From 43cb667614bac276ecba09b5a1463257eaa943ac Mon Sep 17 00:00:00 2001
From: n08i40k <nhomcencko1@gmail.com>
Date: Sun, 6 Oct 2024 02:56:18 +0400
Subject: [PATCH] 1.6.0
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Поддержка Firebase Remote Config.

Уведомления об обновлении приложения.

Добавлен TopBar с проверкой обновлений.

Удалены некоторые уже не важные логи.
---
 .idea/appInsightsSettings.xml                 |  27 ---
 .idea/compiler.xml                            |   2 +-
 .idea/gradle.xml                              |   1 +
 .idea/misc.xml                                |   2 +-
 app/build.gradle.kts                          |   5 +-
 .../polytechnic/next/NotificationChannels.kt  |   1 +
 .../next/PolytechnicApplication.kt            |   7 +
 .../next/network/request/AuthorizedRequest.kt |   3 +-
 .../next/network/request/CachedRequest.kt     |   8 -
 .../network/request/fcm/FcmUpdateCallback.kt  |  18 ++
 .../service/MyFirebaseMessagingService.kt     | 131 ++++++++-------
 .../polytechnic/next/ui/MainActivity.kt       | 143 +++++++++++-----
 .../polytechnic/next/ui/icons/AppIcons.kt     |   3 +
 .../next/ui/icons/appicons/Filled.kt          |   9 +
 .../next/ui/icons/appicons/filled/Download.kt |  59 +++++++
 .../next/ui/icons/appicons/filled/Telegram.kt |  53 ++++++
 .../polytechnic/next/ui/main/MainScreen.kt    | 154 +++++++++++++++++-
 .../next/ui/model/RemoteConfigViewModel.kt    |  89 ++++++++++
 .../polytechnic/next/utils/Extensions.kt      |   7 +
 .../next/work/FcmSetTokenWorker.kt            |  36 ++++
 .../next/work/FcmUpdateCallbackWorker.kt      |  36 ++++
 .../polytechnic/next/work/LinkUpdateWorker.kt |  20 +++
 app/src/main/proto/settings.proto             |   1 +
 app/src/main/res/drawable/download.xml        |   9 +
 app/src/main/res/drawable/telegram.xml        |   5 +
 app/src/main/res/values-ru/strings.xml        |   8 +-
 app/src/main/res/values/strings.xml           |   8 +-
 .../main/res/xml/remote_config_defaults.xml   |  27 +++
 gradle/libs.versions.toml                     |  13 +-
 gradle/wrapper/gradle-wrapper.properties      |   2 +-
 30 files changed, 728 insertions(+), 159 deletions(-)
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/network/request/fcm/FcmUpdateCallback.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/AppIcons.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/Filled.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Download.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Telegram.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/ui/model/RemoteConfigViewModel.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/utils/Extensions.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmSetTokenWorker.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmUpdateCallbackWorker.kt
 create mode 100644 app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt
 create mode 100644 app/src/main/res/drawable/download.xml
 create mode 100644 app/src/main/res/drawable/telegram.xml
 create mode 100644 app/src/main/res/xml/remote_config_defaults.xml

diff --git a/.idea/appInsightsSettings.xml b/.idea/appInsightsSettings.xml
index c6a9c7c..cb7184b 100644
--- a/.idea/appInsightsSettings.xml
+++ b/.idea/appInsightsSettings.xml
@@ -15,35 +15,8 @@
                   <option name="projectNumber" value="946974192625" />
                 </ConnectionSetting>
               </option>
-              <option name="devices">
-                <list />
-              </option>
               <option name="signal" value="SIGNAL_UNSPECIFIED" />
               <option name="timeIntervalDays" value="THIRTY_DAYS" />
-              <option name="versions">
-                <list>
-                  <VersionSetting>
-                    <option name="buildVersion" value="9" />
-                    <option name="displayName" value="1.4.0 (9)" />
-                    <option name="displayVersion" value="1.4.0" />
-                  </VersionSetting>
-                  <VersionSetting>
-                    <option name="buildVersion" value="8" />
-                    <option name="displayName" value="1.3.2 (8)" />
-                    <option name="displayVersion" value="1.3.2" />
-                  </VersionSetting>
-                  <VersionSetting>
-                    <option name="buildVersion" value="7" />
-                    <option name="displayName" value="1.3.1 (7)" />
-                    <option name="displayVersion" value="1.3.1" />
-                  </VersionSetting>
-                  <VersionSetting>
-                    <option name="buildVersion" value="6" />
-                    <option name="displayName" value="1.3.0 (6)" />
-                    <option name="displayVersion" value="1.3.0" />
-                  </VersionSetting>
-                </list>
-              </option>
               <option name="visibilityType" value="ALL" />
             </InsightsFilterSettings>
           </value>
diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index b589d56..b86273d 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="17" />
+    <bytecodeTargetLevel target="21" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 0897082..7b3006b 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -4,6 +4,7 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
+        <option name="testRunner" value="CHOOSE_PER_TEST" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
         <option name="modules">
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 2904b84..5bb575c 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -7,7 +7,7 @@
     </list>
   </component>
   <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="jbr-21" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index f8e50eb..7d01b75 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -32,8 +32,8 @@ android {
         applicationId = "ru.n08i40k.polytechnic.next"
         minSdk = 26
         targetSdk = 35
-        versionCode = 10
-        versionName = "1.5.0"
+        versionCode = 11
+        versionName = "1.6.0"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
@@ -103,6 +103,7 @@ dependencies {
     implementation(libs.firebase.analytics)
     implementation(libs.firebase.messaging)
     implementation(libs.firebase.crashlytics)
+    implementation(libs.firebase.config)
 
     // datastore
     implementation(libs.androidx.datastore)
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/NotificationChannels.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/NotificationChannels.kt
index f179277..03a8259 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/NotificationChannels.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/NotificationChannels.kt
@@ -2,4 +2,5 @@ package ru.n08i40k.polytechnic.next
 
 object NotificationChannels {
     const val SCHEDULE_UPDATE = "schedule-update"
+    const val APP_UPDATE = "app-update"
 }
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/PolytechnicApplication.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/PolytechnicApplication.kt
index 5ce1553..98372e5 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/PolytechnicApplication.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/PolytechnicApplication.kt
@@ -3,6 +3,7 @@ package ru.n08i40k.polytechnic.next
 import android.app.Application
 import dagger.hilt.android.HiltAndroidApp
 import ru.n08i40k.polytechnic.next.data.AppContainer
+import ru.n08i40k.polytechnic.next.utils.or
 import javax.inject.Inject
 
