first commit of refactor

backend/models/AlertRuleModel.js

@@ -0,0 +1,92 @@
+import pool from '../infra/database.js';
+
+/**
+ * Create new alertrule
+ * @param {number} addressId - Address ID
+ * @param {string} type - Alert type
+ * @param {string|null} threshold - Threshold value (nullable)
+ * @returns {Promise<Object>} Created alert rule object
+ */
+export async function create(addressId, type, threshold) {
+  const result = await pool.query(
+    `INSERT INTO alert_rules (address_id, type, threshold, enabled)
+     VALUES ($1, $2, $3, TRUE)
+     RETURNING id, address_id, type, threshold, enabled, created_at`,
+    [addressId, type, threshold]
+  );
+  return result.rows[0];
+}
+
+/**
+ * List alert rules by address ID
+ * @param {number} addressId - Address ID
+ * @returns {Promise<Array>} Array of alert rule objects
+ */
+export async function listByAddress(addressId) {
+  const result = await pool.query(
+    `SELECT id, address_id, type, threshold, enabled, created_at
+     FROM alert_rules
+     WHERE address_id = $1
+     ORDER BY created_at DESC`,
+    [addressId]
+  );
+  return result.rows;
+}
+
+/**
+ * Find alert rule by ID
+ * @param {number} id - Alert rule ID
+ * @param {string} user_id - Optional user ID for ownership verification
+ * @returns {Promise<Object|null>} Alert rule object or null if not found/not owned
+ */
+export async function findById(id, user_id = null) {
+  let query, params;
+  
+  if (user_id) {
+    // Verify ownership 
+    query = `SELECT ar.id, ar.address_id, ar.type, ar.threshold, ar.enabled, ar.created_at
+             FROM alert_rules ar
+             JOIN addresses a ON a.id = ar.address_id
+             WHERE ar.id = $1 AND a.user_id = $2`;
+    params = [id, user_id];
+  } else {
+    query = `SELECT id, address_id, type, threshold, enabled, created_at
+             FROM alert_rules
+             WHERE id = $1`;
+    params = [id];
+  }
+  
+  const result = await pool.query(query, params);
+  return result.rows[0] || null;
+}
+
+/**
+ * Update alert rule enabled status
+ * @param {number} id - Alert rule ID
+ * @param {boolean} enabled - Enabled status
+ * @returns {Promise<Object|null>} Updated alert rule or null if not found
+ */
+export async function updateEnabled(id, enabled) {
+  const result = await pool.query(
+    `UPDATE alert_rules
+     SET enabled = $2
+     WHERE id = $1
+     RETURNING id, address_id, type, threshold, enabled, created_at`,
+    [id, enabled]
+  );
+  return result.rows[0] || null;
+}
+
+/**
+ * Remove alert rule by ID
+ * @param {number} id - Alert rule ID
+ * @returns {Promise<boolean>} True if deleted, false if not found
+ */
+export async function remove(id) {
+  const result = await pool.query(
+    `DELETE FROM alert_rules WHERE id = $1`,
+    [id]
+  );
+  return result.rowCount > 0;
+}
+