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Merge pull request #191 from LezdCS/feat/youtube-chat
Feat/youtube chat
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,189 @@ | ||
| import 'dart:async'; | ||
| import 'dart:convert'; | ||
| import 'package:html/dom.dart'; | ||
| import 'package:http/http.dart' as http; | ||
| import 'package:html/parser.dart' as parser; | ||
| import 'package:http/http.dart'; | ||
| import 'package:irllink/src/core/utils/globals.dart' as globals; | ||
| import 'package:irllink/src/domain/entities/chat/chat_message.dart'; | ||
|
|
||
| class YoutubeChat { | ||
| String videoId; | ||
|
|
||
| final StreamController _chatStreamController = StreamController.broadcast(); | ||
| Stream get chatStream => _chatStreamController.stream; | ||
|
|
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| YoutubeChat( | ||
| this.videoId, | ||
| ); | ||
|
|
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| void closeStream() { | ||
| _chatStreamController.close(); | ||
| } | ||
|
|
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| // Function to fetch the initial continuation token | ||
| Future<String?> fetchInitialContinuationToken() async { | ||
| var headers = { | ||
| 'accept': | ||
| 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7', | ||
| 'accept-language': 'en-US,en;q=0.9', | ||
| 'cache-control': 'no-cache', | ||
| 'pragma': 'no-cache', | ||
| 'user-agent': | ||
| 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36' | ||
| }; | ||
|
|
||
| String url = 'https://www.youtube.com/live_chat?is_popout=1&v=$videoId'; | ||
| try { | ||
| Response response = await http.get(Uri.parse(url), headers: headers); | ||
| Document document = parser.parse(response.body); | ||
| List<Element> scripts = document.getElementsByTagName('script'); | ||
| Element ytInitialDataScript = scripts | ||
| .firstWhere((script) => script.innerHtml.contains('ytInitialData')); | ||
| String scriptContent = ytInitialDataScript.innerHtml; | ||
| // Extracting ytInitialData JSON from the script tag | ||
| int dataStart = scriptContent.indexOf('{'); | ||
| int dataEnd = scriptContent.lastIndexOf('}') + 1; | ||
| String jsonString = scriptContent.substring(dataStart, dataEnd); | ||
| dynamic ytInitialData = json.decode(jsonString); | ||
|
|
||
| // Extract continuation token from ytInitialData | ||
| dynamic continuation = ytInitialData['contents']['liveChatRenderer'] | ||
| ['continuations'][0]['invalidationContinuationData']['continuation']; | ||
| return continuation; | ||
| } catch (error) { | ||
| globals.talker | ||
| ?.error('Error fetching initial continuation token: $error'); | ||
| return null; | ||
| } | ||
| } | ||
|
|
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| Future<String?> fetchChatMessages(String? continuationToken) async { | ||
| String body = json.encode({ | ||
| 'context': { | ||
| 'client': { | ||
| 'hl': 'en', | ||
| 'gl': 'JP', | ||
| 'remoteHost': '123.123.123.123', | ||
| 'userAgent': | ||
| 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36', | ||
| 'clientName': 'WEB', | ||
| 'clientVersion': '2.20240411.09.00', | ||
| }, | ||
| 'user': {'lockedSafetyMode': false} | ||
| }, | ||
| 'continuation': continuationToken | ||
| }); | ||
|
|
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| Map<String, Map<String, String>> options = { | ||
| 'headers': {'Content-Type': 'application/json'}, | ||
| }; | ||
|
|
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| const url = | ||
| 'https://www.youtube.com/youtubei/v1/live_chat/get_live_chat?prettyPrint=false'; | ||
|
|
||
| try { | ||
| Response response = await http.post(Uri.parse(url), | ||
| headers: options['headers'], body: body); | ||
| dynamic data = json.decode(response.body); | ||
|
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|
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| Iterable<dynamic>? messagesData = (data['continuationContents'] | ||
