feat: delete old videos Directory

app/src/main/java/org/openedx/app/AppViewModel.kt

@@ -13,6 +13,7 @@ import org.openedx.core.BaseViewModel
 import org.openedx.core.SingleEventLiveData
 import org.openedx.core.config.Config
 import org.openedx.core.data.storage.CorePreferences
+import org.openedx.core.utils.FileUtil
 
 class AppViewModel(
     private val config: Config,
@@ -21,6 +22,7 @@ class AppViewModel(
     private val preferencesManager: CorePreferences,
     private val dispatcher: CoroutineDispatcher,
     private val analytics: AppAnalytics,
+    private val fileUtil: FileUtil,
 ) : BaseViewModel() {
 
     private val _logoutUser = SingleEventLiveData<Unit>()
@@ -32,10 +34,14 @@ class AppViewModel(
     private var logoutHandledAt: Long = 0
 
     val isBranchEnabled get() = config.getBranchConfig().enabled
+    private val canResetAppDirectory get() = preferencesManager.canResetAppDirectory
 
     override fun onCreate(owner: LifecycleOwner) {
         super.onCreate(owner)
         setUserId()
+        if (canResetAppDirectory) {
+            resetAppDirectory()
+        }
         viewModelScope.launch {
             notifier.notifier.collect { event ->
                 if (event is LogoutEvent && System.currentTimeMillis() - logoutHandledAt > 5000) {
@@ -60,6 +66,11 @@ class AppViewModel(
         )
     }
 
+    private fun resetAppDirectory() {
+        fileUtil.deleteOldAppDirectory()
+        preferencesManager.canResetAppDirectory = false
+    }
+
     private fun setUserId() {
         preferencesManager.user?.let {
             analytics.setUserIdForSession(it.id)

app/src/main/java/org/openedx/app/data/storage/PreferencesManager.kt

@@ -152,6 +152,12 @@ class PreferencesManager(context: Context) : CorePreferences, ProfilePreferences
         }
         get() = getBoolean(APP_WAS_POSITIVE_RATED)
 
+    override var canResetAppDirectory: Boolean
+        set(value) {
+            saveBoolean(RESET_APP_DIRECTORY, value)
+        }
+        get() = getBoolean(RESET_APP_DIRECTORY, true)
+
     override fun setCalendarSyncEventsDialogShown(courseName: String) {
         saveBoolean(courseName.replaceSpace("_"), true)
     }
@@ -172,5 +178,6 @@ class PreferencesManager(context: Context) : CorePreferences, ProfilePreferences
         private const val VIDEO_SETTINGS_STREAMING_QUALITY = "video_settings_streaming_quality"
         private const val VIDEO_SETTINGS_DOWNLOAD_QUALITY = "video_settings_download_quality"
         private const val APP_CONFIG = "app_config"
+        private const val RESET_APP_DIRECTORY = "reset_app_directory"
     }
 }

app/src/main/java/org/openedx/app/di/ScreenModule.kt

@@ -67,7 +67,7 @@ import org.openedx.whatsnew.presentation.whatsnew.WhatsNewViewModel
 
 val screenModule = module {
 
-    viewModel { AppViewModel(get(), get(), get(), get(), get(named("IODispatcher")), get()) }
+    viewModel { AppViewModel(get(), get(), get(), get(), get(named("IODispatcher")), get(), get()) }
     viewModel { MainViewModel(get(), get(), get()) }
 
     factory { AuthRepository(get(), get(), get()) }

app/src/test/java/org/openedx/AppViewModelTest.kt

@@ -28,6 +28,7 @@ import org.openedx.app.system.notifier.AppNotifier
 import org.openedx.app.system.notifier.LogoutEvent
 import org.openedx.core.config.Config
 import org.openedx.core.data.model.User
+import org.openedx.core.utils.FileUtil
 
 @ExperimentalCoroutinesApi
 class AppViewModelTest {
@@ -42,6 +43,7 @@ class AppViewModelTest {
     private val room = mockk<AppDatabase>()
     private val preferencesManager = mockk<PreferencesManager>()
     private val analytics = mockk<AppAnalytics>()
+    private val fileUtil = mockk<FileUtil>()
 
     private val user = User(0, "", "", "")
 
