added cargo files

PinePods-0.8.2/mobile/lib/entities/persistable.dart

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+// Copyright 2020 Ben Hills. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+enum LastState { none, completed, stopped, paused }
+
+/// This class is used to persist information about the currently playing episode to disk.
+///
+/// This allows the background audio service to persist state (whilst the UI is not visible)
+/// and for the episode play and position details to be restored when the UI becomes visible
+/// again - either when bringing it to the foreground or upon next start.
+class Persistable {
+  /// The Podcast GUID.
+  String pguid;
+
+  /// The episode ID (provided by the DB layer).
+  int episodeId;
+
+  /// The current position in seconds;
+  int position;
+
+  /// The current playback state.
+  LastState state;
+
+  /// Date & time episode was last updated.
+  DateTime? lastUpdated;
+
+  Persistable({
+    required this.pguid,
+    required this.episodeId,
+    required this.position,
+    required this.state,
+    this.lastUpdated,
+  });
+
+  Persistable.empty()
+      : pguid = '',
+        episodeId = 0,
+        position = 0,
+        state = LastState.none,
+        lastUpdated = DateTime.now();
+
+  Map<String, dynamic> toMap() {
+    return <String, dynamic>{
+      'pguid': pguid,
+      'episodeId': episodeId,
+      'position': position,
+      'state': state.toString(),
+      'lastUpdated': lastUpdated == null ? DateTime.now().millisecondsSinceEpoch : lastUpdated!.millisecondsSinceEpoch,
+    };
+  }
+
+  static Persistable fromMap(Map<String, dynamic> persistable) {
+    var stateString = persistable['state'] as String?;
+    var state = LastState.none;
+
+    if (stateString != null) {
+      switch (stateString) {
+        case 'LastState.completed':
+          state = LastState.completed;
+          break;
+        case 'LastState.stopped':
+          state = LastState.stopped;
+          break;
+        case 'LastState.paused':
+          state = LastState.paused;
+          break;
+      }
+    }
+
+    var lastUpdated = persistable['lastUpdated'] as int?;
+
+    return Persistable(
+      pguid: persistable['pguid'] as String,
+      episodeId: persistable['episodeId'] as int,
+      position: persistable['position'] as int,
+      state: state,
+      lastUpdated: lastUpdated == null ? DateTime.now() : DateTime.fromMillisecondsSinceEpoch(lastUpdated),
+    );
+  }
+}