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import { UserRole } from '@prisma/client';
import bcrypt from 'bcrypt';
import jwt from 'jsonwebtoken';
import { ZodError } from 'zod';
import {
generateResetToken,
sendPasswordResetEmail,
sendWelcomeEmail,
} from '@/lib/email/nodemailer';
import {
USER_FAVORITE_MESSAGE_KEYS,
USER_FOLLOW_MESSAGE_KEYS,
USER_REGISTER_MESSAGE_KEYS,
} from '@/lib/graphql/MESSAGE_KEYS';
import type {
ChangePasswordInput,
SetNewPasswordInput,
UpdateUserInput,
} from '@/lib/graphql/resolvers/user/mutations/types';
import { prisma } from '@/lib/prisma/prisma';
import { redis } from '@/lib/redis/redis';
import { ErrorTypes } from '@/lib/validation/errorCatalog';
import { throwCustomError } from '@/lib/validation/throwCustomError';
import type { ZodIssueMinimal } from '@/lib/validation/types';
import {
customValidationSchema,
loginValidationSchema,
nameValidationSchema,
passwordEditValidationSchema,
resetPasswordValidationSchema,
setNewPasswordValidationSchema,
} from '@/lib/validation/validation';
import type { CreateUserArgs, LoginUserArgs } from '@/types/user';
const JWT_SECRET =
process.env.JWT_SECRET || 'your-secret-key-change-this-in-production';
const JWT_EXPIRES_IN = '7d';
const SALT_ROUNDS = 10;
const LATEST_RECIPES_LIMIT = 4;
export const UserService = {
// Queries
async getUserById(id: string) {
const user = await prisma.user.findUnique({
where: { id },
include: {
recipes: {
include: { ingredients: true, preparationSteps: true },
},
favoriteRecipes: {
include: { ingredients: true, preparationSteps: true },
},
},
});
if (!user) {
return throwCustomError('User not found', ErrorTypes.NOT_FOUND);
}
return user;
},
async getFavoriteRecipes(userId: string, limit?: number) {
const cacheKey = `user:${userId}:favorites:${limit || 'all'}`;
if (redis) {
try {
const cached = await redis.get(cacheKey);
if (cached) return cached;
} catch (error) {
console.error('Redis cache get error:', error);
}
}
const user = await prisma.user.findUnique({
where: { id: userId },
include: {
favoriteRecipes: {
include: { ingredients: true, preparationSteps: true },
orderBy: { createdAt: 'desc' },
...(limit ? { take: limit } : {}),
},
},
});
if (!user) {
return throwCustomError('User not found', ErrorTypes.NOT_FOUND);
}
if (redis) {
try {
await redis.setex(cacheKey, 60, user.favoriteRecipes);
} catch (error) {
console.error('Redis cache set error:', error);
}
}
return user.favoriteRecipes;
},
async getFollowing(userId: string, limit?: number) {
const cacheKey = `user:${userId}:following:${limit || 'all'}`;
if (redis) {
try {
const cached = await redis.get(cacheKey);
if (cached) return cached;
} catch (error) {
console.error('Redis cache get error:', error);
}
}
const [follows, totalFollowing] = await Promise.all([
prisma.follow.findMany({
where: { followerId: userId },
include: {
following: {
include: {
recipes: {
orderBy: { createdAt: 'desc' },
take: LATEST_RECIPES_LIMIT,
include: { ingredients: true, preparationSteps: true },
},
_count: { select: { recipes: true } },
},
},
},
orderBy: { createdAt: 'desc' },
...(limit ? { take: limit } : {}),
}),
prisma.follow.count({ where: { followerId: userId } }),
]);
const users = follows.map((follow) => ({
id: follow.following.id,
firstName: follow.following.firstName,
lastName: follow.following.lastName,
userName: follow.following.userName,
recipeCount: follow.following._count.recipes,
followedAt: follow.createdAt,
