Datenbank verbindung + User Admin angelegt

backend/datenbankverbindung.py

@@ -0,0 +1,47 @@
+import json
+import mysql.connector
+
+def lade_db_config(pfad='config/db_config.json'):
+    with open(pfad, 'r') as f:
+        return json.load(f)
+
+def speichere_db_config(daten, pfad='config/db_config.json'):
+    with open(pfad, 'w') as f:
+        json.dump(daten, f, indent=2)
+
+def teste_verbindung(db_config):
+    try:
+        conn = mysql.connector.connect(**db_config)
+        conn.close()
+        return True
+    except mysql.connector.Error as e:
+        print(f"[Fehler] DB-Verbindung fehlgeschlagen: {e}")
+        return False
+
+def initialisiere_admin_user(db_config):
+    import mysql.connector
+    conn = mysql.connector.connect(**db_config)
+    cursor = conn.cursor()
+
+    # Tabelle erstellen, falls nicht vorhanden
+    cursor.execute("""
+        CREATE TABLE IF NOT EXISTS users (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            username VARCHAR(255) UNIQUE NOT NULL,
+            password VARCHAR(255) NOT NULL,
+            role ENUM('user', 'admin') NOT NULL DEFAULT 'user'
+        )
+    """)
+
+    # Prüfen, ob admin existiert
+    cursor.execute("SELECT id FROM users WHERE username = 'admin'")
+    if not cursor.fetchone():
+        cursor.execute("""
+            INSERT INTO users (username, password, role)
+            VALUES (%s, %s, 'admin')
+        """, ('admin', 'admin'))
+        print("[INFO] Admin-Account wurde erstellt: admin / admin")
+
+    conn.commit()
+    cursor.close()
+    conn.close()