[4.10] Update build.gradle, signing and changelog.

* Show attendance in timetable view

* Optimize code and UX

* Update some code

* Update attendance layout

* Fix timetable view

* Bump iconics version

* Change umbrella icon

* Update app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/TimetableDayFragment.kt

* Update app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/TimetableDayFragment.kt

* Update app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/TimetableDayFragment.kt

* Update app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/TimetableDayFragment.kt

* Update lesson cell margins

* Add attendance info in lesson dialog

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>

.github/workflows/build-nightly-apk.yml

@@ -51,10 +51,12 @@ jobs:
       androidHome: ${{ env.ANDROID_HOME }}
       androidSdkRoot: ${{ env.ANDROID_SDK_ROOT }}
     steps:
-      - name: Setup JDK 1.8
+      - name: Setup JDK 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          distribution: 'zulu'
+          java-version: '11'
+          cache: 'gradle'
       - name: Setup Android SDK
         uses: android-actions/setup-android@v2
       - name: Clean build artifacts

.github/workflows/build-release-aab-play.yml

@@ -43,10 +43,12 @@ jobs:
       androidHome: ${{ env.ANDROID_HOME }}
       androidSdkRoot: ${{ env.ANDROID_SDK_ROOT }}
     steps:
-      - name: Setup JDK 1.8
+      - name: Setup JDK 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          distribution: 'zulu'
+          java-version: '11'
+          cache: 'gradle'
       - name: Setup Android SDK
         uses: android-actions/setup-android@v2
       - name: Clean build artifacts

.github/workflows/build-release-apk.yml

@@ -43,10 +43,12 @@ jobs:
       androidHome: ${{ env.ANDROID_HOME }}
       androidSdkRoot: ${{ env.ANDROID_SDK_ROOT }}
     steps:
-      - name: Setup JDK 1.8
+      - name: Setup JDK 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v2
         with:
-          java-version: 1.8
+          distribution: 'zulu'
+          java-version: '11'
+          cache: 'gradle'
       - name: Setup Android SDK
         uses: android-actions/setup-android@v2
       - name: Clean build artifacts

.gitignore

@@ -265,3 +265,4 @@ fabric.properties
 # End of https://www.toptal.com/developers/gitignore/api/android,androidstudio,gradle,java,kotlin
 
 signatures/
+.idea/*.xml

.idea/discord.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="DiscordProjectSettings">
-    <option name="show" value="PROJECT_FILES" />
-  </component>
-  <component name="ProjectNotificationSettings">
-    <option name="askShowProject" value="false" />
-  </component>
-</project>

.idea/kotlinc.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Kotlin2JvmCompilerArguments">
-    <option name="jvmTarget" value="1.8" />
-  </component>
-</project>

.idea/runConfigurations.xml

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
-        <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>

app/build.gradle

@@ -1,6 +1,7 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
+apply plugin: 'kotlin-parcelize'
 apply plugin: 'com.google.gms.google-services'
 apply plugin: 'com.google.firebase.crashlytics'
 
@@ -35,6 +36,9 @@ android {
     buildTypes {
         debug {
             minifyEnabled = false
+            manifestPlaceholders = [
+                    buildTimestamp: 0
+            ]
         }
         release {
             minifyEnabled = true
@@ -120,25 +124,25 @@ dependencies {
     coreLibraryDesugaring "com.android.tools:desugar_jdk_libs:1.1.5"
 
     // Android Jetpack
-    implementation "androidx.appcompat:appcompat:1.2.0"
+    implementation "androidx.appcompat:appcompat:1.3.1"
     implementation "androidx.cardview:cardview:1.0.0"
-    implementation "androidx.constraintlayout:constraintlayout:2.0.4"
+    implementation "androidx.constraintlayout:constraintlayout:2.1.0"
-    implementation "androidx.core:core-ktx:1.3.2"
+    implementation "androidx.core:core-ktx:1.6.0"
-    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.3.0"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.3.1"
-    implementation "androidx.navigation:navigation-fragment-ktx:2.3.4"
+    implementation "androidx.navigation:navigation-fragment-ktx:2.3.5"
-    implementation "androidx.recyclerview:recyclerview:1.1.0"
+    implementation "androidx.recyclerview:recyclerview:1.2.1"
-    implementation "androidx.room:room-runtime:2.2.6"
+    implementation "androidx.room:room-runtime:2.3.0"
-    implementation "androidx.work:work-runtime-ktx:2.5.0"
+    implementation "androidx.work:work-runtime-ktx:2.6.0"
-    kapt "androidx.room:room-compiler:2.2.6"
+    kapt "androidx.room:room-compiler:2.3.0"
 
     // Google design libs
-    implementation "com.google.android.material:material:1.3.0"
+    implementation "com.google.android.material:material:1.4.0"
     implementation "com.google.android:flexbox:2.0.1"
 
     // Play Services/Firebase
-    implementation "com.google.android.gms:play-services-wearable:17.0.0"
+    implementation "com.google.android.gms:play-services-wearable:17.1.0"
-    implementation "com.google.firebase:firebase-core:18.0.2"
+    implementation "com.google.firebase:firebase-core:19.0.1"
-    implementation "com.google.firebase:firebase-crashlytics:17.4.0"
+    implementation "com.google.firebase:firebase-crashlytics:18.2.1"
     implementation("com.google.firebase:firebase-messaging") { version { strictly "20.1.3" } }
 
     // OkHttp, Retrofit, Gson, Jsoup
@@ -153,7 +157,7 @@ dependencies {
 
     // Szkolny.eu libraries/forks
     implementation "eu.szkolny:android-snowfall:1ca9ea2da3"
-    implementation "eu.szkolny:agendacalendarview:5431f03098"
+    implementation "eu.szkolny:agendacalendarview:ac0f3dcf42"
     implementation "eu.szkolny:cafebar:5bf0c618de"
     implementation "eu.szkolny.fslogin:lib:2.0.0"
     implementation "eu.szkolny:material-about-library:1d5ebaf47c"
@@ -168,10 +172,10 @@ dependencies {
     kapt "eu.szkolny.selective-dao:codegen:27f8f3f194"
 
     // Iconics & related
-    implementation "com.mikepenz:iconics-core:5.3.0-b01"
+    implementation "com.mikepenz:iconics-core:5.3.1"
-    implementation "com.mikepenz:iconics-views:5.3.0-b01"
+    implementation "com.mikepenz:iconics-views:5.3.1"
     implementation "com.mikepenz:community-material-typeface:5.8.55.0-kotlin@aar"
-    implementation "eu.szkolny:szkolny-font:1.3"
+    implementation "eu.szkolny:szkolny-font:77e33acc2a"
 
     // Other dependencies
     implementation "cat.ereza:customactivityoncrash:2.3.0"

app/src/main/AndroidManifest.xml

@@ -146,6 +146,7 @@
             android:configChanges="orientation|keyboardHidden"
             android:theme="@style/Base.Theme.AppCompat" />
         <activity android:name=".ui.modules.base.BuildInvalidActivity" />
+        <activity android:name=".ui.modules.settings.contributors.ContributorsActivity" />
 
         <!--  _____               _
              |  __ \             (_)

app/src/main/assets/pl-changelog.html

@@ -1,7 +1,6 @@
-<h3>Wersja 4.8.1, 2021-06-06</h3>
+<h3>Wersja 4.10, 2021-09-22</h3>
 <ul>
-    <li>Poprawiono funkcje logowania. @BxOxSxS</li>
+    <li>Dodano wyświetlanie informacji o frekwencji w planie lekcji. @Antoni-Czaplicki</li>
-    <li>MobiDziennik: naprawiono wysyłanie wiadomości (błąd "nie znaleziono wiadomości").</li>
 </ul>
 <br>
 <br>

app/src/main/cpp/szkolny-signing.cpp

@@ -9,7 +9,7 @@
 
 /*secret password - removed for source code publication*/
 static toys AES_IV[16] = {
-	0x90, 0x44, 0x08, 0xb8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  };
+	0xda, 0x2a, 0x5f, 0xbe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  };
 
 unsigned char *agony(unsigned int laugh, unsigned char *box, unsigned char *heat);
 

app/src/main/java/pl/szczodrzynski/edziennik/App.kt

@@ -58,6 +58,7 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
         val profileId
             get() = profile.id
 
+        var enableChucker = false
         var debugMode = false
         var devMode = false
     }
@@ -70,6 +71,7 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
     val permissionManager by lazy { PermissionManager(this) }
     val attendanceManager by lazy { AttendanceManager(this) }
     val buildManager by lazy { BuildManager(this) }
+    val availabilityManager by lazy { AvailabilityManager(this) }
 
     val db
         get() = App.db
@@ -115,10 +117,12 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
             HyperLog.initialize(this)
             HyperLog.setLogLevel(Log.VERBOSE)
             HyperLog.setLogFormat(DebugLogFormat(this))
+            if (enableChucker) {
                 val chuckerCollector = ChuckerCollector(this, true, RetentionManager.Period.ONE_HOUR)
                 val chuckerInterceptor = ChuckerInterceptor(this, chuckerCollector)
                 builder.addInterceptor(chuckerInterceptor)
             }
+        }
 
         http = builder.build()
 
@@ -171,7 +175,8 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
         App.config = Config(App.db)
         App.profile = Profile(0, 0, 0, "")
         debugMode = BuildConfig.DEBUG
-        devMode = config.debugMode || debugMode
+        devMode = config.devMode ?: debugMode
+        enableChucker = config.enableChucker ?: devMode
 
         if (!profileLoadById(config.lastProfileId)) {
             db.profileDao().firstId?.let { profileLoadById(it) }

app/src/main/java/pl/szczodrzynski/edziennik/Extensions.kt

@@ -14,6 +14,7 @@ import android.graphics.Typeface
 import android.graphics.drawable.Drawable
 import android.os.Build
 import android.os.Bundle
+import android.os.Parcelable
 import android.text.*
 import android.text.style.CharacterStyle
 import android.text.style.ForegroundColorSpan
@@ -737,6 +738,7 @@ fun Bundle(vararg properties: Pair<String, Any?>): Bundle {
                 is Short -> putShort(property.first, property.second as Short)
                 is Double -> putDouble(property.first, property.second as Double)
                 is Boolean -> putBoolean(property.first, property.second as Boolean)
+                is Array<*> -> putParcelableArray(property.first, property.second as Array<out Parcelable>)
             }
         }
     }

app/src/main/java/pl/szczodrzynski/edziennik/MainActivity.kt

@@ -85,6 +85,8 @@ import pl.szczodrzynski.edziennik.ui.modules.webpush.WebPushFragment
 import pl.szczodrzynski.edziennik.utils.*
 import pl.szczodrzynski.edziennik.utils.Utils.d
 import pl.szczodrzynski.edziennik.utils.Utils.dpToPx
+import pl.szczodrzynski.edziennik.utils.managers.AvailabilityManager
+import pl.szczodrzynski.edziennik.utils.managers.AvailabilityManager.Error.Type
 import pl.szczodrzynski.edziennik.utils.models.Date
 import pl.szczodrzynski.edziennik.utils.models.NavTarget
 import pl.szczodrzynski.navlib.*
@@ -634,45 +636,23 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
             return
         }
 
-        app.profile.registerName?.let { registerName ->
+        val error = withContext(Dispatchers.IO) {
-            var status = app.config.sync.registerAvailability[registerName]
+            app.availabilityManager.check(app.profile)
-            if (status == null || status.nextCheckAt < currentTimeUnix()) {
-                val api = SzkolnyApi(app)
-                val result = withContext(Dispatchers.IO) {
-                    return@withContext api.runCatching({
-                        val availability = getRegisterAvailability()
-                        app.config.sync.registerAvailability = availability
-                        availability[registerName]
-                    }, onError = {
-                        if (it.toErrorCode() == ERROR_API_INVALID_SIGNATURE) {
-                            return@withContext false
         }
-                        return@withContext it
+        when (error?.type) {
-                    })
+            Type.NOT_AVAILABLE -> {
-                }
-
-                when (result) {
-                    false -> {
-                        Toast.makeText(this@MainActivity, R.string.error_no_api_access, Toast.LENGTH_SHORT).show()
-                        return@let
-                    }
-                    is Throwable -> {
-                        errorSnackbar.addError(result.toApiError(TAG)).show()
-                        return
-                    }
-                    is RegisterAvailabilityStatus -> {
-                        status = result
-                    }
-                }
-            }
-
-            if (status?.available != true || status.minVersionCode > BuildConfig.VERSION_CODE) {
                 swipeRefreshLayout.isRefreshing = false
                 loadTarget(DRAWER_ITEM_HOME)
-                if (status != null)
+                RegisterUnavailableDialog(this, error.status!!)
-                    RegisterUnavailableDialog(this, status)
                 return
             }
+            Type.API_ERROR -> {
+                errorSnackbar.addError(error.apiError!!).show()
+                return
+            }
+            Type.NO_API_ACCESS -> {
+                Toast.makeText(this, R.string.error_no_api_access, Toast.LENGTH_SHORT).show()
+            }
         }
 
         swipeRefreshLayout.isRefreshing = true
@@ -699,10 +679,9 @@ class MainActivity : AppCompatActivity(), CoroutineScope {
     @Subscribe(threadMode = ThreadMode.MAIN, sticky = true)
     fun onRegisterAvailabilityEvent(event: RegisterAvailabilityEvent) {
         EventBus.getDefault().removeStickyEvent(event)
-        app.profile.registerName?.let { registerName ->
+        val error = app.availabilityManager.check(app.profile, cacheOnly = true)
-            event.data[registerName]?.let {
+        if (error != null) {
-                RegisterUnavailableDialog(this, it)
+            RegisterUnavailableDialog(this, error.status!!)
-            }
         }
     }
     @Subscribe(threadMode = ThreadMode.MAIN)

app/src/main/java/pl/szczodrzynski/edziennik/config/Config.kt

@@ -12,10 +12,7 @@ import kotlinx.coroutines.launch
 import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.BuildConfig
 import pl.szczodrzynski.edziennik.config.db.ConfigEntry
-import pl.szczodrzynski.edziennik.config.utils.ConfigMigration
+import pl.szczodrzynski.edziennik.config.utils.*
-import pl.szczodrzynski.edziennik.config.utils.get
-import pl.szczodrzynski.edziennik.config.utils.set
-import pl.szczodrzynski.edziennik.config.utils.toHashMap
 import pl.szczodrzynski.edziennik.data.api.szkolny.response.Update
 import pl.szczodrzynski.edziennik.data.db.AppDb
 import kotlin.coroutines.CoroutineContext
@@ -75,10 +72,15 @@ class Config(val db: AppDb) : CoroutineScope, AbstractConfig {
         get() { mPrivacyPolicyAccepted = mPrivacyPolicyAccepted ?: values.get("privacyPolicyAccepted", false); return mPrivacyPolicyAccepted ?: false }
         set(value) { set("privacyPolicyAccepted", value); mPrivacyPolicyAccepted = value }
 
