138 lines
3.9 KiB
Dart
138 lines
3.9 KiB
Dart
import 'package:collection/collection.dart';
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import 'package:html/dom.dart';
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import 'package:html/parser.dart' as parser;
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import '../../../youtube_explode_dart.dart';
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import '../../exceptions/exceptions.dart';
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import '../../extensions/helpers_extension.dart';
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import '../../retry.dart';
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import '../youtube_http_client.dart';
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///
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class ChannelAboutPage {
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final Document _root;
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///
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late final _InitialData initialData = _getInitialData();
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_InitialData _getInitialData() {
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final scriptText = _root
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.querySelectorAll('script')
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.map((e) => e.text)
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.toList(growable: false);
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return scriptText.extractGenericData(
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(obj) => _InitialData(obj),
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() => TransientFailureException(
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'Failed to retrieve initial data from the channel about page, please report this to the project GitHub page.'));
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}
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///
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String get description => initialData.description;
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///
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ChannelAboutPage(this._root);
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///
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ChannelAboutPage.parse(String raw) : _root = parser.parse(raw);
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///
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static Future<ChannelAboutPage> get(YoutubeHttpClient httpClient, String id) {
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var url = 'https://www.youtube.com/channel/$id/about?hl=en';
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return retry(() async {
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var raw = await httpClient.getString(url);
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var result = ChannelAboutPage.parse(raw);
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return result;
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});
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}
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///
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static Future<ChannelAboutPage> getByUsername(
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YoutubeHttpClient httpClient, String username) {
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var url = 'https://www.youtube.com/user/$username/about?hl=en';
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return retry(() async {
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var raw = await httpClient.getString(url);
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var result = ChannelAboutPage.parse(raw);
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return result;
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});
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}
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}
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final _urlExp = RegExp(r'q=([^=]*)$');
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class _InitialData {
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// Json parsed map
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final Map<String, dynamic> root;
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_InitialData(this.root);
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late final Map<String, dynamic> content = _getContentContext();
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Map<String, dynamic> _getContentContext() {
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return root
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.get('contents')!
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.get('twoColumnBrowseResultsRenderer')!
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.getList('tabs')!
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.firstWhere((e) => e['tabRenderer']?['content'] != null)
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.get('tabRenderer')!
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.get('content')!
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.get('sectionListRenderer')!
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.getList('contents')!
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.firstOrNull!
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.get('itemSectionRenderer')!
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.getList('contents')!
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.firstOrNull!
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.get('channelAboutFullMetadataRenderer')!;
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}
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late final String description =
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content.get('description')!.getT<String>('simpleText')!;
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late final List<ChannelLink> channelLinks = content
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.getList('primaryLinks')!
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.map((e) => ChannelLink(
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e.get('title')?.getT<String>('simpleText') ?? '',
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extractUrl(e
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.get('navigationEndpoint')
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?.get('commandMetadata')
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?.get('webCommandMetadata')
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?.getT<String>('url') ??
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e
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.get('navigationEndpoint')
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?.get('urlEndpoint')
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?.getT<String>('url') ??
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''),
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Uri.parse(e
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.get('icon')
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?.getList('thumbnails')
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?.firstOrNull
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?.getT<String>('url') ??
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'')))
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.toList();
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late final int viewCount = int.parse(content
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.get('viewCountText')!
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.getT<String>('simpleText')!
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.stripNonDigits());
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late final String joinDate =
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content.get('joinedDateText')!.getList('runs')![1].getT<String>('text')!;
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late final String title = content.get('title')!.getT<String>('simpleText')!;
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late final List<Map<String, dynamic>> avatar =
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content.get('avatar')!.getList('thumbnails')!;
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late final String country =
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content.get('country')!.getT<String>('simpleText')!;
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String parseRuns(List<dynamic>? runs) =>
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runs?.map((e) => e.text).join() ?? '';
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Uri extractUrl(String text) =>
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Uri.parse(Uri.decodeFull(_urlExp.firstMatch(text)?.group(1) ?? ''));
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}
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