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

api/src/misc/utils.js

@@ -0,0 +1,67 @@
+const forbiddenCharsString = ['}', '{', '%', '>', '<', '^', ';', '`', '$', '"', "@", '='];
+
+export function metadataManager(obj) {
+    const keys = Object.keys(obj);
+    const tags = [
+        "album",
+        "copyright",
+        "title",
+        "artist",
+        "track",
+        "date"
+    ]
+    let commands = []
+
+    for (const i in keys) {
+        if (tags.includes(keys[i]))
+            commands.push('-metadata', `${keys[i]}=${obj[keys[i]]}`)
+        }
+    return commands;
+}
+
+export function cleanString(string) {
+    for (const i in forbiddenCharsString) {
+        string = string.replaceAll("/", "_")
+                       .replaceAll(forbiddenCharsString[i], '')
+    }
+    return string;
+}
+export function verifyLanguageCode(code) {
+    const langCode = String(code.slice(0, 2).toLowerCase());
+    if (RegExp(/[a-z]{2}/).test(code)) {
+        return langCode
+    }
+    return "en"
+}
+export function languageCode(req) {
+    if (req.header('Accept-Language')) {
+        return verifyLanguageCode(req.header('Accept-Language'))
+    }
+    return "en"
+}
+export function cleanHTML(html) {
+    let clean = html.replace(/ {4}/g, '');
+    clean = clean.replace(/\n/g, '');
+    return clean
+}
+
+export function getRedirectingURL(url) {
+    return fetch(url, { redirect: 'manual' }).then((r) => {
+        if ([301, 302, 303].includes(r.status) && r.headers.has('location'))
+            return r.headers.get('location');
+    }).catch(() => null);
+}
+
+export function merge(a, b) {
+    for (const k of Object.keys(b)) {
+        if (Array.isArray(b[k])) {
+            a[k] = [...(a[k] ?? []), ...b[k]];
+        } else if (typeof b[k] === 'object') {
+            a[k] = merge(a[k], b[k]);
+        } else {
+            a[k] = b[k];
+        }
+    }
+
+    return a;
+}