code-api-web/src/modules/auth/Auth.controller.ts

import { RouteHandlerMethod } from 'fastify'
import { Uuid } from '@theoryofnekomata/uuid-buffer'
import { Controller } from 'src/packages/fastify-utils-theoryofnekomata'
import { UserService, UserServiceImpl } from 'src/modules/user'
import { LoginUserFormData } from 'src/modules/auth/models'
import { SessionService, SessionServiceImpl } from 'src/modules/auth/Session.service'
import {
	LoggedOutData,
	LoggedInData,
	UnableToLogInError,
	UnableToLogOutError,
} from 'src/modules/auth/responses'

export interface AuthController extends Controller<'logIn' | 'logOut'> {}

export class AuthControllerImpl implements AuthController {
	private readonly sessionService: SessionService
	private readonly userService: UserService

	constructor() {
		this.sessionService = new SessionServiceImpl()
		this.userService = new UserServiceImpl()
	}

	readonly logIn: RouteHandlerMethod = async (request, reply) => {
		const { username, password } = request.body as LoginUserFormData

		try {
			const existingUser = await this.userService.getFromCredentials({
				username,
				password,
			})

			const newSession = await this.sessionService.create({
				userId: existingUser.id,
			})

			reply.sendData(new LoggedInData(newSession))
		} catch (causeRaw) {
			const cause = causeRaw as Error
			throw new UnableToLogInError(
				'Authorization could not be performed on the credentials provided. Either try again later or ensure registration using the previous credentials.',
				{ cause },
			)
		}
	}

	readonly logOut: RouteHandlerMethod = async (request, reply) => {
		const sessionId = request.session?.id;
		if (sessionId) {
			try {
				await this.sessionService.expire(Uuid.from(sessionId))
				reply.sendData(new LoggedOutData())
				return
			} catch {
				// noop
			}
		}

		throw new UnableToLogOutError(
			'De-authorization could not be performed. Ensure session data is present and/or clear local data to carry out the operation.')
	}
}