Migrate PlaylistResponse to JSON Class

lib/src/reverse_engineering/responses/generated/playlist_response.g.dart

@@ -0,0 +1,203 @@
+// To parse this JSON data, do
+//
+//     final playlistResponseJson = playlistResponseJsonFromJson(jsonString);
+
+import 'dart:convert';
+
+class PlaylistResponseJson {
+  PlaylistResponseJson({
+    this.title,
+    this.views,
+    this.description,
+    this.video,
+    this.author,
+    this.likes,
+    this.dislikes,
+  });
+
+  final String title;
+  final int views;
+  final String description;
+  final List<Video> video;
+  final String author;
+  final int likes;
+  final int dislikes;
+
+  factory PlaylistResponseJson.fromRawJson(String str) =>
+      PlaylistResponseJson.fromJson(json.decode(str));
+
+  String toRawJson() => json.encode(toJson());
+
+  factory PlaylistResponseJson.fromJson(Map<String, dynamic> json) =>
+      PlaylistResponseJson(
+        title: json["title"] == null ? null : json["title"],
+        views: json["views"] == null ? null : json["views"],
+        description: json["description"] == null ? null : json["description"],
+        video: json["video"] == null
+            ? null
+            : List<Video>.from(json["video"].map((x) => Video.fromJson(x))),
+        author: json["author"] == null ? null : json["author"],
+        likes: json["likes"] == null ? null : json["likes"],
+        dislikes: json["dislikes"] == null ? null : json["dislikes"],
+      );
+
+  Map<String, dynamic> toJson() => {
+        "title": title == null ? null : title,
+        "views": views == null ? null : views,
+        "description": description == null ? null : description,
+        "video": video == null
+            ? null
+            : List<dynamic>.from(video.map((x) => x.toJson())),
+        "author": author == null ? null : author,
+        "likes": likes == null ? null : likes,
+        "dislikes": dislikes == null ? null : dislikes,
+      };
+}
+
+class Video {
+  Video({
+    this.sessionData,
+    this.timeCreated,
+    this.ccLicense,
+    this.title,
+    this.rating,
+    this.isHd,
+    this.privacy,
+    this.lengthSeconds,
+    this.keywords,
+    this.views,
+    this.encryptedId,
+    this.likes,
+    this.isCc,
+    this.description,
+    this.thumbnail,
+    this.userId,
+    this.added,
+    this.endscreenAutoplaySessionData,
+    this.comments,
+    this.dislikes,
+    this.categoryId,
+    this.duration,
+    this.author,
+  });
+
+  final SessionData sessionData;
+  final int timeCreated;
+  final bool ccLicense;
+  final String title;
+  final int rating;
+  final bool isHd;
+  final Privacy privacy;
+  final int lengthSeconds;
+  final String keywords;
+  final String views;
+  final String encryptedId;
+  final int likes;
+  final bool isCc;
+  final String description;
+  final String thumbnail;
+  final String userId;
+  final String added;
+  final EndscreenAutoplaySessionData endscreenAutoplaySessionData;
+  final String comments;
+  final int dislikes;
+  final int categoryId;
+  final String duration;
+  final String author;
+
+  factory Video.fromRawJson(String str) => Video.fromJson(json.decode(str));
+
+  String toRawJson() => json.encode(toJson());
+
+  factory Video.fromJson(Map<String, dynamic> json) => Video(
+        sessionData: json["session_data"] == null
+            ? null
+            : sessionDataValues.map[json["session_data"]],
+        timeCreated: json["time_created"] == null ? null : json["time_created"],
+        ccLicense: json["cc_license"] == null ? null : json["cc_license"],
+        title: json["title"] == null ? null : json["title"],
+        rating: json["rating"] == null ? null : json["rating"],
+        isHd: json["is_hd"] == null ? null : json["is_hd"],
+        privacy:
+            json["privacy"] == null ? null : privacyValues.map[json["privacy"]],
+        lengthSeconds:
+            json["length_seconds"] == null ? null : json["length_seconds"],
+        keywords: json["keywords"] == null ? null : json["keywords"],
+        views: json["views"] == null ? null : json["views"],
+        encryptedId: json["encrypted_id"] == null ? null : json["encrypted_id"],
+        likes: json["likes"] == null ? null : json["likes"],
+        isCc: json["is_cc"] == null ? null : json["is_cc"],
+        description: json["description"] == null ? null : json["description"],
+        thumbnail: json["thumbnail"] == null ? null : json["thumbnail"],
+        userId: json["user_id"] == null ? null : json["user_id"],
+        added: json["added"] == null ? null : json["added"],
+        endscreenAutoplaySessionData:
+            json["endscreen_autoplay_session_data"] == null
+                ? null
+                : endscreenAutoplaySessionDataValues
+                    .map[json["endscreen_autoplay_session_data"]],
+        comments: json["comments"] == null ? null : json["comments"],
+        dislikes: json["dislikes"] == null ? null : json["dislikes"],
+        categoryId: json["category_id"] == null ? null : json["category_id"],
+        duration: json["duration"] == null ? null : json["duration"],
+        author: json["author"] == null ? null : json["author"],
+      );
+
+  Map<String, dynamic> toJson() => {
+        "session_data":
+            sessionData == null ? null : sessionDataValues.reverse[sessionData],
+        "time_created": timeCreated == null ? null : timeCreated,
+        "cc_license": ccLicense == null ? null : ccLicense,
+        "title": title == null ? null : title,
+        "rating": rating == null ? null : rating,
+        "is_hd": isHd == null ? null : isHd,
+        "privacy": privacy == null ? null : privacyValues.reverse[privacy],
+        "length_seconds": lengthSeconds == null ? null : lengthSeconds,
+        "keywords": keywords == null ? null : keywords,
+        "views": views == null ? null : views,
+        "encrypted_id": encryptedId == null ? null : encryptedId,
+        "likes": likes == null ? null : likes,
+        "is_cc": isCc == null ? null : isCc,
+        "description": description == null ? null : description,
+        "thumbnail": thumbnail == null ? null : thumbnail,
+        "user_id": userId == null ? null : userId,
+        "added": added == null ? null : added,
+        "endscreen_autoplay_session_data": endscreenAutoplaySessionData == null
+            ? null
+            : endscreenAutoplaySessionDataValues
+                .reverse[endscreenAutoplaySessionData],
+        "comments": comments == null ? null : comments,
+        "dislikes": dislikes == null ? null : dislikes,
+        "category_id": categoryId == null ? null : categoryId,
+        "duration": duration == null ? null : duration,
+        "author": author == null ? null : author,
+      };
+}
+
+enum EndscreenAutoplaySessionData { FEATURE_AUTOPLAY }
+
+final endscreenAutoplaySessionDataValues = EnumValues(
+    {"feature=autoplay": EndscreenAutoplaySessionData.FEATURE_AUTOPLAY});
+
+enum Privacy { PUBLIC }
+
+final privacyValues = EnumValues({"public": Privacy.PUBLIC});
+
+enum SessionData { FEATURE_PLAYLIST }
+
+final sessionDataValues =
+    EnumValues({"feature=playlist": SessionData.FEATURE_PLAYLIST});
+
+class EnumValues<T> {
+  Map<String, T> map;
+  Map<T, String> reverseMap;
+
+  EnumValues(this.map);
+
+  Map<T, String> get reverse {
+    if (reverseMap == null) {
+      reverseMap = map.map((k, v) => new MapEntry(v, k));
+    }
+    return reverseMap;
+  }
+}

