feat: implement LinkExtractionService using HeadlessInAppWebView to intercept and extract video stream URLs

lib/features/sender/data/services/link_extraction_service.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+import 'dart:collection';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_inappwebview/flutter_inappwebview.dart';
 
@@ -6,57 +8,181 @@ abstract class ILinkExtractionService {
 }
 
 class LinkExtractionService implements ILinkExtractionService {
-  HeadlessInAppWebView? _headlessWebView;
+  
-
   @override
   Future<String?> extractVideoUrl(String pageUrl) async {
-    // 1. Check if it's already a video link
+    // 1. Zaten direkt bir video linkiyse hemen döndür
     if (_isVideoUrl(pageUrl)) return pageUrl;
 
-    // 2. Use Headless WebView to find the video
+    final completer = Completer<String?>();
-    String? foundUrl;
+    Timer? timeoutTimer;
     
-    _headlessWebView = HeadlessInAppWebView(
+    // HeadlessWebView'i yerel değişkene alıyoruz ki paralel çalışmalarda çakışmasın
+    HeadlessInAppWebView? headlessWebView;
+
+    // Temizlik ve Bellek Yönetimi
+    void cleanup() {
+      timeoutTimer?.cancel();
+      headlessWebView?.dispose();
+      headlessWebView = null;
+    }
+
+    // Bulunan URL'yi işleme
+    void handleFoundUrl(String url) {
+      if (!completer.isCompleted) {
+        debugPrint("EXTRACTION: SUCCESS! Found: $url");
+        cleanup();
+        completer.complete(url);
+      }
+    }
+
+    // Zaman aşımı (15 saniye)
+    timeoutTimer = Timer(const Duration(seconds: 15), () {
+      if (!completer.isCompleted) {
+        debugPrint("EXTRACTION: Timeout - no video URL found");
+        cleanup();
+        completer.complete(null);
+      }
+    });
+
+    // 2. UserScript: JS Kodunu Iframe'ler dahil tüm sayfalara DOM yüklenmeden ENJEKTE EDİYORUZ
+    final snifferScript = UserScript(
+      source: '''
+        (function() {
+          if (window.snifferInjected) return;
+          window.snifferInjected = true;
+
+          console.log("SNIFFER: Injected into frame: " + window.location.href);
+
+          function reportUrl(url) {
+            if (url && (url.includes('.m3u8') || url.includes('.mp4'))) {
+              window.flutter_inappwebview.callHandler('foundVideoUrl', url);
+            }
+          }
+
+          // 1. Override XMLHttpRequest
+          var oldOpen = XMLHttpRequest.prototype.open;
+          XMLHttpRequest.prototype.open = function(method, url) {
+            reportUrl(url);
+            return oldOpen.apply(this, arguments);
+          };
+
+          // 2. Override Fetch
+          var oldFetch = window.fetch;
+          window.fetch = function() {
+            var url = (arguments[0] instanceof Request) ? arguments[0].url : arguments[0];
+            if (url) reportUrl(url.toString());
+            return oldFetch.apply(this, arguments);
+          };
+
+          // 3. Oynatma Butonlarına Tıklama (Tüm iframe'lerde çalışacak)
+          window.clickPlayButtons = function() {
+            var selectors = [
+              '.play-that-video', '.play-button', '.vjs-big-play-button', 
+              '[aria-label="Play"]', '.ytp-large-play-button', '.play-icon', 
+              '#play', '.player-play', '.jw-display-icon-container',
+              'div[class*="play"]', 'button[class*="play"]', 'svg[class*="play"]'
+            ];
+            
+            selectors.forEach(function(sel) {
+              try {
+                document.querySelectorAll(sel).forEach(function(el) {
+                  if (el.offsetWidth > 0 || el.offsetHeight > 0) {
+                    el.click();
+                  }
+                });
+              } catch(e) {}
+            });
+
+            // Video etiketlerini direkt kontrol et
+            document.querySelectorAll('video').forEach(function(v) {
+              if (v.src && v.src.length > 5) reportUrl(v.src);
+              v.querySelectorAll('source').forEach(function(s) {
+                 if (s.src) reportUrl(s.src);
+              });
+            });
+          };
+
+          // HTML içindeki linkleri Regex ile tara
+          var scanInterval = setInterval(function() {