latestRecipes: follow.following.recipes,
}));
const result = { users, totalFollowing };
if (redis) {
try {
await redis.setex(cacheKey, 60, result);
} catch (error) {
console.error('Redis cache set error:', error);
}
}
return result;
},
// Mutations
async createUser(userRegisterInput: CreateUserArgs['userRegisterInput']) {
const {
firstName,
lastName,
userName,
email,
password,
confirmPassword,
locale,
} = userRegisterInput;
try {
customValidationSchema.parse({
firstName,
lastName,
userName,
email,
password,
confirmPassword,
});
} catch (error) {
if (error instanceof ZodError) {
const firstErrorMessage =
error.issues[0]?.message || 'Validation failed';
return throwCustomError(
firstErrorMessage,
ErrorTypes.VALIDATION_ERROR,
{
messageKey: USER_REGISTER_MESSAGE_KEYS.VALIDATION_ERROR,
zodIssues: error.issues as ZodIssueMinimal[],
originalError: error,
},
);
}
return throwCustomError('Invalid input data', ErrorTypes.BAD_REQUEST);
}
const existingUser = await prisma.user.findFirst({
where: {
OR: [
{ userName: { equals: userName, mode: 'insensitive' } },
{ email: { equals: email, mode: 'insensitive' } },
],
},
});
if (existingUser) {
if (existingUser.userName.toLowerCase() === userName.toLowerCase()) {
return throwCustomError(
'This username is already taken',
ErrorTypes.CONFLICT,
{
messageKey: USER_REGISTER_MESSAGE_KEYS.USERNAME_TAKEN,
},
);
}
if (existingUser.email.toLowerCase() === email.toLowerCase()) {
return throwCustomError(
'This email address is already registered',
ErrorTypes.CONFLICT,
{
messageKey: USER_REGISTER_MESSAGE_KEYS.EMAIL_TAKEN,
},
);
}
}
const hashedPassword = await bcrypt.hash(password, SALT_ROUNDS);
const newUser = await prisma.user.create({
data: {
firstName,
lastName,
userName,
email: email.toLowerCase(),
password: hashedPassword,
locale: locale || 'en-gb',
role: UserRole.USER,
},
});
sendWelcomeEmail(newUser.email, newUser.firstName).catch((error) => {
console.error('Error sending welcome email:', error);
});
return {
success: true,
message: 'User successfully created',
messageKey: USER_REGISTER_MESSAGE_KEYS.SUCCESS,
statusCode: 201,
user: {
...newUser,
recipes: [],
favoriteRecipes: [],
},
};
},
async loginUser(userLoginInput: LoginUserArgs['userLoginInput']) {
const { email, password } = userLoginInput;
const validation = loginValidationSchema.safeParse(userLoginInput);
if (!validation.success) {
return throwCustomError(
'Invalid input data',
ErrorTypes.VALIDATION_ERROR,
{
zodIssues: validation.error.issues as ZodIssueMinimal[],
},
);
}
const user = await prisma.user.findUnique({
where: { email: email.toLowerCase() },
});
if (!user) {
return throwCustomError(
'Invalid email address or password',
ErrorTypes.UNAUTHORIZED,
);
}
const isPasswordValid = await bcrypt.compare(password, user.password);
if (!isPasswordValid) {
return throwCustomError(
'Invalid email address or password',
ErrorTypes.UNAUTHORIZED,
);
}
const token = jwt.sign(
{
userId: user.id,
userName: user.userName,
email: user.email,
role: user.role,
},
JWT_SECRET,
{ expiresIn: JWT_EXPIRES_IN },
);
return {
token,
userId: user.id,
user: {
...user,
recipes: [],
favoriteRecipes: [],
},
};
},
async changePassword(
userId: string,
passwordEditInput: ChangePasswordInput['passwordEditInput'],
) {
const validation =
passwordEditValidationSchema.safeParse(passwordEditInput);
if (!validation.success) {
return throwCustomError(
'Invalid input data',
