feat: option to only delete watched videos

app/src/main/java/com/github/libretube/db/DatabaseHelper.kt

@@ -87,16 +87,17 @@ object DatabaseHelper {
         }
     }
 
+    suspend fun isVideoWatched(videoId: String, duration: Long): Boolean = withContext(Dispatchers.IO) {
+        val historyItem = Database.watchPositionDao()
+            .findById(videoId) ?: return@withContext false
+        val progress = historyItem.position / 1000
+        // show video only in feed when watched less than 90%
+        return@withContext progress > 0.9f * duration
+    }
+
     suspend fun filterUnwatched(streams: List<StreamItem>): List<StreamItem> {
         return streams.filter {
-            withContext(Dispatchers.IO) {
+            !isVideoWatched(it.url.orEmpty().toID(), it.duration ?: 0)
-                val historyItem = Database.watchPositionDao()
-                    .findById(it.url.orEmpty().toID()) ?: return@withContext true
-                val progress = historyItem.position / 1000
-                val duration = it.duration ?: 0
-                // show video only in feed when watched less than 90%
-                progress < 0.9f * duration
-            }
         }
     }
 
@@ -105,14 +106,7 @@ object DatabaseHelper {
         unfinished: Boolean = true
     ): List<WatchHistoryItem> {
         return streams.filter {
-            withContext(Dispatchers.IO) {
+            unfinished xor isVideoWatched(it.videoId, it.duration ?: 0)
-                val historyItem = Database.watchPositionDao()
-                    .findById(it.videoId) ?: return@withContext true
-                val progress = historyItem.position / 1000
-                val duration = it.duration ?: 0
-                // show video only in feed when watched less than 90%
-                if (unfinished) progress < 0.9f * duration else progress > 0.9f * duration
-            }
         }
     }
 

app/src/main/java/com/github/libretube/ui/adapters/DownloadsAdapter.kt

@@ -148,6 +148,8 @@ class DownloadsAdapter(
             .show()
     }
 
+    fun itemAt(index: Int) = downloads[index]
+
     fun deleteDownload(position: Int) {
         val download = downloads[position].download
         val items = downloads[position].downloadItems

app/src/main/java/com/github/libretube/ui/fragments/DownloadsFragment.kt

@@ -24,6 +24,7 @@ import com.github.libretube.constants.IntentData
 import com.github.libretube.constants.PreferenceKeys
 import com.github.libretube.databinding.FragmentDownloadContentBinding
 import com.github.libretube.databinding.FragmentDownloadsBinding
+import com.github.libretube.db.DatabaseHelper
 import com.github.libretube.db.DatabaseHolder.Database
 import com.github.libretube.db.obj.DownloadWithItems
 import com.github.libretube.db.obj.filterByTab
@@ -270,14 +271,23 @@ class DownloadsFragmentPage : DynamicLayoutManagerFragment() {
     }
 
     private fun showDeleteAllDialog(context: Context, adapter: DownloadsAdapter) {
+        var onlyDeleteWatchedVideos = false
+
         MaterialAlertDialogBuilder(context)
             .setTitle(R.string.delete_all)
-            .setMessage(R.string.irreversible)
+            .setMultiChoiceItems(arrayOf(getString(R.string.delete_only_watched_videos)), null) { _, _, selected ->
+                onlyDeleteWatchedVideos = selected
+            }
             .setPositiveButton(R.string.okay) { _, _ ->
+                lifecycleScope.launch {
                     for (downloadIndex in downloads.size - 1 downTo 0) {
+                        val download = adapter.itemAt(downloadIndex).download
+                        if (!onlyDeleteWatchedVideos || DatabaseHelper.isVideoWatched(download.videoId, download.duration ?: 0)) {
                             adapter.deleteDownload(downloadIndex)
                         }
                     }
+                }
+            }
             .setNegativeButton(R.string.cancel, null)
             .show()
     }

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

@@ -521,6 +521,7 @@
     <string name="dialog_play_offline_title">A local version of this video is available.</string>
     <string name="dialog_play_offline_body">Would you like to play the video from the download folder?</string>
     <string name="view_count">%1$s views</string>
+    <string name="delete_only_watched_videos">Only delete already watched videos</string>
 
     <!-- Notification channel strings -->
     <string name="download_channel_name">Download Service</string>