.proposedPoints,
+                        finalPoints = it.finalPoints,
+                        average = it.average
                    )
                }
            }
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceLocal.kt
@ -0,0 +1,25 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import io.github.wulkanowy.data.db.dao.MobileDeviceDao
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Student
+import io.reactivex.Maybe
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceLocal @Inject constructor(private val mobileDb: MobileDeviceDao) {
+
+    fun saveDevices(devices: List<MobileDevice>) {
+        mobileDb.insertAll(devices)
+    }
+
+    fun deleteDevices(devices: List<MobileDevice>) {
+        mobileDb.deleteAll(devices)
+    }
+
+    fun getDevices(semester: Semester): Maybe<List<MobileDevice>> {
+        return mobileDb.loadAll(semester.studentId).filter { it.isNotEmpty() }
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRemote.kt
@ -0,0 +1,47 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import io.github.wulkanowy.api.Api
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.utils.toLocalDateTime
+import io.reactivex.Single
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceRemote @Inject constructor(private val api: Api) {
+
+    fun getDevices(semester: Semester): Single<List<MobileDevice>> {
+        return Single.just(api.apply { diaryId = semester.diaryId })
+            .flatMap { api.getRegisteredDevices() }
+            .map { devices ->
+                devices.map {
+                    MobileDevice(
+                        studentId = semester.studentId,
+                        date = it.date.toLocalDateTime(),
+                        deviceId = it.id,
+                        name = it.name
+                    )
+                }
+            }
+    }
+
+    fun unregisterDevice(semester: Semester, device: MobileDevice): Single<Boolean> {
+        return Single.just(api.apply { diaryId = semester.diaryId })
+            .flatMap { api.unregisterDevice(device.deviceId) }
+    }
+
+    fun getToken(semester: Semester): Single<MobileDeviceToken> {
+        return Single.just(api.apply { diaryId = semester.diaryId })
+            .flatMap { api.getToken() }
+            .map {
+                MobileDeviceToken(
+                    token = it.token,
+                    symbol = it.symbol,
+                    pin = it.pin,
+                    qr = it.qrCodeImage
+                )
+            }
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepository.kt
@ -0,0 +1,44 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
+import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.utils.uniqueSubtract
+import io.reactivex.Single
+import java.net.UnknownHostException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceRepository @Inject constructor(
+    private val settings: InternetObservingSettings,
+    private val local: MobileDeviceLocal,
+    private val remote: MobileDeviceRemote
+) {
+
+    fun getDevices(semester: Semester, forceRefresh: Boolean = false): Single<List<MobileDevice>> {
+        return local.getDevices(semester).filter { !forceRefresh }
+            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
+                .flatMap {
+                    if (it) remote.getDevices(semester)
+                    else Single.error(UnknownHostException())
+                }.flatMap { new ->
+                    local.getDevices(semester).toSingle(emptyList())
+                        .doOnSuccess { old ->
+                            local.deleteDevices(old uniqueSubtract new)
+                            local.saveDevices(new uniqueSubtract old)
+                        }
+                }
+            ).flatMap { local.getDevices(semester).toSingle(emptyList()) }
+    }
+
+    fun unregisterDevice(semester: Semester, device: MobileDevice): Single<Boolean> {
+        return remote.unregisterDevice(semester, device)
+    }
+
+    fun getToken(semester: Semester): Single<MobileDeviceToken> {
+        return remote.getToken(semester)
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/preferences/PreferencesRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/preferences/PreferencesRepository.kt
@ -40,7 +40,7 @@ class PreferencesRepository @Inject constructor(

    val servicesOnlyWifiKey: String = context.getString(R.string.pref_key_services_wifi_only)
    val isServicesOnlyWifi: Boolean
-        get() = sharedPref.getBoolean(servicesOnlyWifiKey, true)
+        get() = sharedPref.getBoolean(servicesOnlyWifiKey, false)

    val isNotificationsEnable: Boolean
        get() = sharedPref.getBoolean(context.getString(R.string.pref_key_notifications_enable), true)
--- a/app/src/main/java/io/github/wulkanowy/di/AppModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/di/AppModule.kt
@ -2,7 +2,6 @@ package io.github.wulkanowy.di

 import android.appwidget.AppWidgetManager
 import android.content.Context
-import com.google.firebase.analytics.FirebaseAnalytics
 import dagger.Module
 import dagger.Provides
 import eu.davidea.flexibleadapter.FlexibleAdapter
@ -27,10 +26,6 @@ internal class AppModule {
    @Provides
    fun provideFlexibleAdapter() = FlexibleAdapter<AbstractFlexibleItem<*>>(null, null, true)

-    @Singleton
-    @Provides
-    fun provideFirebaseAnalytics(context: Context) = FirebaseAnalytics.getInstance(context)
-
    @Singleton
    @Provides
    fun provideAppWidgetManager(context: Context): AppWidgetManager = AppWidgetManager.getInstance(context)
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BaseActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseActivity.kt
@ -1,8 +1,11 @@
 package io.github.wulkanowy.ui.base

+import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
+import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
 import android.os.Bundle
 import android.view.View
 import android.widget.Toast
+import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.fragment.app.Fragment
@ -12,10 +15,12 @@ import dagger.android.AndroidInjection
 import dagger.android.DispatchingAndroidInjector
 import dagger.android.support.HasSupportFragmentInjector
 import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.modules.login.LoginActivity
 import io.github.wulkanowy.utils.FragmentLifecycleLogger
 import javax.inject.Inject

-abstract class BaseActivity : AppCompatActivity(), BaseView, HasSupportFragmentInjector {
+abstract class BaseActivity<T : BasePresenter<out BaseView>> : AppCompatActivity(), BaseView,
+    HasSupportFragmentInjector {

    @Inject
    lateinit var supportFragmentInjector: DispatchingAndroidInjector<Fragment>
@ -28,6 +33,8 @@ abstract class BaseActivity : AppCompatActivity(), BaseView, HasSupportFragmentI

    protected var messageContainer: View? = null

+    abstract var presenter: T
+
    public override fun onCreate(savedInstanceState: Bundle?) {
        AndroidInjection.inject(this)
        themeManager.applyTheme(this)
@ -51,9 +58,24 @@ abstract class BaseActivity : AppCompatActivity(), BaseView, HasSupportFragmentI
        else Toast.makeText(this, text, Toast.LENGTH_LONG).show()
    }

+    override fun showExpiredDialog() {
+        AlertDialog.Builder(this)
+            .setTitle(R.string.main_session_expired)
+            .setMessage(R.string.main_session_relogin)
+            .setPositiveButton(R.string.main_log_in) { _, _ -> presenter.onExpiredLoginSelected() }
+            .setNegativeButton(android.R.string.cancel) { _, _ -> }
+            .show()
+    }
+
+    override fun openClearLoginView() {
+        startActivity(LoginActivity.getStartIntent(this)
+            .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
+    }
+
    override fun onDestroy() {
        super.onDestroy()
        invalidateOptionsMenu()
+        presenter.onDetachView()
    }

    override fun supportFragmentInjector() = supportFragmentInjector
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseFragment.kt
@ -18,7 +18,7 @@ abstract class BaseFragment : DaggerFragment(), BaseView {
                }
                .show()
        } else {
-            (activity as? BaseActivity)?.showError(text, error)
+            (activity as? BaseActivity<*>)?.showError(text, error)
        }
    }

@ -26,7 +26,15 @@ abstract class BaseFragment : DaggerFragment(), BaseView {
        if (messageContainer != null) {
            Snackbar.make(messageContainer!!, text, LENGTH_LONG).show()
        } else {
-            (activity as? BaseActivity)?.showMessage(text)
+            (activity as? BaseActivity<*>)?.showMessage(text)
        }
    }
+
+    override fun showExpiredDialog() {
+        (activity as? BaseActivity<*>)?.showExpiredDialog()
+    }
+
+    override fun openClearLoginView() {
+        (activity as? BaseActivity<*>)?.openClearLoginView()
+    }
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BasePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BasePresenter.kt
@ -1,8 +1,16 @@
 package io.github.wulkanowy.ui.base

+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.utils.SchedulersProvider
+import io.reactivex.Completable
 import io.reactivex.disposables.CompositeDisposable
+import timber.log.Timber

-open class BasePresenter<T : BaseView>(private val errorHandler: ErrorHandler) {
+open class BasePresenter<T : BaseView>(
+    protected val errorHandler: ErrorHandler,
+    protected val studentRepository: StudentRepository,
+    protected val schedulers: SchedulersProvider
+) {

    val disposable = CompositeDisposable()