ErrorTypes.VALIDATION_ERROR,
{
zodIssues: validation.error.issues,
},
);
}
const { currentPassword, newPassword } = passwordEditInput;
const user = await prisma.user.findUnique({ where: { id: userId } });
if (!user) {
return throwCustomError('User not found', ErrorTypes.NOT_FOUND);
}
const isMatch = await bcrypt.compare(currentPassword, user.password);
if (!isMatch) {
return throwCustomError(
'Invalid current password',
ErrorTypes.BAD_REQUEST,
);
}
const hashedPassword = await bcrypt.hash(newPassword, SALT_ROUNDS);
await prisma.user.update({
where: { id: userId },
data: { password: hashedPassword },
});
return true;
},
async resetPassword(email: string) {
const validation = resetPasswordValidationSchema.safeParse({ email });
if (!validation.success) {
return throwCustomError(
'Invalid email address',
ErrorTypes.VALIDATION_ERROR,
{
zodIssues: validation.error.issues,
},
);
}
const normalizedEmail = email.toLowerCase();
const user = await prisma.user.findUnique({
where: { email: normalizedEmail },
});
if (!user) {
console.log(
`Password reset requested for non-existent email: ${normalizedEmail}`,
);
return {
success: true,
message:
'If an account with that email exists, a password reset link has been sent.',
};
}
const resetToken = generateResetToken();
const hashedToken = crypto
.createHash('sha256')
.update(resetToken)
.digest('hex');
const resetExpires = new Date(Date.now() + 60 * 60 * 1000);
await prisma.user.update({
where: { email: normalizedEmail },
data: {
resetPasswordToken: hashedToken,
resetPasswordExpires: resetExpires,
},
});
try {
await sendPasswordResetEmail(user.email, resetToken);
} catch (error) {
console.error('Error sending reset email:', error);
return throwCustomError(
'Failed to send password reset email',
ErrorTypes.INTERNAL_SERVER_ERROR,
);
}
return {
success: true,
message:
'If an account with that email exists, a password reset link has been sent.',
};
},
async setNewPassword(input: SetNewPasswordInput) {
const { token, newPassword } = input;
const validation = setNewPasswordValidationSchema.safeParse({
newPassword,
confirmPassword: newPassword,
});
if (!validation.success) {
return throwCustomError(
'Password must be at least 8 characters long and include uppercase, lowercase letters and a number',
ErrorTypes.VALIDATION_ERROR,
{ zodIssues: validation.error.issues },
);
}
const hashedToken = crypto.createHash('sha256').update(token).digest('hex');
const user = await prisma.user.findFirst({
where: {
resetPasswordToken: hashedToken,
resetPasswordExpires: { gt: new Date() },
},
});
if (!user) {
return throwCustomError(
'Invalid or expired reset token. Please request a new password reset.',
ErrorTypes.BAD_REQUEST,
);
}
const hashedPassword = await bcrypt.hash(newPassword, SALT_ROUNDS);
await prisma.user.update({
where: { id: user.id },
data: {
password: hashedPassword,
resetPasswordToken: null,
resetPasswordExpires: null,
},
});
console.log(`Password successfully reset for user: ${user.email}`);
return {
success: true,
message:
'Password successfully reset. You can now login with your new password.',
};
},
async updateUser(
userId: string,
userUpdateInput: UpdateUserInput['userUpdateInput'],
) {
const { firstName, lastName, locale } = userUpdateInput;
if (firstName || lastName) {
nameValidationSchema.parse({
firstName: firstName || 'placeholder',
lastName: lastName || 'placeholder',
});
}
const user = await prisma.user.findUnique({ where: { id: userId } });
