Add channel search request and object

lib/api/twitch_api.dart

@@ -216,4 +216,16 @@ class Twitch {
       debugPrint('Channel does not exist');
     }
   }
+
+  /// Returns a list of channel query objects closest matching the given query string.
+  static Future<List<ChannelQuery>> searchChannels({required String query, required Map<String, String>? headers}) async {
+    final response = await http.get(Uri.parse('https://api.twitch.tv/helix/search/channels?first=8&query=$query'), headers: headers);
+    if (response.statusCode == 200) {
+      final channelData = jsonDecode(response.body)['data'] as List;
+
+      return channelData.map((e) => ChannelQuery.fromJson(e)).toList();
+    } else {
+      return [];
+    }
+  }
 }

lib/models/channel.dart

@@ -2,7 +2,7 @@ import 'package:json_annotation/json_annotation.dart';
 
 part 'channel.g.dart';
 
-// Object for Twitch channels.
+// Object for Twitch channel GET request.
 @JsonSerializable(createToJson: false, fieldRename: FieldRename.snake)
 class Channel {
   final String broadcasterId;
@@ -27,3 +27,35 @@ class Channel {
 
   factory Channel.fromJson(Map<String, dynamic> json) => _$ChannelFromJson(json);
 }
+
+// Object for Twitch channel search query.
+@JsonSerializable(createToJson: false, fieldRename: FieldRename.snake)
+class ChannelQuery {
+  final String broadcasterLanguage;
+  final String broadcasterLogin;
+  final String displayName;
+  final String gameId;
+  final String gameName;
+  final String id;
+  final bool isLive;
+  final List<String> tagIds;
+  final String thumbnailUrl;
+  final String title;
+  final String startedAt;
+
+  const ChannelQuery({
+    required this.broadcasterLanguage,
+    required this.broadcasterLogin,
+    required this.displayName,
+    required this.gameId,
+    required this.gameName,
+    required this.id,
+    required this.isLive,
+    required this.tagIds,
+    required this.thumbnailUrl,
+    required this.title,
+    required this.startedAt,
+  });
+
+  factory ChannelQuery.fromJson(Map<String, dynamic> json) => _$ChannelQueryFromJson(json);
+}

lib/models/channel.g.dart

@@ -16,3 +16,18 @@ Channel _$ChannelFromJson(Map<String, dynamic> json) => Channel(
       title: json['title'] as String,
       delay: json['delay'] as int,
     );
+
+ChannelQuery _$ChannelQueryFromJson(Map<String, dynamic> json) => ChannelQuery(
+      broadcasterLanguage: json['broadcaster_language'] as String,
+      broadcasterLogin: json['broadcaster_login'] as String,
+      displayName: json['display_name'] as String,
+      gameId: json['game_id'] as String,
+      gameName: json['game_name'] as String,
+      id: json['id'] as String,
+      isLive: json['is_live'] as bool,
+      tagIds:
+          (json['tag_ids'] as List<dynamic>).map((e) => e as String).toList(),
+      thumbnailUrl: json['thumbnail_url'] as String,
+      title: json['title'] as String,
+      startedAt: json['started_at'] as String,
+    );