Improve error handling on download failure

app/src/main/java/org/jellyfin/mobile/downloads/DownloadQueue.kt

@@ -16,6 +16,7 @@ import org.jellyfin.sdk.api.client.extensions.imageApi
 import org.jellyfin.sdk.api.client.extensions.libraryApi
 import org.jellyfin.sdk.model.api.ImageFormat
 import org.jellyfin.sdk.model.api.ImageType
+import java.io.IOException
 
 class DownloadQueue(
     private val context: Context,
@@ -70,11 +71,15 @@ class DownloadQueue(
 
             notificationProgressCallback.onEnd()
             downloadDao.update(downloadWithFiles.download.copy(status = DownloadStatus.DOWNLOADED))
-        } catch (_: CancellationException) {
+        } catch (e: CancellationException) {
             downloadDao.update(downloadWithFiles.download.copy(status = DownloadStatus.QUEUED))
-        } catch (error: Throwable) {
+            throw e
+        } catch (e: IOException) {
+            downloadDao.update(downloadWithFiles.download.copy(status = DownloadStatus.QUEUED))
+            throw e
+        } catch (e: Exception) {
             downloadDao.update(downloadWithFiles.download.copy(status = DownloadStatus.ERROR))
-            throw error
+            throw e
         }
     }
 
@@ -111,6 +116,9 @@ class DownloadQueue(
                     status = DownloadStatus.DOWNLOADED,
                 ),
             )
+        } catch (e: IOException) {
+            downloadDao.updateFile(file.copy(status = DownloadStatus.QUEUED))
+            throw e
         } catch (e: Exception) {
             downloadDao.updateFile(file.copy(status = DownloadStatus.ERROR))
             throw e

app/src/main/java/org/jellyfin/mobile/downloads/DownloadWorker.kt

@@ -11,9 +11,11 @@ import androidx.work.OutOfQuotaPolicy
 import androidx.work.WorkInfo
 import androidx.work.WorkManager
 import androidx.work.WorkerParameters
+import kotlinx.coroutines.CancellationException
 import org.jellyfin.mobile.app.AppPreferences
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.inject
+import java.io.IOException
 
 class DownloadWorker(
     context: Context,
@@ -57,11 +59,18 @@ class DownloadWorker(
 
     override suspend fun doWork(): Result {
         val canProcess = downloadQueue.prepare()
-        if (!canProcess) return Result.failure()
+        if (!canProcess) return Result.success()
 
         setForeground(getForegroundInfo())
-        downloadQueue.process()
-
-        return Result.success()
+        return try {
+            downloadQueue.process()
+            Result.success()
+        } catch (e: CancellationException) {
+            throw e
+        } catch (_: IOException) {
+            Result.retry()
+        } catch (_: Exception) {
+            Result.failure()
+        }
     }
 }