-    private var mDebugMode: Boolean? = null
+    private var mDevMode: Boolean? = null
-    var debugMode: Boolean
+    var devMode: Boolean?
-        get() { mDebugMode = mDebugMode ?: values.get("debugMode", false); return mDebugMode ?: false }
+        get() { mDevMode = mDevMode ?: values.getBooleanOrNull("debugMode"); return mDevMode }
-        set(value) { set("debugMode", value); mDebugMode = value }
+        set(value) { set("debugMode", value?.toString()); mDevMode = value }
+
+    private var mEnableChucker: Boolean? = null
+    var enableChucker: Boolean?
+        get() { mEnableChucker = mEnableChucker ?: values.getBooleanOrNull("enableChucker"); return mEnableChucker }
+        set(value) { set("enableChucker", value?.toString()); mEnableChucker = value }
 
     private var mDevModePassword: String? = null
     var devModePassword: String?
@@ -120,6 +122,11 @@ class Config(val db: AppDb) : CoroutineScope, AbstractConfig {
         get() { mApiInvalidCert = mApiInvalidCert ?: values["apiInvalidCert"]; return mApiInvalidCert }
         set(value) { set("apiInvalidCert", value); mApiInvalidCert = value }
 
+    private var mApiAvailabilityCheck: Boolean? = null
+    var apiAvailabilityCheck: Boolean
+        get() { mApiAvailabilityCheck = mApiAvailabilityCheck ?: values.get("apiAvailabilityCheck", true); return mApiAvailabilityCheck ?: true }
+        set(value) { set("apiAvailabilityCheck", value); mApiAvailabilityCheck = value }
+
     private var rawEntries: List<ConfigEntry> = db.configDao().getAllNow()
     private val profileConfigs: HashMap<Int, ProfileConfig> = hashMapOf()
     init {

app/src/main/java/pl/szczodrzynski/edziennik/config/utils/ConfigExtensions.kt

@@ -59,6 +59,9 @@ fun HashMap<String, String?>.get(key: String, default: String?): String? {
 fun HashMap<String, String?>.get(key: String, default: Boolean): Boolean {
     return this[key]?.toBoolean() ?: default
 }
+fun HashMap<String, String?>.getBooleanOrNull(key: String): Boolean? {
+    return this[key]?.toBooleanStrictOrNull()
+}
 fun HashMap<String, String?>.get(key: String, default: Int): Int {
     return this[key]?.toIntOrNull() ?: default
 }

app/src/main/java/pl/szczodrzynski/edziennik/config/utils/ConfigMigration.kt

@@ -67,7 +67,7 @@ class ConfigMigration(app: App, config: Config) {
         if (dataVersion < 3) {
             update = null
             privacyPolicyAccepted = false
-            debugMode = false
+            devMode = null
             devModePassword = null
             appInstalledTime = 0L
             appRateSnackbarTime = 0L

app/src/main/java/pl/szczodrzynski/edziennik/data/api/Constants.kt

@@ -43,7 +43,7 @@ const val LIBRUS_API_TOKEN_URL = "https://api.librus.pl/OAuth/Token"
 const val LIBRUS_API_TOKEN_JST_URL = "https://api.librus.pl/OAuth/TokenJST"
 const val LIBRUS_API_AUTHORIZATION = "Mjg6ODRmZGQzYTg3YjAzZDNlYTZmZmU3NzdiNThiMzMyYjE="
 const val LIBRUS_API_SECRET_JST = "18b7c1ee08216f636a1b1a2440e68398"
-const val LIBRUS_API_CLIENT_ID_JST = "49"
+const val LIBRUS_API_CLIENT_ID_JST = "59"
 //const val LIBRUS_API_CLIENT_ID_JST_REFRESH = "42"
 
 const val LIBRUS_JST_DEMO_CODE = "68656A21"

app/src/main/java/pl/szczodrzynski/edziennik/data/api/Errors.kt

@@ -195,6 +195,7 @@ const val ERROR_VULCAN_HEBE_FIREBASE_ERROR                  = 362
 const val ERROR_VULCAN_HEBE_CERTIFICATE_GONE                = 363
 const val ERROR_VULCAN_HEBE_SERVER_ERROR                    = 364
 const val ERROR_VULCAN_HEBE_ENTITY_NOT_FOUND                = 365
+const val ERROR_VULCAN_HEBE_MISSING_SENDER_ENTRY            = 366
 const val ERROR_VULCAN_API_DEPRECATED                       = 390
 
 const val ERROR_LOGIN_EDUDZIENNIK_WEB_INVALID_LOGIN         = 501

app/src/main/java/pl/szczodrzynski/edziennik/data/api/Regexes.kt

@@ -117,6 +117,17 @@ object Regexes {
     }
 
 
+    val MOBIDZIENNIK_TIMETABLE_TOP by lazy {
+        """<div class="plansc_top">.+?</div></div>""".toRegex(DOT_MATCHES_ALL)
+    }
+    val MOBIDZIENNIK_TIMETABLE_CELL by lazy {
+        """<div class="plansc_cnt_w" style="(.+?)">.+?style="(.+?)".+?title="(.+?)".+?>\s+(.+?)\s+</div>""".toRegex(DOT_MATCHES_ALL)
+    }
+    val MOBIDZIENNIK_TIMETABLE_LEFT by lazy {
+        """<div class="plansc_godz">.+?</div></div>""".toRegex(DOT_MATCHES_ALL)
+    }
+
+
 
     val IDZIENNIK_LOGIN_HIDDEN_FIELDS by lazy {
         """<input type="hidden".+?name="([A-z0-9_]+)?".+?value="([A-z0-9_+-/=]+)?".+?>""".toRegex(DOT_MATCHES_ALL)

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/EdziennikTask.kt

@@ -18,7 +18,6 @@ import pl.szczodrzynski.edziennik.data.api.events.RegisterAvailabilityEvent
 import pl.szczodrzynski.edziennik.data.api.interfaces.EdziennikCallback
 import pl.szczodrzynski.edziennik.data.api.interfaces.EdziennikInterface
 import pl.szczodrzynski.edziennik.data.api.models.ApiError
-import pl.szczodrzynski.edziennik.data.api.szkolny.SzkolnyApi
 import pl.szczodrzynski.edziennik.data.api.task.IApiTask
 import pl.szczodrzynski.edziennik.data.db.entity.LoginStore
 import pl.szczodrzynski.edziennik.data.db.entity.Profile
@@ -27,6 +26,7 @@ import pl.szczodrzynski.edziennik.data.db.full.AnnouncementFull
 import pl.szczodrzynski.edziennik.data.db.full.EventFull
 import pl.szczodrzynski.edziennik.data.db.full.MessageFull
 import pl.szczodrzynski.edziennik.utils.Utils.d
+import pl.szczodrzynski.edziennik.utils.managers.AvailabilityManager.Error.Type
 
 open class EdziennikTask(override val profileId: Int, val request: Any) : IApiTask(profileId) {
     companion object {
@@ -90,35 +90,21 @@ open class EdziennikTask(override val profileId: Int, val request: Any) : IApiTa
                 return
             }
 
-            profile.registerName?.also { registerName ->
+            val error = app.availabilityManager.check(profile)
-                var status = app.config.sync.registerAvailability[registerName]
+            when (error?.type) {
-                if (status == null || status.nextCheckAt < currentTimeUnix()) {
+                Type.NOT_AVAILABLE -> {
-                    val api = SzkolnyApi(app)
-                    api.runCatching({
-                        val availability = getRegisterAvailability()
-                        app.config.sync.registerAvailability = availability
-                        status = availability[registerName]
-                    }, onError = {
-                        val apiError = it.toApiError(TAG)
-                        if (apiError.errorCode == ERROR_API_INVALID_SIGNATURE) {
-                            return@also
-                        }
-                        taskCallback.onError(apiError)
-                        return
-                    })
-                }
-
-                if (status?.available != true
-                        || status?.minVersionCode ?: BuildConfig.VERSION_CODE > BuildConfig.VERSION_CODE) {
                     if (EventBus.getDefault().hasSubscriberForEvent(RegisterAvailabilityEvent::class.java)) {
-                        EventBus.getDefault().postSticky(
+                        EventBus.getDefault().postSticky(RegisterAvailabilityEvent())
-                                RegisterAvailabilityEvent(app.config.sync.registerAvailability)
-                        )
                     }
                     cancel()
                     taskCallback.onCompleted()
                     return
                 }
+                Type.API_ERROR -> {
+                    taskCallback.onError(error.apiError!!)
+                    return
+                }
+                else -> return@let
             }
         }
 

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/DataEdudziennik.kt

@@ -111,37 +111,6 @@ class DataEdudziennik(app: App, profile: Profile?, loginStore: LoginStore) : Dat
     val courseStudentEndpoint: String
         get() = "Course/$studentId/"
 
-    fun getSubject(longId: String, name: String): Subject {
-        val id = longId.crc32()
-        return subjectList.singleOrNull { it.id == id } ?: run {
-            val subject = Subject(profileId, id, name, name)
-            subjectList.put(id, subject)
-            subject
-        }
-    }
-
-    fun getTeacher(firstName: String, lastName: String, longId: String? = null): Teacher {
-        val name = "$firstName $lastName".fixName()
-        val id = name.crc32()
-        return teacherList.singleOrNull { it.id == id }?.also {
-            if (longId != null && it.loginId == null) it.loginId = longId
-        } ?: run {
-            val teacher = Teacher(profileId, id, firstName, lastName, longId)
-            teacherList.put(id, teacher)
-            teacher
-        }
-    }
-
-    fun getTeacherByFirstLast(nameFirstLast: String, longId: String? = null): Teacher {
-        val nameParts = nameFirstLast.split(" ")
-        return getTeacher(nameParts[0], nameParts[1], longId)
-    }
-
-    fun getTeacherByLastFirst(nameLastFirst: String, longId: String? = null): Teacher {
-        val nameParts = nameLastFirst.split(" ")
-        return getTeacher(nameParts[1], nameParts[0], longId)
-    }
-
     fun getEventType(longId: String, name: String): EventType {
         val id = longId.crc16().toLong()
         return eventTypes.singleOrNull { it.id == id } ?: run {

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebExams.kt

@@ -40,7 +40,7 @@ class EdudziennikWebExams(override val data: DataEdudziennik,
                 val subjectId = EDUDZIENNIK_SUBJECT_ID.find(subjectElement.attr("href"))?.get(1)
                         ?: return@forEach
                 val subjectName  = subjectElement.text().trim()
-                val subject = data.getSubject(subjectId, subjectName)
+                val subject = data.getSubject(subjectId.crc32(), subjectName)
 
                 val dateString = examElement.child(2).text().trim()
                 if (dateString.isBlank()) return@forEach

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebGrades.kt

@@ -53,7 +53,7 @@ class EdudziennikWebGrades(override val data: DataEdudziennik,
 
                 val subjectId = subjectElement.id().trim()
                 val subjectName = subjectElement.child(0).text().trim()
-                val subject = data.getSubject(subjectId, subjectName)
+                val subject = data.getSubject(subjectId.crc32(), subjectName)
 
                 val gradeType = when {
                     subjectElement.select("#sum").text().isNotBlank() -> TYPE_POINT_SUM

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebHomework.kt

@@ -41,7 +41,7 @@ class EdudziennikWebHomework(override val data: DataEdudziennik,
                     val subjectId = EDUDZIENNIK_SUBJECT_ID.find(subjectElement.attr("href"))?.get(1)
                             ?: return@forEach
                     val subjectName = subjectElement.text()
-                    val subject = data.getSubject(subjectId, subjectName)
+                    val subject = data.getSubject(subjectId.crc32(), subjectName)
 
                     val lessons = data.app.db.timetableDao().getAllForDateNow(profileId, date)
                     val startTime = lessons.firstOrNull { it.subjectId == subject.id }?.displayStartTime

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebStart.kt

@@ -73,7 +73,7 @@ class EdudziennikWebStart(override val data: DataEdudziennik,
         EDUDZIENNIK_SUBJECTS_START.findAll(text).forEach {
             val id = it[1].trim()
             val name = it[2].trim()
-            data.getSubject(id, name)
+            data.getSubject(id.crc32(), name)
         }
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/edudziennik/data/web/EdudziennikWebTimetable.kt

@@ -5,6 +5,7 @@
 package pl.szczodrzynski.edziennik.data.api.edziennik.edudziennik.data.web
 
 import org.jsoup.Jsoup
+import pl.szczodrzynski.edziennik.crc32
 import pl.szczodrzynski.edziennik.data.api.Regexes.EDUDZIENNIK_SUBJECT_ID
 import pl.szczodrzynski.edziennik.data.api.Regexes.EDUDZIENNIK_TEACHER_ID
 import pl.szczodrzynski.edziennik.data.api.edziennik.edudziennik.DataEdudziennik
@@ -89,7 +90,7 @@ class EdudziennikWebTimetable(override val data: DataEdudziennik,
                         val subjectId = EDUDZIENNIK_SUBJECT_ID.find(subjectElement.attr("href"))?.get(1)
                                 ?: return@forEachIndexed
                         val subjectName = subjectElement.text().trim()
-                        val subject = data.getSubject(subjectId, subjectName)
+                        val subject = data.getSubject(subjectId.crc32(), subjectName)
 
                         /* Getting teacher */
 

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/MobidziennikFeatures.kt

@@ -18,6 +18,7 @@ const val ENDPOINT_MOBIDZIENNIK_WEB_ATTENDANCE          = 2050
 const val ENDPOINT_MOBIDZIENNIK_WEB_MANUALS             = 2100
 const val ENDPOINT_MOBIDZIENNIK_WEB_ACCOUNT_EMAIL       = 2200
 const val ENDPOINT_MOBIDZIENNIK_WEB_HOMEWORK            = 2300 // not used as an endpoint
+const val ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE           = 2400
 const val ENDPOINT_MOBIDZIENNIK_API2_MAIN               = 3000
 
 val MobidziennikFeatures = listOf(
@@ -38,6 +39,12 @@ val MobidziennikFeatures = listOf(
 
 
 
+        /**
+         * Timetable - web scraping - does nothing if the API_MAIN timetable is enough.
+         */
+        Feature(LOGIN_TYPE_MOBIDZIENNIK, FEATURE_TIMETABLE, listOf(
+                ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE to LOGIN_METHOD_MOBIDZIENNIK_WEB
+        ), listOf(LOGIN_METHOD_MOBIDZIENNIK_WEB, LOGIN_METHOD_MOBIDZIENNIK_WEB)),
         /**
          * Agenda - "API" + web scraping.
          */

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/data/MobidziennikData.kt

@@ -84,6 +84,10 @@ class MobidziennikData(val data: DataMobidziennik, val onSuccess: () -> Unit) {
                 data.startProgress(R.string.edziennik_progress_endpoint_lucky_number)
                 MobidziennikWebManuals(data, lastSync, onSuccess)
             }*/
+            ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE-> {
+                data.startProgress(R.string.edziennik_progress_endpoint_timetable)
+                MobidziennikWebTimetable(data, lastSync, onSuccess)
+            }
             else -> onSuccess(endpointId)
         }
     }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/data/web/MobidziennikWebAttendance.kt

@@ -48,7 +48,7 @@ class MobidziennikWebAttendance(override val data: DataMobidziennik,
         //syncWeeks.clear()
         //syncWeeks += Date.fromY_m_d("2019-12-19")
 
