Allow pausing downloads from progress notification (#1637)

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt

@@ -37,7 +37,7 @@ internal class DownloadNotifier(private val context: Context) {
      */
     var initialQueueSize = 0
         set(value) {
-            if (value != 0){
+            if (value != 0) {
                 isSingleChapter = (value == 1)
             }
             field = value
@@ -99,6 +99,10 @@ internal class DownloadNotifier(private val context: Context) {
                 // Open download manager when clicked
                 setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
                 isDownloading = true
+                // Pause action
+                addAction(R.drawable.ic_av_pause_grey_24dp_img,
+                        context.getString(R.string.action_pause),
+                        NotificationReceiver.pauseDownloadsPendingBroadcast(context))
             }
 
             val title = download.manga.title.chop(15)

app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt

@@ -38,6 +38,11 @@ class NotificationReceiver : BroadcastReceiver() {
             ACTION_DISMISS_NOTIFICATION -> dismissNotification(context, intent.getIntExtra(EXTRA_NOTIFICATION_ID, -1))
             // Resume the download service
             ACTION_RESUME_DOWNLOADS -> DownloadService.start(context)
+            // Pause the download service
+            ACTION_PAUSE_DOWNLOADS -> {
+                DownloadService.stop(context)
+                downloadManager.pauseDownloads()
+            }
             // Clear the download queue
             ACTION_CLEAR_DOWNLOADS -> downloadManager.clearQueue(true)
             // Show message notification created
@@ -159,6 +164,9 @@ class NotificationReceiver : BroadcastReceiver() {
         // Called to resume downloads.
         private const val ACTION_RESUME_DOWNLOADS = "$ID.$NAME.ACTION_RESUME_DOWNLOADS"
 
+        // Called to pause downloads.
+        private const val ACTION_PAUSE_DOWNLOADS = "$ID.$NAME.ACTION_PAUSE_DOWNLOADS"
+
         // Called to clear downloads.
         private const val ACTION_CLEAR_DOWNLOADS = "$ID.$NAME.ACTION_CLEAR_DOWNLOADS"
 
@@ -190,6 +198,19 @@ class NotificationReceiver : BroadcastReceiver() {
             return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
         }
 
+        /**
+         * Returns [PendingIntent] that pauses the download queue
+         *
+         * @param context context of application
+         * @return [PendingIntent]
+         */
+        internal fun pauseDownloadsPendingBroadcast(context: Context): PendingIntent {
+            val intent = Intent(context, NotificationReceiver::class.java).apply {
+                action = ACTION_PAUSE_DOWNLOADS
+            }
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+        }
+
         /**
          * Returns a [PendingIntent] that clears the download queue
          *
@@ -203,7 +224,7 @@ class NotificationReceiver : BroadcastReceiver() {
             return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
         }
 
-        internal fun shortcutCreatedBroadcast(context: Context) : PendingIntent {
+        internal fun shortcutCreatedBroadcast(context: Context): PendingIntent {
             val intent = Intent(context, NotificationReceiver::class.java).apply {
                 action = ACTION_SHORTCUT_CREATED
             }