 @HiltAndroidApp
@@ -10,4 +11,10 @@ class PolytechnicApplication : Application() {
     @Suppress("unused")
     @Inject
     lateinit var container: AppContainer
+
+    fun getAppVersion(): String {
+        return applicationContext.packageManager
+            .getPackageInfo(this.packageName, 0)
+            .versionName or "1.0.0"
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/AuthorizedRequest.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/AuthorizedRequest.kt
index fc4fe43..60ae574 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/AuthorizedRequest.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/AuthorizedRequest.kt
@@ -30,7 +30,8 @@ open class AuthorizedRequest(
                         .setAccessToken("").build()
                 }
             }
-            context.profileViewModel!!.onUnauthorized()
+            if (context.profileViewModel != null)
+                context.profileViewModel!!.onUnauthorized()
         }
 
         errorListener?.onErrorResponse(it)
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/CachedRequest.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/CachedRequest.kt
index 03694a6..dfde96c 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/CachedRequest.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/CachedRequest.kt
@@ -78,8 +78,6 @@ open class CachedRequest(
         val logger = Logger.getLogger("CachedRequest")
         val repository = appContainer.networkCacheRepository
 
-        logger.info("Getting cache status...")
-
         val cacheStatusResult = tryFuture {
             ScheduleGetCacheStatus(context, it, it)
         }
@@ -87,8 +85,6 @@ open class CachedRequest(
         if (cacheStatusResult is MyResult.Success) {
             val cacheStatus = cacheStatusResult.data
 
-            logger.info("Cache status received successfully!")
-
             runBlocking {
                 repository.setUpdateDates(
                     cacheStatus.lastCacheUpdate,
@@ -98,12 +94,10 @@ open class CachedRequest(
             }
 
             if (cacheStatus.cacheUpdateRequired) {
-                logger.info("Cache update was required!")
                 val updateResult = runBlocking { updateMainPage() }
 
                 when (updateResult) {
                     is MyResult.Success -> {
-                        logger.info("Cache update was successful!")
                         runBlocking {
                             repository.setUpdateDates(
                                 updateResult.data.lastCacheUpdate,
@@ -124,12 +118,10 @@ open class CachedRequest(
 
         val cachedResponse = runBlocking { repository.get(url) }
         if (cachedResponse != null) {
-            logger.info("Found cached response!")
             listener.onResponse(cachedResponse.data)
             return
         }
 
-        logger.info("Cached response doesn't exists!")
         super.send()
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/fcm/FcmUpdateCallback.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/fcm/FcmUpdateCallback.kt
new file mode 100644
index 0000000..aefdb45
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/network/request/fcm/FcmUpdateCallback.kt
@@ -0,0 +1,18 @@
+package ru.n08i40k.polytechnic.next.network.request.fcm
+
+import android.content.Context
+import com.android.volley.Response
+import ru.n08i40k.polytechnic.next.network.request.AuthorizedRequest
+
+class FcmUpdateCallback(
+    context: Context,
+    version: String,
+    listener: Response.Listener<Unit>,
+    errorListener: Response.ErrorListener?,
+) : AuthorizedRequest(
+    context, Method.POST,
+    "fcm/update-callback/$version",
+    { listener.onResponse(Unit) },
+    errorListener,
+    true
+)
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/service/MyFirebaseMessagingService.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/service/MyFirebaseMessagingService.kt
index 72563dd..ed210a8 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/service/MyFirebaseMessagingService.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/service/MyFirebaseMessagingService.kt
@@ -1,8 +1,11 @@
 package ru.n08i40k.polytechnic.next.service
 
 import android.Manifest
-import android.content.Context
+import android.app.PendingIntent
+import android.content.Intent
 import android.content.pm.PackageManager
+import android.net.Uri
+import androidx.annotation.DrawableRes
 import androidx.core.app.ActivityCompat
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
@@ -11,19 +14,12 @@ import androidx.work.Constraints
 import androidx.work.NetworkType
 import androidx.work.OneTimeWorkRequestBuilder
 import androidx.work.WorkManager
-import androidx.work.Worker
-import androidx.work.WorkerParameters
 import androidx.work.workDataOf
 import com.google.firebase.messaging.FirebaseMessagingService
 import com.google.firebase.messaging.RemoteMessage
-import kotlinx.coroutines.flow.first
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.runBlocking
 import ru.n08i40k.polytechnic.next.NotificationChannels
-import ru.n08i40k.polytechnic.next.PolytechnicApplication
 import ru.n08i40k.polytechnic.next.R
-import ru.n08i40k.polytechnic.next.data.MyResult
-import ru.n08i40k.polytechnic.next.settings.settingsDataStore
+import ru.n08i40k.polytechnic.next.work.FcmSetTokenWorker
 import java.time.Duration
 
 class MyFirebaseMessagingService : FirebaseMessagingService() {
@@ -34,7 +30,7 @@ class MyFirebaseMessagingService : FirebaseMessagingService() {
             .setRequiredNetworkType(NetworkType.CONNECTED)
             .build()
 
-        val request = OneTimeWorkRequestBuilder<SetFcmTokenWorker>()
+        val request = OneTimeWorkRequestBuilder<FcmSetTokenWorker>()
             .setConstraints(constraints)
             .setBackoffCriteria(BackoffPolicy.LINEAR, Duration.ofMinutes(1))
             .setInputData(workDataOf("TOKEN" to token))
@@ -45,66 +41,79 @@ class MyFirebaseMessagingService : FirebaseMessagingService() {
             .enqueue(request)
     }
 
