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import { NextRequest, NextResponse } from 'next/server';
import { prisma } from "@/lib/prisma";
import { z } from "zod";
import {
withErrorHandling,
withAuth,
successResponse,
createdResponse,
ApiError,
ApiSuccessResponse,
ApiErrorResponse } from "@/lib/api";
import { Session } from "next-auth";
import { RouteContext } from "@/lib/api/middleware";
/**
* Query schema for GET requests
*/
const querySchema = z.object({
page: z.coerce.number().int().positive().default(1),
limit: z.coerce.number().int().min(1).max(50).default(10),
sortBy: z.enum(["recent", "helpful", "rating_high", "rating_low"]).default("recent"),
rating: z.coerce.number().int().min(1).max(5).optional()});
/**
* Create review schema for POST requests
*/
const createReviewSchema = z.object({
rating: z.number().int().min(1).max(5),
comment: z.string().min(10).max(2000).optional()});
interface ReviewData {
reviews: Array<{
id: number;
rating: number;
comment: string | null;
createdAt: Date;
updatedAt: Date;
user: {
id: number;
name: string | null;
image: string | null;
};
helpfulCount: number;
notHelpfulCount: number;
}>;
stats: {
averageRating: number;
totalReviews: number;
distribution: Record<number, number>;
};
pagination: {
page: number;
limit: number;
total: number;
pages: number;
};
}
/**
* GET /api/products/[id]/reviews
* Get reviews for a specific product with stats
*/
async function handleGet(
request: NextRequest,
context?: RouteContext
): Promise<NextResponse<ApiSuccessResponse<ReviewData>>> {
if (!context?.params) {
throw ApiError.invalidId("product");
}
const resolvedParams = await context.params;
const productId = parseInt(resolvedParams.id);
if (isNaN(productId)) {
throw ApiError.invalidId("product");
}
const searchParams = request.nextUrl.searchParams;
const query = querySchema.parse({
page: searchParams.get("page") || 1,
limit: searchParams.get("limit") || 10,
sortBy: searchParams.get("sortBy") || "recent",
rating: searchParams.get("rating") || undefined});
const skip = (query.page - 1) * query.limit;
// Build where clause
const where = {
productId,
...(query.rating ? { rating: query.rating } : {})};
// Build sort order
let orderBy: Record<string, string> = { createdAt: "desc" };
switch (query.sortBy) {
case "rating_high":
orderBy = { rating: "desc" };
break;
case "rating_low":
orderBy = { rating: "asc" };
break;
case "helpful":
// Sort by helpful count - we'll handle this with raw query or separate logic
orderBy = { createdAt: "desc" };
break;
case "recent":
default:
orderBy = { createdAt: "desc" };
}
// Fetch reviews, total count, and stats in parallel
const [reviews, total, stats] = await Promise.all([
prisma.review.findMany({
where,
include: {
user: {
select: {
id: true,
name: true,
image: true}},
helpful: {
select: {
helpful: true}}},
orderBy,
skip,
take: query.limit}),
prisma.review.count({ where }),
prisma.review.aggregate({
where: { productId },
_avg: { rating: true },
_count: { rating: true }}),
]);
// Calculate rating distribution
const distribution = await prisma.review.groupBy({
by: ["rating"],
where: { productId },
_count: true});
// Transform reviews with helpful counts
const transformedReviews = reviews.map((review) => {
const helpfulCount = review.helpful.filter((h) => h.helpful).length;
const notHelpfulCount = review.helpful.filter((h) => !h.helpful).length;
return {
id: review.id,
rating: review.rating,
comment: review.comment,
createdAt: review.createdAt,
updatedAt: review.updatedAt,
user: {
id: review.user.id,
name: review.user.name,
image: review.user.image},
helpfulCount,
notHelpfulCount};
});
// Sort by helpful if requested (after transformation)
if (query.sortBy === "helpful") {
transformedReviews.sort((a, b) => b.helpfulCount - a.helpfulCount);
}
return successResponse(
{
reviews: transformedReviews,
stats: {
averageRating: stats._avg.rating || 0,
totalReviews: stats._count.rating,
distribution: Object.fromEntries(
[1, 2, 3, 4, 5].map((rating) => [
rating,
distribution.find((d) => d.rating === rating)?._count || 0,
])
)},
pagination: {
page: query.page,
limit: query.limit,
total,
pages: Math.ceil(total / query.limit)}},
{
headers: {
"Cache-Control": "public, s-maxage=60, stale-while-revalidate=120"}}
);
}
export const GET = withErrorHandling(handleGet);
/**
* POST /api/products/[id]/reviews
* Submit a review for a product (authenticated users only)
*/
async function handlePost(
request: NextRequest,
context: RouteContext | undefined,
session: Session
): Promise<NextResponse<ApiSuccessResponse<{
id: number;
rating: number;
comment: string | null;
createdAt: Date;
user: {
id: number;
name: string | null;
image: string | null;
};
message: string;
}> | ApiErrorResponse>> {
if (!context?.params) {
throw ApiError.invalidId("product");
}
const resolvedParams = await context.params;
const productId = parseInt(resolvedParams.id);
if (isNaN(productId)) {
throw ApiError.invalidId("product");
}
// Get user from session
const user = await prisma.user.findUnique({
where: { email: session.user.email! }});
if (!user) {
throw ApiError.notFound("User");
}
// Check if product exists
const product = await prisma.product.findUnique({
where: { id: productId }});
if (!product) {
throw ApiError.notFound("Product", productId);
}
// Check if user already reviewed this product
const existingReview = await prisma.review.findFirst({
where: {
productId,
userId: user.id}});
if (existingReview) {
throw ApiError.conflict("You have already reviewed this product");
}
const body = await request.json();
const validatedData = createReviewSchema.parse(body);
const review = await prisma.review.create({
data: {
productId,
userId: user.id,
rating: validatedData.rating,
comment: validatedData.comment},
include: {
user: {
select: {
id: true,
name: true,
image: true}}}});
return createdResponse({
id: review.id,
rating: review.rating,
comment: review.comment,
createdAt: review.createdAt,
user: review.user,
message: "Review submitted successfully"});
}
export const POST = withErrorHandling(withAuth(handlePost));
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