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ConflictException,
HttpException,
Injectable,
InternalServerErrorException,
Logger,
NotFoundException,
ServiceUnavailableException,
UnauthorizedException,
} from '@nestjs/common'
import { ConfigService } from '@nestjs/config'
import { JwtService } from '@nestjs/jwt'
import { compare } from 'bcrypt'
import { ObjectId } from 'mongoose'
import { MailData } from '../db/entities/mail-event.entity'
import { User } from '../db/entities/users.entity'
import { UserDBService } from '../db/services/user.service'
import {
MailTemplateContent,
MailTemplates,
PasswordResetMailData,
VerifyMailData,
} from '../mail/interfaces/mail.interface'
import { MailScheduleService } from '../mail/services/scheduler.service'
import { StripeService } from '../payments/services/stripe.service'
import { JWTPayload } from '../shared/interfaces/jwt-payload.interface'
import { LoginDTO } from './dtos/login.dto'
import { RegisterDTO } from './dtos/register.dto'
import { PasswordResetJWTPayload } from './interfaces/pw-reset-jwt-payload.interface'
import { RefreshJWTPayload } from './interfaces/refresh-jwt-payload.interface'
import { VerifyJWTPayload } from './interfaces/verify-jwt-payload.interface'
import { TokenResponse } from './responses/token.response'
@Injectable()
export class AuthService {
private readonly logger = new Logger(AuthService.name)
constructor(
private readonly userService: UserDBService,
private readonly jwtService: JwtService,
private readonly configService: ConfigService,
private readonly mailService: MailScheduleService,
private readonly stripeService: StripeService,
) {}
/**
* @description Initiate user registration
*/
async register(body: RegisterDTO): Promise<TokenResponse> {
// hash password
const newUser = await this.userService.insertUser(body)
/* istanbul ignore if */
if (!newUser) {
this.logger.error(
'An unexpected error occured. Creation of user did not fail but also did not return user',
)
// All conflict related exceptions are thrown within the userService
// This is only a safeguard that should never be reached (in theory)
throw new InternalServerErrorException()
}
try {
await this.sendEmailVerify(newUser)
} catch (error) {
this.logger.warn(
`Sending verify mail failed due to an error. User registration continued anyway ${error}`,
)
}
return await this.getAuthPayload(newUser)
}
/**
*
* @description Send verification email for user
*/
private async sendEmailVerify(user: User) {
const verifyToken = this.jwtService.sign(
{
email: user.email,
} as VerifyJWTPayload,
{
secret: this.configService.get('JWT_VERIFY_SECRET'),
expiresIn: this.configService.get('JWT_VERIFY_EXPIRE_TIME'),
},
)
const mailContent: VerifyMailData = {
verifyUrl: `${this.configService.get(
'FRONTEND_DOMAIN',
)}/account/verify-email?token=${verifyToken}`,
}
const mail: MailData = {
recipient: {
recipient: user.email,
},
content: {
subject: 'Email verifizieren',
templateContent: mailContent,
contentTemplate: MailTemplates.VERIFY,
},
}
await this.mailService.scheduleMailNow(mail)
}
/**
* @description Initiate user login
*/
async login(body: LoginDTO): Promise<TokenResponse> {
let user: User
try {
user = await this.userService.findOneByEmail(body.email)
} catch (error) /* istanbul ignore next */ {
this.logger.error(error)
if (error instanceof HttpException) {
throw error
}
throw new InternalServerErrorException()
}
if (!user || !(await compare(body.password, user.password))) {
this.logger.warn(`Attempted but invalid login for user ${body.email}`)
throw new UnauthorizedException()
}
return await this.getAuthPayload(user)
}
/**
* @description Generate tokens
*/
async getAuthPayload(user: User): Promise<TokenResponse> {
await this.userService.setLoginTimestamp(user._id)
return {
access_token: await this.generateJWTToken(user),
refresh_token: await this.generateRefreshToken(user),
}
}
/**
* @description Generate refresh token for passed user
*/
private async generateRefreshToken(user: User): Promise<string> {
