Cleaning database if history not matching DB

This update brings improvements to the multiple scrobbles of a song functionality.

Script now compares the records returned from the YT API to the entries in the local DB. If a record exists in the DB but not in the API response it will be deleted from the DB.

We can assume that since we filter on "Today" that if a record does not exist at time x but then at future time y; it's a new scrobble.

This also keeps the local DB nice and tidy/performance improvements.

It also makes the script work regardless of time-zone of the user since we only modify the local DB based on the API response now.

Sidenote for people looking at this script for educational purpouses: Note that constructing the DELETE statement dynamically can be risky with a large number of records due to SQL injection risks and query length limits. In a production environment, you'd want to handle this more robustly, perhaps by using a temporary table or other safe means. Since we know this will run locally and we are not dealing with enterprise-size clusters of data here I did the query the quick and dirty way.

start.py

@@ -95,6 +95,41 @@ def execute(self):
         history = ytmusic.get_history()
         i = 0
         cursor = self.conn.cursor()
+
+        # Performing scrobbling of songs, cleaning up local DB if needed first, then adding/updating records to local DB and Last.FM
+        # Step 1: Collect all today's scrobbles
+        today_records = []
+
+        for index, item in enumerate(history):
+            if item["played"] == "Today":
+                record = {
+                    "artistName": item["artists"][0]["name"],
+                    "trackName": item["title"],
+                    "ts": self.formatted_date,
+                    "albumName": item["album"]["name"] if "album" in item and item["album"] is not None else None,
+                    "arrayPosition": index,
+                }
+                if record["artistName"].endswith(" - Topic"):
+                    continue
+                if record["albumName"] is None:
+                    record["albumName"] = record["trackName"]
+
+                today_records.append((record["trackName"], record["artistName"], record["albumName"]))
+
+        # Step 2: Delete all records in the database that are not in today's scrobbles
+        if today_records:
+            placeholders = ', '.join(['(?, ?, ?)'] * len(today_records))
+            flat_today_records = [item for sublist in today_records for item in sublist]
+            cursor.execute(f'''
+                DELETE FROM scrobbles 
+                WHERE (track_name, artist_name, album_name) NOT IN (
+                    {placeholders}
+                )
+            ''', flat_today_records)
+            self.conn.commit()
+
+        # Step 3: Insert or update today's scrobbles
+        i = 0  # Initialize i for scrobble timing
         for index, item in enumerate(history):
             if item["played"] == "Today":
                 record = {