@ -10,7 +18,33 @@ open class BasePresenter<T : BaseView>(private val errorHandler: ErrorHandler) {

    open fun onAttachView(view: T) {
        this.view = view
-        errorHandler.showErrorMessage = { text, error -> view.showError(text, error) }
+        errorHandler.apply {
+            showErrorMessage = view::showError
+            onSessionExpired = view::showExpiredDialog
+            onNoCurrentStudent = view::openClearLoginView
+        }
+    }
+
+    fun onExpiredLoginSelected() {
+        Timber.i("Attempt to switch the student after the session expires")
+        disposable.add(studentRepository.getCurrentStudent(false)
+            .flatMapCompletable { studentRepository.logoutStudent(it) }
+            .andThen(studentRepository.getSavedStudents(false))
+            .flatMapCompletable {
+                if (it.isNotEmpty()) {
+                    Timber.i("Switching current student")
+                    studentRepository.switchStudent(it[0])
+                } else Completable.complete()
+            }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .subscribe({
+                Timber.i("Switch student result: Open login view")
+                view?.openClearLoginView()
+            }, {
+                Timber.i("Switch student result: An exception occurred")
+                errorHandler.dispatch(it)
+            }))
    }

    open fun onDetachView() {
--- a/app/src/main/java/io/github/wulkanowy/ui/base/BaseView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/BaseView.kt
@ -5,4 +5,8 @@ interface BaseView {
    fun showError(text: String, error: Throwable)

    fun showMessage(text: String)
+
+    fun showExpiredDialog()
+
+    fun openClearLoginView()
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/base/ErrorHandler.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/ErrorHandler.kt
@ -5,7 +5,10 @@ import com.readystatesoftware.chuck.api.ChuckCollector
 import io.github.wulkanowy.R
 import io.github.wulkanowy.api.interceptor.FeatureDisabledException
 import io.github.wulkanowy.api.interceptor.ServiceUnavailableException
+import io.github.wulkanowy.api.login.BadCredentialsException
 import io.github.wulkanowy.api.login.NotLoggedInException
+import io.github.wulkanowy.data.exceptions.NoCurrentStudentException
+import io.github.wulkanowy.utils.security.ScramblerException
 import timber.log.Timber
 import java.net.SocketTimeoutException
 import java.net.UnknownHostException
@ -15,6 +18,10 @@ open class ErrorHandler @Inject constructor(protected val resources: Resources,

    var showErrorMessage: (String, Throwable) -> Unit = { _, _ -> }

+    var onSessionExpired: () -> Unit = {}
+
+    var onNoCurrentStudent: () -> Unit = {}
+
    fun dispatch(error: Throwable) {
        chuckCollector.onError(error.javaClass.simpleName, error)
        Timber.e(error, "An exception occurred while the Wulkanowy was running")
@ -22,17 +29,23 @@ open class ErrorHandler @Inject constructor(protected val resources: Resources,
    }

    protected open fun proceed(error: Throwable) {
-        showErrorMessage((when (error) {
-            is UnknownHostException -> resources.getString(R.string.error_no_internet)
-            is SocketTimeoutException -> resources.getString(R.string.error_timeout)
-            is NotLoggedInException -> resources.getString(R.string.error_login_failed)
-            is ServiceUnavailableException -> resources.getString(R.string.error_service_unavailable)
-            is FeatureDisabledException -> resources.getString(R.string.error_feature_disabled)
-            else -> resources.getString(R.string.error_unknown)
-        }), error)
+        resources.run {
+            when (error) {
+                is UnknownHostException -> showErrorMessage(getString(R.string.error_no_internet), error)
+                is SocketTimeoutException -> showErrorMessage(getString(R.string.error_timeout), error)
+                is NotLoggedInException -> showErrorMessage(getString(R.string.error_login_failed), error)
+                is ServiceUnavailableException -> showErrorMessage(getString(R.string.error_service_unavailable), error)
+                is FeatureDisabledException -> showErrorMessage(getString(R.string.error_feature_disabled), error)
+                is ScramblerException, is BadCredentialsException -> onSessionExpired()
+                is NoCurrentStudentException -> onNoCurrentStudent()
+                else -> showErrorMessage(getString(R.string.error_unknown), error)
+            }
+        }
    }

    open fun clear() {
        showErrorMessage = { _, _ -> }
+        onSessionExpired = {}
+        onNoCurrentStudent = {}
    }
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionFragment.kt
@ -1,21 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
-import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
-import io.github.wulkanowy.ui.base.BaseFragment
-import io.github.wulkanowy.ui.modules.login.LoginActivity
-import io.github.wulkanowy.ui.modules.main.MainActivity
-
-open class BaseSessionFragment : BaseFragment(), BaseSessionView {
-
-    override fun showExpiredDialog() {
-        (activity as? MainActivity)?.showExpiredDialog()
-    }
-
-    override fun openLoginView() {
-        activity?.also {
-            startActivity(LoginActivity.getStartIntent(it)
-                .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
-        }
-    }
-}
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionPresenter.kt
@ -1,15 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import io.github.wulkanowy.ui.base.BasePresenter
-
-open class BaseSessionPresenter<T : BaseSessionView>(private val errorHandler: SessionErrorHandler) :
-    BasePresenter<T>(errorHandler) {
-
-    override fun onAttachView(view: T) {
-        super.onAttachView(view)
-        errorHandler.apply {
-            onDecryptionFail = { view.showExpiredDialog() }
-            onNoCurrentStudent = { view.openLoginView() }
-        }
-    }
-}
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/session/BaseSessionView.kt
@ -1,10 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import io.github.wulkanowy.ui.base.BaseView
-
-interface BaseSessionView : BaseView {
-
-    fun showExpiredDialog()
-
-    fun openLoginView()
-}
--- a/app/src/main/java/io/github/wulkanowy/ui/base/session/SessionErrorHandler.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/base/session/SessionErrorHandler.kt
@ -1,32 +0,0 @@
-package io.github.wulkanowy.ui.base.session
-
-import android.content.res.Resources
-import com.readystatesoftware.chuck.api.ChuckCollector
-import io.github.wulkanowy.data.exceptions.NoCurrentStudentException
-import io.github.wulkanowy.ui.base.ErrorHandler
-import io.github.wulkanowy.utils.security.ScramblerException
-import javax.inject.Inject
-
-open class SessionErrorHandler @Inject constructor(
-    resources: Resources,
-    chuckCollector: ChuckCollector
-) : ErrorHandler(resources, chuckCollector) {
-
-    var onDecryptionFail: () -> Unit = {}
-
-    var onNoCurrentStudent: () -> Unit = {}
-
-    override fun proceed(error: Throwable) {
-        when (error) {
-            is ScramblerException -> onDecryptionFail()
-            is NoCurrentStudentException -> onNoCurrentStudent()
-            else -> super.proceed(error)
-        }
-    }
-
-    override fun clear() {
-        super.clear()
-        onDecryptionFail = {}
-        onNoCurrentStudent = {}
-    }
-}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/about/AboutPresenter.kt
@ -4,16 +4,20 @@ import com.mikepenz.aboutlibraries.Libs
 import com.mikepenz.aboutlibraries.Libs.SpecialButton.SPECIAL1
 import com.mikepenz.aboutlibraries.Libs.SpecialButton.SPECIAL2
 import com.mikepenz.aboutlibraries.Libs.SpecialButton.SPECIAL3
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject

 class AboutPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<AboutView>(errorHandler) {
+) : BasePresenter<AboutView>(errorHandler, studentRepository, schedulers) {

    override fun onAttachView(view: AboutView) {
        super.onAttachView(view)
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountDialog.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountDialog.kt
@ -1,7 +1,5 @@
 package io.github.wulkanowy.ui.modules.account

-import android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK
-import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@ -14,6 +12,7 @@ import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseActivity
 import io.github.wulkanowy.ui.modules.login.LoginActivity
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.dialog_account.*
@ -73,16 +72,17 @@ class AccountDialog : DaggerAppCompatDialogFragment(), AccountView {
    }

    override fun openLoginView() {
-        activity?.also {
+        activity?.let {
            startActivity(LoginActivity.getStartIntent(it))
        }
    }

+    override fun showExpiredDialog() {
+        (activity as? BaseActivity<*>)?.showExpiredDialog()
+    }
+
    override fun openClearLoginView() {
-        activity?.also {
-            startActivity(LoginActivity.getStartIntent(it)
-                .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
-        }
+        (activity as? BaseActivity<*>)?.openClearLoginView()
    }

    override fun showConfirmDialog() {
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountPresenter.kt
@ -11,11 +11,11 @@ import timber.log.Timber
 import javax.inject.Inject

 class AccountPresenter @Inject constructor(
-    private val errorHandler: ErrorHandler,
-    private val studentRepository: StudentRepository,
-    private val syncManager: SyncManager,
-    private val schedulers: SchedulersProvider
-) : BasePresenter<AccountView>(errorHandler) {
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val syncManager: SyncManager
+) : BasePresenter<AccountView>(errorHandler, studentRepository, schedulers) {

    override fun onAttachView(view: AccountView) {
        super.onAttachView(view)
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/account/AccountView.kt
@ -14,8 +14,6 @@ interface AccountView : BaseView {

    fun openLoginView()

-    fun openClearLoginView()
-
    fun recreateMainView()
 }

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceFragment.kt
@ -13,7 +13,7 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Attendance
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.attendance.summary.AttendanceSummaryFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
@ -21,7 +21,7 @@ import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_attendance.*
 import javax.inject.Inject

-class AttendanceFragment : BaseSessionFragment(), AttendanceView, MainView.MainChildView, MainView.TitledView {
+class AttendanceFragment : BaseFragment(), AttendanceView, MainView.MainChildView, MainView.TitledView {

    @Inject
    lateinit var presenter: AttendancePresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendancePresenter.kt
@ -1,20 +1,14 @@
 package io.github.wulkanowy.ui.modules.attendance

-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.repositories.attendance.AttendanceRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
-import io.github.wulkanowy.utils.SchedulersProvider
-import io.github.wulkanowy.utils.isHolidays
-import io.github.wulkanowy.utils.nextSchoolDay
-import io.github.wulkanowy.utils.previousOrSameSchoolDay
-import io.github.wulkanowy.utils.previousSchoolDay
-import io.github.wulkanowy.utils.toFormattedString
+import io.github.wulkanowy.utils.*
 import org.threeten.bp.LocalDate
 import org.threeten.bp.LocalDate.now
 import org.threeten.bp.LocalDate.ofEpochDay
@ -23,14 +17,14 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject

 class AttendancePresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val attendanceRepository: AttendanceRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val prefRepository: PreferencesRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<AttendanceView>(errorHandler) {
+) : BasePresenter<AttendanceView>(errorHandler, studentRepository, schedulers) {

    lateinit var currentDate: LocalDate
        private set
@ -115,7 +109,7 @@ class AttendancePresenter @Inject constructor(
                        showEmpty(it.isEmpty())
                        showContent(it.isNotEmpty())
                    }
-                    analytics.logEvent("load_attendance", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_attendance", "items" to it.size, "force_refresh" to forceRefresh)
                }) {
                    Timber.i("Loading attendance result: An exception occurred")
                    view?.run { showEmpty(isViewEmpty) }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/AttendanceView.kt
@ -1,9 +1,9 @@
 package io.github.wulkanowy.ui.modules.attendance

 import io.github.wulkanowy.data.db.entities.Attendance
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface AttendanceView : BaseSessionView {
+interface AttendanceView : BaseView {

    val isViewEmpty: Boolean

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryFragment.kt
@ -13,13 +13,13 @@ import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.setOnItemSelectedListener
 import kotlinx.android.synthetic.main.fragment_attendance_summary.*
 import javax.inject.Inject

-class AttendanceSummaryFragment : BaseSessionFragment(), AttendanceSummaryView, MainView.TitledView {
+class AttendanceSummaryFragment : BaseFragment(), AttendanceSummaryView, MainView.TitledView {

    @Inject
    lateinit var presenter: AttendanceSummaryPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryPresenter.kt
@ -6,8 +6,8 @@ import io.github.wulkanowy.data.repositories.attendancesummary.AttendanceSummary
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.data.repositories.subject.SubjectRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.calculatePercentage
@ -19,14 +19,14 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject

 class AttendanceSummaryPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val attendanceSummaryRepository: AttendanceSummaryRepository,
    private val subjectRepository: SubjectRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
-    private val schedulers: SchedulersProvider,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<AttendanceSummaryView>(errorHandler) {
+) : BasePresenter<AttendanceSummaryView>(errorHandler, studentRepository, schedulers) {

    private var subjects = emptyList<Subject>()

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/attendance/summary/AttendanceSummaryView.kt
@ -1,8 +1,8 @@
 package io.github.wulkanowy.ui.modules.attendance.summary

-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface AttendanceSummaryView : BaseSessionView {
+interface AttendanceSummaryView : BaseView {

    val isViewEmpty: Boolean

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamFragment.kt
@ -13,14 +13,14 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Exam
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_exam.*
 import javax.inject.Inject

-class ExamFragment : BaseSessionFragment(), ExamView, MainView.MainChildView, MainView.TitledView {
+class ExamFragment : BaseFragment(), ExamView, MainView.MainChildView, MainView.TitledView {

    @Inject
    lateinit var presenter: ExamPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamPresenter.kt
@ -1,13 +1,12 @@
 package io.github.wulkanowy.ui.modules.exam

-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Exam
 import io.github.wulkanowy.data.repositories.exam.ExamRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.friday
@ -23,13 +22,13 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject

 class ExamPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val examRepository: ExamRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<ExamView>(errorHandler) {
+) : BasePresenter<ExamView>(errorHandler, studentRepository, schedulers) {

    lateinit var currentDate: LocalDate
        private set
@ -102,7 +101,7 @@ class ExamPresenter @Inject constructor(
                        showEmpty(it.isEmpty())
                        showContent(it.isNotEmpty())
                    }
-                    analytics.logEvent("load_exam", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_exam", "items" to it.size, "force_refresh" to forceRefresh)
                }) {
                    Timber.i("Loading exam result: An exception occurred")
                    view?.run { showEmpty(isViewEmpty) }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/exam/ExamView.kt
@ -1,9 +1,9 @@
 package io.github.wulkanowy.ui.modules.exam

 import io.github.wulkanowy.data.db.entities.Exam
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface ExamView : BaseSessionView {
+interface ExamView : BaseView {

    val isViewEmpty: Boolean

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProvider.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeAverageProvider.kt
@ -3,16 +3,20 @@ package io.github.wulkanowy.ui.modules.grade
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.grade.GradeRepository
+import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.utils.calcAverage
 import io.github.wulkanowy.utils.changeModifier
+import io.reactivex.Maybe
 import io.reactivex.Single
 import javax.inject.Inject

 class GradeAverageProvider @Inject constructor(
    private val preferencesRepository: PreferencesRepository,
-    private val gradeRepository: GradeRepository
+    private val gradeRepository: GradeRepository,
+    private val gradeSummaryRepository: GradeSummaryRepository
 ) {
+
    fun getGradeAverage(student: Student, semesters: List<Semester>, selectedSemesterId: Int, forceRefresh: Boolean): Single<Map<String, Double>> {
        return when (preferencesRepository.gradeAverageMode) {
            "all_year" -> getAllYearAverage(student, semesters, selectedSemesterId, forceRefresh)
@ -27,16 +31,19 @@ class GradeAverageProvider @Inject constructor(
        val plusModifier = preferencesRepository.gradePlusModifier
        val minusModifier = preferencesRepository.gradeMinusModifier

-        return gradeRepository.getGrades(student, selectedSemester, forceRefresh)
-            .flatMap { firstGrades ->
-                if (selectedSemester == firstSemester) Single.just(firstGrades)
-                else gradeRepository.getGrades(student, firstSemester)
-                    .map { secondGrades -> secondGrades + firstGrades }
-            }.map { grades ->
-                grades.map { it.changeModifier(plusModifier, minusModifier) }
-                    .groupBy { it.subject }
-                    .mapValues { it.value.calcAverage() }
-            }
+        return getAverageFromGradeSummary(selectedSemester, forceRefresh)
+            .switchIfEmpty(gradeRepository.getGrades(student, selectedSemester, forceRefresh)
+                .flatMap { firstGrades ->
+                    if (selectedSemester == firstSemester) Single.just(firstGrades)
+                    else {
+                        gradeRepository.getGrades(student, firstSemester)
+                            .map { secondGrades -> secondGrades + firstGrades }
+                    }
+                }.map { grades ->
+                    grades.map { it.changeModifier(plusModifier, minusModifier) }
+                        .groupBy { it.subject }
+                        .mapValues { it.value.calcAverage() }
+                })
    }

    private fun getOnlyOneSemesterAverage(student: Student, semesters: List<Semester>, semesterId: Int, forceRefresh: Boolean): Single<Map<String, Double>> {
@ -44,11 +51,22 @@ class GradeAverageProvider @Inject constructor(
        val plusModifier = preferencesRepository.gradePlusModifier
        val minusModifier = preferencesRepository.gradeMinusModifier

-        return gradeRepository.getGrades(student, selectedSemester, forceRefresh)
-            .map { grades ->
-                grades.map { it.changeModifier(plusModifier, minusModifier) }
-                    .groupBy { it.subject }
-                    .mapValues { it.value.calcAverage() }
+        return getAverageFromGradeSummary(selectedSemester, forceRefresh)
+            .switchIfEmpty(gradeRepository.getGrades(student, selectedSemester, forceRefresh)
+                .map { grades ->
+                    grades.map { it.changeModifier(plusModifier, minusModifier) }
+                        .groupBy { it.subject }
+                        .mapValues { it.value.calcAverage() }
+                })
+    }
+
+    private fun getAverageFromGradeSummary(selectedSemester: Semester, forceRefresh: Boolean): Maybe<Map<String, Double>> {
+        return gradeSummaryRepository.getGradesSummary(selectedSemester, forceRefresh)
+            .toMaybe()
+            .flatMap {
+                if (it.any { summary -> summary.average != .0 }) {
+                    Maybe.just(it.map { summary -> summary.subject to summary.average }.toMap())
+                } else Maybe.empty()
            }
    }
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeFragment.kt
@ -11,8 +11,8 @@ import android.view.View.VISIBLE
 import android.view.ViewGroup
 import androidx.appcompat.app.AlertDialog
 import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.base.BaseFragmentPagerAdapter
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
 import io.github.wulkanowy.ui.modules.grade.details.GradeDetailsFragment
 import io.github.wulkanowy.ui.modules.grade.statistics.GradeStatisticsFragment
 import io.github.wulkanowy.ui.modules.grade.summary.GradeSummaryFragment
@ -21,7 +21,7 @@ import io.github.wulkanowy.utils.setOnSelectPageListener
 import kotlinx.android.synthetic.main.fragment_grade.*
 import javax.inject.Inject

-class GradeFragment : BaseSessionFragment(), GradeView, MainView.MainChildView, MainView.TitledView {
+class GradeFragment : BaseFragment(), GradeView, MainView.MainChildView, MainView.TitledView {

    @Inject
    lateinit var presenter: GradePresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradePresenter.kt
@ -3,20 +3,20 @@ package io.github.wulkanowy.ui.modules.grade
 import io.github.wulkanowy.data.db.entities.Semester
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject

 class GradePresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeView>(errorHandler) {
+) : BasePresenter<GradeView>(errorHandler, studentRepository, schedulers) {

    var selectedIndex = 0
        private set
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/GradeView.kt
@ -1,8 +1,8 @@
 package io.github.wulkanowy.ui.modules.grade

-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface GradeView : BaseSessionView {
+interface GradeView : BaseView {

    val currentPageIndex: Int

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsFragment.kt
@ -17,7 +17,7 @@ import eu.davidea.flexibleadapter.items.IExpandable
 import eu.davidea.flexibleadapter.items.IFlexible
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Grade
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
 import io.github.wulkanowy.ui.modules.main.MainActivity
@ -25,7 +25,7 @@ import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_grade_details.*
 import javax.inject.Inject

-class GradeDetailsFragment : BaseSessionFragment(), GradeDetailsView, GradeView.GradeChildView {
+class GradeDetailsFragment : BaseFragment(), GradeDetailsView, GradeView.GradeChildView {

    @Inject
    lateinit var presenter: GradeDetailsPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsPresenter.kt
@ -6,8 +6,8 @@ import io.github.wulkanowy.data.repositories.grade.GradeRepository
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.ui.modules.grade.GradeAverageProvider
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
@ -16,15 +16,15 @@ import timber.log.Timber
 import javax.inject.Inject

 class GradeDetailsPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val gradeRepository: GradeRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val preferencesRepository: PreferencesRepository,
    private val averageProvider: GradeAverageProvider,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeDetailsView>(errorHandler) {
+) : BasePresenter<GradeDetailsView>(errorHandler, studentRepository, schedulers) {

    private var currentSemesterId = 0

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/details/GradeDetailsView.kt
@ -4,9 +4,9 @@ import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import eu.davidea.flexibleadapter.items.IExpandable
 import eu.davidea.flexibleadapter.items.IFlexible
 import io.github.wulkanowy.data.db.entities.Grade
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface GradeDetailsView : BaseSessionView {
+interface GradeDetailsView : BaseView {

    val isViewEmpty: Boolean

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsFragment.kt
@ -16,7 +16,7 @@ import com.github.mikephil.charting.data.PieEntry
 import com.github.mikephil.charting.formatter.ValueFormatter
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.GradeStatistics
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
 import io.github.wulkanowy.utils.getThemeAttrColor
@ -24,7 +24,7 @@ import io.github.wulkanowy.utils.setOnItemSelectedListener
 import kotlinx.android.synthetic.main.fragment_grade_statistics.*
 import javax.inject.Inject

-class GradeStatisticsFragment : BaseSessionFragment(), GradeStatisticsView, GradeView.GradeChildView {
+class GradeStatisticsFragment : BaseFragment(), GradeStatisticsView, GradeView.GradeChildView {

    @Inject
    lateinit var presenter: GradeStatisticsPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsPresenter.kt
@ -6,23 +6,23 @@ import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.data.repositories.subject.SubjectRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject

 class GradeStatisticsPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val gradeStatisticsRepository: GradeStatisticsRepository,
    private val subjectRepository: SubjectRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val preferencesRepository: PreferencesRepository,
-    private val schedulers: SchedulersProvider,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeStatisticsView>(errorHandler) {
+) : BasePresenter<GradeStatisticsView>(errorHandler, studentRepository, schedulers) {

    private var subjects = emptyList<Subject>()

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/statistics/GradeStatisticsView.kt
@ -1,9 +1,9 @@
 package io.github.wulkanowy.ui.modules.grade.statistics

 import io.github.wulkanowy.data.db.entities.GradeStatistics
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface GradeStatisticsView : BaseSessionView {
+interface GradeStatisticsView : BaseView {

    val isViewEmpty: Boolean

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryFragment.kt
@ -11,13 +11,13 @@ import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.grade.GradeView
 import kotlinx.android.synthetic.main.fragment_grade_summary.*
 import javax.inject.Inject

-class GradeSummaryFragment : BaseSessionFragment(), GradeSummaryView, GradeView.GradeChildView {
+class GradeSummaryFragment : BaseFragment(), GradeSummaryView, GradeView.GradeChildView {

    @Inject
    lateinit var presenter: GradeSummaryPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryItem.kt
@ -1,19 +1,21 @@
 package io.github.wulkanowy.ui.modules.grade.summary

+import android.annotation.SuppressLint
 import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import eu.davidea.flexibleadapter.items.IFlexible
 import eu.davidea.viewholders.FlexibleViewHolder
 import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.GradeSummary
 import kotlinx.android.extensions.LayoutContainer
 import kotlinx.android.synthetic.main.item_grade_summary.*

 class GradeSummaryItem(
-    private val title: String,
-    private val average: String,
-    private val predictedGrade: String,
-    private val finalGrade: String
+    val summary: GradeSummary,
+    private val average: String
 ) : AbstractFlexibleItem<GradeSummaryItem.ViewHolder>() {

    override fun getLayoutRes() = R.layout.item_grade_summary
@ -22,12 +24,16 @@ class GradeSummaryItem(
        return ViewHolder(view, adapter)
    }

+    @SuppressLint("SetTextI18n")
    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
        holder.run {
-            gradeSummaryItemTitle.text = title
+            gradeSummaryItemTitle.text = summary.subject
+            gradeSummaryItemPoints.text = summary.pointsSum
            gradeSummaryItemAverage.text = average
-            gradeSummaryItemPredicted.text = predictedGrade
-            gradeSummaryItemFinal.text = finalGrade
+            gradeSummaryItemPredicted.text = "${summary.predictedGrade} ${summary.proposedPoints}".trim()
+            gradeSummaryItemFinal.text = "${summary.finalGrade} ${summary.finalPoints}".trim()
+
+            gradeSummaryItemPointsContainer.visibility = if (summary.pointsSum.isBlank()) GONE else VISIBLE
        }
    }

@ -38,18 +44,16 @@ class GradeSummaryItem(
        other as GradeSummaryItem

        if (average != other.average) return false
-        if (title != other.title) return false
-        if (predictedGrade != other.predictedGrade) return false
-        if (finalGrade != other.finalGrade) return false
+        if (summary != other.summary) return false
+        if (summary.id != other.summary.id) return false

        return true
    }

    override fun hashCode(): Int {
-        var result = title.hashCode()
+        var result = summary.hashCode()
+        result = 31 * result + summary.id.hashCode()
        result = 31 * result + average.hashCode()
-        result = 31 * result + predictedGrade.hashCode()
-        result = 31 * result + finalGrade.hashCode()
        return result
    }

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryPresenter.kt
@ -4,8 +4,8 @@ import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.repositories.gradessummary.GradeSummaryRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.ui.modules.grade.GradeAverageProvider
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
@ -16,14 +16,14 @@ import java.util.Locale.FRANCE
 import javax.inject.Inject

 class GradeSummaryPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val gradeSummaryRepository: GradeSummaryRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val averageProvider: GradeAverageProvider,
-    private val schedulers: SchedulersProvider,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<GradeSummaryView>(errorHandler) {
+) : BasePresenter<GradeSummaryView>(errorHandler, studentRepository, schedulers) {

    override fun onAttachView(view: GradeSummaryView) {
        super.onAttachView(view)
@ -96,10 +96,8 @@ class GradeSummaryPresenter @Inject constructor(
                gradesSummary.filter { !checkEmpty(it, filteredAverages) }
                    .map {
                        GradeSummaryItem(
-                            title = it.subject,
-                            average = formatAverage(filteredAverages.getOrElse(it.subject) { 0.0 }, ""),
-                            predictedGrade = it.predictedGrade,
-                            finalGrade = it.finalGrade
+                            summary = it,
+                            average = formatAverage(filteredAverages.getOrElse(it.subject) { 0.0 }, "")
                        )
                    }.let {
                        it to GradeSummaryScrollableHeader(
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/grade/summary/GradeSummaryView.kt
@ -1,8 +1,8 @@
 package io.github.wulkanowy.ui.modules.grade.summary

-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface GradeSummaryView : BaseSessionView {
+interface GradeSummaryView : BaseView {

    val isViewEmpty: Boolean

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkFragment.kt
@ -10,14 +10,14 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Homework
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_homework.*
 import javax.inject.Inject

-class HomeworkFragment : BaseSessionFragment(), HomeworkView, MainView.TitledView {
+class HomeworkFragment : BaseFragment(), HomeworkView, MainView.TitledView {

