All files / src/app/api/user/notification-preferences route.ts

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export const dynamic = "force-dynamic";

import { NextRequest, NextResponse } from 'next/server';
import { Session } from "next-auth";
import { prisma } from "@/lib/prisma";
import { z } from "zod";
import {
  withAuth,
  withErrorHandling,
  successResponse,
  ApiError,
  ApiSuccessResponse,
  ApiErrorResponse } from "@/lib/api";
import { RouteContext } from "@/lib/api/middleware";

// Schema for notification preferences (matching actual Prisma model)
const preferencesSchema = z.object({
  email: z.boolean().optional(),
  push: z.boolean().optional(),
  sms: z.boolean().optional(),
  orders: z.boolean().optional(),
  reviews: z.boolean().optional(),
  stock: z.boolean().optional(),
  promotions: z.boolean().optional()});

export type NotificationPreferences = z.infer<typeof preferencesSchema>;

// Default preferences for new users
const defaultPreferences: NotificationPreferences = {
  email: true,
  push: true,
  sms: false,
  orders: true,
  reviews: true,
  stock: true,
  promotions: false};

/**
 * GET /api/user/notification-preferences
 * Get current user's notification preferences
 */
async function handleGet(
  _request: NextRequest,
  _context: RouteContext | undefined,
  session: Session
): Promise<NextResponse<ApiSuccessResponse<NotificationPreferences> | ApiErrorResponse>> {
  const user = await prisma.user.findUnique({
    where: { email: session.user.email! },
    include: { notificationPreferences: true }});

  if (!user) {
    throw ApiError.notFound("User");
  }

  // Merge with defaults to ensure all fields are present
  const userPrefs = user.notificationPreferences;
  const preferences: NotificationPreferences = {
    email: userPrefs?.email ?? defaultPreferences.email,
    push: userPrefs?.push ?? defaultPreferences.push,
    sms: userPrefs?.sms ?? defaultPreferences.sms,
    orders: userPrefs?.orders ?? defaultPreferences.orders,
    reviews: userPrefs?.reviews ?? defaultPreferences.reviews,
    stock: userPrefs?.stock ?? defaultPreferences.stock,
    promotions: userPrefs?.promotions ?? defaultPreferences.promotions};

  return successResponse(preferences);
}

export const GET = withErrorHandling(withAuth(handleGet));

/**
 * PUT /api/user/notification-preferences
 * Update user's notification preferences
 */
async function handlePut(
  request: NextRequest,
  _context: RouteContext | undefined,
  session: Session
): Promise<NextResponse<ApiSuccessResponse<unknown> | ApiErrorResponse>> {
  const body = await request.json();
  const validationResult = preferencesSchema.safeParse(body);

  if (!validationResult.success) {
    throw ApiError.validation("Invalid preferences", validationResult.error.issues);
  }

  const user = await prisma.user.findUnique({
    where: { email: session.user.email! },
    select: { id: true }});

  if (!user) {
    throw ApiError.notFound("User");
  }

  // Upsert notification preferences
  const updatedPreferences = await prisma.notificationPreference.upsert({
    where: { userId: user.id },
    create: {
      userId: user.id,
      ...defaultPreferences,
      ...validationResult.data},
    update: validationResult.data});

  return successResponse({
    ...updatedPreferences,
    message: "Notification preferences updated successfully"});
}

export const PUT = withErrorHandling(withAuth(handlePut));

/**
 * PATCH /api/user/notification-preferences
 * Toggle a single notification preference
 */
async function handlePatch(
  request: NextRequest,
  _context: RouteContext | undefined,
  session: Session
): Promise<NextResponse<ApiSuccessResponse<unknown> | ApiErrorResponse>> {
  const body = await request.json();
  const { key, value } = body;

  if (!key || typeof value !== "boolean") {
    throw ApiError.badRequest("Invalid request. Provide key and boolean value.");
  }

  // Validate key
  const validKeys = Object.keys(defaultPreferences);
  if (!validKeys.includes(key)) {
    throw ApiError.badRequest(`Invalid preference key. Valid keys: ${validKeys.join(", ")}`);
  }

  const user = await prisma.user.findUnique({
    where: { email: session.user.email! },
    select: { id: true }});

  if (!user) {
    throw ApiError.notFound("User");
  }

  // Upsert with the single field update
  const updatedPreferences = await prisma.notificationPreference.upsert({
    where: { userId: user.id },
    create: {
      userId: user.id,
      ...defaultPreferences,
      [key]: value},
    update: {
      [key]: value}});

  return successResponse({
    ...updatedPreferences,
    message: `${key} preference updated to ${value}`});
}

export const PATCH = withErrorHandling(withAuth(handlePatch));