feat: initial project structure (Model Project) - Backend + Multi-Frontend + Docker

backend/models/Admin.js

@@ -0,0 +1,51 @@
+'use strict'
+
+const { execute, queryOne, query } = require('../database/postgres')
+
+class Admin {
+  static findAll() {
+    return query('SELECT id, username, nome, email, telefone, created_at FROM admins ORDER BY id ASC')
+  }
+
+  static findById(id) {
+    return queryOne('SELECT * FROM admins WHERE id = $1', [id])
+  }
+
+  static findByUsername(username) {
+    return queryOne('SELECT * FROM admins WHERE username = $1', [username])
+  }
+
+  static create(username, password_hash) {
+    return execute(
+      'INSERT INTO admins (username, password_hash) VALUES ($1, $2) RETURNING id',
+      [username, password_hash]
+    )
+  }
+
+  static update(id, data) {
+    const fields = []
+    const values = []
+    let i = 1
+
+    if (data.username)      { fields.push(`username = $${i++}`);      values.push(data.username) }
+    if (data.password_hash) { fields.push(`password_hash = $${i++}`); values.push(data.password_hash) }
+    if ('nome'     in data) { fields.push(`nome = $${i++}`);     values.push(data.nome) }
+    if ('email'    in data) { fields.push(`email = $${i++}`);    values.push(data.email) }
+    if ('telefone' in data) { fields.push(`telefone = $${i++}`); values.push(data.telefone) }
+
+    if (!fields.length) return Promise.resolve({ rowCount: 0 })
+    values.push(id)
+    return execute(`UPDATE admins SET ${fields.join(', ')} WHERE id = $${i}`, values)
+  }
+
+  static delete(id) {
+    return execute('DELETE FROM admins WHERE id = $1', [id])
+  }
+
+  static async count() {
+    const row = await queryOne('SELECT COUNT(*) as total FROM admins')
+    return parseInt(row?.total || 0)
+  }
+}
+
+module.exports = Admin