Implement backend structure with Docker, database schema, and user authentication

backend/routes/app/database/users.database.js

@@ -0,0 +1,42 @@
+import mysql from "mysql2";
+import dotenv from "dotenv";
+dotenv.config();
+
+const pool = mysql
+  .createPool({
+    host: process.env.DB_HOST,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_NAME,
+  })
+  .promise();
+
+export const findUser = async (username, password) => {
+  const [result] = await pool.query(
+    "SELECT BIN_TO_UUID(uuid) AS uuid, username, first_name, last_name, email, is_admin, is_active, last_login FROM users WHERE username = ? AND password = ?;",
+    [username, password],
+  );
+
+  if (result.length <= 0) {
+    return { code: "e001" }; // username or password is wrong
+  }
+
+  if (!result[0].is_active) {
+    return { code: "e002" }; // user is deactivated
+  }
+
+  return { code: "s001", data: result[0] }; // user found
+};
+
+export const loginUser = async (username) => {
+  const [result] = await pool.query(
+    "UPDATE users SET last_login = NOW() WHERE username = ?;",
+    [username],
+  );
+
+  if (result.affectedRows > 0) {
+    return { code: "s002" };
+  } else {
+    return { code: "e003" };
+  }
+};