All files / src/app/api/wishlist route.ts

100% Statements 161/161
100% Branches 18/18
100% Functions 3/3
100% Lines 161/161

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import { NextRequest, NextResponse } from 'next/server';
import {
  withAuth,
  withErrorHandling,
  successResponse,
  createdResponse,
  validationErrorResponse,
  ApiError,
  ApiSuccessResponse,
  ApiErrorResponse } from "@/lib/api";
import { RouteContext } from "@/lib/api/middleware";
import { prisma } from "@/lib/prisma";
import { addToWishlistSchema, validateInput } from "@/lib/validation-schemas";
import { Session } from "next-auth";
 
// Type for wishlist item with product
interface WishlistItemWithProduct {
  id: number;
  createdAt: Date;
  product: {
    id: number;
    title: string;
    price: number;
    discountedPrice: number | null;
    images: Array<{ thumbnailUrl: string | null; url: string }>;
    reviews: Array<{ rating: number }>;
  };
}
 
interface TransformedWishlistItem {
  id: number;
  title: string;
  price: number;
  discountedPrice: number | null;
  reviews: number;
  averageRating: number;
  imgs: {
    thumbnails: string[];
    previews: string[];
  };
  addedAt: Date;
}
 
// GET /api/wishlist - Get user's wishlist items
async function handleGet(
  _request: NextRequest,
  _context: RouteContext | undefined,
  session: Session
): Promise<NextResponse<ApiSuccessResponse<TransformedWishlistItem[]>>> {
  const userId = session.user.id;
 
  const wishlistItems = await prisma.wishlist.findMany({
    where: { userId },
    include: {
      product: {
        include: {
          images: {
            orderBy: { order: "asc" }},
          reviews: {
            select: {
              rating: true}}}}},
    orderBy: {
      createdAt: "desc"}});
 
  // Transform to match frontend Product type
  const transformedWishlist = wishlistItems.map(
    (item: WishlistItemWithProduct) => {
      const totalRating = item.product.reviews.reduce(
        (sum: number, review: { rating: number }) => sum + review.rating,
        0
      );
      const averageRating =
        item.product.reviews.length > 0
          ? totalRating / item.product.reviews.length
          : 0;
 
      return {
        id: item.product.id,
        title: item.product.title,
        price: item.product.price,
        discountedPrice: item.product.discountedPrice,
        reviews: item.product.reviews.length,
        averageRating,
        imgs: {
          thumbnails: item.product.images.map(
            (img) => img.thumbnailUrl || img.url
          ),
          previews: item.product.images.map((img) => img.url)},
        addedAt: item.createdAt};
    }
  );
 
  return successResponse(transformedWishlist);
}
 
// DELETE /api/wishlist - Clear all wishlist items
async function handleDelete(
  _request: NextRequest,
  _context: RouteContext | undefined,
  session: Session
): Promise<NextResponse<ApiSuccessResponse<{ success: boolean }>>> {
  const userId = session.user.id;
 
  await prisma.wishlist.deleteMany({
    where: { userId }});
 
  return successResponse({ success: true });
}
 
// POST /api/wishlist - Add item to wishlist
async function handlePost(
  request: NextRequest,
  _context: RouteContext | undefined,
  session: Session
): Promise<NextResponse<ApiSuccessResponse<unknown> | ApiErrorResponse>> {
  const body = await request.json();
  const userId = session.user.id;
 
  // Validate input
  const validation = validateInput(addToWishlistSchema, body);
  if (!validation.success) {
    return validationErrorResponse("Validation failed", validation.errors);
  }
 
  const { productId } = validation.data!;
 
  // Check if product exists
  const product = await prisma.product.findUnique({
    where: { id: productId }});
 
  if (!product) {
    throw ApiError.notFound("Product");
  }
 
  // Check if already in wishlist
  const existingItem = await prisma.wishlist.findUnique({
    where: {
      userId_productId: {
        userId,
        productId}}});
 
  if (existingItem) {
    throw ApiError.conflict("Product already in wishlist");
  }
 
  // Add to wishlist
  const wishlistItem = await prisma.wishlist.create({
    data: {
      userId,
      productId},
    include: {
      product: {
        include: {
          images: true}}}});
 
  return createdResponse(wishlistItem);
}
 
export const GET = withErrorHandling(withAuth(handleGet));
export const DELETE = withErrorHandling(withAuth(handleDelete));
export const POST = withErrorHandling(withAuth(handlePost));