    @Inject
    lateinit var presenter: HomeworkPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkPresenter.kt
@ -1,13 +1,12 @@
 package io.github.wulkanowy.ui.modules.homework

-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Homework
 import io.github.wulkanowy.data.repositories.homework.HomeworkRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.friday
@ -21,13 +20,13 @@ import java.util.concurrent.TimeUnit
 import javax.inject.Inject

 class HomeworkPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val homeworkRepository: HomeworkRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<HomeworkView>(errorHandler) {
+) : BasePresenter<HomeworkView>(errorHandler, studentRepository, schedulers) {

    lateinit var currentDate: LocalDate
        private set
@ -89,7 +88,7 @@ class HomeworkPresenter @Inject constructor(
                        showEmpty(it.isEmpty())
                        showContent(it.isNotEmpty())
                    }
-                    analytics.logEvent("load_homework", "items" to it.size, "force_refresh" to forceRefresh, START_DATE to currentDate.toFormattedString("yyyy-MM-dd"))
+                    analytics.logEvent("load_homework", "items" to it.size, "force_refresh" to forceRefresh)
                }) {
                    Timber.i("Loading homework result: An exception occurred")
                    view?.run { showEmpty(isViewEmpty()) }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/homework/HomeworkView.kt
@ -1,9 +1,9 @@
 package io.github.wulkanowy.ui.modules.homework

 import io.github.wulkanowy.data.db.entities.Homework
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface HomeworkView : BaseSessionView {
+interface HomeworkView : BaseView {

    fun initView()

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginActivity.kt
@ -14,10 +14,10 @@ import io.github.wulkanowy.utils.setOnSelectPageListener
 import kotlinx.android.synthetic.main.activity_login.*
 import javax.inject.Inject

-class LoginActivity : BaseActivity(), LoginView {
+class LoginActivity : BaseActivity<LoginPresenter>(), LoginView {

    @Inject
-    lateinit var presenter: LoginPresenter
+    override lateinit var presenter: LoginPresenter

    @Inject
    lateinit var loginAdapter: BaseFragmentPagerAdapter
@ -81,9 +81,4 @@ class LoginActivity : BaseActivity(), LoginView {
    fun onSymbolFragmentAccountLogged(students: List<Student>) {
        presenter.onSymbolViewAccountLogged(students)
    }
-
-    public override fun onDestroy() {
-        presenter.onDetachView()
-        super.onDestroy()
-    }
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/LoginPresenter.kt
@ -1,12 +1,18 @@
 package io.github.wulkanowy.ui.modules.login

 import io.github.wulkanowy.data.db.entities.Student
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject

-class LoginPresenter @Inject constructor(errorHandler: ErrorHandler) : BasePresenter<LoginView>(errorHandler) {
+class LoginPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository
+) : BasePresenter<LoginView>(errorHandler, studentRepository, schedulers) {

    override fun onAttachView(view: LoginView) {
        super.onAttachView(view)
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenter.kt
@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.login.form

-import com.google.firebase.analytics.FirebaseAnalytics.Param.SUCCESS
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.modules.login.LoginErrorHandler
@ -11,12 +10,12 @@ import javax.inject.Inject
 import javax.inject.Named

 class LoginFormPresenter @Inject constructor(
-    private val schedulers: SchedulersProvider,
-    private val errorHandler: LoginErrorHandler,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    private val loginErrorHandler: LoginErrorHandler,
    private val analytics: FirebaseAnalyticsHelper,
    @param:Named("isDebug") private val isDebug: Boolean
-) : BasePresenter<LoginFormView>(errorHandler) {
+) : BasePresenter<LoginFormView>(loginErrorHandler, studentRepository, schedulers) {

    override fun onAttachView(view: LoginFormView) {
        super.onAttachView(view)
@ -24,7 +23,7 @@ class LoginFormPresenter @Inject constructor(
            initView()
            if (isDebug) showVersion() else showPrivacyPolicy()

-            errorHandler.onBadCredentials = {
+            loginErrorHandler.onBadCredentials = {
                setErrorPassIncorrect()
                showSoftKeyboard()
                Timber.i("Entered wrong username or password")
@ -78,12 +77,12 @@ class LoginFormPresenter @Inject constructor(
            }
            .subscribe({
                Timber.i("Login result: Success")
-                analytics.logEvent("registration_form", SUCCESS to true, "students" to it.size, "endpoint" to endpoint, "error" to "No error")
+                analytics.logEvent("registration_form", "success" to true, "students" to it.size, "endpoint" to endpoint, "error" to "No error")
                view?.notifyParentAccountLogged(it)
            }, {
                Timber.i("Login result: An exception occurred")
-                analytics.logEvent("registration_form", SUCCESS to false, "students" to -1, "endpoint" to endpoint, "error" to it.localizedMessage)
-                errorHandler.dispatch(it)
+                analytics.logEvent("registration_form", "success" to false, "students" to -1, "endpoint" to endpoint, "error" to it.localizedMessage.ifEmpty { "No message" })
+                loginErrorHandler.dispatch(it)
            }))
    }

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/studentselect/LoginStudentSelectPresenter.kt
@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.login.studentselect

-import com.google.firebase.analytics.FirebaseAnalytics.Param.SUCCESS
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.data.repositories.student.StudentRepository
@ -13,22 +12,22 @@ import java.io.Serializable
 import javax.inject.Inject

 class LoginStudentSelectPresenter @Inject constructor(
-    private val errorHandler: LoginErrorHandler,
-    private val studentRepository: StudentRepository,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    private val loginErrorHandler: LoginErrorHandler,
    private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<LoginStudentSelectView>(errorHandler) {
+) : BasePresenter<LoginStudentSelectView>(loginErrorHandler, studentRepository, schedulers) {

    var students = emptyList<Student>()

-    var selectedStudents = mutableListOf<Student>()
+    private var selectedStudents = mutableListOf<Student>()

    fun onAttachView(view: LoginStudentSelectView, students: Serializable?) {
        super.onAttachView(view)
        view.run {
            initView()
            enableSignIn(false)
-            errorHandler.onStudentDuplicate = {
+            loginErrorHandler.onStudentDuplicate = {
                showMessage(it)
                Timber.i("The student already registered in the app was selected")
            }
@ -78,13 +77,13 @@ class LoginStudentSelectPresenter @Inject constructor(
                Timber.i("Registration started")
            }
            .subscribe({
-                students.forEach { analytics.logEvent("registration_student_select", SUCCESS to true, "endpoint" to it.endpoint, "symbol" to it.symbol, "error" to "No error") }
+                students.forEach { analytics.logEvent("registration_student_select", "success" to true, "endpoint" to it.endpoint, "symbol" to it.symbol, "error" to "No error") }
                Timber.i("Registration result: Success")
                view?.openMainView()
            }, { error ->
-                students.forEach { analytics.logEvent("registration_student_select", SUCCESS to false, "endpoint" to it.endpoint, "symbol" to it.symbol, "error" to error.localizedMessage) }
+                students.forEach { analytics.logEvent("registration_student_select", "success" to false, "endpoint" to it.endpoint, "symbol" to it.symbol, "error" to error.localizedMessage.ifEmpty { "No message" }) }
                Timber.i("Registration result: An exception occurred ")
-                errorHandler.dispatch(error)
+                loginErrorHandler.dispatch(error)
                view?.apply {
                    showProgress(false)
                    showContent(true)
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/login/symbol/LoginSymbolPresenter.kt
@ -1,6 +1,5 @@
 package io.github.wulkanowy.ui.modules.login.symbol

-import com.google.firebase.analytics.FirebaseAnalytics.Param.SUCCESS
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.modules.login.LoginErrorHandler
@ -12,11 +11,11 @@ import java.io.Serializable
 import javax.inject.Inject

 class LoginSymbolPresenter @Inject constructor(
-    private val studentRepository: StudentRepository,
-    private val errorHandler: LoginErrorHandler,
-    private val schedulers: SchedulersProvider,
+    studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    private val loginErrorHandler: LoginErrorHandler,
    private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<LoginSymbolView>(errorHandler) {
+) : BasePresenter<LoginSymbolView>(loginErrorHandler, studentRepository, schedulers) {

    var loginData: Triple<String, String, String>? = null

@ -59,7 +58,7 @@ class LoginSymbolPresenter @Inject constructor(
                    }
                }
                .subscribe({
-                    analytics.logEvent("registration_symbol", SUCCESS to true, "students" to it.size, "endpoint" to loginData?.third, "symbol" to symbol, "error" to "No error")
+                    analytics.logEvent("registration_symbol", "success" to true, "students" to it.size, "endpoint" to loginData?.third, "symbol" to symbol, "error" to "No error")
                    view?.apply {
                        if (it.isEmpty()) {
                            Timber.i("Login with symbol result: Empty student list")
@ -71,8 +70,8 @@ class LoginSymbolPresenter @Inject constructor(
                    }
                }, {
                    Timber.i("Login with symbol result: An exception occurred")
-                    analytics.logEvent("registration_symbol", SUCCESS to false, "students" to -1, "endpoint" to loginData?.third, "symbol" to symbol, "error" to it.localizedMessage)
-                    errorHandler.dispatch(it)
+                    analytics.logEvent("registration_symbol", "success" to false, "students" to -1, "endpoint" to loginData?.third, "symbol" to symbol, "error" to it.localizedMessage.ifEmpty { "No message" })
+                    loginErrorHandler.dispatch(it)
                }))
    }