if (!user) {
return throwCustomError('User not found', ErrorTypes.NOT_FOUND);
}
const updatedUser = await prisma.user.update({
where: { id: userId },
data: {
firstName: firstName ?? user.firstName,
lastName: lastName ?? user.lastName,
locale: locale ?? user.locale,
},
});
return {
success: true,
message: 'User updated successfully',
user: updatedUser,
};
},
async deleteUser(currentUserId: string, currentUserRole: string, id: string) {
if (currentUserRole !== 'ADMIN' && currentUserId !== id) {
return throwCustomError(
'Unauthorized operation - insufficient permissions',
ErrorTypes.FORBIDDEN,
);
}
const user = await prisma.user.findUnique({ where: { id } });
if (!user) {
return throwCustomError('User not found', ErrorTypes.NOT_FOUND);
}
await prisma.user.delete({ where: { id } });
if (redis) {
try {
await Promise.all([
redis.del(`user:${id}:favorites:all`),
redis.del(`user:${id}:following:all`),
redis.del(`recipes:user:${id}:all`),
]);
} catch (error) {
console.error('Redis cache invalidation error:', error);
}
}
return true;
},
async deleteAllUser(currentUserId: string, currentUserRole: string) {
if (currentUserRole !== 'ADMIN') {
return throwCustomError(
'Unauthorized operation - admin rights required',
ErrorTypes.FORBIDDEN,
);
}
const result = await prisma.user.deleteMany({
where: { id: { not: currentUserId } },
});
return result.count;
},
async addToFavoriteRecipes(
currentUserId: string,
currentUserRole: string,
targetUserId: string,
recipeId: string,
) {
if (currentUserId !== targetUserId && currentUserRole !== 'ADMIN') {
return {
success: false,
message: 'Unauthorized operation - insufficient permissions',
messageKey: USER_FAVORITE_MESSAGE_KEYS.UNAUTHORIZED,
statusCode: ErrorTypes.FORBIDDEN.errorStatus,
};
}
const user = await prisma.user.findUnique({ where: { id: targetUserId } });
if (!user) {
return {
success: false,
message: 'User not found',
messageKey: USER_FAVORITE_MESSAGE_KEYS.USER_NOT_FOUND,
statusCode: ErrorTypes.NOT_FOUND.errorStatus,
};
}
const recipe = await prisma.recipe.findUnique({ where: { id: recipeId } });
if (!recipe) {
return {
success: false,
message: 'Recipe not found',
messageKey: USER_FAVORITE_MESSAGE_KEYS.RECIPE_NOT_FOUND,
statusCode: ErrorTypes.NOT_FOUND.errorStatus,
};
}
const alreadyFavorite = await prisma.user.findFirst({
where: { id: targetUserId, favoriteRecipes: { some: { id: recipeId } } },
});
if (alreadyFavorite) {
return {
success: false,
message: 'Recipe already in favorites',
messageKey: USER_FAVORITE_MESSAGE_KEYS.ALREADY_FAVORITE,
statusCode: ErrorTypes.BAD_REQUEST.errorStatus,
};
}
await prisma.user.update({
where: { id: targetUserId },
data: { favoriteRecipes: { connect: { id: recipeId } } },
});
if (redis) {
try {
await redis.del(`user:${targetUserId}:favorites:all`);
} catch (error) {
console.error('Redis cache invalidation error:', error);
}
}
return {
success: true,
message: 'Recipe successfully added to favorites',
messageKey: USER_FAVORITE_MESSAGE_KEYS.SUCCESS,
statusCode: 200,
};
},
async removeFromFavoriteRecipes(
currentUserId: string,
currentUserRole: string,
targetUserId: string,
recipeId: string,
) {
if (currentUserId !== targetUserId && currentUserRole !== 'ADMIN') {
return {
success: false,
message: 'Unauthorized operation - insufficient permissions',
messageKey: USER_FAVORITE_MESSAGE_KEYS.UNAUTHORIZED,
statusCode: ErrorTypes.FORBIDDEN.errorStatus,
};
}
