[GolemBridge] Fix ordering of embeds

By going through all embeds in the JavaScript source.
Due to complexity with e.g. the Twitter embed, still only YouTube is
supported (now at the right placeholder place).

Test page (also with a Twitter embed): https://www.golem.de/news/stornierung-sam-altman-bekommt-anzahlung-fuer-tesla-roadster-nicht-zurueck-2511-201749.html
Previous test page with multiple YouTube embeds: https://www.golem.de/news/free-to-play-kostenlos-skaten-ballern-und-klicken-2510-201000.html

Author: Mynacol

bridges/GolemBridge.php

@@ -115,20 +115,29 @@ private function extractContent($page, $prevcontent)
 
         $article = $page->find('article', 0);
 
-        //built youtube iframes
+        // extract embeds from script tags (unfortunately no JSON)
+        $embedSrcs = [];
+        foreach ($page->find('script') as $script) {
+            // Ungreedy match to get precisely the snippet of one embed
+            if (preg_match_all('/type:\s*\"Embed(.*)urlPrivacy:/U', $script, $embeds)) {
+                foreach ($embeds[1] as $embed) {
+                    if (preg_match('/src:\s*\"([^\"]+)\"/', $embed, $src)) {
+                        $embedSrcs[] = $src[1];
+                    }
+                }
+            }
+        }
+        // inject the embed into the HTML placeholder
         $placeholders = $article->find('.go-embed-container');
         foreach (range(0, count($placeholders) - 1) as $i) {
-            foreach ($page->find('script') as $ytscript) {
-                if (preg_match_all('/(www.youtube.com.*?)\"/', $ytscript->innertext, $link)) {
-                    if (array_key_exists($i, $link[1]) && array_key_exists($i, $placeholders)) {
-                        $link = 'https://' . str_replace('\\', '', $link[1][$i]);
-                        $placeholders[$i]->innertext .= <<<EOT
-                            <iframe width="560" height="315" src="$link" title="YouTube video player" frameborder="0"
-                            allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
-                            referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>';
-                        EOT;
-                        break;
-                    }
+            if (array_key_exists($i, $embedSrcs)) {
+                $src = $embedSrcs[$i];
+                if (preg_match('/youtube(-nocookie)?\.com/', $src, $match)) {
+                    $placeholders[$i]->innertext = <<<EOT
+                    <iframe width="560" height="315" src="$src" title="YouTube video player" frameborder="0"
+                    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
+                    referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>';
+                    EOT;
                 }
             }
         }