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* User service.
* @packageDocumentation
*/
import { Injectable, Inject, forwardRef } from '@nestjs/common';
import { DBService } from '../db/db.service';
import { ResourceService } from '../resource/resource.service';
import { ImageService } from '../image/image.service';
import { SessionService } from '../session/session.service';
import { bookTableName } from '../book/book.service';
import { userInterestTableName } from '../user-interest/user-interest.service';
import { NBUser } from './user.interface';
import { NBSession } from '../session/session.interface';
import { NBBook } from '../book/book.interface';
import { ServiceException } from '../service.exception';
import * as bcrypt from 'bcrypt';
/**
* User table name.
*/
export const userTableName = 'NB_USER';
/**
* User table service.
*/
@Injectable()
export class UserService {
constructor(
@Inject(forwardRef(() => DBService))
private readonly dbService: DBService,
@Inject(forwardRef(() => ResourceService))
private readonly resourceService: ResourceService,
@Inject(forwardRef(() => ImageService))
private readonly imageService: ImageService,
@Inject(forwardRef(() => SessionService))
private readonly sessionService: SessionService,
) {}
/**
* Create a new user.
*
* @param firstname The user's first name.
* @param lastname The user's last name.
* @param email The user's email address.
* @param password The user's password.
* @returns The new user record.
*/
public async createUser(
firstname: string,
lastname: string,
email: string,
password: string,
): Promise<NBUser> {
const userNameMaxLength = await this.resourceService.getResource<number>(
'USER_NAME_MAX_LENGTH',
);
const userEmailMinLength = await this.resourceService.getResource<number>(
'USER_EMAIL_MIN_LENGTH',
);
const userEmailMaxLength = await this.resourceService.getResource<number>(
'USER_EMAIL_MAX_LENGTH',
);
const userPasswordMinLength =
await this.resourceService.getResource<number>(
'USER_PASSWORD_MIN_LENGTH',
);
const userPasswordMaxLength =
await this.resourceService.getResource<number>(
'USER_PASSWORD_MAX_LENGTH',
);
const emailAddressWithoutDomain = email.replace('@luther.edu', '');
const emailAddress = `${emailAddressWithoutDomain}@luther.edu`;
if (firstname.length > 0 && firstname.length <= userNameMaxLength) {
if (lastname.length > 0 && lastname.length <= userNameMaxLength) {
if (
emailAddress.length >= userEmailMinLength &&
emailAddress.length <= userEmailMaxLength
) {
if (!emailAddressWithoutDomain.includes('@')) {
if (
password.length >= userPasswordMinLength &&
password.length <= userPasswordMaxLength
) {
const emailExists = await this.userExistsByEmail(emailAddress);
if (!emailExists) {
const passwordHash = await this.hashPassword(password);
return this.dbService.create<NBUser>(userTableName, {
firstname,
lastname,
email: emailAddress,
passwordHash,
});
} else {
throw new ServiceException('Email is already in use');
}
} else {
throw new ServiceException(
`Password must be between ${userPasswordMinLength} and ${userPasswordMaxLength} characters`,
);
}
} else {
throw new ServiceException('Please use Norse email address');
}
} else {
throw new ServiceException(
`Email must be between ${userEmailMinLength} and ${userEmailMaxLength} characters`,
);
}
} else {
throw new ServiceException(
`First name must be between 1 and ${userNameMaxLength} characters`,
);
}
} else {
throw new ServiceException(
`Last name must be between 1 and ${userNameMaxLength} characters`,
);
}
}
/**
* Determine whether or not a user exists.
*
* @param userID The ID of the user.
* @returns Whether or not the user exists.
*/
public async userExists(userID: string): Promise<boolean> {
const user = await this.dbService.getByID<NBUser>(userTableName, userID);
return !!user;
}
/**
* Determine whether or not a user with a given email address exists.
* @param email The user's email.
