refactor: Add ModLogService for managing moderation log channels

services/moderation/modlog_service.py

@@ -0,0 +1,31 @@
+from db.database import execute_query, select_query_one
+from typing import Optional
+
+
+class ModLogService:
+    def __init__(self):
+        pass
+
+    def set_modlog_channel(self, guild_id: int, channel_id: int) -> None:
+        query: str = """
+        INSERT INTO mod_log (guild_id, channel_id, is_enabled)
+        VALUES (%s, %s, TRUE)
+        ON DUPLICATE KEY UPDATE channel_id = VALUES(channel_id), is_enabled = TRUE, updated_at = CURRENT_TIMESTAMP
+        """
+        execute_query(query, (guild_id, channel_id))
+
+    def disable_modlog_channel(self, guild_id: int) -> None:
+        query: str = """
+        UPDATE mod_log
+        SET is_enabled = FALSE, updated_at = CURRENT_TIMESTAMP
+        WHERE guild_id = %s
+        """
+        execute_query(query, (guild_id,))
+
+    def fetch_modlog_channel_id(self, guild_id: int) -> Optional[dict]:
+        query: str = """
+        SELECT * FROM mod_log
+        WHERE guild_id = %s AND is_enabled = TRUE
+        """
+        result = select_query_one(query, (guild_id,))
+        return dict(result) if result else None