refactor(app): refactor update logic to make core logic more reusable by moving it into the core.feature.update package

app/src/main/java/hu/bbara/purefin/ui/screen/AppScreen.kt

@@ -5,16 +5,16 @@ import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.animation.togetherWith
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.SnackbarHostState
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberCoroutineScope
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.LifecycleResumeEffect
 import androidx.navigation3.runtime.NavBackStack
@@ -24,17 +24,18 @@ import androidx.navigation3.runtime.rememberNavBackStack
 import androidx.navigation3.runtime.rememberSaveableStateHolderNavEntryDecorator
 import androidx.navigation3.ui.NavDisplay
 import hu.bbara.purefin.feature.browse.home.AppViewModel
+import hu.bbara.purefin.feature.update.AppUpdateInfo
+import hu.bbara.purefin.feature.update.AppUpdateViewModel
 import hu.bbara.purefin.navigation.LocalNavigationManager
-import hu.bbara.purefin.update.AppUpdateInstaller
 import hu.bbara.purefin.ui.screen.download.DownloadsScreen
 import hu.bbara.purefin.ui.screen.home.HomeScreen
 import hu.bbara.purefin.ui.screen.libraries.LibrariesScreen
-import kotlinx.coroutines.launch
 import kotlinx.serialization.Serializable
 
 @Composable
 fun AppScreen(
     viewModel: AppViewModel = hiltViewModel(),
+    updateViewModel: AppUpdateViewModel = hiltViewModel(),
     modifier: Modifier = Modifier
 ) {
     val libraries by viewModel.libraries.collectAsState()
@@ -43,12 +44,10 @@ fun AppScreen(
     val continueWatching by viewModel.continueWatching.collectAsState()
     val nextUp by viewModel.nextUp.collectAsState()
     val isRefreshing by viewModel.isRefreshing.collectAsState()
+    val isCheckingForUpdates by updateViewModel.isCheckingForUpdates.collectAsState()
+    val availableUpdate by updateViewModel.availableUpdate.collectAsState()
     val navigationManager = LocalNavigationManager.current
-    val context = LocalContext.current
-    val coroutineScope = rememberCoroutineScope()
     val snackbarHostState = remember { SnackbarHostState() }
-    val appUpdateInstaller = remember(context) { AppUpdateInstaller(context) }
-    var isCheckingForUpdates by remember { mutableStateOf(false) }
 
     @Suppress("UNCHECKED_CAST")
     val backStack = rememberNavBackStack(AppTabRoute.Home) as NavBackStack<AppTabRoute>
@@ -60,6 +59,12 @@ fun AppScreen(
         onPauseOrDispose { }
     }
 
+    LaunchedEffect(updateViewModel) {
+        updateViewModel.snackbarMessages.collect { message ->
+            snackbarHostState.showSnackbar(message)
+        }
+    }
+
     val onTabSelected = remember(backStack) {
         { selectedIndex: Int ->
             val route = selectedIndex.toAppTabRoute()
@@ -68,21 +73,6 @@ fun AppScreen(
             }
         }
     }
-    val onCheckForUpdates = {
-        if (!isCheckingForUpdates) {
-            coroutineScope.launch {
-                isCheckingForUpdates = true
-                val message = try {
-                    appUpdateInstaller.checkForUpdateAndInstall()
-                } catch (e: Exception) {
-                    e.message ?: "Update check failed"
-                } finally {
-                    isCheckingForUpdates = false
-                }
-                snackbarHostState.showSnackbar(message)
-            }
-        }
-    }
 
     val tabEntryProvider = entryProvider {
         entry<AppTabRoute.Home>(metadata = appTabMetadata(AppTabRoute.Home)) {
@@ -102,7 +92,7 @@ fun AppScreen(
                     )
                 },
                 onProfileClick = {},
-                onCheckForUpdates = onCheckForUpdates,
+                onCheckForUpdates = updateViewModel::checkForUpdates,
                 isCheckingForUpdates = isCheckingForUpdates,
                 onSettingsClick = {},
                 onLogoutClick = viewModel::logout,
@@ -150,6 +140,14 @@ fun AppScreen(
         entryProvider = tabEntryProvider,
         modifier = modifier.fillMaxSize()
     )
+
+    availableUpdate?.let { update ->
+        UpdateAvailableDialog(
+            update = update,
+            onAccept = updateViewModel::acceptUpdate,
+            onDecline = updateViewModel::declineUpdate
+        )
+    }
 }
 
