first commit of refactor

backend/models/AddressModel.js

@@ -0,0 +1,84 @@
+import pool from '../infra/database.js';
+
+/**
+ * Create a new address
+ * @param {string} user_id - Firebase user ID
+ * @param {string} address - Ethereum address
+ * @param {string|null} label - Optional label
+ * @returns {Promise<Object>} Created address object
+ */
+export async function create(user_id, address, label) {
+  const result = await pool.query(
+    `INSERT INTO addresses (user_id, address, label)
+     VALUES ($1, $2, $3)
+     RETURNING id, user_id, address, label, created_at`,
+    [user_id, address, label]
+  );
+  return result.rows[0];
+}
+
+/**
+ * List all addresses for a specific user
+ * @param {string} user_id - Firebase user ID
+ * @returns {Promise<Array>} Array of address objects
+ */
+export async function listByUser(user_id) {
+  const result = await pool.query(
+    `SELECT id, address, label, created_at
+     FROM addresses
+     WHERE user_id = $1
+     ORDER BY created_at DESC`,
+    [user_id]
+  );
+  return result.rows;
+}
+
+/**
+ * List all addresses (for system use only, e.g., poller)
+ * @returns {Promise<Array>} Array of address objects
+ */
+export async function list() {
+  const result = await pool.query(
+    `SELECT id, user_id, address, label, created_at
+     FROM addresses
+     ORDER BY created_at DESC`
+  );
+  return result.rows;
+}
+
+/**
+ * Find address by ID (for specific user)
+ * @param {number} id - Address ID
+ * @param {string} user_id - Firebase user ID (for ownership verification)
+ * @returns {Promise<Object|null>} Address object or null if not found or not owned by user
+ */
+export async function findById(id, user_id = null) {
+  const query = user_id
+    ? `SELECT id, user_id, address, label, created_at
+       FROM addresses
+       WHERE id = $1 AND user_id = $2`
+    : `SELECT id, user_id, address, label, created_at
+       FROM addresses
+       WHERE id = $1`;
+  
+  const params = user_id ? [id, user_id] : [id];
+  
+  const result = await pool.query(query, params);
+  return result.rows[0] || null;
+}
+
+/**
+ * Remove address by ID (for specific user)
+ * @param {number} id - Address ID
+ * @param {string} user_id - Firebase user ID (for ownership verification)
+ * @returns {Promise<boolean>} True if deleted, false if not found or not owned by user
+ */
+export async function remove(id, user_id) {
+  const result = await pool.query(
+    `DELETE FROM addresses 
+     WHERE id = $1 AND user_id = $2`,
+    [id, user_id]
+  );
+  return result.rowCount > 0;
+}
+