updated some files

database/db_update.py

@@ -0,0 +1,43 @@
+#!/bin/python3
+
+import sqlite3
+from pathlib import Path
+
+
+DB_NAME = Path(__file__).parent / "calendar.db"
+
+
+try:
+    conn = sqlite3.connect(DB_NAME)
+    conn.execute("PRAGMA foreign_keys = ON;")
+    cur = conn.cursor()
+
+    # Migrations
+
+
+    conn.commit()
+    conn.close()
+
+    print("Database updated.")
+
+except sqlite3.Error as e:
+    print(f"Database error: {e}")
+
+    try:
+        conn.rollback()
+        conn.close()
+    except (NameError, sqlite3.Error):
+        pass
+
+    raise SystemExit(1)
+
+except Exception as e:
+    print(f"Error: {e}")
+
+    try:
+        conn.rollback()
+        conn.close()
+    except (NameError, sqlite3.Error):
+        pass
+
+    raise SystemExit(1)