 @Serializable
@@ -183,4 +181,35 @@ private fun appTabMetadata(route: AppTabRoute): Map<String, Any> =
 private fun Map<String, Any>.appTabIndex(): Int =
     this[APP_TAB_INDEX_METADATA] as? Int ?: 0
 
+@Composable
+private fun UpdateAvailableDialog(
+    update: AppUpdateInfo,
+    onAccept: () -> Unit,
+    onDecline: () -> Unit
+) {
+    val versionLabel = update.versionName?.takeIf { it.isNotBlank() } ?: update.versionCode.toString()
+    val releaseNotes = update.releaseNotes?.takeIf { it.isNotBlank() }
+    val updateText = if (releaseNotes == null) {
+        "Purefin $versionLabel is available.\n\nVersion code: ${update.versionCode}"
+    } else {
+        "Purefin $versionLabel is available.\n\nVersion code: ${update.versionCode}\n\n$releaseNotes"
+    }
+
+    AlertDialog(
+        onDismissRequest = onDecline,
+        title = { Text("Update available") },
+        text = { Text(updateText) },
+        confirmButton = {
+            TextButton(onClick = onAccept) {
+                Text("Install")
+            }
+        },
+        dismissButton = {
+            TextButton(onClick = onDecline) {
+                Text("Not now")
+            }
+        }
+    )
+}
+
 private const val APP_TAB_INDEX_METADATA = "app_tab_index"

app/src/main/java/hu/bbara/purefin/update/AppUpdateInstaller.kt

@@ -10,67 +10,44 @@ import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Build
 import android.provider.Settings
-import hu.bbara.purefin.BuildConfig
+import dagger.hilt.android.qualifiers.ApplicationContext
+import hu.bbara.purefin.feature.update.AppUpdateInfo
+import hu.bbara.purefin.feature.update.AppUpdateInstaller
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import kotlinx.serialization.Serializable
-import kotlinx.serialization.json.Json
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import okhttp3.OkHttpClient
 import okhttp3.Request
 import java.io.File
+import javax.inject.Inject
 
-class AppUpdateInstaller(
-    context: Context,
-    private val client: OkHttpClient = OkHttpClient()
-) {
+class AndroidAppUpdateInstaller @Inject constructor(
+    @ApplicationContext context: Context
+) : AppUpdateInstaller {
     private val appContext = context.applicationContext
-    private val json = Json { ignoreUnknownKeys = true }
-
-    suspend fun checkForUpdateAndInstall(): String {
-        val manifestUrl = "http://purefin.t.bbara.hu/app/update.json"
-        if (manifestUrl.isBlank()) {
-            return "Update manifest URL not configured"
-        }
-
-        val manifest = withContext(Dispatchers.IO) { fetchManifest(manifestUrl) }
-        if (manifest.versionCode <= BuildConfig.VERSION_CODE.toLong()) {
-            return "Purefin is up to date"
-        }
+    private val client = OkHttpClient()
 
+    override suspend fun installUpdate(update: AppUpdateInfo): String {
         if (!appContext.packageManager.canRequestPackageInstalls()) {
             openInstallPermissionSettings()
             return "Allow app installs, then check again"
         }
 
         val apkFile = withContext(Dispatchers.IO) {
-            downloadApk(manifestUrl, manifest)
-                .also { validateApk(it, manifest.versionCode) }
+            downloadApk(update)
+                .also { validateApk(it, update.versionCode) }
         }
 
         withContext(Dispatchers.IO) {
-            commitInstallSession(apkFile, manifest.versionCode)
+            commitInstallSession(apkFile, update.versionCode)
         }
 
