[server] fix playlist methods

- deepcopy playlists in get_all_playlists

server/app/api/playlist.py

@@ -1,22 +1,28 @@
 """
 Contains all the playlist routes.
 """
-
+from copy import deepcopy
+from typing import List
 from flask import Blueprint, request
 from app import instances, api
 from app.lib import playlistlib
 from app import models
+from app import exceptions
 
 playlist_bp = Blueprint("playlist", __name__, url_prefix="/")
 
+PlaylistExists = exceptions.PlaylistExists
+TrackExistsInPlaylist = exceptions.TrackExistsInPlaylist
+
 
 @playlist_bp.route("/playlists", methods=["GET"])
 def get_all_playlists():
+    ppp = deepcopy(api.PLAYLISTS)
     playlists = []
 
-    for playlist in api.PLAYLISTS:
-        playlist.tracks = []
-        playlists.append(playlist)
+    for pl in ppp:
+        pl.tracks = []
+        playlists.append(pl)
 
     return {"data": playlists}
 
@@ -30,24 +36,28 @@ def create_playlist():
         p_in_db = instances.playlist_instance.get_playlist_by_name(playlist["name"])
 
         if p_in_db:
-            raise Exception("Playlist already exists.")
-    except Exception as e:
+            raise PlaylistExists("Playlist already exists.")
+    except PlaylistExists as e:
         return {"error": str(e)}, 409
 
     upsert_id = instances.playlist_instance.insert_playlist(playlist)
     p = instances.playlist_instance.get_playlist_by_id(upsert_id)
+    pp = models.Playlist(p)
 
-    api.PLAYLISTS.append(models.Playlist(p))
+    api.PLAYLISTS.append(pp)
 
-    return {"msg": "Playlist created successfully."}, 201
+    return {"playlist": pp}, 201
 
 
 @playlist_bp.route("/playlist/<playlist_id>/add", methods=["POST"])
 def add_track_to_playlist(playlist_id):
     data = request.get_json()
 
-    pid = data["playlist"]
     trackid = data["track"]
 
-    playlistlib.add_track(pid, trackid)
-    return 200
+    try:
+        playlistlib.add_track(playlist_id, trackid)
+    except TrackExistsInPlaylist as e:
+        return {"error": str(e)}, 409
+
+    return {"msg": "I think It's done"}, 200