* @returns Whether or not a user with the given email address exists.
*/
public async userExistsByEmail(email: string): Promise<boolean> {
const user = await this.dbService.getByFields<NBUser>(userTableName, {
email,
});
return !!user;
}
/**
* Get a user.
*
* @param userID The user's ID.
* @returns The user record.
*/
public async getUser(userID: string): Promise<NBUser> {
const user = await this.dbService.getByID<NBUser>(userTableName, userID);
if (user) {
return user;
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Get a user given an email address.
*
* @param email The user's email address.
* @returns The user record.
*/
public async getUserByEmail(email: string): Promise<NBUser> {
const user = await this.dbService.getByFields<NBUser>(userTableName, {
email,
});
if (user) {
return user;
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Get the books currently listed by a user.
*
* @param userID The user's ID.
* @returns All books currently listed by the user.
*/
public async getCurrentBooks(userID: string): Promise<NBBook[]> {
const userExists = await this.userExists(userID);
if (userExists) {
return this.dbService.listByFields<NBBook>(
bookTableName,
{ userID },
{ fieldName: 'listTime', sortOrder: 'ASC' },
);
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Set a user's password.
*
* @param userID The user's ID.
* @param newPassword The new password.
* @returns The updated user record.
*/
public async setPassword(
userID: string,
newPassword: string,
): Promise<NBUser> {
const userPasswordMinLength =
await this.resourceService.getResource<number>(
'USER_PASSWORD_MIN_LENGTH',
);
const userPasswordMaxLength =
await this.resourceService.getResource<number>(
'USER_PASSWORD_MAX_LENGTH',
);
if (
newPassword.length >= userPasswordMinLength &&
newPassword.length <= userPasswordMaxLength
) {
const userExists = await this.userExists(userID);
if (userExists) {
const passwordHash = await this.hashPassword(newPassword);
return this.dbService.updateByID<NBUser>(userTableName, userID, {
passwordHash,
});
} else {
throw new ServiceException('User does not exist');
}
} else {
throw new ServiceException(
`Password must be between ${userPasswordMinLength} and ${userPasswordMaxLength} characters`,
);
}
}
/**
* Set a user's verified status.
*
* @param userID The user's ID.
* @param verified The new verified status.
* @returns The updated user record.
*/
public async setVerified(userID: string, verified = true): Promise<NBUser> {
const userExists = await this.userExists(userID);
if (userExists) {
return this.dbService.updateByID<NBUser>(userTableName, userID, {
verified,
});
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Set a user's image.
*
* @param userID The user's ID.
* @param imageData The image data.
* @returns The updated user record.
*/
public async setUserImage(
userID: string,
imageData: string,
): Promise<NBUser> {
const user = await this.getUser(userID);
if (user.imageID) {
await this.imageService.setImageData(user.imageID, imageData);
return user;
} else {
const image = await this.imageService.createImage(imageData);
return this.dbService.updateByID<NBUser>(userTableName, userID, {
imageID: image.id,
});
}
}
/**
* Delete a user's image.
*
* @param userID The user's ID.
* @returns The updated user record.
*/
public async deleteUserImage(userID: string): Promise<NBUser> {
const user = await this.getUser(userID);
if (user.imageID) {
await this.imageService.deleteImage(user.imageID);
return this.dbService.updateByID<NBUser>(userTableName, userID, {
imageID: null,
});
} else {
return user;
}
}
/**
* Increment the number of books a user has listed.
*
* @param userID The user's ID.
* @param num The number to increment by.
* @returns The updated user record.
*/
public async incrementBooksListed(userID: string, num = 1): Promise<NBUser> {
const user = await this.getUser(userID);
return this.dbService.updateByID<NBUser>(userTableName, userID, {
numBooksListed: user.numBooksListed + num,
});
}
/**
* Increment the number of books a user has sold.
*
* @param userID The user's ID.
* @param num The number to increment by.