-        val versionLabel = manifest.versionName?.takeIf { it.isNotBlank() } ?: manifest.versionCode.toString()
+        val versionLabel = update.versionName?.takeIf { it.isNotBlank() } ?: update.versionCode.toString()
         return "Downloaded Purefin $versionLabel"
     }
 
-    private fun fetchManifest(manifestUrl: String): AppUpdateManifest {
-        val request = Request.Builder()
-            .url(manifestUrl)
-            .build()
-        client.newCall(request).execute().use { response ->
-            if (!response.isSuccessful) {
-                throw IllegalStateException("Update check failed: HTTP ${response.code}")
-            }
-            val body = response.body?.string() ?: throw IllegalStateException("Update manifest empty")
-            return json.decodeFromString<AppUpdateManifest>(body)
-        }
-    }
-
-    private fun downloadApk(manifestUrl: String, manifest: AppUpdateManifest): File {
-        val apkUrl = manifestUrl.toHttpUrl().resolve(manifest.apkUrl)
+    private fun downloadApk(update: AppUpdateInfo): File {
+        val apkUrl = update.manifestUrl.toHttpUrl().resolve(update.apkUrl)
             ?: throw IllegalStateException("APK URL invalid")
         val request = Request.Builder()
             .url(apkUrl)
@@ -78,7 +55,7 @@ class AppUpdateInstaller(
         val updateDir = appContext.cacheDir.resolve("updates")
         updateDir.mkdirs()
         updateDir.listFiles()?.forEach { it.delete() }
-        val apkFile = File(updateDir, "purefin-${manifest.versionCode}.apk")
+        val apkFile = File(updateDir, "purefin-${update.versionCode}.apk")
 
         client.newCall(request).execute().use { response ->
             if (!response.isSuccessful) {
@@ -165,10 +142,3 @@ class AppUpdateInstaller(
         }
     }
 }
-
-@Serializable
-private data class AppUpdateManifest(
-    val versionCode: Long,
-    val versionName: String? = null,
-    val apkUrl: String
-)

app/src/main/java/hu/bbara/purefin/update/AppUpdateModule.kt

@@ -0,0 +1,19 @@
+package hu.bbara.purefin.update
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import hu.bbara.purefin.feature.update.AppUpdateInstaller
+import hu.bbara.purefin.feature.update.AppVersionProvider
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class AppUpdateModule {
+
+    @Binds
+    abstract fun bindAppUpdateInstaller(impl: AndroidAppUpdateInstaller): AppUpdateInstaller
+
+    @Binds
+    abstract fun bindAppVersionProvider(impl: BuildConfigAppVersionProvider): AppVersionProvider
+}

app/src/main/java/hu/bbara/purefin/update/BuildConfigAppVersionProvider.kt

@@ -0,0 +1,9 @@
+package hu.bbara.purefin.update
+
+import hu.bbara.purefin.BuildConfig
+import hu.bbara.purefin.feature.update.AppVersionProvider
+import javax.inject.Inject
+
+class BuildConfigAppVersionProvider @Inject constructor() : AppVersionProvider {
+    override val versionCode: Long = BuildConfig.VERSION_CODE.toLong()
+}

core/src/main/java/hu/bbara/purefin/feature/update/AppUpdateInfo.kt

@@ -0,0 +1,9 @@
+package hu.bbara.purefin.feature.update
+
+data class AppUpdateInfo(
+    val versionCode: Long,
+    val versionName: String?,
+    val releaseNotes: String?,
+    val apkUrl: String,
+    val manifestUrl: String
+)

core/src/main/java/hu/bbara/purefin/feature/update/AppUpdateInstaller.kt

@@ -0,0 +1,5 @@
+package hu.bbara.purefin.feature.update
+
+interface AppUpdateInstaller {
+    suspend fun installUpdate(update: AppUpdateInfo): String
+}

