Restore last played (#814)

Author: teamcons

data/music.gschema.xml

@@ -17,6 +17,11 @@
       <summary>The queue from last session to restore</summary>
       <description>An array of strings representing the files played last</description>
     </key>
+    <key type="s" name="uri-last-played">
+      <default>''</default>
+      <summary>The last song played by Music</summary>
+      <description>A string representing the uri of the last played music file</description>
+    </key>
 
     <key name="window-height" type="i">
       <default>475</default>

src/AudioObject.vala

@@ -15,4 +15,8 @@ public class Music.AudioObject : Object {
     public AudioObject (string uri) {
         Object (uri: uri);
     }
+
+    public static bool equal_func (AudioObject a, AudioObject b) {
+        return (a.uri == b.uri);
+    }
 }

src/PlaybackManager.vala

@@ -530,6 +530,9 @@ public class Music.PlaybackManager : Object {
         update_next_previous_sensitivity ();
 
         play_pause_action.set_enabled (current_audio != null);
+
+        var uri_last_played = current_audio != null ? current_audio.uri : "";
+        settings.set_string ("uri-last-played", uri_last_played);
     }
 
     private void save_queue () {
@@ -544,6 +547,10 @@ public class Music.PlaybackManager : Object {
     }
 
     public void restore_queue () {
+        // Restoring the queue overwrites the last played. So we need to retrieve it before taking care of the queue
+        var uri_last_played = settings.get_string ("uri-last-played");
+        var file_last_played = File.new_for_uri (uri_last_played);
+
         var last_session_uri = settings.get_strv ("previous-queue");
         var last_session_files = new File[last_session_uri.length];
 
@@ -555,5 +562,19 @@ public class Music.PlaybackManager : Object {
 
         var files_to_play = Application.loop_through_files (last_session_files);
         queue_files (files_to_play);
+
+        if (uri_last_played != "" && file_last_played.query_exists ()) {
+            var audio_object = new AudioObject (uri_last_played);
+            uint position = -1;
+            if (!queue_liststore.find_with_equal_func (
+                audio_object,
+                (EqualFunc<AudioObject>) AudioObject.equal_func,
+                out position
+            )) {
+                return;
+            }
+
+            current_audio = (AudioObject) queue_liststore.get_item (position);
+        }
     }
 }