* @returns The updated user record.
*/
public async incrementBooksSold(userID: string, num = 1): Promise<NBUser> {
const user = await this.getUser(userID);
return this.dbService.updateByID<NBUser>(userTableName, userID, {
numBooksSold: user.numBooksSold + num,
});
}
/**
* Increment the amount of money a user has made.
*
* @param userID The user's ID.
* @param amount The amount of money to add.
* @returns The updated user record.
*/
public async addMoneyMade(userID: string, amount: number): Promise<NBUser> {
const user = await this.getUser(userID);
return this.dbService.updateByID<NBUser>(userTableName, userID, {
moneyMade: user.moneyMade + amount,
});
}
/**
* Get a list of books recommended to the user.
*
* @param userID The user's ID.
* @returns The list of recommended books.
*/
public async recommendations(userID: string): Promise<NBBook[]> {
const sql = `
(
SELECT "${bookTableName}".*
FROM "${bookTableName}"
JOIN "${userInterestTableName}"
ON "${bookTableName}"."departmentID" = "${userInterestTableName}"."departmentID"
WHERE "${userInterestTableName}"."userID" = ?
AND "${bookTableName}"."userID" != ?
) UNION (
SELECT "${bookTableName}".*
FROM "${bookTableName}"
JOIN (
SELECT *
FROM "${bookTableName}"
WHERE "userID" = ?
) AS "USER_BOOKS"
ON "${bookTableName}"."departmentID" = "USER_BOOKS"."departmentID"
WHERE "${bookTableName}"."userID" != ?
) ORDER BY "listTime" ASC;`;
const params = [userID, userID, userID, userID];
return this.dbService.execute<NBBook>(sql, params);
}
/**
* Log a user in and return the new session.
*
* @param email The user's email address.
* @param password The user's password.
* @returns The new user session.
*/
public async login(email: string, password: string): Promise<NBSession> {
const emailAddress = email.includes('@') ? email : `${email}@luther.edu`;
const userExists = await this.userExistsByEmail(emailAddress);
if (userExists) {
const user = await this.getUserByEmail(emailAddress);
const passwordMatch = await this.passwordMatch(
password,
user.passwordHash,
);
if (passwordMatch && user.verified) {
const sql = `UPDATE "${userTableName}" SET "lastLoginTime" = NOW() WHERE id = ?;`;
const params = [user.id];
await this.dbService.execute(sql, params);
const session = await this.sessionService.createSession(user.id);
return session;
} else {
throw new ServiceException('Invalid login');
}
} else {
throw new ServiceException('Invalid login');
}
}
/**
* Delete a user.
*
* @param userID The user's ID.
*/
public async deleteUser(userID: string): Promise<void> {
await this.deleteUserImage(userID);
await this.dbService.deleteByID(userTableName, userID);
}
/**
* Prune all old unverified accounts.
*/
public async pruneUnverifiedUsers(): Promise<void> {
const unverifiedUserAge = await this.resourceService.getResource<number>(
'UNVERIFIED_USER_AGE',
);
const sql = `DELETE FROM "${userTableName}" WHERE "verified" = FALSE AND EXTRACT(EPOCH FROM NOW() - "joinTime") >= ${unverifiedUserAge};`;
await this.dbService.execute(sql);
}
/**
* Hash a password.
*
* @param password The password.
* @param rounds The number of salt rounds for bcrypt to use.
* @returns The hashed password.
*/
private async hashPassword(password: string): Promise<string> {
const saltRounds = await this.resourceService.getResource<number>(
'SALT_ROUNDS',
);
return bcrypt.hash(password, saltRounds);
}
/**
* Check if passwords match.
*
* @param password The password.
* @param hash The hashed password.
* @returns Whether or not the password and hash match.
*/
private async passwordMatch(
password: string,
hash: string,
): Promise<boolean> {
return bcrypt.compare(password, hash);
}
}
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