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberFragment.kt
@ -6,12 +6,12 @@ import android.view.View
 import android.view.ViewGroup
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.LuckyNumber
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainView
 import kotlinx.android.synthetic.main.fragment_lucky_number.*
 import javax.inject.Inject

-class LuckyNumberFragment : BaseSessionFragment(), LuckyNumberView, MainView.TitledView {
+class LuckyNumberFragment : BaseFragment(), LuckyNumberView, MainView.TitledView {

    @Inject
    lateinit var presenter: LuckyNumberPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberPresenter.kt
@ -4,20 +4,20 @@ import io.github.wulkanowy.data.repositories.luckynumber.LuckyNumberRepository
 import io.github.wulkanowy.data.repositories.semester.SemesterRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import timber.log.Timber
 import javax.inject.Inject

 class LuckyNumberPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val luckyNumberRepository: LuckyNumberRepository,
-    private val studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<LuckyNumberView>(errorHandler) {
+) : BasePresenter<LuckyNumberView>(errorHandler, studentRepository, schedulers) {

    override fun onAttachView(view: LuckyNumberView) {
        super.onAttachView(view)
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumber/LuckyNumberView.kt
@ -1,9 +1,9 @@
 package io.github.wulkanowy.ui.modules.luckynumber

 import io.github.wulkanowy.data.db.entities.LuckyNumber
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface LuckyNumberView : BaseSessionView {
+interface LuckyNumberView : BaseView {

    fun initView()

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigureActivity.kt
@ -16,13 +16,14 @@ import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.activity_widget_configure.*
 import javax.inject.Inject

-class LuckyNumberWidgetConfigureActivity : BaseActivity(), LuckyNumberWidgetConfigureView {
+class LuckyNumberWidgetConfigureActivity : BaseActivity<LuckyNumberWidgetConfigurePresenter>(),
+    LuckyNumberWidgetConfigureView {

    @Inject
    lateinit var configureAdapter: FlexibleAdapter<AbstractFlexibleItem<*>>

    @Inject
-    lateinit var presenter: LuckyNumberWidgetConfigurePresenter
+    override lateinit var presenter: LuckyNumberWidgetConfigurePresenter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
@ -69,9 +70,4 @@ class LuckyNumberWidgetConfigureActivity : BaseActivity(), LuckyNumberWidgetConf
    override fun openLoginView() {
        startActivity(LoginActivity.getStartIntent(this))
    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        presenter.onDetachView()
-    }
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigurePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/luckynumberwidget/LuckyNumberWidgetConfigurePresenter.kt
@ -11,11 +11,11 @@ import io.github.wulkanowy.utils.SchedulersProvider
 import javax.inject.Inject

 class LuckyNumberWidgetConfigurePresenter @Inject constructor(
-    private val errorHandler: ErrorHandler,
-    private val schedulers: SchedulersProvider,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val sharedPref: SharedPrefHelper
-) : BasePresenter<LuckyNumberWidgetConfigureView>(errorHandler) {
+) : BasePresenter<LuckyNumberWidgetConfigureView>(errorHandler, studentRepository, schedulers) {

    private var appWidgetId: Int? = null

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainActivity.kt
@ -7,7 +7,6 @@ import android.content.Intent.FLAG_ACTIVITY_NEW_TASK
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
-import androidx.appcompat.app.AlertDialog
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.Fragment
@ -22,7 +21,6 @@ import io.github.wulkanowy.ui.modules.attendance.AttendanceFragment
 import io.github.wulkanowy.ui.modules.exam.ExamFragment
 import io.github.wulkanowy.ui.modules.grade.GradeFragment
 import io.github.wulkanowy.ui.modules.homework.HomeworkFragment
-import io.github.wulkanowy.ui.modules.login.LoginActivity
 import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
 import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.more.MoreFragment
@ -34,10 +32,10 @@ import io.github.wulkanowy.utils.setOnViewChangeListener
 import kotlinx.android.synthetic.main.activity_main.*
 import javax.inject.Inject

-class MainActivity : BaseActivity(), MainView {
+class MainActivity : BaseActivity<MainPresenter>(), MainView {

    @Inject
-    lateinit var presenter: MainPresenter
+    override lateinit var presenter: MainPresenter

    @Inject
    lateinit var navController: FragNavController
@ -154,15 +152,6 @@ class MainActivity : BaseActivity(), MainView {
        navController.showDialogFragment(AccountDialog.newInstance())
    }

-    fun showExpiredDialog() {
-        AlertDialog.Builder(this)
-            .setTitle(R.string.main_session_expired)
-            .setMessage(R.string.main_session_relogin)
-            .setPositiveButton(R.string.main_log_in) { _, _ -> presenter.onLoginSelected() }
-            .setNegativeButton(android.R.string.cancel) { _, _ -> }
-            .show()
-    }
-
    override fun notifyMenuViewReselected() {
        (navController.currentStack?.getOrNull(0) as? MainView.MainChildView)?.onFragmentReselected()
    }
@ -183,19 +172,9 @@ class MainActivity : BaseActivity(), MainView {
        presenter.onBackPressed { super.onBackPressed() }
    }

-    override fun openLoginView() {
-        startActivity(LoginActivity.getStartIntent(this)
-            .apply { addFlags(FLAG_ACTIVITY_CLEAR_TASK or FLAG_ACTIVITY_NEW_TASK) })
-    }
-
    override fun onSaveInstanceState(outState: Bundle) {
        super.onSaveInstanceState(outState)
        navController.onSaveInstanceState(outState)
        intent.removeExtra(EXTRA_START_MENU)
    }
-
-    override fun onDestroy() {
-        super.onDestroy()
-        presenter.onDetachView()
-    }
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt
@ -19,6 +19,9 @@ import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
 import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.message.MessageModule
 import io.github.wulkanowy.ui.modules.message.preview.MessagePreviewFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.token.MobileDeviceTokenDialog
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceModule
 import io.github.wulkanowy.ui.modules.more.MoreFragment
 import io.github.wulkanowy.ui.modules.note.NoteFragment
 import io.github.wulkanowy.ui.modules.settings.SettingsFragment
@ -97,4 +100,12 @@ abstract class MainModule {
    @PerFragment
    @ContributesAndroidInjector
    abstract fun bindAccountDialog(): AccountDialog
+
+    @PerFragment
+    @ContributesAndroidInjector(modules = [MobileDeviceModule::class])
+    abstract fun bindMobileDevices(): MobileDeviceFragment
+
+    @PerFragment
+    @ContributesAndroidInjector
+    abstract fun bindMobileDeviceDialog(): MobileDeviceTokenDialog
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainPresenter.kt
@ -1,7 +1,5 @@
 package io.github.wulkanowy.ui.modules.main

-import com.google.firebase.analytics.FirebaseAnalytics.Event.APP_OPEN
-import com.google.firebase.analytics.FirebaseAnalytics.Param.DESTINATION
 import io.github.wulkanowy.data.repositories.preferences.PreferencesRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.services.sync.SyncManager
@ -9,18 +7,17 @@ import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
-import io.reactivex.Completable
 import timber.log.Timber
 import javax.inject.Inject

 class MainPresenter @Inject constructor(
-    private val errorHandler: ErrorHandler,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val prefRepository: PreferencesRepository,
    private val syncManager: SyncManager,
-    private val schedulers: SchedulersProvider,
    private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<MainView>(errorHandler) {
+) : BasePresenter<MainView>(errorHandler, studentRepository, schedulers) {

    fun onAttachView(view: MainView, initMenu: MainView.MenuView?) {
        super.onAttachView(view)
@ -34,7 +31,7 @@ class MainPresenter @Inject constructor(
        }

        syncManager.startSyncWorker()
-        analytics.logEvent(APP_OPEN, DESTINATION to initMenu?.name)
+        analytics.logEvent("app_open", "destination" to initMenu?.name)
    }

    fun onViewChange() {
@ -80,28 +77,6 @@ class MainPresenter @Inject constructor(
        } == true
    }

-    fun onLoginSelected() {
-        Timber.i("Attempt to switch the student after the session expires")
-        disposable.add(studentRepository.getCurrentStudent(false)
-            .flatMapCompletable { studentRepository.logoutStudent(it) }
-            .andThen(studentRepository.getSavedStudents(false))
-            .flatMapCompletable {
-                if (it.isNotEmpty()) {
-                    Timber.i("Switching current student")
-                    studentRepository.switchStudent(it[0])
-                } else Completable.complete()
-            }
-            .subscribeOn(schedulers.backgroundThread)
-            .observeOn(schedulers.mainThread)
-            .subscribe({
-                Timber.i("Switch student result: Open login view")
-                view?.openLoginView()
-            }, {
-                Timber.i("Switch student result: An exception occurred")
-                errorHandler.dispatch(it)
-            }))
-    }
-
    private fun getProperViewIndexes(initMenu: MainView.MenuView?): Pair<Int, Int> {
        return when {
            initMenu?.id in 0..3 -> initMenu!!.id to -1
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/main/MainView.kt
@ -28,8 +28,6 @@ interface MainView : BaseView {

    fun popView()