| ['liveChatContinuation']['actions'] as List?) | ||
| ?.map((action) => (action['addChatItemAction']['item'] | ||
| ['liveChatTextMessageRenderer'])); | ||
|
|
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| messagesData?.forEach((message) { | ||
| if(message['message'] == null) return; | ||
| List? messages = (message['message']['runs'] as List?) | ||
| ?.map((run) => run['text']) | ||
| .where((message) => message != null) | ||
| .toList(); | ||
| if(messages == null) return; | ||
| if(messages.isEmpty) return; | ||
| ChatMessage msg = ChatMessage.fromYoutube(message, messages, videoId); | ||
| _chatStreamController.add(msg); | ||
| }); | ||
|
|
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| dynamic newContinuationToken = data['continuationContents'] | ||
| ['liveChatContinuation']['continuations'][0] | ||
| ['invalidationContinuationData']['continuation']; | ||
| if (newContinuationToken == null) { | ||
| globals.talker?.info('No continuation token found, terminating.'); | ||
| return null; | ||
| } | ||
| return newContinuationToken; | ||
| } catch (error) { | ||
| globals.talker?.error('Error fetching chat messages: $error'); | ||
| return continuationToken; // Retry with the same token | ||
| } | ||
| } | ||
|
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| Future<void> startFetchingChat() async { | ||
| var continuationToken = await fetchInitialContinuationToken(); | ||
| if (continuationToken == null) { | ||
| globals.talker?.error('Failed to fetch initial continuation token.'); | ||
| return; | ||
| } | ||
|
|
||
| while (continuationToken != null) { | ||
| if(_chatStreamController.isClosed) return; | ||
| continuationToken = await fetchChatMessages(continuationToken); | ||
| await Future.delayed(const Duration(seconds: 5)); // 5-second pause | ||
| } | ||
| } | ||
| } | ||
|
|
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| Future<String?> getLiveVideoId(String channelURL) async { | ||
| // Send GET request to the YouTube channel's live streams page | ||
| var response = await http.get(Uri.parse(channelURL)); | ||
| if (response.statusCode != 200) { | ||
| globals.talker?.error( | ||
| 'Failed to retrieve the page. Status code: ${response.statusCode}'); | ||
| return null; | ||
| } | ||
|
|
||
| // Extract the ytInitialData JSON data from the page content | ||
| var match = RegExp(r'ytInitialData\s*=\s*({.*?});</script>') | ||
| .firstMatch(response.body); | ||
| if (match == null) { | ||
| globals.talker?.error('Failed to find ytInitialData in the page content.'); | ||
| return null; | ||
| } | ||
|
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| var ytInitialData = json.decode(match.group(1)!); | ||
|
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| // Navigate through the JSON data to find the live video ID | ||
| try { | ||
| var tabs = | ||
| ytInitialData['contents']['twoColumnBrowseResultsRenderer']['tabs']; | ||
| for (var tab in tabs) { | ||
| if (tab is Map && | ||
| tab['tabRenderer'] != null && | ||
| tab['tabRenderer']['selected'] != null && | ||
| tab['tabRenderer']['content'] != null) { | ||
| var contents = | ||
| tab['tabRenderer']['content']['richGridRenderer']['contents']; | ||
| for (var content in contents) { | ||
| if (content is Map && | ||
| content['richItemRenderer'] != null && | ||
| content['richItemRenderer']['content'] != null && | ||
| content['richItemRenderer']['content']['videoRenderer'] != null && | ||
| content['richItemRenderer']['content']['videoRenderer'] | ||
| ['upcomingEventData'] == | ||
| null) { | ||
| var videoId = content['richItemRenderer']['content'] | ||
| ['videoRenderer']['videoId']; | ||
| return videoId; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } catch (e) { | ||
| globals.talker?.error('Error parsing ytInitialData: $e'); | ||
| return null; | ||
| } | ||
|
|
||
| globals.talker?.info('No live video found.'); | ||
| return null; | ||
| } |
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