refactor: split telegram.ts into seperate files

lib/helpers.ts

@@ -107,3 +107,24 @@ export function parseRating(rating: string | number) {
   }
   return rating;
 }
+
+export async function convertOggToMp3(
+  oggData: ArrayBuffer,
+): Promise<Uint8Array> {
+  const ffmpeg = new Deno.Command("ffmpeg", {
+    args: ["-f", "ogg", "-i", "pipe:0", "-f", "mp3", "pipe:1"],
+    stdin: "piped",
+    stdout: "piped",
+    stderr: "null",
+  });
+
+  const process = ffmpeg.spawn();
+  const writer = process.stdin.getWriter();
+  await writer.write(new Uint8Array(oggData));
+  await writer.close();
+
+  const output = await process.output();
+  const { code } = await process.status;
+  if (code !== 0) throw new Error(`FFmpeg exited with code ${code}`);
+  return output.stdout;
+}