+            var html = document.documentElement.innerHTML;
+            var match = html.match(/https?:\\/\\/[^"'\\s<>]+\\.(m3u8|mp4)[^"'\\s<>]*/i);
+            if (match) reportUrl(match[0]);
+          }, 1500);
+
+        })();
+      ''',
+      injectionTime: UserScriptInjectionTime.AT_DOCUMENT_START, // Sayfa açılmadan hemen önce
+      forMainFrameOnly: false, // ÇOK ÖNEMLİ: Iframe'lerin içine girmesi için false olmalı!
+    );
+
+    headlessWebView = HeadlessInAppWebView(
       initialUrlRequest: URLRequest(url: WebUri(pageUrl)),
+      initialUserScripts: UnmodifiableListView<UserScript>([snifferScript]), // Scripti buradan veriyoruz
       initialSettings: InAppWebViewSettings(
         javaScriptEnabled: true,
         isInspectable: true,
+        mediaPlaybackRequiresUserGesture: false, // ÇOK ÖNEMLİ: Videoların tıklanmadan yüklenmesine izin ver
         mixedContentMode: MixedContentMode.MIXED_CONTENT_ALWAYS_ALLOW,
-        userAgent: "Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Mobile Safari/537.36",
+        supportMultipleWindows: false,
+        javaScriptCanOpenWindowsAutomatically: false,
+        useShouldInterceptRequest: true,
+        userAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
       ),
+      onWebViewCreated: (controller) {
+        // JS'den gelen sinyali dinle
+        controller.addJavaScriptHandler(handlerName: 'foundVideoUrl', callback: (args) {
+          if (args.isNotEmpty) {
+            handleFoundUrl(args[0].toString());
+          }
+        });
+      },
       onReceivedServerTrustAuthRequest: (controller, challenge) async {
         return ServerTrustAuthResponse(action: ServerTrustAuthResponseAction.PROCEED);
       },
-      onConsoleMessage: (controller, consoleMessage) {
+      shouldInterceptRequest: (controller, request) async {
-        debugPrint("WEBVIEW CONSOLE: ${consoleMessage.message}");
+        final url = request.url.toString();
-      },
-      onLoadError: (controller, url, code, message) {
-        debugPrint("WEBVIEW ERROR: $message ($code) for $url");
-      },
-      onLoadHttpError: (controller, url, statusCode, description) {
-        debugPrint("WEBVIEW HTTP ERROR: $description ($statusCode) for $url");
-      },
-      onLoadResource: (controller, resource) {
-        final url = resource.url.toString();
         if (_isVideoUrl(url)) {
-          foundUrl = url;
+          handleFoundUrl(url);
-          _headlessWebView?.dispose();
+        }
+        return null;
+      },
+      onLoadStop: (controller, url) async {
+        debugPrint("EXTRACTION: Page loaded: $url");
+        
+        // JS yüklenmiş mi diye kontrol et ve butonlara tıkla
+        for (int i = 0; i < 8; i++) {
+          if (completer.isCompleted) break;
+          await Future.delayed(const Duration(seconds: 1));
+          if (completer.isCompleted) break;
+          
+          try {
+            // WebView kapanmışsa hata fırlatmasını engellemek için try-catch
+            await controller.evaluateJavascript(source: "if(window.clickPlayButtons) window.clickPlayButtons();");
+          } catch (e) {
+            debugPrint("WebView disposed before javascript execution.");
+          }
         }
       },
     );
 
-    await _headlessWebView?.run();
+    await headlessWebView?.run();
-    
+    return completer.future;
-    // Wait for some time to catch resources
-    await Future.delayed(const Duration(seconds: 5));
-    
-    return foundUrl;
   }
 
   bool _isVideoUrl(String url) {
     final lower = url.toLowerCase();
-    return lower.contains('.m3u8') || 
+    if (lower.startsWith('data:') || lower.length < 10) return false;
-           lower.contains('.mp4') || 
+    
-           lower.contains('.mkv');
+    // Analitik veya reklam linklerini es geç
+    if (lower.contains('google.com') || lower.contains('gstatic.com') || lower.contains('analytics')) return false;
+
+    return lower.contains('.m3u8') ||
+        lower.contains('.mp4') ||
+        lower.contains('.mkv') ||
+        lower.contains('/hls/') ||
+        lower.contains('master.m3u8') ||
+        lower.contains('index.m3u8') ||
+        lower.contains('playlist.m3u8');
   }
-}
+}