+    private fun sendNotification(
+        channel: String,
+        @DrawableRes iconId: Int,
+        title: String,
+        contentText: String,
+        priority: Int,
+        id: Any?,
+        intent: Intent? = null
+    ) {
+        val pendingIntent: PendingIntent? =
+            if (intent != null)
+                PendingIntent.getActivity(this, 0, intent.apply {
+                    flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
+                }, PendingIntent.FLAG_IMMUTABLE)
+            else
+                null
+
+        val notification = NotificationCompat
+            .Builder(applicationContext, channel)
+            .setSmallIcon(iconId)
+            .setContentTitle(title)
+            .setContentText(contentText)
+            .setPriority(priority)
+            .setAutoCancel(true)
+            .setContentIntent(pendingIntent)
+            .build()
+
+        with(NotificationManagerCompat.from(this)) {
+            if (ActivityCompat.checkSelfPermission(
+                    this@MyFirebaseMessagingService,
+                    Manifest.permission.POST_NOTIFICATIONS
+                ) != PackageManager.PERMISSION_GRANTED
+            ) {
+                return@with
+            }
+
+            notify(id.hashCode(), notification)
+        }
+    }
+
     override fun onMessageReceived(message: RemoteMessage) {
         val type = message.data["type"]
 
         when (type) {
             "schedule-update" -> {
-                val notification = NotificationCompat
-                    .Builder(applicationContext, NotificationChannels.SCHEDULE_UPDATE)
-                    .setSmallIcon(R.drawable.logo)
-                    .setContentTitle(getString(R.string.schedule_update_title))
-                    .setContentText(
-                        getString(
-                            if (message.data["replaced"] == "true")
-                                R.string.schedule_update_replaced
-                            else
-                                R.string.schedule_update_default
-                        )
-                    )
-                    .setPriority(NotificationCompat.PRIORITY_DEFAULT)
-                    .setAutoCancel(true)
-                    .build()
+                sendNotification(
+                    NotificationChannels.SCHEDULE_UPDATE,
+                    R.drawable.logo,
+                    getString(R.string.schedule_update_title),
+                    getString(
+                        if (message.data["replaced"] == "true")
+                            R.string.schedule_update_replaced
+                        else
+                            R.string.schedule_update_default
+                    ),
+                    NotificationCompat.PRIORITY_DEFAULT,
+                    message.data["etag"]
+                )
+            }
 
-                with(NotificationManagerCompat.from(this)) {
-                    if (ActivityCompat.checkSelfPermission(
-                            this@MyFirebaseMessagingService,
-                            Manifest.permission.POST_NOTIFICATIONS
-                        ) != PackageManager.PERMISSION_GRANTED
-                    ) {
-                        return@with
-                    }
-
-                    notify(message.data["etag"].hashCode(), notification)
-                }
+            "app-update" -> {
+                sendNotification(
+                    NotificationChannels.APP_UPDATE,
+                    R.drawable.logo,
+                    getString(R.string.app_update_title, message.data["version"]),
+                    getString(R.string.app_update_description),
+                    NotificationCompat.PRIORITY_DEFAULT,
+                    message.data["version"],
+                    Intent(Intent.ACTION_VIEW, Uri.parse(message.data["downloadLink"]))
+                )
             }
         }
 
         super.onMessageReceived(message)
     }
-
-    class SetFcmTokenWorker(context: Context, workerParams: WorkerParameters) :
-        Worker(context, workerParams) {
-        override fun doWork(): Result {
-            val fcmToken = inputData.getString("TOKEN") ?: return Result.failure()
-
-            val accessToken = runBlocking {
-                applicationContext.settingsDataStore.data.map { it.accessToken }.first()
-            }
-            if (accessToken.isEmpty())
-                return Result.retry()
-
-            val setResult = runBlocking {
-                (applicationContext as PolytechnicApplication)
-                    .container
-                    .profileRepository
-                    .setFcmToken(fcmToken)
-            }
-
-            return when (setResult) {
-                is MyResult.Success -> Result.success()
-                is MyResult.Failure -> Result.retry()
-            }
-        }
-    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/MainActivity.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/MainActivity.kt
index 7e03dc1..37b2e5c 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/MainActivity.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/MainActivity.kt
@@ -1,13 +1,12 @@
 package ru.n08i40k.polytechnic.next.ui
 
 import android.Manifest
-import android.annotation.SuppressLint
 import android.app.NotificationChannel
 import android.app.NotificationManager
-import android.content.Context
 import android.content.pm.PackageManager
 import android.os.Build
 import android.os.Bundle
+import android.util.Log
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
@@ -22,44 +21,76 @@ import androidx.compose.ui.Modifier
 import androidx.core.content.ContextCompat
 import androidx.core.view.WindowCompat
 import androidx.lifecycle.lifecycleScope
+import androidx.work.BackoffPolicy
+import androidx.work.Constraints
+import androidx.work.NetworkType
+import androidx.work.OneTimeWorkRequestBuilder
 import androidx.work.PeriodicWorkRequest
 import androidx.work.WorkManager
-import androidx.work.Worker
-import androidx.work.WorkerParameters
+import androidx.work.workDataOf
+import com.google.firebase.Firebase
+import com.google.firebase.remoteconfig.FirebaseRemoteConfig
+import com.google.firebase.remoteconfig.remoteConfig
+import com.google.firebase.remoteconfig.remoteConfigSettings
 import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.runBlocking
-import ru.n08i40k.polytechnic.next.NotificationChannels.SCHEDULE_UPDATE
+import ru.n08i40k.polytechnic.next.NotificationChannels
 import ru.n08i40k.polytechnic.next.PolytechnicApplication
 import ru.n08i40k.polytechnic.next.R
 import ru.n08i40k.polytechnic.next.settings.settingsDataStore
+import ru.n08i40k.polytechnic.next.work.FcmUpdateCallbackWorker
+import ru.n08i40k.polytechnic.next.work.LinkUpdateWorker
+import java.time.Duration
 import java.util.concurrent.TimeUnit
 
 @AndroidEntryPoint
 class MainActivity : ComponentActivity() {
-    @SuppressLint("ObsoleteSdkInt")
-    private fun createNotificationChannel() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            val name = getString(R.string.schedule_channel_name)
-            val description = getString(R.string.schedule_channel_description)
-            val importance = NotificationManager.IMPORTANCE_DEFAULT
-            val channel = NotificationChannel(SCHEDULE_UPDATE, name, importance)
-            channel.description = description
+    val remoteConfig: FirebaseRemoteConfig = Firebase.remoteConfig
 
-            val notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
-            notificationManager.createNotificationChannel(channel)
-        }
+    private val configSettings = remoteConfigSettings {
+        minimumFetchIntervalInSeconds = 3600
     }
 
-    private val requestPermissionLauncher = registerForActivityResult(
-        ActivityResultContracts.RequestPermission(),
+    private fun createNotificationChannel(
+        notificationManager: NotificationManager,
+        name: String,
+        description: String,
+        channelId: String
     ) {
-        if (it) {
-            createNotificationChannel()
-        }
+        val channel = NotificationChannel(channelId, name, NotificationManager.IMPORTANCE_DEFAULT)
+        channel.description = description
+
+        notificationManager.createNotificationChannel(channel)
     }
 