@@ -60,8 +62,17 @@ class AppViewModelTest {
         every { analytics.setUserIdForSession(any()) } returns Unit
         every { preferencesManager.user } returns user
         every { notifier.notifier } returns flow { }
+        every { preferencesManager.canResetAppDirectory } returns false
         val viewModel =
-            AppViewModel(config, notifier, room, preferencesManager, dispatcher, analytics)
+            AppViewModel(
+                config,
+                notifier,
+                room,
+                preferencesManager,
+                dispatcher,
+                analytics,
+                fileUtil
+            )
 
         val mockLifeCycleOwner: LifecycleOwner = mockk()
         val lifecycleRegistry = LifecycleRegistry(mockLifeCycleOwner)
@@ -82,8 +93,17 @@ class AppViewModelTest {
         every { preferencesManager.user } returns user
         every { room.clearAllTables() } returns Unit
         every { analytics.logoutEvent(true) } returns Unit
+        every { preferencesManager.canResetAppDirectory } returns false
         val viewModel =
-            AppViewModel(config, notifier, room, preferencesManager, dispatcher, analytics)
+            AppViewModel(
+                config,
+                notifier,
+                room,
+                preferencesManager,
+                dispatcher,
+                analytics,
+                fileUtil
+            )
 
         val mockLifeCycleOwner: LifecycleOwner = mockk()
         val lifecycleRegistry = LifecycleRegistry(mockLifeCycleOwner)
@@ -106,8 +126,17 @@ class AppViewModelTest {
         every { preferencesManager.user } returns user
         every { room.clearAllTables() } returns Unit
         every { analytics.logoutEvent(true) } returns Unit
+        every { preferencesManager.canResetAppDirectory } returns false
         val viewModel =
-            AppViewModel(config, notifier, room, preferencesManager, dispatcher, analytics)
+            AppViewModel(
+                config,
+                notifier,
+                room,
+                preferencesManager,
+                dispatcher,
+                analytics,
+                fileUtil
+            )
 
         val mockLifeCycleOwner: LifecycleOwner = mockk()
         val lifecycleRegistry = LifecycleRegistry(mockLifeCycleOwner)

core/src/main/java/org/openedx/core/data/storage/CorePreferences.kt

@@ -11,6 +11,7 @@ interface CorePreferences {
     var user: User?
     var videoSettings: VideoSettings
     var appConfig: AppConfig
+    var canResetAppDirectory: Boolean
 
     fun clear()
 }

core/src/main/java/org/openedx/core/utils/FileUtil.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import java.io.File
+import java.util.Collections
 
 class FileUtil(val context: Context) {
 
@@ -15,7 +16,10 @@ class FileUtil(val context: Context) {
         return file
     }
 
-    inline fun <reified T> saveObjectToFile(obj: T, fileName: String = "${T::class.java.simpleName}.json") {
+    inline fun <reified T> saveObjectToFile(
+        obj: T,
+        fileName: String = "${T::class.java.simpleName}.json",
+    ) {
         val gson: Gson = GsonBuilder().setPrettyPrinting().create()
         val jsonString = gson.toJson(obj)
         File(getExternalAppDir().path + fileName).writeText(jsonString)
@@ -31,6 +35,43 @@ class FileUtil(val context: Context) {
             null
         }
     }
+
+    /**
+     * Deletes all the files and directories in the app's external storage directory.
+     */
+    fun deleteOldAppDirectory() {
+        val externalFilesDir = context.getExternalFilesDir(null)
+        val externalAppDir = File(externalFilesDir?.parentFile, Directories.VIDEOS.name)
+        if (externalAppDir.isDirectory) {
+            deleteRecursive(externalAppDir, Collections.emptyList())
+        }
+    }
+
+    /**
+     * Deletes a file or directory and all its content recursively.
+     *
+     * @param fileOrDirectory The file or directory that needs to be deleted.
+     * @param exceptions      Names of the files or directories that need to be skipped while deletion.
+     */
+    private fun deleteRecursive(
+        fileOrDirectory: File,
+        exceptions: List<String>,
+    ) {
+        if (exceptions.contains(fileOrDirectory.name)) return
+
+        if (fileOrDirectory.isDirectory) {
+            val filesList = fileOrDirectory.listFiles()
+            if (filesList != null) {
+                for (child in filesList) {
+                    deleteRecursive(child, exceptions)
+                }
+            }
+        }
+
+        // Don't break the recursion upon encountering an error
+        // noinspection ResultOfMethodCallIgnored
+        fileOrDirectory.delete()
+    }
 }
 
 enum class Directories {

dashboard/src/main/java/org/openedx/dashboard/presentation/DashboardListFragment.kt

@@ -381,7 +381,7 @@ private fun CourseItem(
     apiHostUrl: String,
     enrolledCourse: EnrolledCourse,
     windowSize: WindowSize,
-    onClick: (EnrolledCourse) -> Unit
+    onClick: (EnrolledCourse) -> Unit,
 ) {
     val imageWidth by remember(key1 = windowSize) {
         mutableStateOf(

dashboard/src/main/java/org/openedx/dashboard/presentation/DashboardListViewModel.kt

@@ -27,7 +27,7 @@ class DashboardListViewModel(
     private val resourceManager: ResourceManager,
     private val discoveryNotifier: DiscoveryNotifier,
     private val analytics: DashboardAnalytics,
-    private val appUpgradeNotifier: AppUpgradeNotifier
+    private val appUpgradeNotifier: AppUpgradeNotifier,
 ) : BaseViewModel() {
 
     private val coursesList = mutableListOf<EnrolledCourse>()