8.4 무료쿠폰: 쿠폰 등록/재고/사용 처리/만료/1인 제한/로그 o

src/app/api/coupons/redeem/route.ts

@@ -0,0 +1,25 @@
+import { NextResponse } from "next/server";
+import prisma from "@/lib/prisma";
+import { getUserIdFromRequest } from "@/lib/auth";
+import { z } from "zod";
+
+const schema = z.object({ code: z.string().min(1) });
+
+export async function POST(req: Request) {
+  const userId = getUserIdFromRequest(req);
+  if (!userId) return NextResponse.json({ error: "login required" }, { status: 401 });
+  const body = await req.json().catch(() => ({}));
+  const parsed = schema.safeParse(body);
+  if (!parsed.success) return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
+  const coupon = await prisma.coupon.findUnique({ where: { code: parsed.data.code } });
+  if (!coupon || !coupon.active) return NextResponse.json({ error: "invalid coupon" }, { status: 404 });
+  if (coupon.expiresAt && coupon.expiresAt < new Date()) return NextResponse.json({ error: "expired" }, { status: 400 });
+  const used = await prisma.couponRedemption.count({ where: { couponId: coupon.id } });
+  if (coupon.stock > 0 && used >= coupon.stock) return NextResponse.json({ error: "out of stock" }, { status: 400 });
+  const mine = await prisma.couponRedemption.count({ where: { couponId: coupon.id, userId } });
+  if (mine >= coupon.maxPerUser) return NextResponse.json({ error: "quota exceeded" }, { status: 400 });
+  await prisma.couponRedemption.create({ data: { couponId: coupon.id, userId } });
+  return NextResponse.json({ ok: true });
+}
+
+

src/app/api/coupons/route.ts

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+import { NextResponse } from "next/server";
+import prisma from "@/lib/prisma";
+import { z } from "zod";
+
+export async function GET() {
+  const now = new Date();
+  const coupons = await prisma.coupon.findMany({
+    where: { active: true, OR: [{ expiresAt: null }, { expiresAt: { gte: now } }] },
+    orderBy: { createdAt: "desc" },
+    select: { id: true, code: true, title: true, description: true, stock: true, maxPerUser: true, expiresAt: true },
+  });
+  // 사용량 계산
+  const ids = coupons.map((c) => c.id);
+  const agg = await prisma.couponRedemption.groupBy({ by: ["couponId"], where: { couponId: { in: ids } }, _count: { couponId: true } });
+  const usedMap = new Map(agg.map((a) => [a.couponId, a._count.couponId]));
+  const items = coupons.map((c) => ({ ...c, used: usedMap.get(c.id) ?? 0 }));
+  return NextResponse.json({ coupons: items });
+}
+
+const createSchema = z.object({
+  code: z.string().min(1),
+  title: z.string().min(1),
+  description: z.string().optional(),
+  stock: z.coerce.number().int().min(0).default(0),
+  maxPerUser: z.coerce.number().int().min(1).default(1),
+  expiresAt: z.coerce.date().optional(),
+});
+
+export async function POST(req: Request) {
+  const body = await req.json().catch(() => ({}));
+  const parsed = createSchema.safeParse(body);
+  if (!parsed.success) return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 });
+  const data = await prisma.coupon.create({ data: parsed.data });
+  return NextResponse.json({ coupon: data }, { status: 201 });
+}
+
+