Thumbnail for playlists

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## 1.4.0
 - Add ChannelId property to Video class.
+- Implement `thumbnails` for playlists. The playlist's thumbnail is the same as the thumbnail of its first video. If the playlist is empty, then this property is `null`.
+- Update for age restricted videos.
 
 ## 1.3.3
 - Error handling when using `getStream` if the connection fails. If it fails more than 5 times on the same request the exception will be thrown anyways.

lib/src/playlists/playlist.dart

@@ -21,11 +21,16 @@ class Playlist with EquatableMixin {
   /// Playlist description.
   final String description;
 
+  /// Available thumbnails for this playlist.
+  /// Can be null if the playlist is empty.
+  final ThumbnailSet thumbnails;
+
   /// Engagement statistics.
   final Engagement engagement;
 
   /// Initializes an instance of [Playlist].
-  Playlist(this.id, this.title, this.author, this.description, this.engagement);
+  Playlist(this.id, this.title, this.author, this.description, this.thumbnails,
+      this.engagement);
 
   @override
   String toString() => 'Playlist ($title)';

lib/src/playlists/playlist_client.dart

@@ -23,6 +23,7 @@ class PlaylistClient {
         response.title,
         response.author,
         response.description ?? '',
+        response.thumbnails,
         Engagement(response.viewCount ?? 0, response.likeCount ?? 0,
             response.dislikeCount ?? 0));
   }

lib/src/reverse_engineering/responses/playlist_response.dart

@@ -1,5 +1,7 @@
 import 'dart:convert';
 
+import 'package:youtube_explode_dart/src/common/common.dart';
+
 import '../../channels/channel_id.dart';
 import '../../exceptions/exceptions.dart';
 import '../../extensions/helpers_extension.dart';
@@ -7,6 +9,8 @@ import '../../retry.dart';
 import '../youtube_http_client.dart';
 
 class PlaylistResponse {
+  Iterable<_Video> _videos;
+
   // Json parsed map
   final Map<String, dynamic> _root;
 
@@ -16,13 +20,15 @@ class PlaylistResponse {
 
   String get description => _root['description'];
 
+  ThumbnailSet get thumbnails => ThumbnailSet(videos.firstOrNull.id);
+
   int get viewCount => _root['views'];
 
   int get likeCount => _root['likes'];
 
   int get dislikeCount => _root['dislikes'];
 
-  Iterable<_Video> get videos =>
+  Iterable<_Video> get videos => _videos ??=
       _root['video']?.map((e) => _Video(e))?.cast<_Video>() ?? const <_Video>[];
 
   PlaylistResponse(this._root);