core/src/main/java/hu/bbara/purefin/feature/update/AppUpdateRepository.kt

@@ -0,0 +1,57 @@
+package hu.bbara.purefin.feature.update
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import javax.inject.Inject
+
+class AppUpdateRepository @Inject constructor(
+    private val appVersionProvider: AppVersionProvider
+) {
+    private val client = OkHttpClient()
+    private val json = Json { ignoreUnknownKeys = true }
+
+    suspend fun checkForUpdate(): AppUpdateInfo? {
+        val manifestUrl = "http://purefin.t.bbara.hu/app/update.json"
+        if (manifestUrl.isBlank()) {
+            throw IllegalStateException("Update manifest URL not configured")
+        }
+
+        val manifest = withContext(Dispatchers.IO) { fetchManifest(manifestUrl) }
+        if (manifest.versionCode <= appVersionProvider.versionCode) {
+            return null
+        }
+
+        return AppUpdateInfo(
+            versionCode = manifest.versionCode,
+            versionName = manifest.versionName,
+            releaseNotes = manifest.releaseNotes,
+            apkUrl = manifest.apkUrl,
+            manifestUrl = manifestUrl
+        )
+    }
+
+    private fun fetchManifest(manifestUrl: String): AppUpdateManifest {
+        val request = Request.Builder()
+            .url(manifestUrl)
+            .build()
+        client.newCall(request).execute().use { response ->
+            if (!response.isSuccessful) {
+                throw IllegalStateException("Update check failed: HTTP ${response.code}")
+            }
+            val body = response.body?.string() ?: throw IllegalStateException("Update manifest empty")
+            return json.decodeFromString<AppUpdateManifest>(body)
+        }
+    }
+}
+
+@Serializable
+private data class AppUpdateManifest(
+    val versionCode: Long,
+    val versionName: String? = null,
+    val apkUrl: String,
+    val releaseNotes: String? = null
+)

core/src/main/java/hu/bbara/purefin/feature/update/AppUpdateViewModel.kt

@@ -0,0 +1,76 @@
+package hu.bbara.purefin.feature.update
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class AppUpdateViewModel @Inject constructor(
+    private val appUpdateRepository: AppUpdateRepository,
+    private val appUpdateInstaller: AppUpdateInstaller
+) : ViewModel() {
+
+    private val _isCheckingForUpdates = MutableStateFlow(false)
+    val isCheckingForUpdates: StateFlow<Boolean> = _isCheckingForUpdates.asStateFlow()
+
+    private val _availableUpdate = MutableStateFlow<AppUpdateInfo?>(null)
+    val availableUpdate: StateFlow<AppUpdateInfo?> = _availableUpdate.asStateFlow()
+
+    private val _snackbarMessages = MutableSharedFlow<String>()
+    val snackbarMessages: SharedFlow<String> = _snackbarMessages.asSharedFlow()
+
+    private var isInstallingUpdate = false
+
+    fun checkForUpdates() {
+        if (_isCheckingForUpdates.value) {
+            return
+        }
+
+        viewModelScope.launch {
+            _isCheckingForUpdates.value = true
+            try {
+                val update = appUpdateRepository.checkForUpdate()
+                if (update == null) {
+                    _snackbarMessages.emit("Purefin is up to date")
+                } else {
+                    _availableUpdate.value = update
+                }
+            } catch (e: Exception) {
+                _snackbarMessages.emit(e.message ?: "Update check failed")
+            } finally {
+                _isCheckingForUpdates.value = false
+            }
+        }
+    }
+
+    fun acceptUpdate() {
+        val update = _availableUpdate.value ?: return
+        if (isInstallingUpdate) {
+            return
+        }
+
+        viewModelScope.launch {
+            isInstallingUpdate = true
+            _availableUpdate.value = null
+            try {
+                _snackbarMessages.emit(appUpdateInstaller.installUpdate(update))
+            } catch (e: Exception) {
+                _snackbarMessages.emit(e.message ?: "Update install failed")
+            } finally {
+                isInstallingUpdate = false
+            }
+        }
+    }
+
+    fun declineUpdate() {
+        _availableUpdate.value = null
+    }
+}

core/src/main/java/hu/bbara/purefin/feature/update/AppVersionProvider.kt

@@ -0,0 +1,5 @@
+package hu.bbara.purefin.feature.update
+
+interface AppVersionProvider {
+    val versionCode: Long
+}