Add sqlite db

app/database_updater.py

@@ -0,0 +1,54 @@
+import logging
+import os
+
+
+class DatabaseUpdater:
+    def __init__(self, connection):
+        self.connection = connection
+        self.current_version = self.get_db_version()
+        self.version_updates = {
+            1: self._update_to_v1,
+        }
+        self.max_version = max(self.version_updates.keys())
+        self.update_required = self.current_version < self.max_version
+        logging.info(f"Database version: {self.current_version}")
+
+    def get_db_version(self):
+        return self.connection.execute("PRAGMA user_version").fetchone()[0]
+
+    def update(self):
+        if not self.update_required:
+            return
+
+        logging.info(f"Updating database: {self.current_version} -> {self.max_version}")
+
+        dirname = os.path.dirname(__file__)
+        cursor = self.connection.cursor()
+        for version in range(self.current_version + 1, self.max_version + 1):
+            filename = os.path.join(dirname, f"db/v{version}.sql")
+            if not os.path.exists(filename):
+                raise Exception(
+                    f"Database update script for version {version} not found"
+                )
+
+            try:
+                with open(filename, "r") as file:
+                    sql = file.read()
+                    cursor.executescript(sql)
+            except Exception as e:
+                raise Exception(
+                    f"Failed to execute update script for version {version}: {e}"
+                )
+
+            method = self.version_updates[version]
+            if method is not None:
+                method(cursor)
+
+        cursor.execute("PRAGMA user_version = %d" % self.max_version)
+        self.connection.commit()
+        cursor.close()
+        self.current_version = self.get_db_version()
+
+    def _update_to_v1(self, cursor):
+        # TODO: migrate users and settings
+        print("Updating to v1")