-    fun openLoginView()
-
    interface MainChildView {

        fun onFragmentReselected()
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessagePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/MessagePresenter.kt
@ -1,6 +1,7 @@
 package io.github.wulkanowy.ui.modules.message

 import io.github.wulkanowy.data.db.entities.Message
+import io.github.wulkanowy.data.repositories.student.StudentRepository
 import io.github.wulkanowy.ui.base.BasePresenter
 import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.SchedulersProvider
@ -10,9 +11,10 @@ import java.util.concurrent.TimeUnit.MILLISECONDS
 import javax.inject.Inject

 class MessagePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
    errorHandler: ErrorHandler,
-    private val schedulers: SchedulersProvider
-) : BasePresenter<MessageView>(errorHandler) {
+    studentRepository: StudentRepository
+) : BasePresenter<MessageView>(errorHandler, studentRepository, schedulers) {

    override fun onAttachView(view: MessageView) {
        super.onAttachView(view)
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewFragment.kt
@ -12,7 +12,7 @@ import android.view.View.VISIBLE
 import android.view.ViewGroup
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.db.entities.Message
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.ui.modules.message.MessageFragment
@ -20,8 +20,7 @@ import io.github.wulkanowy.ui.modules.message.send.SendMessageActivity
 import kotlinx.android.synthetic.main.fragment_message_preview.*
 import javax.inject.Inject

-@SuppressLint("SetTextI18n")
-class MessagePreviewFragment : BaseSessionFragment(), MessagePreviewView, MainView.TitledView {
+class MessagePreviewFragment : BaseFragment(), MessagePreviewView, MainView.TitledView {

    @Inject
    lateinit var presenter: MessagePreviewPresenter
@ -87,10 +86,12 @@ class MessagePreviewFragment : BaseSessionFragment(), MessagePreviewView, MainVi
        messagePreviewSubject.text = subject
    }

+    @SuppressLint("SetTextI18n")
    override fun setRecipient(recipient: String) {
        messagePreviewAuthor.text = "${getString(R.string.message_to)} $recipient"
    }

+    @SuppressLint("SetTextI18n")
    override fun setSender(sender: String) {
        messagePreviewAuthor.text = "${getString(R.string.message_from)} $sender"
    }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewPresenter.kt
@ -1,11 +1,10 @@
 package io.github.wulkanowy.ui.modules.message.preview

-import com.google.firebase.analytics.FirebaseAnalytics.Param.START_DATE
 import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.repositories.message.MessageRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
 import io.github.wulkanowy.utils.toFormattedString
@ -13,12 +12,12 @@ import timber.log.Timber
 import javax.inject.Inject

 class MessagePreviewPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val messageRepository: MessageRepository,
-    private val studentRepository: StudentRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<MessagePreviewView>(errorHandler) {
+) : BasePresenter<MessagePreviewView>(errorHandler, studentRepository, schedulers) {

    var messageId = 0L

@ -53,7 +52,7 @@ class MessagePreviewPresenter @Inject constructor(
                            else setSender(it.sender)
                        }
                    }
-                    analytics.logEvent("load_message_preview", START_DATE to message.date.toFormattedString("yyyy.MM.dd"), "length" to message.content?.length)
+                    analytics.logEvent("load_message_preview", "length" to message.content?.length)
                }) {
                    Timber.i("Loading message $id preview result: An exception occurred ")
                    view?.showMessageError()
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/preview/MessagePreviewView.kt
@ -1,9 +1,9 @@
 package io.github.wulkanowy.ui.modules.message.preview

 import io.github.wulkanowy.data.db.entities.Message
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView

-interface MessagePreviewView : BaseSessionView {
+interface MessagePreviewView : BaseView {

    val noSubjectString: String

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageActivity.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessageActivity.kt
@ -19,13 +19,14 @@ import io.github.wulkanowy.utils.showSoftInput
 import kotlinx.android.synthetic.main.activity_send_message.*
 import javax.inject.Inject

-class SendMessageActivity : BaseActivity(), SendMessageView {
+class SendMessageActivity : BaseActivity<SendMessagePresenter>(), SendMessageView {

    @Inject
-    lateinit var presenter: SendMessagePresenter
+    override lateinit var presenter: SendMessagePresenter

    companion object {
        private const val EXTRA_MESSAGE = "EXTRA_MESSAGE"
+
        private const val EXTRA_REPLY = "EXTRA_REPLY"

        fun getStartIntent(context: Context) = Intent(context, SendMessageActivity::class.java)
@ -126,9 +127,4 @@ class SendMessageActivity : BaseActivity(), SendMessageView {
    override fun popView() {
        onBackPressed()
    }
-
-    override fun onDestroy() {
-        presenter.onDetachView()
-        super.onDestroy()
-    }
 }
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessagePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/send/SendMessagePresenter.kt
@ -19,16 +19,16 @@ import timber.log.Timber
 import javax.inject.Inject

 class SendMessagePresenter @Inject constructor(
-    private val errorHandler: ErrorHandler,
-    private val schedulers: SchedulersProvider,
-    private val studentRepository: StudentRepository,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val semesterRepository: SemesterRepository,
    private val messageRepository: MessageRepository,
    private val reportingUnitRepository: ReportingUnitRepository,
    private val recipientRepository: RecipientRepository,
    private val preferencesRepository: PreferencesRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BasePresenter<SendMessageView>(errorHandler) {
+) : BasePresenter<SendMessageView>(errorHandler, studentRepository, schedulers) {

    fun onAttachView(view: SendMessageView, message: Message?, reply: Boolean?) {
        super.onAttachView(view)
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabFragment.kt
@ -13,7 +13,7 @@ import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
 import io.github.wulkanowy.R
 import io.github.wulkanowy.data.repositories.message.MessageFolder
-import io.github.wulkanowy.ui.base.session.BaseSessionFragment
+import io.github.wulkanowy.ui.base.BaseFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.message.MessageItem
@ -22,7 +22,7 @@ import io.github.wulkanowy.utils.setOnItemClickListener
 import kotlinx.android.synthetic.main.fragment_message_tab.*
 import javax.inject.Inject

-class MessageTabFragment : BaseSessionFragment(), MessageTabView {
+class MessageTabFragment : BaseFragment(), MessageTabView {

    @Inject
    lateinit var presenter: MessageTabPresenter
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabPresenter.kt
@ -5,8 +5,8 @@ import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.repositories.message.MessageFolder
 import io.github.wulkanowy.data.repositories.message.MessageRepository
 import io.github.wulkanowy.data.repositories.student.StudentRepository
-import io.github.wulkanowy.ui.base.session.BaseSessionPresenter
-import io.github.wulkanowy.ui.base.session.SessionErrorHandler
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
 import io.github.wulkanowy.ui.modules.message.MessageItem
 import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
 import io.github.wulkanowy.utils.SchedulersProvider
@ -14,12 +14,12 @@ import timber.log.Timber
 import javax.inject.Inject

 class MessageTabPresenter @Inject constructor(
-    private val errorHandler: SessionErrorHandler,
-    private val schedulers: SchedulersProvider,
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
    private val messageRepository: MessageRepository,
-    private val studentRepository: StudentRepository,
    private val analytics: FirebaseAnalyticsHelper
-) : BaseSessionPresenter<MessageTabView>(errorHandler) {
+) : BasePresenter<MessageTabView>(errorHandler, studentRepository, schedulers) {

    lateinit var folder: MessageFolder

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/message/tab/MessageTabView.kt
@ -1,10 +1,10 @@
 package io.github.wulkanowy.ui.modules.message.tab

 import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
-import io.github.wulkanowy.ui.base.session.BaseSessionView
+import io.github.wulkanowy.ui.base.BaseView
 import io.github.wulkanowy.ui.modules.message.MessageItem