return await this.jwtService.sign(
{
id: user._id,
email: user.email,
} as RefreshJWTPayload,
{
expiresIn: this.configService.get('JWT_REFRESH_EXPIRE_TIME'),
secret: this.configService.get('JWT_REFRESH_SECRET'),
},
)
}
/**
* @description Generate access token for passed user
*/
private async generateJWTToken(user: User): Promise<string> {
return this.jwtService.sign({
id: user._id,
email: user.email,
hasVerifiedEmail: user.hasVerifiedEmail,
paymentPlan: user.paymentPlan,
} as JWTPayload)
}
/**
* @description Verify users email
*/
async verifyUserMail(mail: string): Promise<void> {
const user = await this.userService.findOneByEmail(mail)
if (!user) {
this.logger.warn('Verify for user that does not exist was attempted')
throw new NotFoundException('No user with that email address exists')
}
if (user.hasVerifiedEmail) {
this.logger.debug('Skipped verify as users email is already verified')
throw new ConflictException('This user already verified their email')
}
try {
this.logger.debug(`Verifying user mail`)
await this.userService.updateUserEmailVerify(mail)
} catch (error) {
this.logger.error(`User update failed due to an error ${error}`)
throw new InternalServerErrorException('Update could not be made')
}
Iif (!user.stripeCustomerId) return
await this.stripeService.customer_update(user.stripeCustomerId, mail)
}
/**
* @description Request that verification email is send to users email address
*/
async requestUserVerifyMail(id: ObjectId): Promise<void> {
const user = await this.userService.findOneById(id)
// This should never happen, however it is a valid failsave
if (!user) {
throw new NotFoundException('No user')
}
// Dont do anything here, throwing an error is more confusing than helpful
if (user.hasVerifiedEmail) {
this.logger.debug('Verify mail was not send as user is already verified')
return
}
try {
await this.sendEmailVerify(user)
} catch (error) {
this.logger.error(`An error ocured while sending the email ${error}`)
throw new ServiceUnavailableException(
'Mail could not be send as of now. Please try again later',
)
}
}
/**
* @description Send password reset email
*/
async startForgottenPasswordFlow(email: string): Promise<void> {
const user = await this.userService.findOneByEmail(email)
// No error to prevent mail checking
if (!user) return
// Default to case that user does not have a verified email i.e. they have to contact support
let mailContent: MailTemplateContent = {}
let mailTemplate = MailTemplates.PASSWORD_RESET_SUPPORT
if (user.hasVerifiedEmail) {
const resetToken = this.jwtService.sign(
{
id: user._id,
} as PasswordResetJWTPayload,
{
secret: this.configService.get('JWT_PASSWORD_RESET_SECRET'),
expiresIn: this.configService.get('JWT_PASSWORD_RESET_EXPIRE_TIME'),
},
)
const resetUrl = `${this.configService.get(
'FRONTEND_DOMAIN',
)}/account/change-password?token=${resetToken}`
mailContent = { resetUrl } as PasswordResetMailData
mailTemplate = MailTemplates.PASSWORD_RESET
}
const mailData: MailData = {
content: {
subject: 'Email reset',
templateContent: mailContent,
contentTemplate: mailTemplate,
},
recipient: {
recipient: email,
},
}
await this.mailService.scheduleMailNow(mailData)
}
/**
* @description Reset user password
*/
async setNewUserPassword(id: ObjectId, newPassword: string): Promise<void> {
const user = await this.userService.findOneById(id)
// This SHOULD never happen => Therefore internal server error
if (!user) {
this.logger.warn(
`Password update was attempted for user that does not exist`,
)
throw new InternalServerErrorException(
'This user does not seem to exist anymore',
)
}
try {
await this.userService.updateUserPassword(id, newPassword)
// No tests for db failure
/* istanbul ignore next */
} catch (error) {
this.logger.error(
`Could not update a user password due to an error ${error}`,
)
throw new ServiceUnavailableException(
'Password could not be set, please try again later',
)
}
}
}
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