const user = await prisma.user.findUnique({ where: { id: targetUserId } });
if (!user) {
return {
success: false,
message: 'User not found',
messageKey: USER_FAVORITE_MESSAGE_KEYS.USER_NOT_FOUND,
statusCode: ErrorTypes.NOT_FOUND.errorStatus,
};
}
const recipe = await prisma.recipe.findUnique({ where: { id: recipeId } });
if (!recipe) {
return {
success: false,
message: 'Recipe not found',
messageKey: USER_FAVORITE_MESSAGE_KEYS.RECIPE_NOT_FOUND,
statusCode: ErrorTypes.NOT_FOUND.errorStatus,
};
}
const alreadyFavorite = await prisma.user.findFirst({
where: { id: targetUserId, favoriteRecipes: { some: { id: recipeId } } },
});
if (!alreadyFavorite) {
return {
success: false,
message: 'Recipe not in favorites',
messageKey: USER_FAVORITE_MESSAGE_KEYS.NOT_IN_FAVORITES,
statusCode: ErrorTypes.BAD_REQUEST.errorStatus,
};
}
await prisma.user.update({
where: { id: targetUserId },
data: { favoriteRecipes: { disconnect: { id: recipeId } } },
});
if (redis) {
try {
await redis.del(`user:${targetUserId}:favorites:all`);
} catch (error) {
console.error('Redis cache invalidation error:', error);
}
}
return {
success: true,
message: 'Recipe successfully removed from favorites',
messageKey: USER_FAVORITE_MESSAGE_KEYS.SUCCESS,
statusCode: 200,
};
},
async followUser(currentUserId: string, targetUserId: string) {
if (currentUserId === targetUserId) {
return {
success: false,
message: 'You cannot follow yourself',
messageKey: USER_FOLLOW_MESSAGE_KEYS.CANNOT_FOLLOW_SELF,
statusCode: ErrorTypes.BAD_REQUEST.errorStatus,
};
}
const targetUser = await prisma.user.findUnique({
where: { id: targetUserId },
});
if (!targetUser) {
return {
success: false,
message: 'User not found',
messageKey: USER_FOLLOW_MESSAGE_KEYS.USER_NOT_FOUND,
statusCode: ErrorTypes.NOT_FOUND.errorStatus,
};
}
const existingFollow = await prisma.follow.findUnique({
where: {
followerId_followingId: {
followerId: currentUserId,
followingId: targetUserId,
},
},
});
if (existingFollow) {
return {
success: false,
message: 'Already following this user',
messageKey: USER_FOLLOW_MESSAGE_KEYS.ALREADY_FOLLOWING,
statusCode: ErrorTypes.BAD_REQUEST.errorStatus,
};
}
await prisma.follow.create({
data: { followerId: currentUserId, followingId: targetUserId },
});
if (redis) {
try {
await redis.del(`user:${currentUserId}:following:all`);
} catch (error) {
console.error('Redis cache invalidation error:', error);
}
}
return {
success: true,
message: 'Successfully followed user',
messageKey: USER_FOLLOW_MESSAGE_KEYS.FOLLOW_SUCCESS,
statusCode: 200,
};
},
async unfollowUser(currentUserId: string, targetUserId: string) {
const existingFollow = await prisma.follow.findUnique({
where: {
followerId_followingId: {
followerId: currentUserId,
followingId: targetUserId,
},
},
});
if (!existingFollow) {
return {
success: false,
message: 'You are not following this user',
messageKey: USER_FOLLOW_MESSAGE_KEYS.NOT_FOLLOWING,
statusCode: ErrorTypes.BAD_REQUEST.errorStatus,
};
}
await prisma.follow.delete({
where: {
followerId_followingId: {
followerId: currentUserId,
followingId: targetUserId,
},
},
});
if (redis) {
try {
await redis.del(`user:${currentUserId}:following:all`);
} catch (error) {
console.error('Redis cache invalidation error:', error);
}
}
return {
success: true,
message: 'Successfully unfollowed user',
messageKey: USER_FOLLOW_MESSAGE_KEYS.UNFOLLOW_SUCCESS,
statusCode: 200,
};
},
};
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