89 lines
3.3 KiB
TypeScript
89 lines
3.3 KiB
TypeScript
import { NextRequest, NextResponse } from "next/server";
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import { sql } from "@/lib/db";
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import { PROFILE_IDS } from "@transportationer/shared";
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export const runtime = "nodejs";
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const VALID_MODES = ["walking", "cycling", "driving"];
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const VALID_THRESHOLDS = [5, 8, 10, 12, 15, 20, 25, 30];
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export async function GET(
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req: NextRequest,
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{ params }: { params: Promise<{ tile: string[] }> },
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) {
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const { tile } = await params;
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if (tile.length !== 3) {
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return new NextResponse("Invalid tile path", { status: 400 });
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}
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const z = parseInt(tile[0], 10);
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const x = parseInt(tile[1], 10);
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const y = parseInt(tile[2], 10);
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if ([z, x, y].some(isNaN)) {
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return new NextResponse("Invalid tile coordinates", { status: 400 });
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}
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const p = req.nextUrl.searchParams;
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const city = p.get("city") ?? "";
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const mode = p.get("mode") ?? "walking";
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const threshold = parseInt(p.get("threshold") ?? "15", 10);
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const profile = p.get("profile") ?? "universal";
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if (!city) return new NextResponse("Missing city", { status: 400 });
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if (!VALID_MODES.includes(mode)) return new NextResponse("Invalid mode", { status: 400 });
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const validProfile = (PROFILE_IDS as readonly string[]).includes(profile) ? profile : "universal";
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const closestThreshold = VALID_THRESHOLDS.reduce((prev, curr) =>
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Math.abs(curr - threshold) < Math.abs(prev - threshold) ? curr : prev,
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);
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try {
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const rows = await Promise.resolve(sql<{ mvt: Uint8Array }[]>`
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WITH
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envelope AS (SELECT ST_TileEnvelope(${z}, ${x}, ${y}) AS env),
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city_info AS (SELECT COALESCE(resolution_m, 200) AS resolution_m FROM cities WHERE slug = ${city})
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SELECT ST_AsMVT(t, 'grid', 4096, 'geom') AS mvt
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FROM (
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SELECT
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ST_AsMVTGeom(
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ST_Expand(ST_Transform(gp.geom, 3857), ci.resolution_m::float / 2),
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e.env,
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4096, 0, true
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) AS geom,
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MAX(gs.score) FILTER (WHERE gs.category = 'service_trade') AS score_service_trade,
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MAX(gs.score) FILTER (WHERE gs.category = 'transport') AS score_transport,
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MAX(gs.score) FILTER (WHERE gs.category = 'work_school') AS score_work_school,
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MAX(gs.score) FILTER (WHERE gs.category = 'culture_community') AS score_culture_community,
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MAX(gs.score) FILTER (WHERE gs.category = 'recreation') AS score_recreation
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FROM grid_points gp
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JOIN grid_scores gs ON gs.grid_point_id = gp.id
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CROSS JOIN envelope e
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CROSS JOIN city_info ci
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WHERE gp.city_slug = ${city}
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AND gs.travel_mode = ${mode}
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AND gs.threshold_min = ${closestThreshold}
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AND gs.profile = ${validProfile}
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AND ST_Intersects(
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ST_Transform(gp.geom, 3857),
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ST_Expand(e.env, ci.resolution_m::float / 2)
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)
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GROUP BY gp.id, gp.geom, e.env, ci.resolution_m
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) t
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WHERE t.geom IS NOT NULL
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`);
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const buf = rows[0]?.mvt;
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const data = buf ? new Uint8Array(buf) : new Uint8Array(0);
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return new NextResponse(data, {
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headers: {
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"Content-Type": "application/x-protobuf",
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"Cache-Control": "public, max-age=300",
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"Access-Control-Allow-Origin": "*",
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},
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});
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} catch (err) {
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console.error("[tiles/grid] Error:", err);
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return new NextResponse("Internal Server Error", { status: 500 });
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}
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}
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