api: flatten code directories, better filenames, remove old files

api/src/processing/services/facebook.js

@@ -0,0 +1,56 @@
+import { genericUserAgent } from "../../config.js";
+
+const headers = {
+    'User-Agent': genericUserAgent,
+    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8',
+    'Accept-Language': 'en-US,en;q=0.5',
+    'Sec-Fetch-Mode': 'navigate',
+    'Sec-Fetch-Site': 'none',
+}
+
+const resolveUrl = (url) => {
+    return fetch(url, { headers })
+        .then(r => {
+            if (r.headers.get('location')) {
+                return decodeURIComponent(r.headers.get('location'));
+            }
+            if (r.headers.get('link')) {
+                const linkMatch = r.headers.get('link').match(/<(.*?)\/>/);
+                return decodeURIComponent(linkMatch[1]);
+            }
+            return false;
+        })
+        .catch(() => false);
+}
+
+export default async function({ id, shareType, shortLink }) {
+    let url = `https://web.facebook.com/i/videos/${id}`;
+
+    if (shareType) url = `https://web.facebook.com/share/${shareType}/${id}`;
+    if (shortLink) url = await resolveUrl(`https://fb.watch/${shortLink}`);
+
+    const html = await fetch(url, { headers })
+        .then(r => r.text())
+        .catch(() => false);
+
+    if (!html) return { error: 'ErrorCouldntFetch' };
+
+    const urls = [];
+    const hd = html.match('"browser_native_hd_url":(".*?")');
+    const sd = html.match('"browser_native_sd_url":(".*?")');
+
+    if (hd?.[1]) urls.push(JSON.parse(hd[1]));
+    if (sd?.[1]) urls.push(JSON.parse(sd[1]));
+
+    if (!urls.length) {
+        return { error: 'ErrorEmptyDownload' };
+    }
+
+    const baseFilename = `facebook_${id || shortLink}`;
+
+    return {
+        urls: urls[0],
+        filename: `${baseFilename}.mp4`,
+        audioFilename: `${baseFilename}_audio`,
+    };
+}