-        syncWeeks.minBy { it.value }?.let {
+        syncWeeks.minByOrNull { it.value }?.let {
             data.toRemove.add(DataRemoveModel.Attendance.from(it))
         }
 

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/mobidziennik/data/web/MobidziennikWebTimetable.kt

@@ -0,0 +1,340 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-9-8.
+ */
+
+package pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.data.web
+
+import android.annotation.SuppressLint
+import org.jsoup.Jsoup
+import pl.szczodrzynski.edziennik.*
+import pl.szczodrzynski.edziennik.data.api.Regexes
+import pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.DataMobidziennik
+import pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE
+import pl.szczodrzynski.edziennik.data.api.edziennik.mobidziennik.data.MobidziennikWeb
+import pl.szczodrzynski.edziennik.data.db.entity.Lesson
+import pl.szczodrzynski.edziennik.data.db.entity.Metadata
+import pl.szczodrzynski.edziennik.data.db.entity.SYNC_ALWAYS
+import pl.szczodrzynski.edziennik.utils.models.Date
+import pl.szczodrzynski.edziennik.utils.models.Time
+import pl.szczodrzynski.edziennik.utils.models.Week
+import kotlin.collections.set
+import kotlin.text.replace
+
+class MobidziennikWebTimetable(
+    override val data: DataMobidziennik,
+    override val lastSync: Long?,
+    val onSuccess: (endpointId: Int) -> Unit
+) : MobidziennikWeb(data, lastSync) {
+    companion object {
+        private const val TAG = "MobidziennikWebTimetable"
+    }
+
+    private val rangesH = mutableMapOf<ClosedFloatingPointRange<Float>, Date>()
+    private val hoursV = mutableMapOf<Int, Pair<Time, Int?>>()
+    private var startDate: Date
+
+    private fun parseCss(css: String): Map<String, String> {
+        return css.split(";").mapNotNull {
+            val spl = it.split(":")
+            if (spl.size != 2)
+                return@mapNotNull null
+            return@mapNotNull spl[0].trim() to spl[1].trim()
+        }.toMap()
+    }
+
+    private fun getRangeH(h: Float): Date? {
+        return rangesH.entries.firstOrNull {
+            h in it.key
+        }?.value
+    }
+
+    private fun stringToDate(date: String): Date? {
+        val items = date.split(" ")
+        val day = items.getOrNull(0)?.toIntOrNull() ?: return null
+        val year = items.getOrNull(2)?.toIntOrNull() ?: return null
+        val month = when (items.getOrNull(1)) {
+            "stycznia" -> 1
+            "lutego" -> 2
+            "marca" -> 3
+            "kwietnia" -> 4
+            "maja" -> 5
+            "czerwca" -> 6
+            "lipca" -> 7
+            "sierpnia" -> 8
+            "września" -> 9
+            "października" -> 10
+            "listopada" -> 11
+            "grudnia" -> 12
+            else -> return null
+        }
+        return Date(year, month, day)
+    }
+
+    init {
+        val currentWeekStart = Week.getWeekStart()
+        val nextWeekEnd = Week.getWeekEnd().stepForward(0, 0, 7)
+        if (Date.getToday().weekDay > 4) {
+            currentWeekStart.stepForward(0, 0, 7)
+        }
+        startDate = data.arguments?.getString("weekStart")?.let {
+            Date.fromY_m_d(it)
+        } ?: currentWeekStart
+
+        val syncFutureDate = startDate > nextWeekEnd
+        // TODO: 2021-09-09 make DataRemoveModel keep extra lessons
+        val syncExtraLessons = false && System.currentTimeMillis() - (lastSync ?: 0) > 2 * DAY * MS
+        if (!syncFutureDate && !syncExtraLessons) {
+            onSuccess(ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE)
+        }
+        else {
+            val types = when {
+                syncFutureDate -> mutableListOf("podstawowy")//, "pozalekcyjny")
+                syncExtraLessons -> mutableListOf("pozalekcyjny")
+                else -> mutableListOf()
+            }
+
+            syncTypes(types, startDate) {
+                // set as synced now only when not syncing future date
+                // (to avoid waiting 2 days for normal sync after future sync)
+                if (syncExtraLessons)
+                    data.setSyncNext(ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE, SYNC_ALWAYS)
+                onSuccess(ENDPOINT_MOBIDZIENNIK_WEB_TIMETABLE)
+            }
+        }
+    }
+
+    private fun syncTypes(types: MutableList<String>, startDate: Date, onSuccess: () -> Unit) {
+        if (types.isEmpty()) {
+            onSuccess()
+            return
+        }
+        val type = types.removeAt(0)
+        webGet(TAG, "/dziennik/planlekcji?typ=$type&tydzien=${startDate.stringY_m_d}") { html ->
+            MobidziennikLuckyNumberExtractor(data, html)
+            readRangesH(html)
+            readRangesV(html)
+            readLessons(html)
+            syncTypes(types, startDate, onSuccess)
+        }
+    }
+
+    private fun readRangesH(html: String) {
+        val htmlH = Regexes.MOBIDZIENNIK_TIMETABLE_TOP.find(html) ?: return
+        val docH = Jsoup.parse(htmlH.value)
+
+        var posH = 0f
+        for (el in docH.select("div > div")) {
+            val css = parseCss(el.attr("style"))
+            val width = css["width"]
+                ?.trimEnd('%')
+                ?.toFloatOrNull()
+                ?: continue
+            val value = stringToDate(el.attr("title"))
+                ?: continue
+
+            val range = posH.rangeTo(posH + width)
+            posH += width
+
+            rangesH[range] = value
+        }
+    }
+
+    private fun readRangesV(html: String) {
+        val htmlV = Regexes.MOBIDZIENNIK_TIMETABLE_LEFT.find(html) ?: return
+        val docV = Jsoup.parse(htmlV.value)
+
+        for (el in docV.select("div > div")) {
+            val css = parseCss(el.attr("style"))
+            val top = css["top"]
+                ?.trimEnd('%')
+                ?.toFloatOrNull()
+                ?: continue
+            val values = el.text().split(" ")
+
+            val time = values.getOrNull(0)?.let {
+                Time.fromH_m(it)
+            } ?: continue
+            val num = values.getOrNull(1)?.toIntOrNull()
+
+            hoursV[(top * 100).toInt()] = time to num
+        }
+    }
+
+    private val whitespaceRegex = "\\s+".toRegex()
+    private val classroomRegex = "\\((.*)\\)".toRegex()
+    private fun cleanup(str: String): List<String> {
+        return str
+            .replace(whitespaceRegex, " ")
+            .replace("\n", "")
+            .replace("&lt;small&gt;", "$")
+            .replace("&lt;/small&gt;", "$")
+            .replace("&lt;br /&gt;", "\n")
+            .replace("&lt;br/&gt;", "\n")
+            .replace("&lt;br&gt;", "\n")
+            .replace("<br />", "\n")
+            .replace("<br/>", "\n")
+            .replace("<br>", "\n")
+            .replace("<b>", "%")
+            .replace("</b>", "%")
+            .replace("<span>", "")
+            .replace("</span>", "")
+            .split("\n")
+            .map { it.trim() }
+    }
+
+    @SuppressLint("LongLogTag", "LogNotTimber")
+    private fun readLessons(html: String) {
+        val matches = Regexes.MOBIDZIENNIK_TIMETABLE_CELL.findAll(html)
+
+        val noLessonDays = mutableListOf<Date>()
+        for (i in 0..6) {
+            noLessonDays.add(startDate.clone().stepForward(0, 0, i))
+        }
+
+        for (match in matches) {
+            val css = parseCss("${match[1]};${match[2]}")
+            val left = css["left"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+            val top = css["top"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+            val width = css["width"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+            val height = css["height"]?.trimEnd('%')?.toFloatOrNull() ?: continue
+
+            val posH = left + width / 2f
+            val topInt = (top * 100).toInt()
+            val bottomInt = ((top + height) * 100).toInt()
+
+            val lessonDate = getRangeH(posH) ?: continue
+            val (startTime, lessonNumber) = hoursV[topInt] ?: continue
+            val endTime = hoursV[bottomInt]?.first ?: continue
+
+            noLessonDays.remove(lessonDate)
+
+            var typeName: String? = null
+            var subjectName: String? = null
+            var teacherName: String? = null
+            var classroomName: String? = null
+            var teamName: String? = null
+            val items = (cleanup(match[3]) + cleanup(match[4])).toMutableList()
+
+            var length = 0
+            while (items.isNotEmpty() && length != items.size) {
+                length = items.size
+                val toRemove = mutableListOf<String?>()
+                items.forEachIndexed { i, item ->
+                    when {
+                        item.isEmpty() ->
+                            toRemove.add(item)
+                        item.contains(":") && item.contains(" - ") ->
+                            toRemove.add(item)
+
+                        item.startsWith("%") -> {
+                            subjectName = item.trim('%')
+                            // I have no idea what's going on here
+                            // ok now seriously.. the subject (long or short) item
+                            // may NOT be 0th, as the HH:MM - HH:MM item may be before
+                            // or even the typeName item. As these are always **before**,
+                            // they are removed in previous iterations, so the first not removed
+                            // item should be the long/short subjectName needing to be removed now.
+                            toRemove.add(items[toRemove.size])
+                            // ...and this has to be added later
+                            toRemove.add(item)
+                        }
+
+                        item.startsWith("&") -> {
+                            typeName = item.trim('&')
+                            toRemove.add(item)
+                        }
+                        typeName != null && (item.contains(typeName!!) || item.contains("</small>")) -> {
+                            toRemove.add(item)
+                        }
+
+                        item.contains("(") && item.contains(")") -> {
+                            classroomName = classroomRegex.find(item)?.get(1)
+                            items[i] = item.replace("($classroomName)", "").trim()
+                        }
+                        classroomName != null && item.contains(classroomName!!) -> {
+                            items[i] = item.replace("($classroomName)", "").trim()
+                        }
+
+                        item.contains("class=\"wyjatek tooltip\"") ->
+                            toRemove.add(item)
+                    }
+                }
+                items.removeAll(toRemove)
+            }
+
+            if (items.size == 2 && items[0].contains(" - ")) {
+                val parts = items[0].split(" - ")
+                teamName = parts[0]
+                teacherName = parts[1]
+            }
+            else if (items.size == 2 && typeName?.contains("odwołana") == true) {
+                teamName = items[0]
+            }
+            else if (items.size == 4) {
+                teamName = items[0]
+                teacherName = items[1]
+            }
+
+            val type = when (typeName) {
+                "zastępstwo" -> Lesson.TYPE_CHANGE
+                "lekcja odwołana", "odwołana" -> Lesson.TYPE_CANCELLED
+                else -> Lesson.TYPE_NORMAL
+            }
+            val subject = subjectName?.let { data.getSubject(null, it) }
+            val teacher = teacherName?.let { data.getTeacherByLastFirst(it) }
+            val team = teamName?.let { data.getTeam(
+                id = null,
+                name = it,
+                schoolCode = data.loginServerName ?: return@let null,
+                isTeamClass = false
+            ) }
+
+            Lesson(data.profileId, -1).also {
+                it.type = type
+                if (type == Lesson.TYPE_CANCELLED) {
+                    it.oldDate = lessonDate
+                    it.oldLessonNumber = lessonNumber
+                    it.oldStartTime = startTime
+                    it.oldEndTime = endTime
+                    it.oldSubjectId = subject?.id ?: -1
+                    it.oldTeamId = team?.id ?: -1
+                }
+                else {
+                    it.date = lessonDate
+                    it.lessonNumber = lessonNumber
+                    it.startTime = startTime
+                    it.endTime = endTime
+                    it.subjectId = subject?.id ?: -1
+                    it.teacherId = teacher?.id ?: -1
+                    it.teamId = team?.id ?: -1
+                    it.classroom = classroomName
+                }
+
+                it.id = it.buildId()
+
+                val seen = profile?.empty == false || lessonDate < Date.getToday()
+
+                if (it.type != Lesson.TYPE_NORMAL) {
+                    data.metadataList.add(
+                        Metadata(
+                            data.profileId,
+                            Metadata.TYPE_LESSON_CHANGE,
+                            it.id,
+                            seen,
+                            seen
+                        )
+                    )
+                }
+                data.lessonList += it
+            }
+        }
+
+        for (date in noLessonDays) {
+            data.lessonList += Lesson(data.profileId, date.value.toLong()).also {
+                it.type = Lesson.TYPE_NO_LESSONS
+                it.date = date
+            }
+        }
+    }
+}
+

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/DataPodlasie.kt

@@ -81,39 +81,4 @@ class DataPodlasie(app: App, profile: Profile?, loginStore: LoginStore) : Data(a
 
     val loginShort: String?
         get() = studentLogin?.split('@')?.get(0)
-
-    fun getSubject(name: String): Subject {
-        val id = name.crc32()
-        return subjectList.singleOrNull { it.id == id } ?: run {
-            val subject = Subject(profileId, id, name, name)
-            subjectList.put(id, subject)
-            subject
-        }
-    }
-
-    fun getTeacher(firstName: String, lastName: String): Teacher {
-        val name = "$firstName $lastName".fixName()
-        return teacherList.singleOrNull { it.fullName == name } ?: run {
-            val id = name.crc32()
-            val teacher = Teacher(profileId, id, firstName, lastName)
-            teacherList.put(id, teacher)
-            teacher
-        }
-    }
-
-    fun getTeam(name: String? = null): Team {
-        if (name == "cała klasa" || name == null) return teamClass ?: run {
-            val id = className!!.crc32()
-            val teamCode = "$schoolShortName:$className"
-            val team = Team(profileId, id, className, Team.TYPE_CLASS, teamCode, -1)
-            teamList.put(id, team)
-            return team
-        } else {
-            val id = name.crc32()
-            val teamCode = "$schoolShortName:$name"
-            val team = Team(profileId, id, name, Team.TYPE_VIRTUAL, teamCode, -1)
-            teamList.put(id, team)
-            return team
-        }
-    }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiFinalGrades.kt

@@ -36,7 +36,7 @@ class PodlasieApiFinalGrades(val data: DataPodlasie, val rows: List<JsonObject>)
             }
 
             val subjectName = grade.getString("SchoolSubject") ?: return@forEach
-            val subject = data.getSubject(subjectName)
+            val subject = data.getSubject(null, subjectName)
 
             val addedDate = if (profile.empty) profile.getSemesterStart(semester).inMillis
             else System.currentTimeMillis()

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiGrades.kt

@@ -34,7 +34,7 @@ class PodlasieApiGrades(val data: DataPodlasie, val rows: List<JsonObject>) {
             val teacher = data.getTeacher(teacherFirstName, teacherLastName)
 
             val subjectName = grade.getString("SchoolSubject") ?: return@forEach
-            val subject = data.getSubject(subjectName)
+            val subject = data.getSubject(null, subjectName)
 
             val addedDate = grade.getString("ReceivedDate")?.let { Date.fromY_m_d(it).inMillis }
                     ?: System.currentTimeMillis()

