87 lines
3.2 KiB
Dart
87 lines
3.2 KiB
Dart
import '../extensions/helpers_extension.dart';
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import '../playlists/playlists.dart';
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import '../reverse_engineering/responses/channel_upload_page.dart';
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import '../reverse_engineering/responses/responses.dart';
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import '../reverse_engineering/youtube_http_client.dart';
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import '../videos/video.dart';
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import '../videos/video_id.dart';
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import 'channel.dart';
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import 'channel_id.dart';
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import 'channel_video.dart';
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import 'username.dart';
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import 'video_sorting.dart';
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/// Queries related to YouTube channels.
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class ChannelClient {
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final YoutubeHttpClient _httpClient;
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/// Initializes an instance of [ChannelClient]
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ChannelClient(this._httpClient);
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/// Gets the metadata associated with the specified channel.
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/// [id] must be either a [ChannelId] or a string
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/// which is parsed to a [ChannelId]
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Future<Channel> get(dynamic id) async {
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id = ChannelId.fromString(id);
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var channelPage = await ChannelPage.get(_httpClient, id.value);
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return Channel(id, channelPage.channelTitle, channelPage.channelLogoUrl);
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}
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/// Gets the metadata associated with the channel of the specified user.
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/// [username] must be either a [Username] or a string
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/// which is parsed to a [Username]
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Future<Channel> getByUsername(dynamic username) async {
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username = Username.fromString(username);
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var channelPage =
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await ChannelPage.getByUsername(_httpClient, username.value);
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return Channel(ChannelId(channelPage.channelId), channelPage.channelTitle,
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channelPage.channelLogoUrl);
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}
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/// Gets the metadata associated with the channel
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/// that uploaded the specified video.
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Future<Channel> getByVideo(dynamic videoId) async {
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videoId = VideoId.fromString(videoId);
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var videoInfoResponse =
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await VideoInfoResponse.get(_httpClient, videoId.value);
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var playerResponse = videoInfoResponse.playerResponse;
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var channelId = playerResponse.videoChannelId;
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return get(ChannelId(channelId));
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}
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/// Enumerates videos uploaded by the specified channel.
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/// If you want a full list of uploads see [getUploadsFromPage]
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Stream<Video> getUploads(dynamic channelId) {
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channelId = ChannelId.fromString(channelId);
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var playlistId = 'UU${(channelId.value as String).substringAfter('UC')}';
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return PlaylistClient(_httpClient).getVideos(PlaylistId(playlistId));
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}
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/// Enumerates videos uploaded by the specified channel.
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/// This fetches thru all the uploads pages of the channel so it is
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/// recommended to use _.take_ (or any other method) to limit the
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/// search result. Every page has 30 results.
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///
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/// Note that this endpoint provides less info about each video
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/// (only the Title and VideoId).
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Stream<ChannelVideo> getUploadsFromPage(dynamic channelId,
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[VideoSorting videoSorting = VideoSorting.newest]) async* {
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channelId = ChannelId.fromString(channelId);
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var page = await ChannelUploadPage.get(
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_httpClient, channelId.value, videoSorting.code);
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yield* Stream.fromIterable(page.initialData.uploads);
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// ignore: literal_only_boolean_expressions
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while (true) {
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page = await page.nextPage(_httpClient);
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if (page == null) {
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return;
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}
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yield* Stream.fromIterable(page.initialData.uploads);
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}
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}
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}
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