+    private fun createNotificationChannels() {
+        if (!hasNotificationPermission())
+            return
+
+        val notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
+
+        createNotificationChannel(
+            notificationManager,
+            getString(R.string.schedule_channel_name),
+            getString(R.string.schedule_channel_description),
+            NotificationChannels.SCHEDULE_UPDATE
+        )
+
+        createNotificationChannel(
+            notificationManager,
+            getString(R.string.app_update_channel_name),
+            getString(R.string.app_update_channel_description),
+            NotificationChannels.APP_UPDATE
+        )
+    }
+
+    private val requestPermissionLauncher =
+        registerForActivityResult(ActivityResultContracts.RequestPermission()) {
+            if (it) createNotificationChannels()
+        }
+
     private fun hasNotificationPermission(): Boolean {
         return (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU
                 || ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS)
@@ -71,42 +102,72 @@ class MainActivity : ComponentActivity() {
             requestPermissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
     }
 
-    class CacheUpdateWorker(context: Context, params: WorkerParameters) : Worker(context, params) {
-        override fun doWork(): Result {
-            runBlocking {
-                (applicationContext as PolytechnicApplication)
-                    .container
-                    .scheduleRepository
-                    .getGroup()
-            }
-            return Result.success()
-        }
-    }
 
-    private fun schedulePeriodicRequest() {
+    fun scheduleLinkUpdate(intervalInMinutes: Long) {
+        val tag = "schedule-update"
+
         val workRequest = PeriodicWorkRequest.Builder(
-            CacheUpdateWorker::class.java,
-            15, TimeUnit.MINUTES
+            LinkUpdateWorker::class.java,
+            intervalInMinutes.coerceAtLeast(15), TimeUnit.MINUTES
         )
-            .addTag("schedule-update")
+            .addTag(tag)
             .build()
 
         val workManager = WorkManager.getInstance(applicationContext)
 
-        workManager.cancelAllWorkByTag("schedule-update")
+        workManager.cancelAllWorkByTag(tag)
         workManager.enqueue(workRequest)
     }
 
+    private fun setupFirebaseConfig() {
+        remoteConfig.setConfigSettingsAsync(configSettings)
+        remoteConfig.setDefaultsAsync(R.xml.remote_config_defaults)
+
+        remoteConfig
+            .fetchAndActivate()
+            .addOnCompleteListener {
+                if (!it.isSuccessful)
+                    Log.w("RemoteConfig", "Failed to fetch and activate!")
+
+                scheduleLinkUpdate(remoteConfig.getLong("linkUpdateDelay"))
+            }
+    }
+
+    private fun handleUpdate() {
+        lifecycleScope.launch {
+            val appVersion = (applicationContext as PolytechnicApplication).getAppVersion()
+
+            if (settingsDataStore.data.map { it.version }.first() != appVersion) {
+                settingsDataStore.updateData { it.toBuilder().setVersion(appVersion).build() }
+
+                val constraints = Constraints.Builder()
+                    .setRequiredNetworkType(NetworkType.CONNECTED)
+                    .build()
+
+                val request = OneTimeWorkRequestBuilder<FcmUpdateCallbackWorker>()
+                    .setConstraints(constraints)
+                    .setBackoffCriteria(BackoffPolicy.LINEAR, Duration.ofMinutes(1))
+                    .setInputData(workDataOf("VERSION" to appVersion))
+                    .build()
+
+                WorkManager
+                    .getInstance(this@MainActivity)
+                    .enqueue(request)
+            }
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         enableEdgeToEdge()
         WindowCompat.setDecorFitsSystemWindows(window, false)
         super.onCreate(savedInstanceState)
 
-        schedulePeriodicRequest()
         askNotificationPermission()
+        createNotificationChannels()
 
-        if (hasNotificationPermission())
-            createNotificationChannel()
+        setupFirebaseConfig()
+
+        handleUpdate()
 
