Decouple restoring Playable from Preferences and storing position

Breaks dependency cycle

core/src/main/java/de/danoeh/antennapod/core/preferences/PlaybackPreferences.java

@@ -2,9 +2,12 @@ package de.danoeh.antennapod.core.preferences;
 
 import android.content.Context;
 import android.content.SharedPreferences;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.preference.PreferenceManager;
 
 import android.util.Log;
+import de.danoeh.antennapod.core.storage.DBReader;
 import de.danoeh.antennapod.event.PlayerStatusEvent;
 import de.danoeh.antennapod.model.feed.FeedMedia;
 import de.danoeh.antennapod.model.playback.MediaType;
@@ -187,4 +190,48 @@ public class PlaybackPreferences implements SharedPreferences.OnSharedPreference
         }
         return playerStatusAsInt;
     }
+
+    /**
+     * Restores a playable object from a sharedPreferences file. This method might load data from the database,
+     * depending on the type of playable that was restored.
+     *
+     * @return The restored Playable object
+     */
+    @Nullable
+    public static Playable createInstanceFromPreferences(@NonNull Context context) {
+        long currentlyPlayingMedia = PlaybackPreferences.getCurrentlyPlayingMediaType();
+        if (currentlyPlayingMedia != PlaybackPreferences.NO_MEDIA_PLAYING) {
+            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context.getApplicationContext());
+            return createInstanceFromPreferences((int) currentlyPlayingMedia, prefs);
+        }
+        return null;
+    }
+
+    /**
+     * Restores a playable object from a sharedPreferences file. This method might load data from the database,
+     * depending on the type of playable that was restored.
+     *
+     * @param type An integer that represents the type of the Playable object
+     *             that is restored.
+     * @param pref The SharedPreferences file from which the Playable object
+     *             is restored
+     * @return The restored Playable object
+     */
+    private static Playable createInstanceFromPreferences(int type, SharedPreferences pref) {
+        if (type == FeedMedia.PLAYABLE_TYPE_FEEDMEDIA) {
+            return createFeedMediaInstance(pref);
+        } else {
+            Log.e(TAG, "Could not restore Playable object from preferences");
+            return null;
+        }
+    }
+
+    private static Playable createFeedMediaInstance(SharedPreferences pref) {
+        Playable result = null;
+        long mediaId = pref.getLong(FeedMedia.PREF_MEDIA_ID, -1);
+        if (mediaId != -1) {
+            result =  DBReader.getFeedMedia(mediaId);
+        }
+        return result;
+    }
 }

core/src/main/java/de/danoeh/antennapod/core/service/playback/PlaybackService.java

@@ -46,6 +46,7 @@ import androidx.media.MediaBrowserServiceCompat;
 import androidx.preference.PreferenceManager;
 
 import de.danoeh.antennapod.core.service.QuickSettingsTileService;
+import de.danoeh.antennapod.core.util.playback.PlayableUtils;
 import de.danoeh.antennapod.event.playback.BufferUpdateEvent;
 import de.danoeh.antennapod.event.playback.PlaybackServiceEvent;
 import de.danoeh.antennapod.event.PlayerErrorEvent;
@@ -82,7 +83,6 @@ import de.danoeh.antennapod.core.util.FeedItemUtil;
 import de.danoeh.antennapod.core.util.IntentUtils;
 import de.danoeh.antennapod.core.util.NetworkUtils;
 import de.danoeh.antennapod.core.util.gui.NotificationUtils;
-import de.danoeh.antennapod.core.util.playback.PlayableUtils;
 import de.danoeh.antennapod.core.util.playback.PlaybackServiceStarter;
 import de.danoeh.antennapod.core.widget.WidgetUpdater;
 import de.danoeh.antennapod.model.feed.Feed;
@@ -702,7 +702,7 @@ public class PlaybackService extends MediaBrowserServiceCompat {
     }
 
     private void startPlayingFromPreferences() {
-        Observable.fromCallable(() -> PlayableUtils.createInstanceFromPreferences(getApplicationContext()))
+        Observable.fromCallable(() -> PlaybackPreferences.createInstanceFromPreferences(getApplicationContext()))
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(

core/src/main/java/de/danoeh/antennapod/core/storage/DBWriter.java

@@ -42,7 +42,6 @@ import de.danoeh.antennapod.core.util.FeedItemPermutors;
 import de.danoeh.antennapod.core.util.IntentUtils;
 import de.danoeh.antennapod.core.util.LongList;
 import de.danoeh.antennapod.core.util.Permutor;
-import de.danoeh.antennapod.core.util.playback.PlayableUtils;
 import de.danoeh.antennapod.model.feed.Feed;
 import de.danoeh.antennapod.model.feed.FeedItem;
 import de.danoeh.antennapod.model.feed.FeedMedia;
@@ -391,7 +390,7 @@ public class DBWriter {
             List<FeedItem> updatedItems = new ArrayList<>();
             ItemEnqueuePositionCalculator positionCalculator =
                     new ItemEnqueuePositionCalculator(UserPreferences.getEnqueueLocation());
-            Playable currentlyPlaying = PlayableUtils.createInstanceFromPreferences(context);
+            Playable currentlyPlaying = PlaybackPreferences.createInstanceFromPreferences(context);
             int insertPosition = positionCalculator.calcPosition(queue, currentlyPlaying);
             for (long itemId : itemIds) {
                 if (!itemListContains(queue, itemId)) {

core/src/main/java/de/danoeh/antennapod/core/util/playback/PlayableUtils.java

@@ -1,79 +1,14 @@
 package de.danoeh.antennapod.core.util.playback;
 
-import android.content.Context;
+import de.danoeh.antennapod.core.storage.DBWriter;
-import android.content.SharedPreferences;
-import android.util.Log;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.preference.PreferenceManager;
-
 import de.danoeh.antennapod.model.feed.FeedItem;
 import de.danoeh.antennapod.model.feed.FeedMedia;
-import de.danoeh.antennapod.core.preferences.PlaybackPreferences;
-import de.danoeh.antennapod.core.storage.DBReader;
-import de.danoeh.antennapod.core.storage.DBWriter;
 import de.danoeh.antennapod.model.playback.Playable;
 
 /**
  * Provides utility methods for Playable objects.
  */
 public abstract class PlayableUtils {
-
-    private static final String TAG = "PlayableUtils";
-
-    /**
-     * Restores a playable object from a sharedPreferences file. This method might load data from the database,
-     * depending on the type of playable that was restored.
-     *
-     * @return The restored Playable object
-     */
-    @Nullable
-    public static Playable createInstanceFromPreferences(@NonNull Context context) {
-        long currentlyPlayingMedia = PlaybackPreferences.getCurrentlyPlayingMediaType();
-        if (currentlyPlayingMedia != PlaybackPreferences.NO_MEDIA_PLAYING) {
-            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context.getApplicationContext());
-            return PlayableUtils.createInstanceFromPreferences((int) currentlyPlayingMedia, prefs);
-        }
-        return null;
-    }
-
-    /**
-     * Restores a playable object from a sharedPreferences file. This method might load data from the database,
-     * depending on the type of playable that was restored.
-     *
-     * @param type An integer that represents the type of the Playable object
-     *             that is restored.
-     * @param pref The SharedPreferences file from which the Playable object
-     *             is restored
-     * @return The restored Playable object
-     */
-    private static Playable createInstanceFromPreferences(int type, SharedPreferences pref) {
-        Playable result;
-        // ADD new Playable types here:
-        switch (type) {
-            case FeedMedia.PLAYABLE_TYPE_FEEDMEDIA:
-                result = createFeedMediaInstance(pref);
-                break;
-            default:
-                result = null;
-                break;
-        }
-        if (result == null) {
-            Log.e(TAG, "Could not restore Playable object from preferences");
-        }
-        return result;
-    }
-
-    private static Playable createFeedMediaInstance(SharedPreferences pref) {
-        Playable result = null;
-        long mediaId = pref.getLong(FeedMedia.PREF_MEDIA_ID, -1);
-        if (mediaId != -1) {
-            result =  DBReader.getFeedMedia(mediaId);
-        }
-        return result;
-    }
-
     /**
      * Saves the current position of this object.
      *

core/src/main/java/de/danoeh/antennapod/core/util/playback/PlaybackController.java

@@ -341,7 +341,7 @@ public abstract class PlaybackController {
 
     public Playable getMedia() {
         if (media == null) {
-            media = PlayableUtils.createInstanceFromPreferences(activity);
+            media = PlaybackPreferences.createInstanceFromPreferences(activity);
         }
         return media;
     }

core/src/main/java/de/danoeh/antennapod/core/widget/WidgetUpdaterWorker.java

@@ -9,7 +9,7 @@ import androidx.work.WorkManager;
 import androidx.work.Worker;
 import androidx.work.WorkerParameters;
 import de.danoeh.antennapod.core.feed.util.PlaybackSpeedUtils;
-import de.danoeh.antennapod.core.util.playback.PlayableUtils;
+import de.danoeh.antennapod.core.preferences.PlaybackPreferences;
 import de.danoeh.antennapod.model.playback.Playable;
 import de.danoeh.antennapod.playback.base.PlayerStatus;
 
@@ -43,7 +43,7 @@ public class WidgetUpdaterWorker extends Worker {
      * Loads the current media from the database and updates the widget in a background job.
      */
     private void updateWidget() {
-        final Playable media = PlayableUtils.createInstanceFromPreferences(getApplicationContext());
+        final Playable media = PlaybackPreferences.createInstanceFromPreferences(getApplicationContext());
         if (media != null) {
             WidgetUpdater.updateWidget(getApplicationContext(),
                     new WidgetUpdater.WidgetState(media, PlayerStatus.STOPPED,

model/src/main/java/de/danoeh/antennapod/model/playback/Playable.java

@@ -19,7 +19,7 @@ public interface Playable extends Parcelable, Serializable {
 
     /**
      * Save information about the playable in a preference so that it can be
-     * restored later via PlayableUtils.createInstanceFromPreferences.
+     * restored later via PlaybackPreferences.createInstanceFromPreferences.
      * Implementations must NOT call commit() after they have written the values
      * to the preferences file.
      */
@@ -136,7 +136,7 @@ public interface Playable extends Parcelable, Serializable {
 
     /**
      * Returns an integer that must be unique among all Playable classes. The
-     * return value is later used by PlayableUtils to determine the type of the
+     * return value is later used by PlaybackPreferences to determine the type of the
      * Playable object that is restored.
      */
     int getPlayableType();