background.js aktualisiert

2025-12-21 15:18:10 +00:00
parent fe3b313549
commit 8e640efa37
1 changed files with 95 additions and 98 deletions
--- a/background.js
+++ b/background.js
@@ -1,99 +1,96 @@
-// background.js
-// Service worker / background script: startet chrome.downloads.download und sendet Fortschritte an die Content-Tab.
-
-const downloadsMap = new Map(); // downloadId -> { tabId, filename }
-
-chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
-    if (!msg || !msg.action) {
-        sendResponse({ status: "unknown" });
-        return;
-    }
-
-    if (msg.action === "videoProgressCompleted") {
-        console.log('Video completed:', msg.videoId, 'name:', msg.name);
-        sendResponse({ status: "success" });
-        return;
-    }
-
-    if (msg.action === "startBackgroundDownload") {
-        const url = msg.url;
-        let filename = msg.filename || ('download_' + Date.now());
-
-        if (!url) {
-            sendResponse({ status: "error", message: "No URL provided" });
-            return;
-        }
-
-        try {
-            chrome.downloads.download(
-                {
-                    url: url,
-                    filename: filename,
-                    conflictAction: "uniquify",
-                    saveAs: false
-                },
-                downloadId => {
-                    if (chrome.runtime.lastError) {
-                        console.error('chrome.downloads.download error:', chrome.runtime.lastError.message);
-                        sendResponse({ status: "error", message: chrome.runtime.lastError.message });
-                    } else {
-                        const tabId = (sender && sender.tab && sender.tab.id) ? sender.tab.id : null;
-                        downloadsMap.set(downloadId, { tabId, filename });
-                        sendResponse({ status: "started", downloadId });
-                    }
-                }
-            );
-            return true;
-        } catch (e) {
-            console.error('Exception starting download', e);
-            sendResponse({ status: "error", message: String(e) });
-            return;
-        }
-    }
-
-    sendResponse({ status: "ok" });
-});
-
-// Listen for download changes and forward progress/state to the tab
-chrome.downloads.onChanged.addListener(delta => {
-    const info = downloadsMap.get(delta.id);
-    if (!info || !info.tabId) return;
-
-    if (delta.bytesReceived) {
-        chrome.downloads.search({ id: delta.id }, items => {
-            const item = items && items[0];
-            if (!item) return;
-
-            const received = item.bytesReceived || 0;
-            const total = item.totalBytes || 0;
-            const percent = total > 0 ? Math.round(100 * received / total) : null;
-
-            chrome.tabs.sendMessage(info.tabId, {
-                action: 'downloadProgress',
-                downloadId: delta.id,
-                bytesReceived: received,
-                totalBytes: total,
-                percent
-            }, () => { /* ignore response */ });
-        });
-    }
-
-    if (delta.state && delta.state.current === 'complete') {
-        chrome.tabs.sendMessage(info.tabId, {
-            action: 'downloadComplete',
-            downloadId: delta.id,
-            filename: info.filename
-        }, () => { /* ignore response */ });
-        downloadsMap.delete(delta.id);
-    }
-
-    if (delta.state && delta.state.current === 'interrupted') {
-        chrome.tabs.sendMessage(info.tabId, {
-            action: 'downloadFailed',
-            downloadId: delta.id,
-            filename: info.filename,
-            reason: delta.state && delta.state.current
-        }, () => { /* ignore response */ });
-        downloadsMap.delete(delta.id);
-    }
+const downloadsMap = new Map(); // downloadId -> { tabId, filename }
+
+chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {
+    if (!msg || !msg.action) {
+        sendResponse({ status: "unknown" });
+        return;
+    }
+
+    if (msg.action === "videoProgressCompleted") {
+        console.log('Video completed:', msg.videoId, 'name:', msg.name);
+        sendResponse({ status: "success" });
+        return;
+    }
+
+    if (msg.action === "startBackgroundDownload") {
+        const url = msg.url;
+        let filename = msg.filename || ('download_' + Date.now());
+
+        if (!url) {
+            sendResponse({ status: "error", message: "No URL provided" });
+            return;
+        }
+
+        try {
+            chrome.downloads.download(
+                {
+                    url: url,
+                    filename: filename,
+                    conflictAction: "uniquify",
+                    saveAs: false
+                },
+                downloadId => {
+                    if (chrome.runtime.lastError) {
+                        console.error('chrome.downloads.download error:', chrome.runtime.lastError.message);
+                        sendResponse({ status: "error", message: chrome.runtime.lastError.message });
+                    } else {
+                        const tabId = (sender && sender.tab && sender.tab.id) ? sender.tab.id : null;
+                        downloadsMap.set(downloadId, { tabId, filename });
+                        sendResponse({ status: "started", downloadId });
+                    }
+                }
+            );
+            return true;
+        } catch (e) {
+            console.error('Exception starting download', e);
+            sendResponse({ status: "error", message: String(e) });
+            return;
+        }
+    }
+
+    sendResponse({ status: "ok" });
+});
+
+// Listen for download changes and forward progress/state to the tab
+chrome.downloads.onChanged.addListener(delta => {
+    const info = downloadsMap.get(delta.id);
+    if (!info || !info.tabId) return;
+
+    if (delta.bytesReceived) {
+        chrome.downloads.search({ id: delta.id }, items => {
+            const item = items && items[0];
+            if (!item) return;
+
+            const received = item.bytesReceived || 0;
+            const total = item.totalBytes || 0;
+            const percent = total > 0 ? Math.round(100 * received / total) : null;
+
+            chrome.tabs.sendMessage(info.tabId, {
+                action: 'downloadProgress',
+                downloadId: delta.id,
+                bytesReceived: received,
+                totalBytes: total,
+                percent
+            }, () => { /* ignore response */ });
+        });
+    }
+
+    if (delta.state && delta.state.current === 'complete') {
+        chrome.tabs.sendMessage(info.tabId, {
+            action: 'downloadComplete',
+            downloadId: delta.id,
+            filename: info.filename
+        }, () => { /* ignore response */ });
+        downloadsMap.delete(delta.id);
+    }
+
+    if (delta.state && delta.state.current === 'interrupted') {
+        chrome.tabs.sendMessage(info.tabId, {
+            action: 'downloadFailed',
+            downloadId: delta.id,
+            filename: info.filename,
+            reason: delta.state && delta.state.current
+        }, () => { /* ignore response */ });
+        downloadsMap.delete(delta.id);
+    }
 });