         setContent {
             Box(Modifier.windowInsetsPadding(WindowInsets.safeContent.only(WindowInsetsSides.Top))) {
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/AppIcons.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/AppIcons.kt
new file mode 100644
index 0000000..9e1ceaa
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/AppIcons.kt
@@ -0,0 +1,3 @@
+package ru.n08i40k.polytechnic.next.ui.icons
+
+object AppIcons
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/Filled.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/Filled.kt
new file mode 100644
index 0000000..cda0c02
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/Filled.kt
@@ -0,0 +1,9 @@
+package ru.n08i40k.polytechnic.next.ui.icons.appicons
+
+import ru.n08i40k.polytechnic.next.ui.icons.AppIcons
+
+object FilledGroup
+
+@Suppress("UnusedReceiverParameter")
+val AppIcons.Filled: FilledGroup
+  get() = FilledGroup
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Download.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Download.kt
new file mode 100644
index 0000000..fbbfe5b
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Download.kt
@@ -0,0 +1,59 @@
+package ru.n08i40k.polytechnic.next.ui.icons.appicons.filled
+
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.PathFillType.Companion.NonZero
+import androidx.compose.ui.graphics.SolidColor
+import androidx.compose.ui.graphics.StrokeCap.Companion.Round
+import androidx.compose.ui.graphics.StrokeJoin
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.graphics.vector.ImageVector.Builder
+import androidx.compose.ui.graphics.vector.path
+import androidx.compose.ui.unit.dp
+import ru.n08i40k.polytechnic.next.ui.icons.appicons.FilledGroup
+
+@Suppress("UnusedReceiverParameter")
+val FilledGroup.Download: ImageVector
+    get() {
+        if (_download != null) {
+            return _download!!
+        }
+        _download = Builder(
+            name = "Download", defaultWidth = 24.0.dp, defaultHeight = 24.0.dp,
+            viewportWidth = 24.0f, viewportHeight = 24.0f
+        ).apply {
+            path(
+                fill = SolidColor(Color(0x00000000)), stroke = SolidColor(Color(0xFF000000)),
+                strokeLineWidth = 2.0f, strokeLineCap = Round, strokeLineJoin =
+                StrokeJoin.Companion.Round, strokeLineMiter = 4.0f, pathFillType = NonZero
+            ) {
+                moveTo(3.0f, 12.3f)
+                verticalLineToRelative(7.0f)
+                arcToRelative(2.0f, 2.0f, 0.0f, false, false, 2.0f, 2.0f)
+                horizontalLineTo(19.0f)
+                arcToRelative(2.0f, 2.0f, 0.0f, false, false, 2.0f, -2.0f)
+                verticalLineToRelative(-7.0f)
+            }
+            path(
+                fill = SolidColor(Color(0x00000000)), stroke = SolidColor(Color(0xFF000000)),
+                strokeLineWidth = 2.0f, strokeLineCap = Round, strokeLineJoin =
+                StrokeJoin.Companion.Round, strokeLineMiter = 4.0f, pathFillType = NonZero
+            ) {
+                moveTo(7.9f, 12.3f)
+                lineToRelative(4.1f, 4.0f)
+                lineToRelative(4.1f, -4.0f)
+            }
+            path(
+                fill = SolidColor(Color(0x00000000)), stroke = SolidColor(Color(0xFF000000)),
+                strokeLineWidth = 2.0f, strokeLineCap = Round, strokeLineJoin =
+                StrokeJoin.Companion.Round, strokeLineMiter = 4.0f, pathFillType = NonZero
+            ) {
+                moveTo(12.0f, 2.7f)
+                lineTo(12.0f, 14.2f)
+            }
+        }
+            .build()
+        return _download!!
+    }
+
+@Suppress("ObjectPropertyName")
+private var _download: ImageVector? = null
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Telegram.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Telegram.kt
new file mode 100644
index 0000000..5490f6f
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/icons/appicons/filled/Telegram.kt
@@ -0,0 +1,53 @@
+package ru.n08i40k.polytechnic.next.ui.icons.appicons.filled
+
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.PathFillType.Companion.NonZero
+import androidx.compose.ui.graphics.SolidColor
+import androidx.compose.ui.graphics.StrokeCap.Companion.Butt
+import androidx.compose.ui.graphics.StrokeJoin.Companion.Miter
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.graphics.vector.ImageVector.Builder
+import androidx.compose.ui.graphics.vector.path
+import androidx.compose.ui.unit.dp
+import ru.n08i40k.polytechnic.next.ui.icons.appicons.FilledGroup
+
+@Suppress("UnusedReceiverParameter")
+val FilledGroup.Telegram: ImageVector
+    get() {
+        if (_telegram != null) {
+            return _telegram!!
+        }
+        _telegram = Builder(
+            name = "Telegram", defaultWidth = 24.0.dp, defaultHeight = 24.0.dp,
+            viewportWidth = 24.0f, viewportHeight = 24.0f
+        ).apply {
+            path(
+                fill = SolidColor(Color(0xFF000000)), stroke = null, strokeLineWidth = 0.0f,
+                strokeLineCap = Butt, strokeLineJoin = Miter, strokeLineMiter = 4.0f,
+                pathFillType = NonZero
+            ) {
+                moveToRelative(20.665f, 3.717f)
+                lineToRelative(-17.73f, 6.837f)
+                curveToRelative(-1.21f, 0.486f, -1.203f, 1.161f, -0.222f, 1.462f)
+                lineToRelative(4.552f, 1.42f)
+                lineToRelative(10.532f, -6.645f)
+                curveToRelative(0.498f, -0.303f, 0.953f, -0.14f, 0.579f, 0.192f)
+                lineToRelative(-8.533f, 7.701f)
+                horizontalLineToRelative(-0.002f)
+                lineToRelative(0.002f, 0.001f)
+                lineToRelative(-0.314f, 4.692f)
+                curveToRelative(0.46f, 0.0f, 0.663f, -0.211f, 0.921f, -0.46f)
+                lineToRelative(2.211f, -2.15f)
+                lineToRelative(4.599f, 3.397f)
+                curveToRelative(0.848f, 0.467f, 1.457f, 0.227f, 1.668f, -0.785f)
+                lineToRelative(3.019f, -14.228f)
+                curveToRelative(0.309f, -1.239f, -0.473f, -1.8f, -1.282f, -1.434f)
+                close()
+            }
+        }
+            .build()
+        return _telegram!!
+    }
+
+@Suppress("ObjectPropertyName")
+private var _telegram: ImageVector? = null
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt
index 8ae780d..5881a17 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt
@@ -1,25 +1,52 @@
 package ru.n08i40k.polytechnic.next.ui.main
 
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
 import androidx.activity.ComponentActivity
 import androidx.compose.animation.core.FastOutSlowInEasing
 import androidx.compose.animation.core.LinearOutSlowInEasing
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.slideIn
 import androidx.compose.animation.slideOut
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.wrapContentWidth
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material3.Badge
+import androidx.compose.material3.BadgedBox
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.NavigationBar
 import androidx.compose.material3.NavigationBarItem
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.IntOffset
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat.startActivity
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -32,13 +59,21 @@ import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.runBlocking
 import ru.n08i40k.polytechnic.next.MainViewModel
+import ru.n08i40k.polytechnic.next.PolytechnicApplication
+import ru.n08i40k.polytechnic.next.R
 import ru.n08i40k.polytechnic.next.model.UserRole
 import ru.n08i40k.polytechnic.next.settings.settingsDataStore
+import ru.n08i40k.polytechnic.next.ui.MainActivity
+import ru.n08i40k.polytechnic.next.ui.icons.AppIcons
+import ru.n08i40k.polytechnic.next.ui.icons.appicons.Filled
+import ru.n08i40k.polytechnic.next.ui.icons.appicons.filled.Download
+import ru.n08i40k.polytechnic.next.ui.icons.appicons.filled.Telegram
 import ru.n08i40k.polytechnic.next.ui.main.profile.ProfileScreen
 import ru.n08i40k.polytechnic.next.ui.main.replacer.ReplacerScreen
 import ru.n08i40k.polytechnic.next.ui.main.schedule.ScheduleScreen
 import ru.n08i40k.polytechnic.next.ui.model.ProfileUiState
 import ru.n08i40k.polytechnic.next.ui.model.ProfileViewModel
+import ru.n08i40k.polytechnic.next.ui.model.RemoteConfigViewModel
 import ru.n08i40k.polytechnic.next.ui.model.ScheduleReplacerViewModel
 import ru.n08i40k.polytechnic.next.ui.model.ScheduleViewModel
 import ru.n08i40k.polytechnic.next.ui.model.profileViewModel
@@ -91,6 +126,88 @@ private fun NavHostContainer(
         })
 }
 
