code-api-web/src/modules/auth/Password.service.ts

import { hash, genSalt, compare } from 'bcrypt'
import { AppError } from 'src/packages/fastify-compliant-http-errors'

export class PasswordNotEqualAssertError extends AppError {
}

export interface PasswordService {
	hash(password: string): Promise<string>;

	assertEqual(password: string, hashedPassword: string): Promise<void>;
}

export class PasswordServiceImpl implements PasswordService {
	constructor(private readonly saltRounds = 12) {
	}

	async hash(password: string): Promise<string> {
		const salt = await genSalt(this.saltRounds)
		return hash(password, salt)
	}

	async assertEqual(password: string, hashedPassword: string): Promise<void> {
		const result = await compare(password, hashedPassword)
		if (result) {
			return
		}
		throw new PasswordNotEqualAssertError()
	}
}