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiMain.kt

@@ -22,7 +22,13 @@ class PodlasieApiMain(override val data: DataPodlasie,
 
     init {
         apiGet(TAG, PODLASIE_API_USER_ENDPOINT) { json ->
-            data.getTeam() // Save the class team when it doesn't exist.
+            // Save the class team when it doesn't exist.
+            data.getTeam(
+                id = null,
+                name = data.className ?: "",
+                schoolCode = data.schoolShortName ?: "",
+                isTeamClass = true
+            )
 
             json.getInt("LuckyNumber")?.let { PodlasieApiLuckyNumber(data, it) }
             json.getJsonArray("Teacher")?.asJsonObjectList()?.let { PodlasieApiTeachers(data, it) }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiTimetable.kt

@@ -43,14 +43,21 @@ class PodlasieApiTimetable(val data: DataPodlasie, rows: List<JsonObject>) {
             val startTime = lesson.getString("TimeFrom")?.let { Time.fromH_m_s(it) }
                     ?: return@forEach
             val endTime = lesson.getString("TimeTo")?.let { Time.fromH_m_s(it) } ?: return@forEach
-            val subject = lesson.getString("SchoolSubject")?.let { data.getSubject(it) }
+            val subject = lesson.getString("SchoolSubject")?.let { data.getSubject(null, it) }
                     ?: return@forEach
 
             val teacherFirstName = lesson.getString("TeacherFirstName") ?: return@forEach
             val teacherLastName = lesson.getString("TeacherLastName") ?: return@forEach
             val teacher = data.getTeacher(teacherFirstName, teacherLastName)
 
-            val team = lesson.getString("Group")?.let { data.getTeam(it) } ?: return@forEach
+            val team = lesson.getString("Group")?.let {
+                data.getTeam(
+                    id = null,
+                    name = it,
+                    schoolCode = data.schoolShortName ?: "",
+                    isTeamClass = it == "cała klasa"
+                )
+            } ?: return@forEach
             val classroom = lesson.getString("Room")
 
             Lesson(data.profileId, -1).also {

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/DataVulcan.kt

@@ -222,6 +222,16 @@ class DataVulcan(app: App, profile: Profile?, loginStore: LoginStore) : Data(app
         get() { mHebeContext = mHebeContext ?: profile?.getStudentData("hebeContext", null); return mHebeContext }
         set(value) { profile?.putStudentData("hebeContext", value) ?: return; mHebeContext = value }
 
+    private var mSenderAddressHash: String? = null
+    var senderAddressHash: String?
+        get() { mSenderAddressHash = mSenderAddressHash ?: profile?.getStudentData("senderAddressHash", null); return mSenderAddressHash }
+        set(value) { profile?.putStudentData("senderAddressHash", value) ?: return; mSenderAddressHash = value }
+
+    private var mSenderAddressName: String? = null
+    var senderAddressName: String?
+        get() { mSenderAddressName = mSenderAddressName ?: profile?.getStudentData("senderAddressName", null); return mSenderAddressName }
+        set(value) { profile?.putStudentData("senderAddressName", value) ?: return; mSenderAddressName = value }
+
     val apiUrl: String?
         get() {
             val url = when (apiToken[symbol]?.substring(0, 3)) {

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/hebe/VulcanHebeAttendance.kt

@@ -38,7 +38,7 @@ class VulcanHebeAttendance(
             lastSync = lastSync
         ) { list, _ ->
             list.forEach { attendance ->
-                val id = attendance.getLong("AuxPresenceId") ?: return@forEach
+                val id = attendance.getLong("Id") ?: return@forEach
                 val type = attendance.getJsonObject("PresenceType") ?: return@forEach
                 val baseType = getBaseType(type)
                 val typeName = type.getString("Name") ?: return@forEach

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/hebe/VulcanHebeMain.kt

@@ -97,6 +97,10 @@ class VulcanHebeMain(
                 val studentSemesterId = period.getInt("Id") ?: return@forEach
                 val studentSemesterNumber = period.getInt("Number") ?: return@forEach
 
+                val senderEntry = student.getJsonObject("SenderEntry")
+                val senderAddressName = senderEntry.getString("Address")
+                val senderAddressHash = senderEntry.getString("AddressHash")
+
                 val hebeContext = student.getString("Context")
 
                 val isParent = login.getString("LoginRole").equals("opiekun", ignoreCase = true)
@@ -143,6 +147,8 @@ class VulcanHebeMain(
                     studentData["schoolSymbol"] = schoolSymbol
                     studentData["schoolShort"] = schoolShort
                     studentData["schoolName"] = schoolCode
+                    studentData["senderAddressName"] = senderAddressName
+                    studentData["senderAddressHash"] = senderAddressHash
                     studentData["hebeContext"] = hebeContext
                 }
                 dateSemester1Start?.let {

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/hebe/VulcanHebeSendMessage.kt

@@ -7,6 +7,7 @@ package pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.data.hebe
 import com.google.gson.JsonObject
 import org.greenrobot.eventbus.EventBus
 import pl.szczodrzynski.edziennik.*
+import pl.szczodrzynski.edziennik.data.api.ERROR_VULCAN_HEBE_MISSING_SENDER_ENTRY
 import pl.szczodrzynski.edziennik.data.api.VULCAN_HEBE_ENDPOINT_MESSAGES_SEND
 import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.DataVulcan
 import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.data.VulcanHebe
@@ -27,6 +28,22 @@ class VulcanHebeSendMessage(
     }
 
     init {
+        if (data.senderAddressName == null || data.senderAddressHash == null) {
+            VulcanHebeMain(data).getStudents(data.profile, null) {
+                if (data.senderAddressName == null || data.senderAddressHash == null) {
+                    data.error(TAG, ERROR_VULCAN_HEBE_MISSING_SENDER_ENTRY)
+                }
+                else {
+                    sendMessage()
+                }
+            }
+        }
+        else {
+            sendMessage()
+        }
+    }
+
+    private fun sendMessage() {
         val recipientsArray = JsonArray()
         recipients.forEach { teacher ->
             recipientsArray += JsonObject(
@@ -40,10 +57,10 @@ class VulcanHebeSendMessage(
         val senderName = (profile?.accountName ?: profile?.studentNameLong)
             ?.swapFirstLastName() ?: ""
         val sender = JsonObject(
-            "Address" to senderName,
+            "Address" to data.senderAddressName,
             "LoginId" to data.studentLoginId.toString(),
             "Initials" to senderName.getNameInitials(),
-            "AddressHash" to senderName.sha1Hex()
+            "AddressHash" to data.senderAddressHash
         )
 
         apiPost(

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/data/hebe/VulcanHebeTimetable.kt

@@ -11,6 +11,7 @@ import pl.szczodrzynski.edziennik.data.api.VULCAN_HEBE_ENDPOINT_TIMETABLE_CHANGE
 import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.DataVulcan
 import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.ENDPOINT_VULCAN_HEBE_TIMETABLE
 import pl.szczodrzynski.edziennik.data.api.edziennik.vulcan.data.VulcanHebe
+import pl.szczodrzynski.edziennik.data.api.models.DataRemoveModel
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson.Companion.TYPE_CANCELLED
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson.Companion.TYPE_CHANGE
@@ -47,7 +48,7 @@ class VulcanHebeTimetable(
             ?: previousWeekStart
         val dateTo = dateFrom.clone().stepForward(0, 0, 13)
 
-        val lastSync = null
+        val lastSync = 0L
 
         apiGetList(
             TAG,
@@ -106,6 +107,8 @@ class VulcanHebeTimetable(
                     "Clearing lessons between ${dateFrom.stringY_m_d} and ${dateTo.stringY_m_d}"
                 )
 
+                data.toRemove.add(DataRemoveModel.Timetable.between(dateFrom, dateTo))
+
                 data.lessonList.addAll(lessonList)
 
                 data.setSyncNext(ENDPOINT_VULCAN_HEBE_TIMETABLE, SYNC_ALWAYS)

app/src/main/java/pl/szczodrzynski/edziennik/data/api/events/RegisterAvailabilityEvent.kt

@@ -4,8 +4,4 @@
 
 package pl.szczodrzynski.edziennik.data.api.events
 
-import pl.szczodrzynski.edziennik.data.api.szkolny.response.RegisterAvailabilityStatus
+class RegisterAvailabilityEvent()
-
-data class RegisterAvailabilityEvent(
-        val data: Map< String, RegisterAvailabilityStatus>
-)

app/src/main/java/pl/szczodrzynski/edziennik/data/api/models/Data.kt

@@ -2,6 +2,7 @@ package pl.szczodrzynski.edziennik.data.api.models
 
 import android.util.LongSparseArray
 import android.util.SparseArray
+import androidx.core.util.set
 import androidx.core.util.size
 import androidx.room.OnConflictStrategy
 import com.google.gson.JsonObject
@@ -376,4 +377,108 @@ abstract class Data(val app: App, val profile: Profile?, val loginStore: LoginSt
     fun startProgress(stringRes: Int) {
         callback.onStartProgress(stringRes)
     }
+
+    /*    _    _ _   _ _
+         | |  | | | (_) |
+         | |  | | |_ _| |___
+         | |  | | __| | / __|
+         | |__| | |_| | \__ \
+          \____/ \__|_|_|__*/
+    fun getSubject(id: Long?, name: String, shortName: String = name): Subject {
+        var subject = subjectList.singleOrNull { it.id == id }
+        if (subject == null)
+            subject = subjectList.singleOrNull { it.longName == name }
+        if (subject == null)
+            subject = subjectList.singleOrNull { it.shortName == name }
+
+        if (subject == null) {
+            subject = Subject(
+                profileId,
+                id ?: name.crc32(),
+                name,
+                shortName
+            )
+            subjectList[subject.id] = subject
+        }
+        return subject
+    }
+
+    fun getTeam(id: Long?, name: String, schoolCode: String, isTeamClass: Boolean = false): Team {
+        if (isTeamClass && teamClass != null)
+            return teamClass as Team
+        var team = teamList.singleOrNull { it.id == id }
+
+        val namePlain = name.replace(" ", "")
+        if (team == null)
+            team = teamList.singleOrNull { it.name.replace(" ", "") == namePlain }
+
+        if (team == null) {
+            team = Team(
+                profileId,
+                id ?: name.crc32(),
+                name,
+                if (isTeamClass) Team.TYPE_CLASS else Team.TYPE_VIRTUAL,
+                "$schoolCode:$name",
+                -1
+            )
+            teamList[team.id] = team
+        }
+        return team
+    }
+
+    fun getTeacher(firstName: String, lastName: String, loginId: String? = null): Teacher {
+        val teacher = teacherList.singleOrNull { it.fullName == "$firstName $lastName" }
+        return validateTeacher(teacher, firstName, lastName, loginId)
+    }
+
+    fun getTeacher(firstNameChar: Char, lastName: String, loginId: String? = null): Teacher {
+        val teacher = teacherList.singleOrNull { it.shortName == "$firstNameChar.$lastName" }
+        return validateTeacher(teacher, firstNameChar.toString(), lastName, loginId)
+    }
+
+    fun getTeacherByLastFirst(nameLastFirst: String, loginId: String? = null): Teacher {
+        val nameParts = nameLastFirst.split(" ")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[1], nameParts[0], loginId)
+    }
+
+    fun getTeacherByFirstLast(nameFirstLast: String, loginId: String? = null): Teacher {
+        val nameParts = nameFirstLast.split(" ")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[0], nameParts[1], loginId)
+    }
+
+    fun getTeacherByFDotLast(nameFDotLast: String, loginId: String? = null): Teacher {
+        val nameParts = nameFDotLast.split(".")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[0][0], nameParts[1], loginId)
+    }
+
+    fun getTeacherByFDotSpaceLast(nameFDotSpaceLast: String, loginId: String? = null): Teacher {
+        val nameParts = nameFDotSpaceLast.split(".")
+        return if (nameParts.size == 1)
+            getTeacher(nameParts[0], "", loginId)
+        else
+            getTeacher(nameParts[0][0], nameParts[1], loginId)
+    }
+
+    private fun validateTeacher(teacher: Teacher?, firstName: String, lastName: String, loginId: String?): Teacher {
+        val obj = teacher ?: Teacher(profileId, -1, firstName, lastName, loginId).apply {
+            id = fullName.crc32()
+            teacherList[id] = this
+        }
+        return obj.also {
+            if (loginId != null && it.loginId != null)
+                it.loginId = loginId
+            if (firstName.length > 1)
+                it.name = firstName
+            it.surname = lastName
+        }
+    }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/SzkolnyApi.kt

@@ -22,10 +22,7 @@ import pl.szczodrzynski.edziennik.data.api.szkolny.interceptor.ApiCacheIntercept
 import pl.szczodrzynski.edziennik.data.api.szkolny.interceptor.SignatureInterceptor
 import pl.szczodrzynski.edziennik.data.api.szkolny.interceptor.Signing
 import pl.szczodrzynski.edziennik.data.api.szkolny.request.*
-import pl.szczodrzynski.edziennik.data.api.szkolny.response.ApiResponse
+import pl.szczodrzynski.edziennik.data.api.szkolny.response.*
-import pl.szczodrzynski.edziennik.data.api.szkolny.response.RegisterAvailabilityStatus
-import pl.szczodrzynski.edziennik.data.api.szkolny.response.Update
-import pl.szczodrzynski.edziennik.data.api.szkolny.response.WebPushResponse
 import pl.szczodrzynski.edziennik.data.db.entity.Event
 import pl.szczodrzynski.edziennik.data.db.entity.FeedbackMessage
 import pl.szczodrzynski.edziennik.data.db.entity.Notification
@@ -373,6 +370,15 @@ class SzkolnyApi(val app: App) : CoroutineScope {
         throw SzkolnyApiException(null)
     }
 
+    @Throws(Exception::class)
+    fun getContributors(): ContributorsResponse {
+        val response = api.contributors().execute()
+        if (response.isSuccessful && response.body() != null) {
+            return parseResponse(response)
+        }
+        throw SzkolnyApiException(null)
+    }
+
     @Throws(Exception::class)
     fun getFirebaseToken(registerName: String): String {
         val response = api.firebaseToken(registerName).execute()

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/SzkolnyService.kt

@@ -27,6 +27,9 @@ interface SzkolnyService {
     @POST("appUser")
     fun appUser(@Body request: AppUserRequest): Call<ApiResponse<Unit>>
 
+    @GET("contributors/android")
+    fun contributors(): Call<ApiResponse<ContributorsResponse>>
+
     @GET("updates/app")
     fun updates(@Query("channel") channel: String = "release"): Call<ApiResponse<List<Update>>>
 

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/interceptor/Signing.kt

@@ -46,6 +46,6 @@ object Signing {
 
     /*fun provideKey(param1: String, param2: Long): ByteArray {*/
     fun pleaseStopRightNow(param1: String, param2: Long): ByteArray {
-        return "$param1.MTIzNDU2Nzg5MDOlSskDmW===.$param2".sha256()
+        return "$param1.MTIzNDU2Nzg5MDY8+Uq3So===.$param2".sha256()
     }
 }

app/src/main/java/pl/szczodrzynski/edziennik/data/api/szkolny/response/ContributorsResponse.kt

@@ -0,0 +1,20 @@
+package pl.szczodrzynski.edziennik.data.api.szkolny.response
+
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
+
+data class ContributorsResponse(
+    val contributors: List<Item>,
+    val translators: List<Item>
+) {
+
+    @Parcelize
+    data class Item(
+        val login: String,
+        val name: String?,
+        val avatarUrl: String,
+        val profileUrl: String,
+        val itemUrl: String,
+        val contributions: Int?
+    ) : Parcelable
+}

app/src/main/java/pl/szczodrzynski/edziennik/data/db/dao/AttendanceDao.kt

@@ -64,6 +64,8 @@ abstract class AttendanceDao : BaseDao<Attendance, AttendanceFull> {
             getRawNow("$QUERY WHERE notified = 0 $ORDER_BY")
     fun getNotNotifiedNow(profileId: Int) =
             getRawNow("$QUERY WHERE attendances.profileId = $profileId AND notified = 0 $ORDER_BY")
+    fun getAllByDateNow(profileId: Int, date: Date) =
+            getRawNow("$QUERY WHERE attendances.profileId = $profileId AND attendanceDate = '${date.stringY_m_d}' $ORDER_BY")
 
     // GET ONE - NOW
     fun getByIdNow(profileId: Int, id: Long) =

app/src/main/java/pl/szczodrzynski/edziennik/data/db/entity/Profile.kt

@@ -140,7 +140,7 @@ open class Profile(
             LOGIN_TYPE_MOBIDZIENNIK -> "mobidziennik"
             LOGIN_TYPE_PODLASIE -> "podlasie"
             LOGIN_TYPE_EDUDZIENNIK -> "edudziennik"
-            else -> null
+            else -> "unknown"
         }
 
     override fun getImageDrawable(context: Context): Drawable {

app/src/main/java/pl/szczodrzynski/edziennik/data/firebase/SzkolnyAppFirebase.kt

@@ -60,7 +60,7 @@ class SzkolnyAppFirebase(val app: App, val profiles: List<Profile>, val message:
                     ) ?: return@launch
                     app.config.sync.registerAvailability = data
                     if (EventBus.getDefault().hasSubscriberForEvent(RegisterAvailabilityEvent::class.java)) {
-                        EventBus.getDefault().postSticky(RegisterAvailabilityEvent(data))
+                        EventBus.getDefault().postSticky(RegisterAvailabilityEvent())
                     }
                 }
             }

app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/RegisterUnavailableDialog.kt

@@ -42,8 +42,6 @@ class RegisterUnavailableDialog(
     init { run {
         if (activity.isFinishing)
             return@run
-        if (status.available && status.minVersionCode <= BuildConfig.VERSION_CODE)
-            return@run
         onShowListener?.invoke(TAG)
         app = activity.applicationContext as App
 

app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/timetable/GenerateBlockTimetableDialog.kt

@@ -4,11 +4,14 @@
 
 package pl.szczodrzynski.edziennik.ui.dialogs.timetable
 
+import android.content.ContentResolver
+import android.content.ContentValues
 import android.content.Intent
 import android.graphics.*
 import android.net.Uri
 import android.os.Build
 import android.os.Environment
+import android.provider.MediaStore
 import android.util.Log
 import android.view.View
 import android.view.View.MeasureSpec
@@ -373,25 +376,31 @@ class GenerateBlockTimetableDialog(
 
             val today = Date.getToday().stringY_m_d
             val now = Time.getNow().stringH_M_S
+            val filename = "plan_lekcji_${app.profile.name}_${today}_${now}.png"
+            val resolver: ContentResolver = activity.applicationContext.contentResolver
+            val values = ContentValues()
+            values.put(MediaStore.MediaColumns.MIME_TYPE, "image/png")
 
-            val outputDir = Environment.getExternalStoragePublicDirectory("Szkolny.eu").apply { mkdirs() }
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-            val outputFile = File(outputDir, "plan_lekcji_${app.profile.name}_${today}_${now}.png")
+                values.put(MediaStore.MediaColumns.DISPLAY_NAME, filename)
+                values.put(MediaStore.MediaColumns.RELATIVE_PATH, File(Environment.DIRECTORY_PICTURES, "Szkolny.eu").path)
+            } else {
+                val picturesDirectory = File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "Szkolny.eu")
+                picturesDirectory.mkdirs()
+                values.put(MediaStore.MediaColumns.DATA, File(picturesDirectory, filename).path)
+            }
 
             try {
-                val fos = FileOutputStream(outputFile)
+                val uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values) ?: return@withContext null
-                bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos)
+                resolver.openOutputStream(uri).use {
-                fos.close()
+                    bitmap.compress(Bitmap.CompressFormat.PNG, 100, it)
+                }
+                uri
             } catch (e: Exception) {
                 Log.e("SAVE_IMAGE", e.message, e)
                 return@withContext null
             }
 
-            val uri = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-                FileProvider.getUriForFile(activity, app.packageName + ".provider", outputFile)
-            } else {
-                Uri.parse("file://" + outputFile.absolutePath)
-            }
-            uri
         }
 
         progressDialog.dismiss()

app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/timetable/LessonDetailsDialog.kt

@@ -8,15 +8,20 @@ import android.content.Intent
 import android.view.View
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
 import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.mikepenz.iconics.IconicsDrawable
+import com.mikepenz.iconics.utils.colorInt
+import com.mikepenz.iconics.utils.sizeDp
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
 import pl.szczodrzynski.edziennik.data.db.full.LessonFull
 import pl.szczodrzynski.edziennik.databinding.DialogLessonDetailsBinding
 import pl.szczodrzynski.edziennik.onClick
@@ -24,6 +29,7 @@ import pl.szczodrzynski.edziennik.setText
 import pl.szczodrzynski.edziennik.ui.dialogs.event.EventDetailsDialog
 import pl.szczodrzynski.edziennik.ui.dialogs.event.EventListAdapter
 import pl.szczodrzynski.edziennik.ui.dialogs.event.EventManualDialog
+import pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceDetailsDialog
 import pl.szczodrzynski.edziennik.ui.modules.timetable.TimetableFragment
 import pl.szczodrzynski.edziennik.utils.BetterLink
 import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
@@ -34,6 +40,7 @@ import kotlin.coroutines.CoroutineContext
 class LessonDetailsDialog(
         val activity: AppCompatActivity,
         val lesson: LessonFull,
+        val attendance: AttendanceFull? = null,
         val onShowListener: ((tag: String) -> Unit)? = null,
         val onDismissListener: ((tag: String) -> Unit)? = null
 ) : CoroutineScope {
@@ -52,6 +59,8 @@ class LessonDetailsDialog(
     private lateinit var adapter: EventListAdapter
     private val manager
         get() = app.timetableManager
+    private val attendanceManager
+        get() = app.attendanceManager
 
     init { run {
         if (activity.isFinishing)
@@ -170,6 +179,27 @@ class LessonDetailsDialog(
             b.teamName = lesson.teamName
         }
 
+        b.attendanceDivider.isVisible = attendance != null
+        b.attendanceLayout.isVisible = attendance != null
+        if (attendance != null) {
+            b.attendanceView.setAttendance(attendance, app.attendanceManager, bigView = true)
+            b.attendanceType.text = attendance.typeName
+            b.attendanceIcon.isVisible = attendance.let {
+                val icon = attendanceManager.getAttendanceIcon(it) ?: return@let false
+                val color = attendanceManager.getAttendanceColor(it)
+                b.attendanceIcon.setImageDrawable(
+                    IconicsDrawable(activity, icon).apply {
+                        colorInt = color
+                        sizeDp = 24
+                    }
+                )
+                true
+            }
+            b.attendanceDetails.onClick {
+                AttendanceDetailsDialog(activity, attendance, onShowListener, onDismissListener)
+            }
+        }
+
         adapter = EventListAdapter(
                 activity,
                 showWeekDay = false,

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/agenda/AgendaFragment.kt

@@ -21,6 +21,7 @@ import kotlinx.coroutines.*
 import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.MainActivity
 import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.db.entity.EventType
 import pl.szczodrzynski.edziennik.data.db.entity.Metadata
 import pl.szczodrzynski.edziennik.data.db.entity.Profile
 import pl.szczodrzynski.edziennik.databinding.FragmentAgendaCalendarBinding
@@ -136,9 +137,22 @@ class AgendaFragment : Fragment(), CoroutineScope {
         }
     }
 
+    private suspend fun checkEventTypes() {
+        withContext(Dispatchers.Default) {
+            val eventTypes = app.db.eventTypeDao().getAllNow(app.profileId).map {
+                it.id
+            }
+            val defaultEventTypes = EventType.getTypeColorMap().keys
+            if (!eventTypes.containsAll(defaultEventTypes)) {
+                app.db.eventTypeDao().addDefaultTypes(activity, app.profileId)
+            }
+        }
+    }
+
     private fun createDefaultAgendaView() { (b as? FragmentAgendaDefaultBinding)?.let { b -> launch {
         if (!isAdded)
             return@launch
+        checkEventTypes()
         delay(500)
 
         agendaDefault = AgendaFragmentDefault(activity, app, b)
@@ -146,6 +160,7 @@ class AgendaFragment : Fragment(), CoroutineScope {
     }}}
 
     private fun createCalendarAgendaView() { (b as? FragmentAgendaCalendarBinding)?.let { b -> launch {
+        checkEventTypes()
         delay(300)
 
         val dayList = mutableListOf<EventDay>()

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/base/lazypager/FragmentLazyPagerAdapter.kt

@@ -9,7 +9,7 @@ import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 
 class FragmentLazyPagerAdapter(
         fragmentManager: FragmentManager,
-        swipeRefreshLayout: SwipeRefreshLayout,
+        swipeRefreshLayout: SwipeRefreshLayout? = null,
         val fragments: List<Pair<LazyFragment, CharSequence>>
 ) : LazyPagerAdapter(fragmentManager, swipeRefreshLayout) {
     override fun getPage(position: Int) = fragments[position].first

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/debug/LabFragment.kt

@@ -41,6 +41,7 @@ class LabFragment : Fragment(), CoroutineScope {
         app = activity.application as App
         b = TemplateFragmentBinding.inflate(inflater)
         b.refreshLayout.setParent(activity.swipeRefreshLayout)
+        b.refreshLayout.isEnabled = false
         return b.root
     }
 

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/debug/LabPageFragment.kt

@@ -5,15 +5,18 @@
 package pl.szczodrzynski.edziennik.ui.modules.debug
 
 import android.os.Bundle
+import android.os.Process
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.sqlite.db.SimpleSQLiteQuery
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import pl.szczodrzynski.edziennik.*
+import pl.szczodrzynski.edziennik.config.Config
 import pl.szczodrzynski.edziennik.data.db.entity.Event
 import pl.szczodrzynski.edziennik.databinding.LabFragmentBinding
 import pl.szczodrzynski.edziennik.ui.dialogs.profile.ProfileRemoveDialog
@@ -21,6 +24,7 @@ import pl.szczodrzynski.edziennik.ui.modules.base.lazypager.LazyFragment
 import pl.szczodrzynski.edziennik.utils.TextInputDropDown
 import pl.szczodrzynski.fslogin.decode
 import kotlin.coroutines.CoroutineContext
+import kotlin.system.exitProcess
 
 class LabPageFragment : LazyFragment(), CoroutineScope {
     companion object {
@@ -75,12 +79,51 @@ class LabPageFragment : LazyFragment(), CoroutineScope {
             app.db.eventDao().getRawNow("UPDATE events SET homeworkBody = NULL WHERE profileId = ${App.profileId}")
         }
 
+        b.chucker.isChecked = App.enableChucker
+        b.chucker.onChange { _, isChecked ->
+            app.config.enableChucker = isChecked
+            App.enableChucker = isChecked
+            MaterialAlertDialogBuilder(activity)
+                .setTitle("Restart")
+                .setMessage("Wymagany restart aplikacji")
+                .setPositiveButton(R.string.ok) { _, _ ->
+                    Process.killProcess(Process.myPid())
+                    Runtime.getRuntime().exit(0)
+                    exitProcess(0)
+                }
+                .setCancelable(false)
+                .show()
+        }
+
+        b.disableDebug.onClick {
+            app.config.devMode = false
+            App.devMode = false
+            MaterialAlertDialogBuilder(activity)
+                .setTitle("Restart")
+                .setMessage("Wymagany restart aplikacji")
+                .setPositiveButton(R.string.ok) { _, _ ->
+                    Process.killProcess(Process.myPid())
+                    Runtime.getRuntime().exit(0)
+                    exitProcess(0)
+                }
+                .setCancelable(false)
+                .show()
+        }
+
         b.unarchive.onClick {
             app.profile.archived = false
             app.profile.archiveId = null
             app.profileSave()
         }
 
+        b.resetCert.onClick {
+            app.config.apiInvalidCert = null
+        }
+
+        b.rebuildConfig.onClick {
+            App.config = Config(App.db)
+        }
+
         val profiles = app.db.profileDao().allNow
         b.profile.clear()
         b.profile += profiles.map { TextInputDropDown.Item(it.id.toLong(), "${it.id} ${it.name} archived ${it.archived}", tag = it) }

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/debug/LabProfileFragment.kt

@@ -166,7 +166,7 @@ class LabProfileFragment : LazyFragment(), CoroutineScope {
             json.add("App.profile", app.gson.toJsonTree(app.profile))
             json.add("App.profile.studentData", app.profile.studentData)
             json.add("App.profile.loginStore", loginStore?.data ?: JsonObject())
-            json.add("App.config", JsonParser().parse(app.gson.toJson(app.config.values)))
+            json.add("App.config", JsonParser().parse(app.gson.toJson(app.config.values.toSortedMap())))
         }
         adapter.items = LabJsonAdapter.expand(json, 0)
         adapter.notifyDataSetChanged()

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/home/HomeFragment.kt

@@ -163,10 +163,9 @@ class HomeFragment : Fragment(), CoroutineScope {
         if (app.profile.archived)
             items.add(0, HomeArchiveCard(101, app, activity, this, app.profile))
 
-        val status = app.config.sync.registerAvailability[app.profile.registerName]
+        val status = app.availabilityManager.check(app.profile, cacheOnly = true)?.status
         val update = app.config.update
-        if (update != null && update.versionCode > BuildConfig.VERSION_CODE
+        if (update != null && update.versionCode > BuildConfig.VERSION_CODE || status?.userMessage != null) {
-                || status != null && (!status.available || status.minVersionCode > BuildConfig.VERSION_CODE)) {
             items.add(0, HomeAvailabilityCard(102, app, activity, this, app.profile))
         }
 

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/home/cards/HomeAvailabilityCard.kt

@@ -50,7 +50,8 @@ class HomeAvailabilityCard(
         }
         holder.root += b.root
 
-        val status = app.config.sync.registerAvailability[profile.registerName]
+        val error = app.availabilityManager.check(profile, cacheOnly = true)
+        val status = error?.status
         val update = app.config.update
 
         if (update == null && status == null)
@@ -58,7 +59,8 @@ class HomeAvailabilityCard(
 
         var onInfoClick = { _: View -> }
 
-        if (status != null && !status.available && status.userMessage != null) {
+        // show "register unavailable" only when disabled
+        if (status?.userMessage != null) {
             b.homeAvailabilityTitle.text = HtmlCompat.fromHtml(status.userMessage.title, HtmlCompat.FROM_HTML_MODE_LEGACY)
             b.homeAvailabilityText.text = HtmlCompat.fromHtml(status.userMessage.contentShort, HtmlCompat.FROM_HTML_MODE_LEGACY)
             b.homeAvailabilityUpdate.isVisible = false
@@ -69,6 +71,7 @@ class HomeAvailabilityCard(
                 RegisterUnavailableDialog(activity, status)
             }
         }
+        // show "update available" when available OR version too old for the register
         else if (update != null && update.versionCode > BuildConfig.VERSION_CODE) {
             b.homeAvailabilityTitle.setText(R.string.home_availability_title)
             b.homeAvailabilityText.setText(R.string.home_availability_text, update.versionName)
@@ -78,6 +81,9 @@ class HomeAvailabilityCard(
                 UpdateAvailableDialog(activity, update)
             }
         }
+        else {
+            b.root.isVisible = false
+        }
 
         b.homeAvailabilityUpdate.onClick {
             if (update == null)

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginChooserFragment.kt

@@ -26,13 +26,12 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import kotlinx.coroutines.*
 import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.data.api.*
-import pl.szczodrzynski.edziennik.data.api.szkolny.SzkolnyApi
-import pl.szczodrzynski.edziennik.data.api.szkolny.response.RegisterAvailabilityStatus
 import pl.szczodrzynski.edziennik.databinding.LoginChooserFragmentBinding
 import pl.szczodrzynski.edziennik.ui.dialogs.RegisterUnavailableDialog
 import pl.szczodrzynski.edziennik.ui.modules.feedback.FeedbackActivity
 import pl.szczodrzynski.edziennik.utils.BetterLinkMovementMethod
 import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+import pl.szczodrzynski.edziennik.utils.managers.AvailabilityManager.Error.Type
 import pl.szczodrzynski.edziennik.utils.models.Date
 import kotlin.coroutines.CoroutineContext
 
@@ -269,52 +268,23 @@ class LoginChooserFragment : Fragment(), CoroutineScope {
     }
 
     private suspend fun checkAvailability(loginType: Int): Boolean {
-        when (loginType) {
+        val error = withContext(Dispatchers.IO) {
-            LOGIN_TYPE_LIBRUS -> "librus"
+            app.availabilityManager.check(loginType)
-            LOGIN_TYPE_VULCAN -> "vulcan"
+        } ?: return true
-            LOGIN_TYPE_IDZIENNIK -> "idziennik"
-            LOGIN_TYPE_MOBIDZIENNIK -> "mobidziennik"
-            LOGIN_TYPE_PODLASIE -> "podlasie"
-            LOGIN_TYPE_EDUDZIENNIK -> "edudziennik"
-            else -> null
-        }?.let { registerName ->
-            var status = app.config.sync.registerAvailability[registerName]
-            if (status == null || status.nextCheckAt < currentTimeUnix()) {
-                val api = SzkolnyApi(app)
-                val result = withContext(Dispatchers.IO) {
-                    return@withContext api.runCatching({
-                        val availability = getRegisterAvailability()
-                        app.config.sync.registerAvailability = availability
-                        availability[registerName]
-                    }, onError = {
-                        if (it.toErrorCode() == ERROR_API_INVALID_SIGNATURE) {
-                            return@withContext false
-                        }
-                        return@withContext it
-                    })
-                }
 
-                when (result) {
+        return when (error.type) {
-                    false -> {
+            Type.NOT_AVAILABLE -> {
+                RegisterUnavailableDialog(activity, error.status!!)
+                false
+            }
+            Type.API_ERROR -> {
+                activity.errorSnackbar.addError(error.apiError!!).show()
+                false
+            }
+            Type.NO_API_ACCESS -> {
                 Toast.makeText(activity, R.string.error_no_api_access, Toast.LENGTH_SHORT).show()
-                        return@let
+                true
-                    }
-                    is Throwable -> {
-                        activity.errorSnackbar.addError(result.toApiError(TAG)).show()
-                        return false
-                    }
-                    is RegisterAvailabilityStatus -> {
-                        status = result
             }
         }
     }
-
-            if (status?.available != true || status.minVersionCode > BuildConfig.VERSION_CODE) {
-                if (status != null)
-                    RegisterUnavailableDialog(activity, status)
-                return false
-            }
-        }
-        return true
-    }
 }

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginFormFragment.kt

@@ -85,6 +85,9 @@ class LoginFormFragment : Fragment(), CoroutineScope {
             if (credential is LoginInfo.FormField) {
                 val b = LoginFormFieldItemBinding.inflate(layoutInflater)
                 b.textLayout.hint = app.getString(credential.name)
+                if (credential.isNumber) {
+                    b.textEdit.inputType = InputType.TYPE_CLASS_NUMBER
+                }
                 if (credential.hideText) {
                     b.textEdit.inputType = InputType.TYPE_TEXT_VARIATION_PASSWORD
                     b.textLayout.endIconMode = TextInputLayout.END_ICON_PASSWORD_TOGGLE

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginInfo.kt

@@ -179,6 +179,7 @@ object LoginInfo {
                                     ERROR_LOGIN_VULCAN_INVALID_PIN_2_REMAINING to R.string.error_312_reason
                                 ),
                                 isRequired = true,
+                                isNumber = true,
                                 validationRegex = "[0-9]+",
                                 caseMode = FormField.CaseMode.LOWER_CASE
                             )
@@ -401,6 +402,7 @@ object LoginInfo {
         val validationRegex: String,
         val caseMode: CaseMode = CaseMode.UNCHANGED,
         val hideText: Boolean = false,
+        val isNumber: Boolean = false,
         val stripTextRegex: String? = null
     ) : BaseCredential(keyName, name, errorCodes) {
         enum class CaseMode { UNCHANGED, UPPER_CASE, LOWER_CASE }

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginPrizeFragment.kt

@@ -53,7 +53,7 @@ class LoginPrizeFragment : Fragment(), CoroutineScope {
                     .setTitle(R.string.are_you_sure)
                     .setMessage(R.string.dev_mode_enable_warning)
                     .setPositiveButton(R.string.yes) { _, _ ->
-                        app.config.debugMode = true
+                        app.config.devMode = true
                         App.devMode = true
                         MaterialAlertDialogBuilder(activity)
                                 .setTitle("Restart")
@@ -67,8 +67,8 @@ class LoginPrizeFragment : Fragment(), CoroutineScope {
                                 .show()
                     }
                     .setNegativeButton(R.string.no) { _, _ ->
-                        app.config.debugMode = false
+                        app.config.devMode = App.debugMode
-                        App.devMode = false
+                        App.devMode = App.debugMode
                         activity.finish()
                     }
                     .show()

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/login/LoginProgressFragment.kt

@@ -76,7 +76,7 @@ class LoginProgressFragment : Fragment(), CoroutineScope {
 
             val maxProfileId = max(
                     app.db.profileDao().lastId ?: 0,
-                    activity.profiles.maxBy { it.profile.id }?.profile?.id ?: 0
+                    activity.profiles.maxByOrNull { it.profile.id }?.profile?.id ?: 0
             )
             val loginType = args.getInt("loginType", -1)
             val loginMode = args.getInt("loginMode", 0)

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/messages/compose/MessagesComposeFragment.kt

@@ -503,10 +503,14 @@ class MessagesComposeFragment : Fragment(), CoroutineScope {
             text.toString()
         }
 
+        textHtml = textHtml
+            .replace("</b><b>", "")
+            .replace("</i><i>", "")
+            .replace("p style=\"margin-top:0; margin-bottom:0;\"", "p")
+
         if (app.profile.loginStoreType == LoginStore.LOGIN_TYPE_MOBIDZIENNIK) {
             textHtml = textHtml
-                    .replace("p style=\"margin-top:0; margin-bottom:0;\"", "span")
+                    .replace("</p><br>", "</p>")
-                    .replace("</p>", "</span>")
                     .replace("<b>", "<strong>")
                     .replace("</b>", "</strong>")
                     .replace("<i>", "<em>")

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/settings/cards/SettingsAboutCard.kt

@@ -24,6 +24,7 @@ import pl.szczodrzynski.edziennik.ui.dialogs.changelog.ChangelogDialog
 import pl.szczodrzynski.edziennik.ui.modules.settings.SettingsCard
 import pl.szczodrzynski.edziennik.ui.modules.settings.SettingsLicenseActivity
 import pl.szczodrzynski.edziennik.ui.modules.settings.SettingsUtil
+import pl.szczodrzynski.edziennik.ui.modules.settings.contributors.ContributorsActivity
 import pl.szczodrzynski.edziennik.utils.Utils
 import kotlin.coroutines.CoroutineContext
 
@@ -90,6 +91,14 @@ class SettingsAboutCard(util: SettingsUtil) : SettingsCard(util), CoroutineScope
             it.subText = BuildConfig.VERSION_NAME + ", " + BuildConfig.BUILD_TYPE
         },
 
+        util.createActionItem(
+            text = R.string.settings_about_contributors_text,
+            subText = R.string.settings_about_contributors_subtext,
+            icon = CommunityMaterial.Icon.cmd_account_group_outline
+        ) {
+            activity.startActivity(Intent(activity, ContributorsActivity::class.java))
+        },
+
         util.createMoreItem(card, items = listOf(
             util.createActionItem(
                 text = R.string.settings_about_changelog_text,

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/settings/cards/SettingsThemeCard.kt

@@ -88,7 +88,7 @@ class SettingsThemeCard(util: SettingsUtil) : SettingsCard(util) {
             text = R.string.settings_theme_drawer_header_text,
             icon = CommunityMaterial.Icon2.cmd_image_outline
         ) {
-            if (app.config.ui.appBackground == null) {
+            if (app.config.ui.headerBackground == null) {
                 setHeaderBackground()
                 return@createActionItem
             }

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/settings/contributors/ContributorsActivity.kt

@@ -0,0 +1,83 @@
+package pl.szczodrzynski.edziennik.ui.modules.settings.contributors
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
+import androidx.viewpager.widget.ViewPager
+import com.google.android.material.tabs.TabLayout
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.Bundle
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.api.szkolny.SzkolnyApi
+import pl.szczodrzynski.edziennik.data.api.szkolny.response.ContributorsResponse
+import pl.szczodrzynski.edziennik.databinding.ContributorsActivityBinding
+import pl.szczodrzynski.edziennik.ui.modules.base.lazypager.FragmentLazyPagerAdapter
+import pl.szczodrzynski.edziennik.ui.modules.error.ErrorSnackbar
+import kotlin.coroutines.CoroutineContext
+
+class ContributorsActivity : AppCompatActivity(), CoroutineScope {
+    companion object {
+        private const val TAG = "ContributorsActivity"
+        private var contributors: ContributorsResponse? = null
+    }
+
+    private lateinit var app: App
+    private lateinit var b: ContributorsActivityBinding
+
+    private var job = Job()
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+
+    // local/private variables go here
+    private val errorSnackbar: ErrorSnackbar by lazy { ErrorSnackbar(this) }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        app = application as App
+        b = ContributorsActivityBinding.inflate(layoutInflater)
+        setContentView(b.root)
+
+        b.progressBar.isVisible = true
+        b.tabLayout.isVisible = false
+        b.viewPager.isVisible = false
+
+        launch {
+            contributors = contributors ?: SzkolnyApi(app).runCatching(errorSnackbar) {
+                getContributors()
+            } ?: return@launch
+
+            val pagerAdapter = FragmentLazyPagerAdapter(
+                supportFragmentManager,
+                fragments = listOf(
+                    ContributorsFragment().apply {
+                        arguments = Bundle(
+                            "items" to contributors!!.contributors.toTypedArray(),
+                            "quantityPluralRes" to R.plurals.contributions_quantity,
+                        )
+                    } to getString(R.string.contributors),
+
+                    ContributorsFragment().apply {
+                        arguments = Bundle(
+                            "items" to contributors!!.translators.toTypedArray(),
+                            "quantityPluralRes" to R.plurals.translations_quantity,
+                        )
+                    } to getString(R.string.translators),
+                )
+            )
+
+            b.viewPager.apply {
+                offscreenPageLimit = 1
+                adapter = pagerAdapter
+                b.tabLayout.setupWithViewPager(this)
+            }
+
+            b.progressBar.isVisible = false
+            b.tabLayout.isVisible = true
+            b.viewPager.isVisible = true
+        }
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/settings/contributors/ContributorsAdapter.kt

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-9-7.
+ */
+
+package pl.szczodrzynski.edziennik.ui.modules.settings.contributors
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.annotation.PluralsRes
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.RecyclerView
+import coil.load
+import coil.transform.CircleCropTransformation
+import pl.szczodrzynski.edziennik.R
+import pl.szczodrzynski.edziennik.data.api.szkolny.response.ContributorsResponse
+import pl.szczodrzynski.edziennik.databinding.ContributorsListItemBinding
+import pl.szczodrzynski.edziennik.plural
+import pl.szczodrzynski.edziennik.setText
+import pl.szczodrzynski.edziennik.utils.Utils
+
+class ContributorsAdapter(
+    val activity: AppCompatActivity,
+    val items: List<ContributorsResponse.Item>,
+    @PluralsRes
+    val quantityPluralRes: Int
+) : RecyclerView.Adapter<ContributorsAdapter.ViewHolder>() {
+    companion object {
+        private const val TAG = "ContributorsAdapter"
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val inflater = LayoutInflater.from(parent.context)
+        val view = ContributorsListItemBinding.inflate(inflater, parent, false)
+        return ViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val item = items[position]
+        val b = holder.b
+
+        b.text.text = item.name ?: item.login
+        b.subtext.setText(
+            R.string.contributors_subtext_format,
+            item.login,
+            activity.plural(
+                quantityPluralRes,
+                item.contributions ?: 0
+            )
+        )
+
+        b.image.load(item.avatarUrl) {
+            transformations(CircleCropTransformation())
+        }
+
+        b.root.setOnClickListener {
+            Utils.openUrl(activity, item.itemUrl)
+        }
+    }
+
+    override fun getItemCount() = items.size
+
+    class ViewHolder(val b: ContributorsListItemBinding) : RecyclerView.ViewHolder(b.root)
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/settings/contributors/ContributorsFragment.kt

@@ -0,0 +1,47 @@
+package pl.szczodrzynski.edziennik.ui.modules.settings.contributors
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.LinearLayoutManager
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.data.api.szkolny.response.ContributorsResponse
+import pl.szczodrzynski.edziennik.databinding.ContributorsListFragmentBinding
+import pl.szczodrzynski.edziennik.ui.modules.base.lazypager.LazyFragment
+import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
+
+class ContributorsFragment : LazyFragment() {
+    companion object {
+        private const val TAG = "ContributorsFragment"
+    }
+
+    private lateinit var app: App
+    private lateinit var activity: ContributorsActivity
+    private lateinit var b: ContributorsListFragmentBinding
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        activity = (getActivity() as ContributorsActivity?) ?: return null
+        context ?: return null
+        app = activity.application as App
+        b = ContributorsListFragmentBinding.inflate(inflater)
+        return b.root
+    }
+
+    override fun onPageCreated(): Boolean {
+        val contributorsArray = requireArguments().getParcelableArray("items") as Array<ContributorsResponse.Item>
+        val contributors = contributorsArray.toList()
+        val quantityPluralRes = requireArguments().getInt("quantityPluralRes")
+
+        val adapter = ContributorsAdapter(activity, contributors, quantityPluralRes)
+        b.list.adapter = adapter
+        b.list.apply {
+            setHasFixedSize(true)
+            layoutManager = LinearLayoutManager(context)
+            addItemDecoration(SimpleDividerItemDecoration(context))
+            addOnScrollListener(onScrollListener)
+        }
+
+        return true
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/TimetableDayFragment.kt

@@ -9,19 +9,24 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.FrameLayout
+import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.asynclayoutinflater.view.AsyncLayoutInflater
-import androidx.core.view.isVisible
+import androidx.core.view.*
-import androidx.core.view.marginTop
-import androidx.core.view.setPadding
-import androidx.core.view.updateLayoutParams
 import com.linkedin.android.tachyon.DayView
 import com.linkedin.android.tachyon.DayViewConfig
+import com.mikepenz.iconics.IconicsDrawable
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import com.mikepenz.iconics.utils.colorInt
+import com.mikepenz.iconics.utils.sizeDp
+import eu.szkolny.font.SzkolnyFont
 import kotlinx.coroutines.*
 import pl.szczodrzynski.edziennik.*
 import pl.szczodrzynski.edziennik.MainActivity.Companion.DRAWER_ITEM_TIMETABLE
 import pl.szczodrzynski.edziennik.data.api.edziennik.EdziennikTask
+import pl.szczodrzynski.edziennik.data.db.entity.Attendance
 import pl.szczodrzynski.edziennik.data.db.entity.Lesson
+import pl.szczodrzynski.edziennik.data.db.full.AttendanceFull
 import pl.szczodrzynski.edziennik.data.db.full.EventFull
 import pl.szczodrzynski.edziennik.data.db.full.LessonFull
 import pl.szczodrzynski.edziennik.databinding.TimetableDayFragmentBinding
@@ -61,6 +66,8 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
 
     private val manager
         get() = app.timetableManager
+    private val attendanceManager
+        get() = app.attendanceManager
 
     // find SwipeRefreshLayout in the hierarchy
     private val refreshLayout by lazy { view?.findParentById(R.id.refreshLayout) }
@@ -102,14 +109,17 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
                 val events = withContext(Dispatchers.Default) {
                     app.db.eventDao().getAllByDateNow(App.profileId, date)
                 }
-                processLessonList(lessons, events)
+                val attendanceList = withContext(Dispatchers.Default) {
+                    app.db.attendanceDao().getAllByDateNow(App.profileId, date)
+                }
+                processLessonList(lessons, events, attendanceList)
             }
         }
 
         return true
     }
 
-    private fun processLessonList(lessons: List<LessonFull>, events: List<EventFull>) {
+    private fun processLessonList(lessons: List<LessonFull>, events: List<EventFull>, attendanceList: List<AttendanceFull>) {
         // no lessons - timetable not downloaded yet
         if (lessons.isEmpty()) {
             inflater.inflate(R.layout.timetable_no_timetable, b.root) { view, _, _ ->
@@ -151,7 +161,7 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
         }
 
         b.scrollView.isVisible = true
-        b.dayFrame.removeView(b.dayView)
+        b.dayFrame.removeView(dayView)
         b.dayFrame.addView(dayView, 0)
 
         // Inflate a label view for each hour the day view will display
@@ -172,10 +182,10 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
 
         lessons.forEach { it.showAsUnseen = !it.seen }
 
-        buildLessonViews(lessons.filter { it.type != Lesson.TYPE_NO_LESSONS }, events)
+        buildLessonViews(lessons.filter { it.type != Lesson.TYPE_NO_LESSONS }, events, attendanceList)
     }
 
-    private fun buildLessonViews(lessons: List<LessonFull>, events: List<EventFull>) {
+    private fun buildLessonViews(lessons: List<LessonFull>, events: List<EventFull>, attendanceList: List<AttendanceFull>) {
         if (!isAdded)
             return
 
@@ -192,6 +202,7 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
         val colorSecondary = android.R.attr.textColorSecondary.resolveAttr(activity)
 
         for (lesson in lessons) {
+            val attendance = attendanceList.find { it.startTime == lesson.startTime }
             val startTime = lesson.displayStartTime ?: continue
             val endTime = lesson.displayEndTime ?: continue
 
@@ -208,11 +219,17 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
             val lb = TimetableLessonBinding.bind(eventView)
             eventViews += eventView
 
-            eventView.tag = lesson
+            eventView.tag = lesson to attendance
 
             eventView.setOnClickListener {
-                if (isAdded && it.tag is LessonFull)
+                if (isAdded && it.tag is Pair<*, *>) {
-                    LessonDetailsDialog(activity, it.tag as LessonFull)
+                    val (lessonObj, attendanceObj) = it.tag as Pair<*, *>
+                    LessonDetailsDialog(
+                        activity = activity,
+                        lesson = lessonObj as LessonFull,
+                        attendance = attendanceObj as AttendanceFull?
+                    )
+                }
             }
 
             val eventList = events.filter { it.time != null && it.time == lesson.displayStartTime }.take(3)
@@ -276,6 +293,18 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
             lb.detailsFirst.text = listOfNotEmpty(timeRange, classroomInfo).concat(bullet)
             lb.detailsSecond.text = listOfNotEmpty(teacherInfo, teamInfo).concat(bullet)
 
+            lb.attendanceIcon.isVisible = attendance?.let {
+                val icon = attendanceManager.getAttendanceIcon(it) ?: return@let false
+                val color = attendanceManager.getAttendanceColor(it)
+                lb.attendanceIcon.setImageDrawable(
+                    IconicsDrawable(activity, icon).apply {
+                        colorInt = color
+                        sizeDp = 24
+                    }
+                )
+                true
+            } ?: false
+
             lb.unread = lesson.type != Lesson.TYPE_NORMAL && lesson.showAsUnseen
             if (!lesson.seen) {
                 manager.markAsSeen(lesson)
@@ -283,6 +312,12 @@ class TimetableDayFragment : LazyFragment(), CoroutineScope {
 
             //lb.subjectName.typeface = Typeface.create("sans-serif-light", Typeface.BOLD)
             lb.annotationVisible = manager.getAnnotation(activity, lesson, lb.annotation)
+            val lessonNumberMargin =
+                if (lb.annotationVisible) (-8).dp
+                else 0
+            lb.lessonNumberText.updateLayoutParams<LinearLayout.LayoutParams> {
+                updateMargins(top = lessonNumberMargin, bottom = lessonNumberMargin)
+            }
 
             // The day view needs the event time ranges in the start minute/end minute format,
             // so calculate those here

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/timetable/TimetableFragment.kt

@@ -120,8 +120,8 @@ class TimetableFragment : Fragment(), CoroutineScope {
             }
 
             val lessonRanges = app.db.lessonRangeDao().getAllNow(App.profileId)
-            startHour = lessonRanges.map { it.startTime.hour }.min() ?: DEFAULT_START_HOUR
+            startHour = lessonRanges.map { it.startTime.hour }.minOrNull() ?: DEFAULT_START_HOUR
-            endHour = lessonRanges.map { it.endTime.hour }.max()?.plus(1) ?: DEFAULT_END_HOUR
+            endHour = lessonRanges.map { it.endTime.hour }.maxOrNull()?.plus(1) ?: DEFAULT_END_HOUR
         }
         deferred.await()
         if (!isAdded)

app/src/main/java/pl/szczodrzynski/edziennik/ui/modules/views/AttachmentsView.kt

@@ -37,9 +37,7 @@ class AttachmentsView @JvmOverloads constructor(
     }
 
     private val storageDir by lazy {
-        val storageDir = Environment.getExternalStoragePublicDirectory("Szkolny.eu")
+        Utils.getStorageDir()
-        storageDir.mkdirs()
-        storageDir
     }
 
     fun init(arguments: Bundle, owner: Any) {
@@ -82,6 +80,7 @@ class AttachmentsView @JvmOverloads constructor(
             list.adapter = adapter
             list.apply {
                 setHasFixedSize(false)
+                isNestedScrollingEnabled = false
                 layoutManager = LinearLayoutManager(context)
                 addItemDecoration(SimpleDividerItemDecoration(context))
             }

app/src/main/java/pl/szczodrzynski/edziennik/utils/Utils.java

@@ -776,7 +776,8 @@ public class Utils {
     public static File getStorageDir() {
         if (storageDir != null)
             return storageDir;
-        storageDir = Environment.getExternalStoragePublicDirectory("Szkolny.eu");
+        storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
+        storageDir = new File(storageDir, "Szkolny.eu");
         storageDir.mkdirs();
         return storageDir;
     }

app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/AttendanceManager.kt

@@ -4,6 +4,9 @@
 
 package pl.szczodrzynski.edziennik.utils.managers
 
+import com.mikepenz.iconics.typeface.IIcon
+import com.mikepenz.iconics.typeface.library.community.material.CommunityMaterial
+import eu.szkolny.font.SzkolnyFont
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -63,6 +66,17 @@ class AttendanceManager(val app: App) : CoroutineScope {
                 else getAttendanceColor(attendance.baseType)
     }
 
+    fun getAttendanceIcon(attendance: Attendance): IIcon? = when (attendance.baseType) {
+        Attendance.TYPE_PRESENT, Attendance.TYPE_PRESENT_CUSTOM -> CommunityMaterial.Icon.cmd_check
+        Attendance.TYPE_ABSENT -> CommunityMaterial.Icon.cmd_close
+        Attendance.TYPE_ABSENT_EXCUSED -> CommunityMaterial.Icon3.cmd_progress_close
+        Attendance.TYPE_RELEASED -> CommunityMaterial.Icon.cmd_account_arrow_right_outline
+        Attendance.TYPE_BELATED -> CommunityMaterial.Icon.cmd_clock_alert_outline
+        Attendance.TYPE_BELATED_EXCUSED -> CommunityMaterial.Icon.cmd_clock_check_outline
+        Attendance.TYPE_DAY_FREE -> SzkolnyFont.Icon.szf_umbrella_beach_outline
+        else -> null
+    }
+
     /*    _    _ _____    _____                 _  __ _
          | |  | |_   _|  / ____|               (_)/ _(_)
          | |  | | | |   | (___  _ __   ___  ___ _| |_ _  ___

app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/AvailabilityManager.kt

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) Kuba Szczodrzyński 2021-9-18.
+ */
+
+package pl.szczodrzynski.edziennik.utils.managers
+
+import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.BuildConfig
+import pl.szczodrzynski.edziennik.currentTimeUnix
+import pl.szczodrzynski.edziennik.data.api.*
+import pl.szczodrzynski.edziennik.data.api.models.ApiError
+import pl.szczodrzynski.edziennik.data.api.szkolny.SzkolnyApi
+import pl.szczodrzynski.edziennik.data.api.szkolny.response.RegisterAvailabilityStatus
+import pl.szczodrzynski.edziennik.data.db.entity.Profile
+import pl.szczodrzynski.edziennik.toApiError
+
+class AvailabilityManager(val app: App) {
+    companion object {
+        private const val TAG = "AvailabilityManager"
+    }
+
+    private val api = SzkolnyApi(app)
+
+    data class Error(
+        val type: Type,
+        val status: RegisterAvailabilityStatus?,
+        val apiError: ApiError?
+    ) {
+        companion object {
+            fun notAvailable(status: RegisterAvailabilityStatus) =
+                Error(Type.NOT_AVAILABLE, status, null)
+
+            fun apiError(apiError: ApiError) =
+                Error(Type.API_ERROR, null, apiError)
+
+            fun noApiAccess() =
+                Error(Type.NO_API_ACCESS, null, null)
+        }
+
+        enum class Type {
+            NOT_AVAILABLE,
+            API_ERROR,
+            NO_API_ACCESS,
+        }
+    }
+
+    fun check(profile: Profile, cacheOnly: Boolean = false): Error? {
+        return check(profile.registerName, cacheOnly)
+    }
+
+    fun check(loginType: Int, cacheOnly: Boolean = false): Error? {
+        val registerName = when (loginType) {
+            LOGIN_TYPE_LIBRUS -> "librus"
+            LOGIN_TYPE_VULCAN -> "vulcan"
+            LOGIN_TYPE_IDZIENNIK -> "idziennik"
+            LOGIN_TYPE_MOBIDZIENNIK -> "mobidziennik"
+            LOGIN_TYPE_PODLASIE -> "podlasie"
+            LOGIN_TYPE_EDUDZIENNIK -> "edudziennik"
+            else -> "unknown"
+        }
+        return check(registerName, cacheOnly)
+    }
+
+    fun check(registerName: String, cacheOnly: Boolean = false): Error? {
+        if (!app.config.apiAvailabilityCheck)
+            return null
+        val status = app.config.sync.registerAvailability[registerName]
+        if (status != null && status.nextCheckAt > currentTimeUnix()) {
+            return reportStatus(status)
+        }
+        if (cacheOnly) {
+            return reportStatus(status)
+        }
+
+        return try {
+            val availability = api.getRegisterAvailability()
+            app.config.sync.registerAvailability = availability
+            reportStatus(availability[registerName])
+        } catch (e: Throwable) {
+            reportApiError(e)
+        }
+    }
+
+    private fun reportStatus(status: RegisterAvailabilityStatus?): Error? {
+        if (status == null)
+            return null
+        if (!status.available || status.minVersionCode > BuildConfig.VERSION_CODE)
+            return Error.notAvailable(status)
+        return null
+    }
+
+    private fun reportApiError(throwable: Throwable): Error {
+        val apiError = throwable.toApiError(TAG)
+        if (apiError.errorCode == ERROR_API_INVALID_SIGNATURE) {
+            app.config.sync.registerAvailability = mapOf()
+            return Error.noApiAccess()
+        }
+        return Error.apiError(apiError)
+    }
+}

app/src/main/res/layout/attendance_list_fragment.xml

@@ -24,6 +24,7 @@
             android:layout_gravity="center"
             android:drawablePadding="16dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/attendances_no_data"
             android:textSize="24sp"
             android:visibility="gone"

app/src/main/res/layout/attendance_summary_fragment.xml

@@ -152,6 +152,7 @@
                     android:layout_gravity="center"
                     android:drawablePadding="16dp"
                     android:fontFamily="sans-serif-light"
+                    android:gravity="center"
                     android:text="@string/attendances_no_data"
                     android:textSize="24sp"
                     android:visibility="gone"

app/src/main/res/layout/card_home_grades.xml

@@ -22,6 +22,7 @@
             android:layout_gravity="center_horizontal"
             android:layout_margin="16dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/card_grades_no_data"
             android:textSize="16sp" />
 

app/src/main/res/layout/card_home_template.xml

@@ -24,6 +24,7 @@
             android:layout_gravity="center_horizontal"
             android:layout_margin="16dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/card_grades_no_data"
             android:textSize="16sp" />
 

app/src/main/res/layout/contributors_activity.xml

@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <ProgressBar
+            android:id="@+id/progressBar"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:layout_gravity="center"
+            tools:visibility="gone" />
+
+        <androidx.coordinatorlayout.widget.CoordinatorLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:fitsSystemWindows="true">
+
+            <com.google.android.material.appbar.AppBarLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:minHeight="?actionBarSize">
+
+                <com.google.android.material.appbar.CollapsingToolbarLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:minHeight="?actionBarSize"
+                    app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">
+
+                    <LinearLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="match_parent"
+                        android:orientation="vertical"
+                        android:paddingBottom="?actionBarSize"
+                        app:layout_collapseMode="parallax"
+                        app:layout_collapseParallaxMultiplier="0.7">
+
+                        <ImageView
+                            android:layout_width="wrap_content"
+                            android:layout_height="wrap_content"
+                            android:layout_gravity="center_horizontal"
+                            android:layout_marginTop="16dp"
+                            android:scaleType="center"
+                            android:scaleX="0.8"
+                            android:scaleY="0.8"
+                            android:src="@mipmap/ic_splash" />
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginHorizontal="64dp"
+                            android:fontFamily="sans-serif-light"
+                            android:gravity="center"
+                            android:text="@string/app_name"
+                            android:textAppearance="@style/NavView.TextView.Large"
+                            android:textSize="28sp"
+                            android:textStyle="bold" />
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_marginHorizontal="64dp"
+                            android:layout_marginBottom="48dp"
+                            android:fontFamily="sans-serif-light"
+                            android:gravity="center"
+                            android:text="@string/contributors_headline"
+                            android:textAppearance="@style/NavView.TextView.Medium" />
+                    </LinearLayout>
+
+                    <com.google.android.material.tabs.TabLayout
+                        android:id="@+id/tabLayout"
+                        android:layout_width="match_parent"
+                        android:layout_height="?actionBarSize"
+                        android:layout_gravity="bottom"
+                        android:background="?android:colorBackground"
+                        android:foreground="@color/colorSurface_2dp"
+                        android:minHeight="?actionBarSize"
+                        android:visibility="gone"
+                        app:tabIndicatorColor="?colorPrimary"
+                        app:tabMode="auto"
+                        app:tabSelectedTextColor="?colorPrimary"
+                        app:tabTextColor="?android:textColorPrimary"
+                        tools:visibility="visible" />
+                </com.google.android.material.appbar.CollapsingToolbarLayout>
+            </com.google.android.material.appbar.AppBarLayout>
+
+            <pl.szczodrzynski.edziennik.ui.modules.base.lazypager.LazyViewPager
+                android:id="@+id/viewPager"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:visibility="gone"
+                app:layout_behavior="@string/appbar_scrolling_view_behavior"
+                tools:visibility="visible" />
+        </androidx.coordinatorlayout.widget.CoordinatorLayout>
+    </LinearLayout>
+</layout>

app/src/main/res/layout/contributors_list_fragment.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:listitem="@layout/contributors_list_item" />
+</layout>

app/src/main/res/layout/contributors_list_item.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?selectableItemBackground"
+        android:gravity="center_vertical"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:id="@+id/image"
+            android:layout_width="72dp"
+            android:layout_height="72dp"
+            android:padding="12dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:srcCompat="@drawable/ic_account_circle" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:orientation="vertical"
+            android:paddingHorizontal="8dp"
+            android:paddingVertical="16dp">
+
+            <TextView
+                android:id="@+id/text"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:ellipsize="end"
+                android:singleLine="true"
+                android:textAppearance="@style/NavView.TextView.Subtitle"
+                tools:text="der Librüsch" />
+
+            <TextView
+                android:id="@+id/subtext"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:ellipsize="end"
+                android:singleLine="true"
+                android:textAppearance="@style/NavView.TextView.Helper"
+                tools:text="[at]librüsch - ∞ contributions" />
+        </LinearLayout>
+    </LinearLayout>
+</layout>

app/src/main/res/layout/dialog_lesson_details.xml

@@ -134,7 +134,8 @@
                 android:layout_marginTop="8dp"
                 android:baselineAligned="false"
                 android:gravity="center_vertical"
-                android:orientation="horizontal">
+                android:orientation="horizontal"
+                android:visibility="gone">
 
                 <TextView
                     android:id="@+id/shiftedText"
@@ -290,6 +291,60 @@
 
             </LinearLayout>
 
+            <View
+                android:id="@+id/attendanceDivider"
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginTop="8dp"
+                android:background="@drawable/divider"/>
+
+            <LinearLayout
+                android:id="@+id/attendanceLayout"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginHorizontal="8dp"
+                android:layout_marginTop="8dp"
+                android:gravity="center_vertical"
+                android:orientation="horizontal">
+
+                <pl.szczodrzynski.edziennik.ui.modules.attendance.AttendanceView
+                    android:id="@+id/attendanceView"
+                    android:layout_width="36dp"
+                    android:layout_height="36dp"
+                    android:layout_marginEnd="8dp"
+                    android:layout_marginRight="8dp"
+                    tools:background="@drawable/bg_rounded_8dp"
+                    tools:backgroundTint="#f44336"
+                    tools:gravity="center"
+                    tools:text="nb"
+                    tools:textSize="22sp" />
+
+                <TextView
+                    android:id="@+id/attendanceType"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:maxLines="2"
+                    android:ellipsize="end"
+                    android:textSize="16sp"
+                    tools:text="nieobecność usprawiedliweniowsza1234324" />
+
+                <ImageView
+                    android:id="@+id/attendanceIcon"
+                    android:layout_width="24dp"
+                    android:layout_height="24dp"
+                    android:layout_marginHorizontal="8dp"
+                    tools:srcCompat="@sample/check" />
+
+                <Button
+                    android:id="@+id/attendanceDetails"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/dialog_lesson_attendance_details" />
+            </LinearLayout>
+
             <View
                 android:layout_width="match_parent"
                 android:layout_height="1dp"

app/src/main/res/layout/grades_item_stats.xml

@@ -32,6 +32,7 @@
             android:layout_gravity="center_horizontal"
             android:layout_margin="8dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/grades_stats_no_data"
             android:textSize="16sp"
             android:visibility="gone"

app/src/main/res/layout/grades_list_fragment.xml

@@ -29,6 +29,7 @@
                 android:layout_gravity="center"
                 android:drawablePadding="16dp"
                 android:fontFamily="sans-serif-light"
+                android:gravity="center"
                 android:text="@string/grades_no_data"
                 android:textSize="24sp"
                 android:visibility="gone"

app/src/main/res/layout/homework_list_fragment.xml

@@ -24,6 +24,7 @@
             android:layout_gravity="center"
             android:drawablePadding="16dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/homework_no_data"
             android:textSize="24sp"
             android:visibility="gone"

app/src/main/res/layout/lab_fragment.xml

@@ -1,14 +1,17 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?><!--
-<!--
   ~ Copyright (c) Kuba Szczodrzyński 2020-4-3.
   -->
 
-<layout xmlns:tools="http://schemas.android.com/tools"
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     tools:ignore="HardcodedText">
 
     <data>
-        <variable name="app" type="pl.szczodrzynski.edziennik.App"/>
+
+        <variable
+            name="app"
+            type="pl.szczodrzynski.edziennik.App" />
     </data>
 
     <ScrollView
@@ -38,6 +41,12 @@
                 android:layout_height="match_parent"
                 app:layout_behavior="@string/appbar_scrolling_view_behavior" />-->
 
+            <com.google.android.material.checkbox.MaterialCheckBox
+                android:id="@+id/chucker"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="Chucker" />
+
             <Button
                 android:id="@+id/last10unseen"
                 android:layout_width="match_parent"
@@ -92,15 +101,46 @@
 
             <pl.szczodrzynski.edziennik.utils.TextInputDropDown
                 android:id="@+id/profile"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
                 android:layout_width="match_parent"
-                android:layout_height="wrap_content"
+                android:layout_height="wrap_content" />
-                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox" />
 
             <com.google.android.material.checkbox.MaterialCheckBox
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:checked="@={app.config.archiverEnabled}"
                 android:text="Archiver enabled" />
+
+            <com.google.android.material.checkbox.MaterialCheckBox
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:checked="@={app.config.apiAvailabilityCheck}"
+                android:text="Availability check enabled" />
+
+            <Button
+                android:id="@+id/resetCert"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="Reset API signature"
+                android:textAllCaps="false" />
+
+            <Button
+                android:id="@+id/disableDebug"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
+                android:text="Disable Dev Mode"
+                android:textAllCaps="false"
+                app:backgroundTint="@color/windowBackgroundRed" />
+
+            <Button
+                android:id="@+id/rebuildConfig"
+                style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="16dp"
+                android:text="Rebuild App.config"
+                android:textAllCaps="false" />
         </LinearLayout>
     </ScrollView>
 </layout>

app/src/main/res/layout/message_fragment.xml

@@ -57,7 +57,7 @@
             android:visibility="visible"
             tools:visibility="gone"/>
 
-        <ScrollView
+        <androidx.core.widget.NestedScrollView
             android:id="@+id/content"
             android:layout_width="match_parent"
             android:layout_height="0dp"
@@ -306,6 +306,6 @@
                     </LinearLayout>
                 </LinearLayout>
             </LinearLayout>
-        </ScrollView>
+        </androidx.core.widget.NestedScrollView>
     </LinearLayout>
 </layout>

app/src/main/res/layout/messages_list_fragment.xml

@@ -24,6 +24,7 @@
             android:layout_gravity="center"
             android:drawablePadding="16dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/messages_no_data"
             android:textSize="24sp"
             android:visibility="gone"

app/src/main/res/layout/notifications_list_fragment.xml

@@ -24,6 +24,7 @@
             android:layout_gravity="center"
             android:drawablePadding="16dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/notifications_no_data"
             android:textSize="24sp"
             android:visibility="gone"

app/src/main/res/layout/template_list_fragment.xml

@@ -29,6 +29,7 @@
                 android:layout_gravity="center"
                 android:drawablePadding="16dp"
                 android:fontFamily="sans-serif-light"
+                android:gravity="center"
                 android:text="@string/grades_no_data"
                 android:textSize="24sp"
                 android:visibility="gone"

app/src/main/res/layout/template_list_page_fragment.xml

@@ -24,6 +24,7 @@
             android:layout_gravity="center"
             android:drawablePadding="16dp"
             android:fontFamily="sans-serif-light"
+            android:gravity="center"
             android:text="@string/grades_no_data"
             android:textSize="24sp"
             android:visibility="gone"

app/src/main/res/layout/timetable_day_fragment.xml

@@ -36,12 +36,6 @@
                 android:layout_marginHorizontal="8dp"
                 android:background="@color/md_red_500"
                 tools:layout_marginTop="100dp" />
-
-            <com.linkedin.android.tachyon.DayView
-                android:id="@+id/dayView"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                tools:layout_height="match_parent" />
         </FrameLayout>
     </pl.szczodrzynski.edziennik.utils.ListenerScrollView>
 

app/src/main/res/layout/timetable_lesson.xml

@@ -48,16 +48,16 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_gravity="top"
-                android:paddingHorizontal="8dp"
+                android:baselineAligned="false"
                 android:orientation="horizontal"
-                android:baselineAligned="false">
+                android:paddingHorizontal="8dp"
+                android:paddingVertical="4dp">
                 <!--tools:background="@drawable/timetable_subject_color_rounded"-->
 
                 <TextView
                     android:id="@+id/subjectName"
-                    android:layout_width="match_parent"
+                    android:layout_width="0dp"
                     android:layout_height="wrap_content"
-                    android:layout_marginVertical="4dp"
                     android:layout_weight="1"
                     android:ellipsize="end"
                     android:fontFamily="sans-serif-light"
@@ -75,8 +75,8 @@
                     android:layout_height="12dp"
                     android:layout_gravity="center_vertical"
                     android:layout_marginHorizontal="8dp"
-                    android:visibility="@{unread ? View.VISIBLE : View.GONE}"
+                    android:background="@drawable/unread_red_circle"
-                    android:background="@drawable/unread_red_circle" />
+                    android:visibility="@{unread ? View.VISIBLE : View.GONE}" />
 
                 <ImageView
                     android:id="@+id/attendanceIcon"
@@ -87,29 +87,18 @@
                     tools:srcCompat="@sample/check"
                     tools:visibility="visible" />
 
-                <ImageView
-                    android:id="@+id/imageView4"
-                    android:layout_width="24dp"
-                    android:layout_height="24dp"
-                    android:layout_weight="0"
-                    app:srcCompat="@drawable/bg_circle"
-                    android:visibility="gone" />
-
                 <TextView
-                    android:id="@+id/textView6"
+                    android:id="@+id/lessonNumberText"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="center_vertical"
                     android:fontFamily="sans-serif-condensed-light"
                     android:includeFontPadding="false"
-                    android:layout_marginBottom="-4dp"
                     android:paddingHorizontal="4dp"
                     android:text="@{Integer.toString(lessonNumber)}"
                     android:textSize="28sp"
                     android:visibility="@{lessonNumber != null ? View.VISIBLE : View.GONE}"
                     tools:text="3" />
-                <!--android:layout_marginTop="@{annotationVisible ? `-4dp` : `4dp`}"
-                    android:layout_marginBottom="@{annotationVisible ? `-4dp` : `0dp`}"-->
 
             </LinearLayout>
 
@@ -149,7 +138,8 @@
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"
                     android:gravity="end|bottom"
-                    android:orientation="horizontal">
+                    android:orientation="horizontal"
+                    android:paddingBottom="2dp">
 
                     <View
                         android:id="@+id/event3"

app/src/main/res/values-de/strings.xml

@@ -856,7 +856,7 @@
     <string name="settings_about_licenses_text">Open-Source-Lizenzen</string>
     <string name="settings_about_privacy_policy_text">Datenschutzrichtlinie</string>
     <string name="settings_card_register_title">E-Klassenbuch</string>
-    <string name="settings_about_title_subtext">© Kuba Szczodrzyński &amp;&amp; Kacper Ziubryniewicz\nSeptember 2018 - Juni 2021</string>
+    <string name="settings_about_title_subtext">© Kuba Szczodrzyński &amp;&amp; Kacper Ziubryniewicz\nSeptember 2018 - 2021</string>
     <string name="settings_about_update_subtext">Klicken Sie hier, um nach Aktualisierungen zu suchen</string>
     <string name="settings_about_update_text">Aktualisierung</string>
     <string name="settings_about_version_text">Version</string>
@@ -1234,4 +1234,6 @@
     <string name="you_are_offline_title">Netzwerkverbindung</string>
     <string name="login_summary_account_child">(Kind)</string>
     <string name="login_summary_account_parent">(Elternteil)</string>
+    <string name="settings_about_contributors_text">Anwendungsentwickler</string>
+    <string name="settings_about_contributors_subtext">Liste der Szkolny-Entwickler</string>
 </resources>

app/src/main/res/values-en/plurals.xml

@@ -55,4 +55,13 @@
         <item quantity="one">%1$s - %2$d unread</item>
         <item quantity="other">%1$s - %2$d unread</item>
     </plurals>
+
+    <plurals name="contributions_quantity">
+        <item quantity="one">%d contribution</item>
+        <item quantity="other">%d contributions</item>
+    </plurals>
+    <plurals name="translations_quantity">
+        <item quantity="one">%d translation</item>
+        <item quantity="other">%d translations</item>
+    </plurals>
 </resources>