63 lines
2.4 KiB
Dart
63 lines
2.4 KiB
Dart
import '../../extensions/helpers_extension.dart';
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import '../../reverse_engineering/clients/closed_caption_client.dart' as re
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show ClosedCaptionClient;
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import '../../reverse_engineering/pages/watch_page.dart';
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import '../../reverse_engineering/youtube_http_client.dart';
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import '../videos.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(
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dynamic videoId,
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{@Deprecated('Not used anymore, use track.isAutoGenerated to see if a track is autogenerated or not.') // ignore: lines_longer_than_80_chars
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bool autoGenerated = false,
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List<ClosedCaptionFormat> formats = const [
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ClosedCaptionFormat.srv1,
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ClosedCaptionFormat.srv2,
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ClosedCaptionFormat.srv3,
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ClosedCaptionFormat.ttml,
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ClosedCaptionFormat.vtt
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]}) async {
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videoId = VideoId.fromString(videoId);
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var tracks = <ClosedCaptionTrackInfo>{};
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var watchPage = await WatchPage.get(_httpClient, (videoId as VideoId).value);
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var playerResponse = watchPage.playerResponse!;
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for (final track in playerResponse.closedCaptionTrack) {
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for (final ext in formats) {
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tracks.add(ClosedCaptionTrackInfo(
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Uri.parse(track.url)
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.replaceQueryParameters({'fmt': ext.formatCode}),
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Language(track.languageCode, track.languageName ?? ''),
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isAutoGenerated: track.autoGenerated,
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format: ext));
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}
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}
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return ClosedCaptionManifest(tracks);
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}
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/// Gets the actual closed caption track which is
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/// identified by the specified metadata.
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Future<ClosedCaptionTrack> get(ClosedCaptionTrackInfo trackInfo) async {
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var response = await re.ClosedCaptionClient.get(_httpClient, trackInfo.url);
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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.parts.map((f) => ClosedCaptionPart(f.text, f.offset))));
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return ClosedCaptionTrack(captions);
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}
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/// Returns the subtitles as a string.
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Future<String> getSubTitles(ClosedCaptionTrackInfo trackInfo) =>
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_httpClient.getString(trackInfo.url);
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}
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