feat: add methods to update a user

Author: Victor

src/controllers/UserController.js

@@ -17,6 +17,21 @@ class UserController {
     async update(request, response) {
         const { id } = request.params;
         const { name, email } = request.body;
+        let result = await User.find({ where: { id: Number(id) } });
+        const user = result[0];
+
+        if (!user)
+            return response.status(400).json({ error: 'User not found!' });
+
+        result = await User.find({ where: { email } });
+        const userFoundByEmail = result[0];
+
+        if (userFoundByEmail && userFoundByEmail.id !== Number(id))
+            return response.status(400).json({ error: 'Email already exists!' });
+
+        await User.update({ name, email }, { where: { id } });
+
+        return response.status(204).send();
     }
 
     async delete(request, response) {

src/models/User.js

@@ -1,8 +1,21 @@
 import { connection as database } from '../config/database';
 
 class User {
-    async find() {
-        const query = 'SELECT * FROM users';
+    async find(filters) {
+        let query = 'SELECT * FROM users';
+
+        if (filters)
+            Object.keys(filters).forEach(filter => {
+                query += ` ${filter}`;
+
+                Object.keys(filters[filter]).forEach(field => {
+                    if (filters[filter][field] !== null)
+                        query += ` ${field} = '${filters[filter][field]}'`;
+                    else
+                        query += ` ${field} = null`;
+                });
+            });
+
         const result = await database.query(query);
         const users = result.rows;
 
@@ -34,8 +47,29 @@ class User {
         return user;
     }
 
-    async update() {
+    async update(data, filters) {
+        const fieldsToUpdate = [];
+
+        Object.keys(data).forEach(field => {
+            fieldsToUpdate.push(`${field} = '${data[field]}'`);
+        });
+
+        let query = `UPDATE users SET ${fieldsToUpdate.join(', ')}`;
+
+        if (filters)
+            Object.keys(filters).forEach(filter => {
+                query += ` ${filter.toUpperCase()}`;
+
+                Object.keys(filters[filter]).forEach(field => {
+                    if (filters[filter][field] !== null)
+                        query += ` ${field} = '${filters[filter][field]}'`;
+                    else
+                        query += ` ${field} = null`;
+                });
+            });
 
+        await database.query(query);
+        return;
     }
 
     async delete() {