8.6 주변 제휴업체: 위치 기반 목록/지도/필터(거리/카테고리) o

src/app/api/partners/route.ts

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+import { NextResponse } from "next/server";
+import prisma from "@/lib/prisma";
+
+function haversine(lat1: number, lon1: number, lat2: number, lon2: number) {
+  const toRad = (v: number) => (v * Math.PI) / 180;
+  const R = 6371; // km
+  const dLat = toRad(lat2 - lat1);
+  const dLon = toRad(lon2 - lon1);
+  const a = Math.sin(dLat / 2) ** 2 + Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * Math.sin(dLon / 2) ** 2;
+  const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+  return R * c;
+}
+
+export async function GET(req: Request) {
+  const { searchParams } = new URL(req.url);
+  const lat = Number(searchParams.get("lat"));
+  const lon = Number(searchParams.get("lon"));
+  const category = searchParams.get("category") || undefined;
+  const radius = Number(searchParams.get("radius")) || 10; // km
+  const where = category ? { category } : {};
+  const partners = await prisma.partner.findMany({ where, orderBy: { createdAt: "desc" } });
+  const withDistance = isFinite(lat) && isFinite(lon)
+    ? partners.map((p) => ({ ...p, distance: haversine(lat, lon, p.latitude, p.longitude) })).filter((p) => p.distance <= radius)
+    : partners.map((p) => ({ ...p, distance: null }));
+  withDistance.sort((a, b) => (a.distance ?? 0) - (b.distance ?? 0));
+  return NextResponse.json({ partners: withDistance });
+}
+
+