46 lines
1.8 KiB
Dart
46 lines
1.8 KiB
Dart
import '../../extensions/helpers_extension.dart';
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import '../../reverse_engineering/responses/closed_caption_track_response.dart'
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hide ClosedCaption, ClosedCaptionPart;
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import '../../reverse_engineering/responses/video_info_response.dart';
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import '../../reverse_engineering/youtube_http_client.dart';
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import '../videos.dart';
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import 'closed_caption.dart';
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import 'closed_caption_manifest.dart';
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import 'closed_caption_part.dart';
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import 'closed_caption_track.dart';
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import 'closed_caption_track_info.dart';
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import 'language.dart';
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/// Queries related to closed captions of YouTube videos.
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class ClosedCaptionClient {
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final YoutubeHttpClient _httpClient;
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/// Initializes an instance of [ClosedCaptionClient]
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ClosedCaptionClient(this._httpClient);
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/// Gets the manifest that contains information
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/// about available closed caption tracks in the specified video.
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Future<ClosedCaptionManifest> getManifest(VideoId videoId) async {
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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 tracks = playerResponse.closedCaptionTrack.map((track) =>
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ClosedCaptionTrackInfo(Uri.parse(track.url),
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Language(track.languageCode, track.languageName)));
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return ClosedCaptionManifest(tracks);
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}
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Future<ClosedCaptionTrack> get(ClosedCaptionTrackInfo trackInfo) async {
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var response = await ClosedCaptionTrackResponse.get(
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_httpClient, trackInfo.url.toString());
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var captions = response.closedCaptions
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.where((e) => !e.text.isNullOrWhiteSpace)
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.map((e) => ClosedCaption(e.text, e.offset, e.duration,
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e.getParts().map((f) => ClosedCaptionPart(f.text, f.offset))));
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return ClosedCaptionTrack(captions);
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}
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//TODO: Implement WriteToAsync and DownloadAsync
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}
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