62 lines
1.7 KiB
Dart
62 lines
1.7 KiB
Dart
import 'package:html/dom.dart';
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import 'package:html/parser.dart' as parser;
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import '../../exceptions/exceptions.dart';
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import '../../retry.dart';
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import '../youtube_http_client.dart';
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class ChannelPage {
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final Document _root;
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bool get isOk => _root.querySelector('meta[property="og:url"]') != null;
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String get channelUrl =>
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_root.querySelector('meta[property="og:url"]')?.attributes['content'];
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String get channelId => channelId.substringAfter('channel/');
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String get channelTitle =>
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_root.querySelector('meta[property="og:title"]')?.attributes['content'];
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String get channelLogoUrl =>
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_root.querySelector('meta[property="og:image"]')?.attributes['content'];
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ChannelPage(this._root);
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ChannelPage.parse(String raw) : _root = parser.parse(raw);
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static Future<ChannelPage> get(YoutubeHttpClient httpClient, String id) {
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var url = 'https://www.youtube.com/channel/$id?hl=en';
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return retry(() async {
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var raw = await httpClient.getString(url);
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var result = ChannelPage.parse(raw);
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if (!result.isOk) {
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throw TransientFailureException('Channel page is broken');
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}
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return result;
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});
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}
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static Future<ChannelPage> getByUsername(
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YoutubeHttpClient httpClient, String username) {
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var url = 'https://www.youtube.com/user/$username?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 = ChannelPage.parse(raw);
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if (!result.isOk) {
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throw TransientFailureException('Channel page is broken');
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}
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return result;
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});
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}
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}
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extension on String {
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String substringAfter(String separator) =>
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substring(indexOf(separator) + length);
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}
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