+private fun openLink(context: Context, link: String) {
+    startActivity(context, Intent(Intent.ACTION_VIEW, Uri.parse(link)), null)
+}
+
+@Composable
+private fun LinkButton(
+    text: String,
+    icon: ImageVector,
+    link: String,
+    enabled: Boolean = true,
+    badged: Boolean = false,
+) {
+    val context = LocalContext.current
+
+    TextButton(
+        modifier = Modifier.fillMaxWidth(),
+        onClick = { openLink(context, link) },
+        enabled = enabled,
+    ) {
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            BadgedBox(badge = { if (badged) Badge() }) {
+                Icon(imageVector = icon, contentDescription = text)
+            }
+            Spacer(Modifier.width(5.dp))
+            Text(text)
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun TopNavBar(
+    remoteConfigViewModel: RemoteConfigViewModel
+) {
+    var dropdownExpanded by remember { mutableStateOf(false) }
+    val remoteConfigUiState by remoteConfigViewModel.uiState.collectAsStateWithLifecycle()
+
+    val packageVersion =
+        (LocalContext.current.applicationContext as PolytechnicApplication).getAppVersion()
+    val updateAvailable = remoteConfigUiState.currVersion != packageVersion
+
+    TopAppBar(
+        title = {
+            Text(
+                modifier = Modifier.fillMaxWidth(),
+                text = stringResource(R.string.app_name),
+                style = MaterialTheme.typography.titleLarge,
+                textAlign = TextAlign.Center
+            )
+        },
+        actions = {
+            IconButton(onClick = { dropdownExpanded = true }) {
+                BadgedBox(badge = { if (updateAvailable) Badge() }) {
+                    Icon(imageVector = Icons.Filled.Menu, contentDescription = "TopAppBar Menu")
+                }
+            }
+            DropdownMenu(
+                expanded = dropdownExpanded,
+                onDismissRequest = { dropdownExpanded = false }
+            ) {
+                Column(modifier = Modifier.wrapContentWidth()) {
+                    LinkButton(
+                        text = stringResource(R.string.download_update),
+                        icon = AppIcons.Filled.Download,
+                        link = remoteConfigUiState.downloadLink,
+                        enabled = updateAvailable,
+                        badged = updateAvailable
+                    )
+                    LinkButton(
+                        text = stringResource(R.string.telegram_channel),
+                        icon = AppIcons.Filled.Telegram,
+                        link = remoteConfigUiState.telegramLink,
+                    )
+                }
+            }
+        }
+    )
+}
+
 @Composable
 private fun BottomNavBar(navController: NavHostController, isAdmin: Boolean) {
     NavigationBar {
@@ -131,26 +248,49 @@ fun MainScreen(
         if (accessToken.isEmpty()) appNavController.navigate("auth")
     }
 
-    val scheduleViewModel =
-        hiltViewModel<ScheduleViewModel>(LocalContext.current as ComponentActivity)
-
-    LocalContext.current.profileViewModel =
+    // profile view model
+    val profileViewModel: ProfileViewModel =
         viewModel(
             factory = ProfileViewModel.provideFactory(
                 profileRepository = mainViewModel.appContainer.profileRepository,
                 onUnauthorized = { appNavController.navigate("auth") })
         )
+    LocalContext.current.profileViewModel = profileViewModel
 
-    val profileUiState by LocalContext.current.profileViewModel!!.uiState.collectAsStateWithLifecycle()
-    val isAdmin = (profileUiState is ProfileUiState.HasProfile) &&
-            (profileUiState as ProfileUiState.HasProfile).profile.role == UserRole.ADMIN
+    // remote config view model
+    val remoteConfigViewModel: RemoteConfigViewModel =
+        viewModel(
+            factory = RemoteConfigViewModel.provideFactory(
+                appContext = LocalContext.current,
+                remoteConfig = (LocalContext.current as MainActivity).remoteConfig
+            )
+        )
+
+    // schedule view model
+    val scheduleViewModel =
+        hiltViewModel<ScheduleViewModel>(LocalContext.current as ComponentActivity)
+
+    // schedule replacer view model
+    val profileUiState by profileViewModel.uiState.collectAsStateWithLifecycle()
+
+    val isAdmin = when (profileUiState) {
+        is ProfileUiState.NoProfile -> false
+        is ProfileUiState.HasProfile -> {
+            val profile = (profileUiState as ProfileUiState.HasProfile).profile
+
+            profile.role == UserRole.ADMIN
+        }
+    }
 
     val scheduleReplacerViewModel: ScheduleReplacerViewModel? =
         if (isAdmin) hiltViewModel(LocalContext.current as ComponentActivity)
         else null
 
