started on an sqllite db

src/metadata/database.py

@@ -18,10 +18,10 @@ TEMP_DIR = get_temp_dir()
 DATABASE_FILE = "metadata.db"
 db_path = os.path.join(TEMP_DIR, DATABASE_FILE)
 
-sqliteConnection = sqlite3.connect(db_path)
+connection = sqlite3.connect(db_path)
-cursor = sqliteConnection.cursor()
+cursor = connection.cursor()
 
-def init_db(cursor, reset_anyways: bool = False):
+def init_db(cursor, connection, reset_anyways: bool = False):
     # check if db exists
     exists = True
     try:
@@ -43,7 +43,37 @@ def init_db(cursor, reset_anyways: bool = False):
             query = database_structure_file.read()
             cursor.executescript(query)
 
-init_db(cursor=cursor)
+init_db(cursor=cursor, connection=connection, reset_anyways=True)
+
+def add_artist(
+    musicbrainz_artistid: str,
+    artist: str = None
+):
+    query = "INSERT INTO artist (id, name) VALUES (?, ?);"
+    values = musicbrainz_artistid, artist
+
+    cursor.execute(query, values)
+    connection.commit()
+
+def add_release_group(
+    musicbrainz_releasegroupid: str,
+    artist_ids: list,
+    albumartist: str = None,
+    albumsort: int = None,
+    musicbrainz_albumtype: str = None,
+    compilation: str = None
+):
+    # add adjacency
+    adjacency_list = []
+    for artist_id in artist_ids:
+        adjacency_list.append((musicbrainz_releasegroupid, artist_id))
+    adjacency_values = tuple(adjacency_list)
+    adjacency_query = "INSERT INTO artist_release_group (artist_id, release_group_id) VALUES (?, ?);"
+    cursor.executemany(adjacency_query, adjacency_values)
+    connection.commit()
+
+    # add release group
+    query = "INSERT INTO release_group (id, albumartist, albumsort, musicbrainz_albumtype, compilation) VALUES (?, ?);"
 
 if __name__ == "__main__":
     pass

src/metadata/database_structure.sql

@@ -9,6 +9,7 @@ CREATE TABLE artist_release_group (
     artist_id TEXT NOT NULL,
     release_group_id TEXT NOT NULL
 );
+
 DROP TABLE IF EXISTS artist_track;
 CREATE TABLE artist_track (
     artist_id TEXT NOT NULL,
@@ -18,7 +19,10 @@ CREATE TABLE artist_track (
 DROP TABLE IF EXISTS release_group;
 CREATE TABLE release_group (
     id TEXT PRIMARY KEY NOT NULL,
-    name TEXT
+    albumartist TEXT,
+    albumsort INT,
+    musicbrainz_albumtype TEXT,
+    compilation TEXT
 );
 
 DROP TABLE IF EXISTS release_;

src/metadata/download.py

@@ -1,3 +1,4 @@
+import imp
 from typing import List
 
 import musicbrainzngs
@@ -8,6 +9,7 @@ from datetime import date
 import sqlite3
 
 from object_handeling import get_elem_from_obj, parse_music_brainz_date
+import database
 
 # I don't know if it would be feesable to set up my own mb instance
 # https://github.com/metabrainz/musicbrainz-docker
@@ -39,7 +41,9 @@ class Artist:
 
         self.artist = get_elem_from_obj(artist_data, ['name'])
 
-        logging.info(f"artist: {self}")
+        self.save()
+
+        # STARTING TO FETCH' RELEASE GROUPS. IMPORTANT: DON'T WRITE ANYTHING BESIDES THAT HERE
         if not new_release_groups:
             return
         # sort all release groups by date and add album sort to have them in chronological order.
@@ -55,6 +59,13 @@ class Artist:
                 albumsort=i + 1
             ))
 
+    def save(self):
+        logging.info(f"artist: {self}")
+        database.add_artist(
+            musicbrainz_artistid=self.musicbrainz_artistid,
+            artist=self.artist
+        )
+
     def __str__(self):
         newline = "\n"
         return f"id: {self.musicbrainz_artistid}\nname: {self.artist}\n{newline.join([str(release_group) for release_group in self.release_groups])}"
@@ -94,6 +105,8 @@ class ReleaseGroup:
         self.musicbrainz_albumtype = get_elem_from_obj(release_group_data, ['primary-type'])
         self.compilation = "1" if self.musicbrainz_albumtype == "Compilation" else None
 
+        self.save()
+
         if only_download_distinct_releases:
             self.append_distinct_releases(release_datas)
         else:
@@ -111,6 +124,16 @@ class ReleaseGroup:
         self.artists.append(new_artist)
         return new_artist
 
+    def save(self):
+        database.add_release_group(
+            musicbrainz_releasegroupid=self.musicbrainz_releasegroupid,
+            artist_ids=[artist.musicbrainz_artistid for artist in self.artists],
+            albumartist = self.albumartist,
+            albumsort = self.albumsort,
+            musicbrainz_albumtype = self.musicbrainz_albumtype,
+            compilation=self.compilation
+        )
+
     def append_release(self, release_data: dict):
         musicbrainz_albumid = get_elem_from_obj(release_data, ['id'])
         if musicbrainz_albumid is None: