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