+    // nav controller
+
     val navController = rememberNavController()
     Scaffold(
+        topBar = { TopNavBar(remoteConfigViewModel) },
         bottomBar = { BottomNavBar(navController, isAdmin) }
     ) { paddingValues ->
         NavHostContainer(
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/model/RemoteConfigViewModel.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/model/RemoteConfigViewModel.kt
new file mode 100644
index 0000000..22d3eef
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/model/RemoteConfigViewModel.kt
@@ -0,0 +1,89 @@
+package ru.n08i40k.polytechnic.next.ui.model
+
+import android.content.Context
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import com.google.firebase.remoteconfig.ConfigUpdate
+import com.google.firebase.remoteconfig.ConfigUpdateListener
+import com.google.firebase.remoteconfig.FirebaseRemoteConfig
+import com.google.firebase.remoteconfig.FirebaseRemoteConfigException
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.flow.update
+import ru.n08i40k.polytechnic.next.ui.MainActivity
+import java.util.logging.Logger
+
+data class RemoteConfigUiState(
+    val minVersion: String,
+    val currVersion: String,
+    val serverVersion: String,
+    val downloadLink: String,
+    val telegramLink: String,
+    val linkUpdateDelay: Long,
+)
+
+
+class RemoteConfigViewModel(
+    private val appContext: Context,
+    private val remoteConfig: FirebaseRemoteConfig,
+) : ViewModel() {
+    private val viewModelState = MutableStateFlow(
+        RemoteConfigUiState(
+            minVersion = remoteConfig.getString("minVersion"),
+            currVersion = remoteConfig.getString("currVersion"),
+            downloadLink = remoteConfig.getString("downloadLink"),
+            telegramLink = remoteConfig.getString("telegramLink"),
+            serverVersion = remoteConfig.getString("serverVersion"),
+            linkUpdateDelay = remoteConfig.getLong("linkUpdateDelay"),
+        )
+    )
+
+    val uiState = viewModelState
+        .stateIn(viewModelScope, SharingStarted.Eagerly, viewModelState.value)
+
+    init {
+        (appContext as MainActivity)
+            .scheduleLinkUpdate(viewModelState.value.linkUpdateDelay)
+
+        remoteConfig.addOnConfigUpdateListener(object : ConfigUpdateListener {
+            override fun onUpdate(configUpdate: ConfigUpdate) {
+                remoteConfig.activate().addOnCompleteListener {
+                    viewModelState.update {
+                        it.copy(
+                            minVersion = remoteConfig.getString("minVersion"),
+                            currVersion = remoteConfig.getString("currVersion"),
+                            downloadLink = remoteConfig.getString("downloadLink"),
+                            telegramLink = remoteConfig.getString("telegramLink"),
+                            serverVersion = remoteConfig.getString("serverVersion"),
+                            linkUpdateDelay = remoteConfig.getLong("linkUpdateDelay"),
+                        )
+                    }
+
+                    appContext.scheduleLinkUpdate(viewModelState.value.linkUpdateDelay)
+                }
+            }
+
+            override fun onError(error: FirebaseRemoteConfigException) {
+                Logger.getLogger("RemoteConfigViewModel")
+                    .severe("Failed to fetch RemoteConfig update!")
+            }
+        })
+    }
+
+    companion object {
+        fun provideFactory(
+            appContext: Context,
+            remoteConfig: FirebaseRemoteConfig,
+        ): ViewModelProvider.Factory =
+            object : ViewModelProvider.Factory {
+                override fun <T : ViewModel> create(modelClass: Class<T>): T {
+                    @Suppress("UNCHECKED_CAST") return RemoteConfigViewModel(
+                        appContext,
+                        remoteConfig,
+                    ) as T
+                }
+            }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/utils/Extensions.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/utils/Extensions.kt
new file mode 100644
index 0000000..2208efa
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/utils/Extensions.kt
@@ -0,0 +1,7 @@
+package ru.n08i40k.polytechnic.next.utils
+
+infix fun <T> T?.or(data: T): T {
+    if (this == null)
+        return data
+    return this
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmSetTokenWorker.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmSetTokenWorker.kt
new file mode 100644
index 0000000..6d108e7
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmSetTokenWorker.kt
@@ -0,0 +1,36 @@
+package ru.n08i40k.polytechnic.next.work
+
+import android.content.Context
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.runBlocking
+import ru.n08i40k.polytechnic.next.PolytechnicApplication
+import ru.n08i40k.polytechnic.next.data.MyResult
+import ru.n08i40k.polytechnic.next.settings.settingsDataStore
+
+class FcmSetTokenWorker(context: Context, workerParams: WorkerParameters) :
+    Worker(context, workerParams) {
+    override fun doWork(): Result {
+        val fcmToken = inputData.getString("TOKEN") ?: return Result.failure()
+
+        val accessToken = runBlocking {
+            applicationContext.settingsDataStore.data.map { it.accessToken }.first()
+        }
+        if (accessToken.isEmpty())
+            return Result.retry()
+
+        val setResult = runBlocking {
+            (applicationContext as PolytechnicApplication)
+                .container
+                .profileRepository
+                .setFcmToken(fcmToken)
+        }
+
+        return when (setResult) {
+            is MyResult.Success -> Result.success()
+            is MyResult.Failure -> Result.retry()
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmUpdateCallbackWorker.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmUpdateCallbackWorker.kt
new file mode 100644
index 0000000..dd75e79
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/work/FcmUpdateCallbackWorker.kt
@@ -0,0 +1,36 @@
+package ru.n08i40k.polytechnic.next.work
+
+import android.content.Context
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.runBlocking
+import ru.n08i40k.polytechnic.next.data.MyResult
+import ru.n08i40k.polytechnic.next.network.request.fcm.FcmUpdateCallback
+import ru.n08i40k.polytechnic.next.network.tryFuture
+import ru.n08i40k.polytechnic.next.settings.settingsDataStore
+
+class FcmUpdateCallbackWorker(context: Context, workerParams: WorkerParameters) :
+    Worker(context, workerParams) {
+    override fun doWork(): Result {
+        val version = inputData.getString("VERSION") ?: return Result.failure()
+
+        val accessToken = runBlocking {
+            applicationContext.settingsDataStore.data.map { it.accessToken }.first()
+        }
+        if (accessToken.isEmpty())
+            return Result.retry()
+
+        val result = runBlocking {
+            tryFuture {
+                FcmUpdateCallback(this@FcmUpdateCallbackWorker.applicationContext, version, it, it)
+            }
+        }
+
+        return when (result) {
+            is MyResult.Success -> Result.success()
+            is MyResult.Failure -> Result.retry()
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt
new file mode 100644
index 0000000..bad1fb4
--- /dev/null
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt
@@ -0,0 +1,20 @@
+package ru.n08i40k.polytechnic.next.work
+
+import android.content.Context
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+import kotlinx.coroutines.runBlocking
+import ru.n08i40k.polytechnic.next.PolytechnicApplication
+
+class LinkUpdateWorker(context: Context, params: WorkerParameters) :
+    Worker(context, params) {
+    override fun doWork(): Result {
+        runBlocking {
+            (applicationContext as PolytechnicApplication)
+                .container
+                .scheduleRepository
+                .getGroup()
+        }
+        return Result.success()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/proto/settings.proto b/app/src/main/proto/settings.proto
index 3e369ce..d1d4bf7 100644
--- a/app/src/main/proto/settings.proto
+++ b/app/src/main/proto/settings.proto
@@ -19,4 +19,5 @@ message Settings {
   string group = 3;
   map<string, CachedResponse> cache_storage = 4;
   UpdateDates update_dates = 5;
+  string version = 6;
 }
\ No newline at end of file
diff --git a/app/src/main/res/drawable/download.xml b/app/src/main/res/drawable/download.xml
new file mode 100644
index 0000000..0d9bd27
--- /dev/null
+++ b/app/src/main/res/drawable/download.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="#00000000" android:pathData="M3,12.3v7a2,2 0,0 0,2 2H19a2,2 0,0 0,2 -2v-7" android:strokeColor="#000000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2"/>
+      
+    <path android:fillColor="#00000000" android:pathData="M7.9,12.3l4.1,4l4.1,-4" android:strokeColor="#000000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2"/>
+      
+    <path android:fillColor="#00000000" android:pathData="M12,2.7L12,14.2" android:strokeColor="#000000" android:strokeLineCap="round" android:strokeLineJoin="round" android:strokeWidth="2"/>
+    
+</vector>
diff --git a/app/src/main/res/drawable/telegram.xml b/app/src/main/res/drawable/telegram.xml
new file mode 100644
index 0000000..c773fa8
--- /dev/null
+++ b/app/src/main/res/drawable/telegram.xml
@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="#000000" android:pathData="m20.665,3.717 l-17.73,6.837c-1.21,0.486 -1.203,1.161 -0.222,1.462l4.552,1.42 10.532,-6.645c0.498,-0.303 0.953,-0.14 0.579,0.192l-8.533,7.701h-0.002l0.002,0.001 -0.314,4.692c0.46,0 0.663,-0.211 0.921,-0.46l2.211,-2.15 4.599,3.397c0.848,0.467 1.457,0.227 1.668,-0.785l3.019,-14.228c0.309,-1.239 -0.473,-1.8 -1.282,-1.434z"/>
+    
+</vector>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index 0b2ecfb..946186d 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -42,7 +42,13 @@
     <string name="set_replacer">Загрузить новое расписание</string>
     <string name="schedule_channel_name">Обновления расписания</string>
     <string name="schedule_channel_description">Информирует об обновлении расписания</string>
-    <string name="schedule_update_title">Расписание обновлено.</string>
+    <string name="schedule_update_title">Расписание обновлено!</string>
     <string name="schedule_update_replaced">Расписание было обновлено Администратором.</string>
     <string name="schedule_update_default">Расписание было обновлено на сайте политехникума.</string>
+    <string name="download_update">Скачать обновление</string>
+    <string name="telegram_channel">Телеграм канал</string>
+    <string name="app_update_channel_name">Обновление приложения</string>
+    <string name="app_update_channel_description">Информирует о выходе новой версии этого приложения</string>
+    <string name="app_update_title">Вышла версия %1$s!</string>
+    <string name="app_update_description">Нажмите что бы загрузить обновление.</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index fe10ae3..dcff827 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -42,7 +42,13 @@
     <string name="set_replacer">Set new</string>
     <string name="schedule_channel_name">Schedule update</string>
     <string name="schedule_channel_description">Inform when schedule has been updated</string>
-    <string name="schedule_update_title">Schedule has been updated.</string>
+    <string name="schedule_update_title">Schedule has been updated!</string>
     <string name="schedule_update_replaced">Schedule was updated by Administrator.</string>
     <string name="schedule_update_default">Schedule was updated on polytechnic website.</string>
+    <string name="download_update">Download update</string>
+    <string name="telegram_channel">Telegram channel</string>
+    <string name="app_update_channel_name">Application update</string>
+    <string name="app_update_channel_description">Inform about new version of this app has been released</string>
+    <string name="app_update_title">Version %1$s released!</string>
+    <string name="app_update_description">Click to download new version.</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/xml/remote_config_defaults.xml b/app/src/main/res/xml/remote_config_defaults.xml
new file mode 100644
index 0000000..33683e0
--- /dev/null
+++ b/app/src/main/res/xml/remote_config_defaults.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<defaults>
+  <entry>
+    <key>linkUpdateDelay</key>
+    <value>15</value>
+  </entry>
+  <entry>
+    <key>minVersion</key>
+    <value>1.3.0</value>
+  </entry>
+  <entry>
+    <key>currVersion</key>
+    <value>1.5.0</value>
+  </entry>
+  <entry>
+    <key>downloadLink</key>
+    <value>https://t.me/polytechnic_next/16</value>
+  </entry>
+  <entry>
+    <key>telegramLink</key>
+    <value>https://t.me/polytechnic_next</value>
+  </entry>
+  <entry>
+    <key>serverVersion</key>
+    <value>1.3.0</value>
+  </entry>
+</defaults>
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index ad36080..1f3678b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 accompanistSwiperefresh = "0.36.0"
-agp = "8.6.1"
+agp = "8.7.0"
 firebaseBom = "33.4.0"
 hiltAndroid = "2.52"
 hiltAndroidCompiler = "2.52"
@@ -18,9 +18,7 @@ protobufLite = "3.0.1"
 volley = "1.2.1"
 datastore = "1.1.1"
 navigationCompose = "2.8.2"
-firebaseCrashlytics = "19.2.0"
 googleFirebaseCrashlytics = "3.0.2"
-firebaseMessaging = "24.0.2"
 workRuntime = "2.9.1"
 