-interface MessageTabView : BaseSessionView {
+interface MessageTabView : BaseView {

    val noSubjectString: String

--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceAdapter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceAdapter.kt
@ -0,0 +1,10 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.IFlexible
+import io.github.wulkanowy.data.db.entities.MobileDevice
+
+class MobileDeviceAdapter<T : IFlexible<*>> : FlexibleAdapter<T>(null, null, true) {
+
+    var onDeviceUnregisterListener: (MobileDevice, position: Int) -> Unit = {  _, _ -> }
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceFragment.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceFragment.kt
@ -0,0 +1,114 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.helpers.EmptyViewHelper
+import eu.davidea.flexibleadapter.helpers.UndoHelper
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.main.MainActivity
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.mobiledevice.token.MobileDeviceTokenDialog
+import kotlinx.android.synthetic.main.fragment_mobile_device.*
+import javax.inject.Inject
+
+class MobileDeviceFragment : BaseFragment(), MobileDeviceView, MainView.TitledView {
+
+    @Inject
+    lateinit var presenter: MobileDevicePresenter
+
+    @Inject
+    lateinit var devicesAdapter: MobileDeviceAdapter<AbstractFlexibleItem<*>>
+
+    companion object {
+        fun newInstance() = MobileDeviceFragment()
+    }
+
+    override val titleStringId: Int
+        get() = R.string.mobile_devices_title
+
+    override val isViewEmpty: Boolean
+        get() = devicesAdapter.isEmpty
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_mobile_device, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        messageContainer = mobileDevicesRecycler
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        mobileDevicesRecycler.run {
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+            adapter = devicesAdapter
+            addItemDecoration(FlexibleItemDecoration(context)
+                .withDefaultDivider()
+                .withDrawDividerOnLastItem(false)
+            )
+        }
+        EmptyViewHelper.create(devicesAdapter, mobileDevicesEmpty)
+        mobileDevicesSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        mobileDeviceAddButton.setOnClickListener { presenter.onRegisterDevice() }
+        devicesAdapter.run {
+            isPermanentDelete = false
+            onDeviceUnregisterListener = { device, position ->
+                val onActionListener = object : UndoHelper.OnActionListener {
+                    override fun onActionConfirmed(action: Int, event: Int) {
+                        presenter.onUnregister(device)
+                    }
+
+                    override fun onActionCanceled(action: Int, positions: MutableList<Int>?) {
+                        devicesAdapter.restoreDeletedItems()
+                    }
+                }
+                UndoHelper(devicesAdapter, onActionListener)
+                    .withConsecutive(false)
+                    .withAction(UndoHelper.Action.REMOVE)
+                    .start(listOf(position), mobileDevicesRecycler, R.string.mobile_device_removed, R.string.all_undo, 3000)
+            }
+        }
+    }
+
+    override fun updateData(data: List<MobileDeviceItem>) {
+        devicesAdapter.updateDataSet(data)
+    }
+
+    override fun clearData() {
+        devicesAdapter.clear()
+    }
+
+    override fun hideRefresh() {
+        mobileDevicesSwipe.isRefreshing = false
+    }
+
+    override fun showProgress(show: Boolean) {
+        mobileDevicesProgress.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun enableSwipe(enable: Boolean) {
+        mobileDevicesSwipe.isEnabled = enable
+    }
+
+    override fun showContent(show: Boolean) {
+        mobileDevicesRecycler.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showTokenDialog() {
+        (activity as? MainActivity)?.showDialogFragment(MobileDeviceTokenDialog.newInstance())
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceItem.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceItem.kt
@ -0,0 +1,53 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import android.view.View
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.utils.toFormattedString
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_mobile_device.*
+
+class MobileDeviceItem(val device: MobileDevice) : AbstractFlexibleItem<MobileDeviceItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_mobile_device
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
+        return ViewHolder(view, adapter)
+    }
+
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
+        holder.apply {
+            mobileDeviceItemDate.text = device.date.toFormattedString("dd.MM.yyyy HH:mm:ss")
+            mobileDeviceItemName.text = device.name
+            mobileDeviceItemUnregister.setOnClickListener {
+                (adapter as MobileDeviceAdapter).onDeviceUnregisterListener(device, holder.flexibleAdapterPosition)
+            }
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as MobileDeviceItem
+
+        if (device.id != other.device.id) return false
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = device.hashCode()
+        result = 31 * result + device.id.toInt()
+        return result
+    }
+
+    class ViewHolder(val view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
+
+        override val containerView: View
+            get() = contentView
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceModule.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceModule.kt
@ -0,0 +1,12 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import dagger.Module
+import dagger.Provides
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+
+@Module
+class MobileDeviceModule {
+
+    @Provides
+    fun provideMobileDeviceFlexibleAdapter() = MobileDeviceAdapter<AbstractFlexibleItem<*>>()
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDevicePresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDevicePresenter.kt
@ -0,0 +1,94 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class MobileDevicePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val mobileDeviceRepository: MobileDeviceRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<MobileDeviceView>(errorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: MobileDeviceView) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("Mobile device view was initialized")
+        loadData()
+    }
+
+    fun onSwipeRefresh() {
+        loadData(true)
+    }
+
+    private fun loadData(forceRefresh: Boolean = false) {
+        Timber.i("Loading mobile devices data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { mobileDeviceRepository.getDevices(it, forceRefresh) }
+            .map { items -> items.map { MobileDeviceItem(it) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    hideRefresh()
+                    showProgress(false)
+                    enableSwipe(true)
+                }
+            }.subscribe({
+                Timber.i("Loading mobile devices result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent(it.isNotEmpty())
+                }
+                analytics.logEvent("load_devices", "items" to it.size, "force_refresh" to forceRefresh)
+            }) {
+                Timber.i("Loading mobile devices result: An exception occurred")
+                errorHandler.dispatch(it)
+            })
+    }
+
+    fun onRegisterDevice() {
+        view?.showTokenDialog()
+    }
+
+    fun onUnregister(device: MobileDevice) {
+        Timber.i("Unregister device started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { semester ->
+                mobileDeviceRepository.unregisterDevice(semester, device)
+                .flatMap { mobileDeviceRepository.getDevices(semester, it) }
+            }
+            .map { items -> items.map { MobileDeviceItem(it) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    showProgress(false)
+                    enableSwipe(true)
+                }
+            }
+            .subscribe({
+                Timber.i("Unregister device result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent(it.isNotEmpty())
+                }
+            }) {
+                Timber.i("Unregister device result: An exception occurred")
+                errorHandler.dispatch(it)
+            }
+        )
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceView.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceView.kt
@ -0,0 +1,24 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import io.github.wulkanowy.ui.base.BaseView
+
+interface MobileDeviceView : BaseView {
+
+    val isViewEmpty: Boolean
+
+    fun initView()
+
+    fun updateData(data: List<MobileDeviceItem>)
+
+    fun hideRefresh()
+
+    fun clearData()
+
+    fun showProgress(show: Boolean)
+
+    fun enableSwipe(enable: Boolean)
+
+    fun showContent(show: Boolean)
+
+    fun showTokenDialog()
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenDialog.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenDialog.kt
@ -0,0 +1,89 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import android.graphics.BitmapFactory
+import android.os.Bundle
+import android.util.Base64
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import android.widget.Toast
+import dagger.android.support.DaggerDialogFragment
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRemote
+import io.github.wulkanowy.ui.base.BaseActivity
+import kotlinx.android.synthetic.main.dialog_mobile_device.*
+import javax.inject.Inject
+
+class MobileDeviceTokenDialog : DaggerDialogFragment(), MobileDeviceTokenVIew {
+
+    @Inject
+    lateinit var presenter: MobileDeviceTokenPresenter
+
+    companion object {
+        fun newInstance(): MobileDeviceTokenDialog = MobileDeviceTokenDialog()
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setStyle(STYLE_NO_TITLE, 0)
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.dialog_mobile_device, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        mobileDeviceDialogClose.setOnClickListener { dismiss() }
+    }
+
+    override fun updateData(token: MobileDeviceToken) {
+        mobileDeviceDialogToken.text = token.token
+        mobileDeviceDialogSymbol.text = token.symbol
+        mobileDeviceDialogPin.text = token.pin
+
+        mobileDeviceQr.setImageBitmap(Base64.decode(token.qr, Base64.DEFAULT).let {
+            BitmapFactory.decodeByteArray(it, 0, it.size)
+        })
+    }
+
+    override fun hideLoading() {
+        mobileDeviceDialogProgress.visibility = GONE
+    }
+
+    override fun showContent() {
+        mobileDeviceDialogContent.visibility = VISIBLE
+    }
+
+    override fun closeDialog() {
+        dismiss()
+    }
+
+    override fun showError(text: String, error: Throwable) {
+        showMessage(text)
+    }
+
+    override fun showMessage(text: String) {
+        Toast.makeText(context, text, Toast.LENGTH_LONG).show()
+    }
+
+    override fun showExpiredDialog() {
+        (activity as? BaseActivity<*>)?.showExpiredDialog()
+    }
+
+    override fun openClearLoginView() {
+        (activity as? BaseActivity<*>)?.openClearLoginView()
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenPresenter.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenPresenter.kt
@ -0,0 +1,51 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class MobileDeviceTokenPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val mobileDeviceRepository: MobileDeviceRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<MobileDeviceTokenVIew>(errorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: MobileDeviceTokenVIew) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("Mobile device view was initialized")
+        loadData()
+    }
+
+    private fun loadData() {
+        Timber.i("Mobile device registration data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { mobileDeviceRepository.getToken(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally { view?.hideLoading() }
+            .subscribe({
+                Timber.i("Mobile device registration result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent()
+                }
+                analytics.logEvent("device_register", "symbol" to it.token.substring(0, 3))
+            }) {
+                Timber.i("Mobile device registration result: An exception occurred")
+                view?.closeDialog()
+                errorHandler.dispatch(it)
+            }
+        )
+    }
+}
--- a/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenVIew.kt
+++ b/app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenVIew.kt
@ -0,0 +1,17 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.ui.base.BaseView
+
+interface MobileDeviceTokenVIew : BaseView {
+
+    fun initView()
+
+    fun hideLoading()
+
+    fun showContent()
+
+    fun closeDialog()
+
+    fun updateData(token: MobileDeviceToken)
+}
--- a/Show More
+++ b/Show More