From 78b5b31ac438d9d5b767e49e36dcc898fe34fc64 Mon Sep 17 00:00:00 2001
From: Marek <gitlab@marha.de>
Date: Sun, 5 Apr 2026 09:07:52 +0200
Subject: [PATCH] update

---
 browser_extension/background.js |  11 ++-
 browser_extension/content.js    | 146 +++++++++++++++++++++++++++++++-
 2 files changed, 153 insertions(+), 4 deletions(-)

diff --git a/browser_extension/background.js b/browser_extension/background.js
index 3160420..3e6d21b 100644
--- a/browser_extension/background.js
+++ b/browser_extension/background.js
@@ -1,2 +1,9 @@
-// TODO: Nachrichten vom Content Script empfangen und an Server senden
-console.log("Background Script geladen");
+const SERVER_URL = "http://localhost:8000/videos";
+
+browser.runtime.onMessage.addListener((video) => {
+  fetch(SERVER_URL, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(video),
+  }).catch(() => {});
+});
diff --git a/browser_extension/content.js b/browser_extension/content.js
index 59b1a62..f744a2b 100644
--- a/browser_extension/content.js
+++ b/browser_extension/content.js
@@ -1,2 +1,144 @@
-// TODO: YouTube-DOM auslesen und Videodaten extrahieren
-console.log("YouTube Video Erfasser geladen");
+console.log("[YT-Erfasser] Content Script geladen");
+
+const sentUrls = new Set();
+
+function getVideoId(url) {
+  const match = url.match(/[?&]v=([^&]+)/);
+  return match ? match[1] : null;
+}
+
+function getThumbnailUrl(videoId) {
+  return `https://img.youtube.com/vi/${videoId}/hqdefault.jpg`;
+}
+
+// --- DOM Extractors ---
+
+function extractFromLockupViewModel(element) {
+  const div = element.querySelector(".yt-lockup-view-model");
+  const classStr = div?.className || element.className || "";
+  const idMatch = classStr.match(/content-id-([\w-]+)/);
+  let videoId = idMatch ? idMatch[1] : null;
+
+  if (!videoId) {
+    const link = element.querySelector('a[href*="/watch?v="]');
+    if (link) videoId = getVideoId(link.href);
+  }
+  if (!videoId) return null;
+
+  const title =
+    element.querySelector("a.yt-lockup-metadata-view-model__title > span")
+      ?.textContent?.trim() || "";
+  if (!title) return null;
+
+  const youtuber =
+    element.querySelector('a.yt-core-attributed-string__link[href^="/@"]')
+      ?.textContent?.trim() || "Unbekannt";
+
+  return {
+    title,
+    youtuber,
+    thumbnail_url: getThumbnailUrl(videoId),
+    youtube_url: `https://www.youtube.com/watch?v=${videoId}`,
+  };
+}
+
+function extractFromVideoRenderer(element) {
+  const titleLink = element.querySelector("a#video-title");
+  if (!titleLink) return null;
+
+  const videoId = getVideoId(titleLink.href);
+  if (!videoId) return null;
+
+  const title =
+    titleLink.textContent?.trim() ||
+    element.querySelector("#video-title yt-formatted-string")
+      ?.textContent?.trim() || "";
+  if (!title) return null;
+
+  const youtuber =
+    element.querySelector("ytd-channel-name a")?.textContent?.trim() ||
+    element.querySelector(".ytd-channel-name a")?.textContent?.trim() ||
+    "Unbekannt";
+
+  return {
+    title,
+    youtuber,
+    thumbnail_url: getThumbnailUrl(videoId),
+    youtube_url: `https://www.youtube.com/watch?v=${videoId}`,
+  };
+}
+
+function extractVideoFromCard(element) {
+  const lockup = element.matches?.("yt-lockup-view-model")
+    ? element
+    : element.querySelector("yt-lockup-view-model");
+  if (lockup) return extractFromLockupViewModel(lockup);
+
+  const renderer = element.matches?.("ytd-video-renderer")
+    ? element
+    : element.querySelector("ytd-video-renderer");
+  if (renderer) return extractFromVideoRenderer(renderer);
+
+  return null;
+}
+
+// --- Processing ---
+
+function processCard(element) {
+  const video = extractVideoFromCard(element);
+  if (!video) return;
+  if (sentUrls.has(video.youtube_url)) return;
+  sentUrls.add(video.youtube_url);
+  console.log("[YT-Erfasser]", video.title, "-", video.youtuber);
+  browser.runtime.sendMessage(video);
+}
+
+function scanExistingCards() {
+  document
+    .querySelectorAll("yt-lockup-view-model, ytd-video-renderer")
+    .forEach((el) => processCard(el));
+}
+
+// --- MutationObserver (debounced) ---
+
+let pendingElements = [];
+let debounceTimer = null;
+
+function processPendingElements() {
+  const elements = pendingElements;
+  pendingElements = [];
+  debounceTimer = null;
+
+  for (const el of elements) {
+    if (el.matches?.("yt-lockup-view-model, ytd-video-renderer")) {
+      processCard(el);
+    }
+    el.querySelectorAll?.("yt-lockup-view-model, ytd-video-renderer").forEach(
+      (card) => processCard(card)
+    );
+  }
+}
+
+const observer = new MutationObserver((mutations) => {
+  for (const mutation of mutations) {
+    for (const node of mutation.addedNodes) {
+      if (node.nodeType !== Node.ELEMENT_NODE) continue;
+      pendingElements.push(node);
+    }
+  }
+  if (pendingElements.length > 0 && !debounceTimer) {
+    debounceTimer = setTimeout(processPendingElements, 250);
+  }
+});
+
+observer.observe(document.body, { childList: true, subtree: true });
+
+// --- SPA Navigation ---
+
+document.addEventListener("yt-navigate-finish", () => {
+  setTimeout(scanExistingCards, 500);
+});
+
+// --- Init ---
+
+scanExistingCards();