 [libraries]
@@ -29,8 +27,6 @@ androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref =
 androidx-hilt-navigation-compose = { module = "androidx.hilt:hilt-navigation-compose", version.ref = "hiltNavigationCompose" }
 androidx-work-runtime = { module = "androidx.work:work-runtime", version.ref = "workRuntime" }
 androidx-work-runtime-ktx = { module = "androidx.work:work-runtime-ktx", version.ref = "workRuntime" }
-firebase-analytics = { module = "com.google.firebase:firebase-analytics" }
-firebase-bom = { module = "com.google.firebase:firebase-bom", version.ref = "firebaseBom" }
 hilt-android-compiler = { module = "com.google.dagger:hilt-android-compiler", version.ref = "hiltAndroidCompiler" }
 hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hiltAndroid" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }
@@ -51,8 +47,11 @@ kotlinx-serialization-json = { module = "org.jetbrains.kotlinx:kotlinx-serializa
 protobuf-lite = { module = "com.google.protobuf:protobuf-lite", version.ref = "protobufLite" }
 volley = { group = "com.android.volley", name = "volley", version.ref = "volley" }
 androidx-navigation-compose = { group = "androidx.navigation", name = "navigation-compose", version.ref = "navigationCompose" }
-firebase-crashlytics = { group = "com.google.firebase", name = "firebase-crashlytics", version.ref = "firebaseCrashlytics" }
-firebase-messaging = { group = "com.google.firebase", name = "firebase-messaging", version.ref = "firebaseMessaging" }
+firebase-bom = { module = "com.google.firebase:firebase-bom", version.ref = "firebaseBom" }
+firebase-analytics = { module = "com.google.firebase:firebase-analytics" }
+firebase-crashlytics = { group = "com.google.firebase", name = "firebase-crashlytics" }
+firebase-messaging = { group = "com.google.firebase", name = "firebase-messaging" }
+firebase-config = { group = "com.google.firebase", name = "firebase-config" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 1a34ebf..e40c8b5 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Sat Sep 07 22:06:56 GMT+04:00 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists