code-api-web/src/modules/user/User.service.ts

import { PrismaClient } from '@prisma/client'
import {CreateUserData, PublicUser, User} from 'src/modules/user/models';
import { PasswordService, PasswordServiceImpl, LoginUserFormData } from 'src/modules/auth'
import { Uuid } from '@theoryofnekomata/uuid-buffer';
import { notFoundFactory } from '../../packages/prisma-error-utils';
import {UserNotFoundError} from './responses';

export interface UserService {
	create(data: CreateUserData): Promise<PublicUser>;

	getFromCredentials(args: LoginUserFormData): Promise<PublicUser>;

	getFromId(id: User['id']): Promise<PublicUser>;
}

export class UserServiceImpl implements UserService {
	private readonly prismaClient: PrismaClient
	private readonly passwordService: PasswordService

	constructor() {
		this.prismaClient = new PrismaClient()
		this.passwordService = new PasswordServiceImpl()
	}

	async create(data: CreateUserData): Promise<PublicUser> {
		const newUser = await this.prismaClient.user.create({
			data: {
				...data,
				id: Uuid.v4(),
				password: await this.passwordService.hash(data.password),
			},
			select: {
				id: true,
				username: true,
				password: false,
			},
		})

		return {
			...newUser,
			id: Uuid.from(newUser.id),
		}
	}

	async getFromCredentials(args: LoginUserFormData): Promise<PublicUser> {
		const { password: hashedPassword, ...existingUser } = await this.prismaClient.user.findUnique({
			where: {
				username: args.username,
			},
			rejectOnNotFound: notFoundFactory(UserNotFoundError),
		})
		await this.passwordService.assertEqual(args.password, hashedPassword)

		return {
			...existingUser,
			id: Uuid.from(existingUser.id),
		}
	}

	async getFromId(id: User['id']): Promise<PublicUser> {
		const existingUser = await this.prismaClient.user.findUnique({
			where: {
				id,
			},
			select: {
				id: true,
				username: true,
			},
			rejectOnNotFound: notFoundFactory(UserNotFoundError),
		});

		return {
			...existingUser,
			id: Uuid.from(existingUser.id),
		};
	}
}