Subtitle label conversion

package.json

@@ -79,6 +79,7 @@
     "cheerio": "^1.0.0-rc.12",
     "crypto-js": "^4.1.1",
     "form-data": "^4.0.0",
+    "iso-639-1": "^3.1.0",
     "nanoid": "^3.3.6",
     "node-fetch": "^2.7.0",
     "unpacker": "^1.0.1"

src/providers/captions.ts

@@ -1,3 +1,5 @@
+import ISO6391 from 'iso-639-1';
+
 export const captionTypes = {
   srt: 'srt',
   vtt: 'vtt',
@@ -17,3 +19,14 @@ export function getCaptionTypeFromUrl(url: string): CaptionType | null {
   if (!type) return null;
   return type;
 }
+
+export function labelToLanguageCode(label: string): string | null {
+  const code = ISO6391.getCode(label);
+  if (code.length === 0) return null;
+  return code;
+}
+
+export function isValidLanguageCode(code: string | null): boolean {
+  if (!code) return false;
+  return ISO6391.validate(code);
+}

src/providers/embeds/upcloud.ts

@@ -2,7 +2,7 @@ import crypto from 'crypto-js';
 
 import { flags } from '@/main/targets';
 import { makeEmbed } from '@/providers/base';
-import { Caption, getCaptionTypeFromUrl } from '@/providers/captions';
+import { Caption, getCaptionTypeFromUrl, labelToLanguageCode } from '@/providers/captions';
 
 const { AES, enc } = crypto;
 
@@ -102,8 +102,10 @@ export const upcloudScraper = makeEmbed({
       if (track.kind !== 'captions') return;
       const type = getCaptionTypeFromUrl(track.file);
       if (!type) return;
+      const language = labelToLanguageCode(track.label);
+      if (!language) return;
       captions.push({
-        language: track.label, // TODO Turn language name into ISO code
+        language,
         hasCorsRestrictions: false,
         type,
         url: track.file,

src/providers/sources/superstream/subtitles.ts

@@ -1,4 +1,4 @@
-import { Caption, getCaptionTypeFromUrl } from '@/providers/captions';
+import { Caption, getCaptionTypeFromUrl, isValidLanguageCode } from '@/providers/captions';
 import { sendRequest } from '@/providers/sources/superstream/sendRequest';
 import { ScrapeContext } from '@/utils/context';
 
@@ -42,6 +42,9 @@ export async function getSubtitles(
     const subtitleType = getCaptionTypeFromUrl(subtitle.file_path);
     if (!subtitleType) return;
 
+    const validCode = isValidLanguageCode(subtitle.lang);
+    if (!validCode) return;
+
     output.push({
       language: subtitle.lang,
       hasCorsRestrictions: true,