37 lines
1.1 KiB
Dart
37 lines
1.1 KiB
Dart
import 'package:html/dom.dart';
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import 'package:meta/meta.dart';
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import '../../../youtube_explode_dart.dart';
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import '../../extensions/helpers_extension.dart';
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import 'initial_data.dart';
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/// Generic class to handle the various youtube pages.
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abstract class YoutubePage<T extends InitialData> {
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@protected
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final Document? root;
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@protected
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late final T initialData = _defaultInitialData ?? _getInitialData();
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final T? _defaultInitialData;
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@protected
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final T Function(JsonMap)? initialDataBuilder;
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T _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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['var ytInitialData = ', 'window["ytInitialData"] ='],
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initialDataBuilder!,
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() => TransientFailureException(
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'Failed to retrieve initial data from $runtimeType, please report this to the project GitHub page.'));
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}
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YoutubePage(this.root, this.initialDataBuilder, [this._defaultInitialData])
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: assert((root != null && initialDataBuilder != null) ||
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_defaultInitialData != null);
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}
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