Added Python script which transfers songs, artists from GPM.

scripts/gpm_retrieve/.gitignore

@@ -0,0 +1,3 @@
+requirements.txt
+venv
+mobileclient.cred

scripts/gpm_retrieve/gpm_retrieve.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+
+from gmusicapi import Mobileclient
+import argparse
+import sys
+import requests
+
+creds_path=sys.path[0] + '/mobileclient.cred'
+
+def authenticate(api):
+    creds = api.perform_oauth(storage_filepath=creds_path, open_browser=False)
+
+def transferLibrary(gpm_api, mudbase_api):
+    songs = gpm_api.get_all_songs()
+    
+    # Determine all unique artists
+    artists = sorted(set([song['artist'] for song in songs]))
+
+    # Store the artist index of each song
+    songArtistIdxs = [ artists.index(song['artist']) for song in songs ]
+    
+    # Determine all unique albums per artist
+    artistAlbums = [ sorted(set([ song['album'] for song in songs if song['artist'] == artist ])) for artist in artists ]
+
+    # Create artists and store their mudbase Ids
+    artistMudbaseIds = []
+    for artist in artists:
+        response = requests.post(mudbase_api + '/artist/create', data = {
+            'name': artist
+        }).json()
+        print(f"Created artist \"{artist}\", response: {response}")
+        artistMudbaseIds.append(response['id'])
+
+    # Create songs
+    for song in songs:
+        artistMudbaseId = artistMudbaseIds[ artists.index(song['artist']) ]
+        response = requests.post(mudbase_api + '/song/create', data = {
+            'title': song['title'],
+            'artistId': artistMudbaseId
+        }).json()
+        print(f"Created song \"{song['title']}\" with artist ID {artistMudbaseId}, response: {response}")
+
+api = Mobileclient()
+
+parser = argparse.ArgumentParser(description="Import Google Music library into MudBase.")
+parser.add_argument('--authenticate', help="Generate credentials for authentication", action="store_true")
+parser.add_argument('mudbase_api', help="Address for the Mudbase back-end API")
+
+args = parser.parse_args()
+
+if args.authenticate:
+    authenticate(api)
+else:
+    api.oauth_login(Mobileclient.FROM_MAC_ADDRESS, oauth_credentials=creds_path)
+    transferLibrary(api, args.mudbase_api)

server/server.ts

@@ -30,14 +30,16 @@ app.post(api.CreateSongEndpoint, (req: any, res: any) => {
         res.sendStatus(400);
         return;
       }
-      const song = models.Song.create({
+      models.Song.create({
         title: reqObject.title,
         ArtistId: reqObject.artistId
-      });
-      const responseObject: api.CreateSongResponse = {
-        id: song.id
-      };
-      res.status(200).send(responseObject);
+      })
+      .then((song:any) => {
+        const responseObject: api.CreateSongResponse = {
+          id: song.id
+        };
+        res.status(200).send(responseObject);
+      })
     })
 });
 
@@ -71,11 +73,13 @@ app.post(api.CreateArtistEndpoint, (req: any, res: any) => {
     return;
   }
   const reqObject: api.CreateArtistRequest = req.body;
-  const artist = models.Artist.create(reqObject);
-  const responseObject: api.CreateArtistResponse = {
-    id: artist.id
-  };
-  res.status(200).send(responseObject);
+  models.Artist.create(reqObject)
+    .then((artist: any) => {
+      const responseObject: api.CreateArtistResponse = {
+        id: artist.id
+      };
+      res.status(200).send(responseObject);
+    })
 });
 
 app.get(api.ListArtistsEndpoint, (req: any, res: any) => {