added control page

measurement/db.py

@@ -44,6 +44,27 @@ def init_ping_db(db_path=DB_PATH):
         pass  # column already exists
     conn.close()
 
+def init_settings_db(db_path=DB_PATH):
+    conn = sqlite3.connect(db_path)
+    conn.execute("CREATE TABLE IF NOT EXISTS settings (key TEXT PRIMARY KEY, value TEXT NOT NULL)")
+    conn.commit()
+    conn.close()
+
+def get_setting(key: str, db_path=DB_PATH) -> str | None:
+    conn = sqlite3.connect(db_path)
+    row = conn.execute("SELECT value FROM settings WHERE key = ?", (key,)).fetchone()
+    conn.close()
+    return row[0] if row else None
+
+def set_setting(key: str, value: str, db_path=DB_PATH):
+    conn = sqlite3.connect(db_path)
+    conn.execute(
+        "INSERT INTO settings (key, value) VALUES (?, ?) ON CONFLICT(key) DO UPDATE SET value = excluded.value",
+        (key, value)
+    )
+    conn.commit()
+    conn.close()
+
 def insert_ping_result(target_ip: str, success: bool, latency_ms: float | None, is_gateway: bool = False, db_path=DB_PATH):
     conn = sqlite3.connect(db_path)
     c = conn.cursor()