lib/src/reverse_engineering/responses/playlist_response.dart

@@ -6,47 +6,46 @@ import '../../exceptions/exceptions.dart';
 import '../../extensions/helpers_extension.dart';
 import '../../retry.dart';
 import '../youtube_http_client.dart';
+import 'generated/playlist_response.g.dart';
 
 ///
 class PlaylistResponse {
-  Iterable<_Video> _videos;
+  List<_Video> _videos;
 
   // Json parsed map
-  final Map<String, dynamic> _root;
+  PlaylistResponseJson _root;
 
   ///
-  String get title => _root['title'];
+  String get title => _root.title;
 
   ///
-  String get author => _root['author'];
+  String get author => _root.author;
 
   ///
-  String get description => _root['description'];
+  String get description => _root.description;
 
   ///
   ThumbnailSet get thumbnails => ThumbnailSet(videos.firstOrNull.id);
 
   ///
-  int get viewCount => _root['views'];
+  int get viewCount => _root.views;
 
   ///
-  int get likeCount => _root['likes'];
+  int get likeCount => _root.likes;
 
   ///
-  int get dislikeCount => _root['dislikes'];
+  int get dislikeCount => _root.dislikes;
 
   ///
-  Iterable<_Video> get videos => _videos ??=
-      _root['video']?.map((e) => _Video(e))?.cast<_Video>() ?? const <_Video>[];
+  List<_Video> get videos => _videos ??= _root.video.map((e) => _Video(e));
 
   ///
-  PlaylistResponse(this._root);
-
-  ///
-  PlaylistResponse.parse(String raw) : _root = json.tryDecode(raw) {
+  PlaylistResponse.parse(String raw) {
+    final t = json.tryDecode(raw);
     if (_root == null) {
       throw TransientFailureException('Playerlist response is broken.');
     }
+    _root = PlaylistResponseJson.fromJson(t);
   }
 
   ///
@@ -75,33 +74,33 @@ class PlaylistResponse {
 
 class _Video {
   // Json parsed map
-  final Map<String, dynamic> _root;
+  final Video root;
 
-  _Video(this._root);
+  _Video(this.root);
 
-  String get id => _root['encrypted_id'];
+  String get id => root.encryptedId;
 
-  String get author => _root['author'];
+  String get author => root.author;
 
-  ChannelId get channelId => ChannelId('UC${_root['user_id']}');
+  ChannelId get channelId => ChannelId('UC${root.userId}');
 
   DateTime get uploadDate =>
-      DateTime.fromMillisecondsSinceEpoch(_root['time_created'] * 1000);
+      DateTime.fromMillisecondsSinceEpoch(root.timeCreated * 1000);
 
-  String get title => _root['title'];
+  String get title => root.title;
 
-  String get description => _root['description'];
+  String get description => root.description;
 
-  Duration get duration => Duration(seconds: _root['length_seconds']);
+  Duration get duration => Duration(seconds: root.lengthSeconds);
 
-  int get viewCount => int.parse((_root['views'] as String).stripNonDigits());
+  int get viewCount => int.parse(root.views.stripNonDigits());
 
-  int get likes => _root['likes'];
+  int get likes => root.likes;
 
-  int get dislikes => _root['dislikes'];
+  int get dislikes => root.dislikes;
 
   Iterable<String> get keywords => RegExp(r'"[^\"]+"|\S+')
-      .allMatches(_root['keywords'])
+      .allMatches(root.keywords)
       .map((e) => e.group(0))
       .toList(growable: false);
 }