first commit of refactor

backend/models/NotificationConfigModel.js

@@ -0,0 +1,86 @@
+import pool from '../infra/database.js';
+
+/**
+ * Get notification config for a user
+ * @param {string} user_id - Firebase user ID
+ * @returns {Promise<Object|null>} Notification config or null if not set
+ */
+export async function getConfig(user_id) {
+  const result = await pool.query(
+    `SELECT user_id, discord_webhook_url, telegram_chat_id, telegram_bot_token, 
+            email, notification_enabled, created_at, updated_at
+     FROM user_notification_configs
+     WHERE user_id = $1`,
+    [user_id]
+  );
+  
+  return result.rows[0] || null;
+}
+
+/**
+ * Create or update notification config for a user
+ * @param {string} user_id - Firebase user ID
+ * @param {Object} config - Notification configuration
+ * @param {string} [config.discord_webhook_url] - Discord webhook URL
+ * @param {string} [config.telegram_chat_id] - Telegram chat ID
+ * @param {string} [config.email] - Email address
+ * @param {boolean} [config.notification_enabled] - Enable/disable notifications
+ * @returns {Promise<Object>} Updated config
+ */
+export async function upsertConfig(user_id, config) {
+  const {
+    discord_webhook_url,
+    telegram_chat_id,
+    telegram_bot_token,
+    email,
+    notification_enabled = true
+  } = config;
+
+  const result = await pool.query(
+    `INSERT INTO user_notification_configs 
+      (user_id, discord_webhook_url, telegram_chat_id, telegram_bot_token, email, notification_enabled, updated_at)
+     VALUES ($1, $2, $3, $4, $5, $6, NOW())
+     ON CONFLICT (user_id)
+     DO UPDATE SET
+       discord_webhook_url = COALESCE($2, user_notification_configs.discord_webhook_url),
+       telegram_chat_id = COALESCE($3, user_notification_configs.telegram_chat_id),
+       telegram_bot_token = COALESCE($4, user_notification_configs.telegram_bot_token),
+       email = COALESCE($5, user_notification_configs.email),
+       notification_enabled = $6,
+       updated_at = NOW()
+     RETURNING user_id, discord_webhook_url, telegram_chat_id, telegram_bot_token, 
+               email, notification_enabled, created_at, updated_at`,
+    [user_id, discord_webhook_url, telegram_chat_id, telegram_bot_token, email, notification_enabled]
+  );
+  
+  return result.rows[0];
+}
+
+/**
+ * Delete notification config for a user
+ * @param {string} user_id - Firebase user ID
+ * @returns {Promise<boolean>} True if deleted, false if not found
+ */
+export async function remove(user_id) {
+  const result = await pool.query(
+    `DELETE FROM user_notification_configs WHERE user_id = $1`,
+    [user_id]
+  );
+  
+  return result.rowCount > 0;
+}
+
+/**
+ * Get all users with notifications enabled (for system use)
+ * @returns {Promise<Array>} Array of user configs
+ */
+export async function listEnabled() {
+  const result = await pool.query(
+    `SELECT user_id, discord_webhook_url, telegram_chat_id, email
+     FROM user_notification_configs
+     WHERE notification_enabled = TRUE`
+  );
+  
+  return result.rows;
+}
+