Add youtube info download

backend/src/song_fetch.py

@@ -21,9 +21,7 @@ def lastfm_search(query: str) -> tuple[str, str]:
     return track_info["name"], track_info["artist"]
 
 
-def lastfm_getinfo(
-    name: str, artist: str
-) -> tuple[str, str, str, str, list[str]]:  # ( id, image_id, tags )
+def lastfm_getinfo(name: str, artist: str) -> tuple[str, str, str, str, list[str]]:  # ( id, image_id, tags )
     response = requests.get(
         url="https://ws.audioscrobbler.com/2.0/?method=track.getInfo&format=json",
         params={
@@ -44,20 +42,23 @@ def lastfm_getinfo(
     )
 
 
-print(yt_dlp, flush=True)
+def download_song_mp3(name: str, artist: str) -> tuple[str, str] | None:  # ( id, audio )
+    ydl_opts = {
+        "format": "bestaudio",
+        "default_search": "ytsearch1",
+        "outtmpl": "%(title)s.%(ext)s",
+        "skip_download": True,
+    }
 
-# # def get_yt_mp3link(name: str, artist: str) -> str: ...
-# #     os.popen("/yt-dlp ")
+    with yt_dlp.YoutubeDL(ydl_opts) as ydl:
+        info = ydl.extract_info(f"{name!r} - {artist!r}", download=False)
 
-# # /yt-dlp/yt-dlp.sh "ytsearch1:Never gonna give you up" --get-url -f "ba"
+    first_entry = info["entries"][0]
 
-# import json
+    video_id = first_entry["id"]
 
-# print(json.dumps(lastfm_getinfo(*lastfm_search("money")), indent=2))
-# exit(1)
+    for fmt in first_entry["formats"]:
+        if "acodec" in fmt and fmt["acodec"] != "none":
+            return video_id, fmt["url"]
 
-
-# # def
-
-
-# ## query ==> lastfm  ==> list of songs ==> take first ==> request song info ==> get YT link ==>  save in DB  ==>
+    return None