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refactor: extract place-search and routing provider modules
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Sameh Khamis committed
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import { googleServerApiKey, keylessGooglePlacesResponse } from './google-key.js';
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import { makeOptInRateLimiter, clientKey } from '../common/rate-limit.js';
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import { projectNearbyPlaces, projectTextSearchPlaces } from '../../../src/data/placeProviderPayloads.js';
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// Construct lazily after the standalone environment has loaded.
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// undefined = not built yet; null = unlimited; fn = active limiter
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let _googleRateLimiter;
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/** Google cost endpoint (nearby-places). Null = unlimited (default). */
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function googleRateLimiter() {
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if (_googleRateLimiter === undefined) _googleRateLimiter = makeOptInRateLimiter(process.env.GEV_RATELIMIT_GOOGLE_PER_MIN);
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return _googleRateLimiter;
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}
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/** Nearby place labels and view-biased text search, with request-time key resolution. */
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export function googlePlacesContextProxy({ resolveApiKey = googleServerApiKey } = {}) {
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function install(middlewares) {
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middlewares.use('/api/google/nearby-places', async (req, res) => {
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if (req.method !== 'GET') {
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res.statusCode = 405;
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res.setHeader('Content-Type', 'application/json');
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res.end(JSON.stringify({ error: 'Method not allowed', places: [] }));
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return;
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}
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// Keyless place context has no provider cost, so it resolves before the
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// paid-endpoint limiter can consume or exhaust quota (mirrors the HUD
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// summary route).
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const apiKey = resolveApiKey();
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const keyless = keylessGooglePlacesResponse(apiKey);
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if (keyless) {
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res.statusCode = keyless.statusCode;
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res.setHeader('Content-Type', 'application/json');
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res.setHeader('Cache-Control', 'no-store');
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res.end(JSON.stringify(keyless.payload));
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return;
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}
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// Opt-in per-IP throttle (GEV_RATELIMIT_GOOGLE_PER_MIN). No-op when unset.
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// Inlined (not the shared helper) so the 429 body keeps this endpoint's
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// `places: []` contract that the client expects on every error response.
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const _grl = googleRateLimiter();
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if (_grl && !_grl(clientKey(req))) {
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res.statusCode = 429;
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res.setHeader('Content-Type', 'application/json');
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res.setHeader('Retry-After', '5');
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res.end(JSON.stringify({ error: 'Rate limit exceeded', places: [] }));
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return;
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}
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const requestUrl = new URL(req.url || '', 'http://localhost');
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const latitude = Number(requestUrl.searchParams.get('lat'));
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const longitude = Number(requestUrl.searchParams.get('lon'));
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const radiusM = Math.max(25, Math.min(5000, Number(requestUrl.searchParams.get('radiusM')) || 250));
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if (!Number.isFinite(latitude) || !Number.isFinite(longitude)) {
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res.statusCode = 400;
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res.setHeader('Content-Type', 'application/json');
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res.end(JSON.stringify({ error: 'Valid lat and lon are required', places: [] }));
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return;
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}
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try {
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const response = await fetch('https://places.googleapis.com/v1/places:searchNearby', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'X-Goog-Api-Key': apiKey,
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'X-Goog-FieldMask': [
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'places.id',
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'places.displayName',
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'places.formattedAddress',
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'places.shortFormattedAddress',
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'places.location',
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'places.primaryType',
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'places.primaryTypeDisplayName',
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'places.types',
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].join(','),
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},
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body: JSON.stringify({
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maxResultCount: 20,
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rankPreference: 'DISTANCE',
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locationRestriction: {
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circle: {
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center: { latitude, longitude },
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radius: radiusM,
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},
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},
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}),
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});
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const data = await response.json().catch(() => ({}));
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const places = projectNearbyPlaces(data, latitude, longitude);
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res.statusCode = response.ok ? 200 : response.status;
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res.setHeader('Content-Type', 'application/json; charset=utf-8');
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res.setHeader('Cache-Control', 'private, max-age=300');
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res.end(JSON.stringify({
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places,
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error: response.ok ? null : data.error?.message || 'Google Places request failed',
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}));
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} catch (error) {
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res.statusCode = 502;
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res.setHeader('Content-Type', 'application/json; charset=utf-8');
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res.end(JSON.stringify({ error: error?.message || 'Google Places request failed', places: [] }));
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}
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});
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// Text Search: resolve a named landmark/POI to a real coordinate, biased to
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// the view. Geocoding scatters obscure monument/POI names across the city;
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// a view-biased Text Search lands on the actual feature. Same key, field
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// mask, throttle, and `places: []` error contract as nearby-places above.
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middlewares.use('/api/google/text-search', async (req, res) => {
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if (req.method !== 'GET') {
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res.statusCode = 405;
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res.setHeader('Content-Type', 'application/json');
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res.end(JSON.stringify({ error: 'Method not allowed', places: [] }));
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return;
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}
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// Keyless place context has no provider cost, so it resolves before the
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// paid-endpoint limiter can consume or exhaust quota (mirrors the HUD
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// summary route).
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const apiKey = resolveApiKey();
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const keyless = keylessGooglePlacesResponse(apiKey);
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if (keyless) {
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res.statusCode = keyless.statusCode;
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res.setHeader('Content-Type', 'application/json');
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res.setHeader('Cache-Control', 'no-store');
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res.end(JSON.stringify(keyless.payload));
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return;
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}
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// Opt-in per-IP throttle (GEV_RATELIMIT_GOOGLE_PER_MIN). No-op when unset.
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// Inlined (like nearby-places) so the 429 body keeps the `places: []`
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// contract the client expects on every error response.
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const _grl = googleRateLimiter();
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if (_grl && !_grl(clientKey(req))) {
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res.statusCode = 429;
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res.setHeader('Content-Type', 'application/json');
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res.setHeader('Retry-After', '5');
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res.end(JSON.stringify({ error: 'Rate limit exceeded', places: [] }));
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return;
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}
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const requestUrl = new URL(req.url || '', 'http://localhost');
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const textQuery = String(requestUrl.searchParams.get('q') || '').trim();
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const latitude = Number(requestUrl.searchParams.get('lat'));
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const longitude = Number(requestUrl.searchParams.get('lon'));
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const radiusM = Math.max(50, Math.min(50000, Number(requestUrl.searchParams.get('radiusM')) || 4000));
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if (!textQuery || !Number.isFinite(latitude) || !Number.isFinite(longitude)) {
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res.statusCode = 400;
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res.setHeader('Content-Type', 'application/json');
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res.end(JSON.stringify({ error: 'q, lat and lon are required', places: [] }));
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return;
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}
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try {
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const response = await fetch('https://places.googleapis.com/v1/places:searchText', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'X-Goog-Api-Key': apiKey,
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'X-Goog-FieldMask': [
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'places.id',
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'places.displayName',
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'places.formattedAddress',
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'places.location',
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'places.viewport',
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'places.primaryType',
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'places.types',
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].join(','),
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},
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body: JSON.stringify({
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textQuery,
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locationBias: {
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circle: {
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center: { latitude, longitude },
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radius: radiusM,
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},
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},
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maxResultCount: 5,
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}),
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});
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const data = await response.json().catch(() => ({}));
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const places = projectTextSearchPlaces(data, latitude, longitude);
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res.statusCode = response.ok ? 200 : response.status;
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res.setHeader('Content-Type', 'application/json; charset=utf-8');
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res.setHeader('Cache-Control', 'private, max-age=300');
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res.end(JSON.stringify({
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places,
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error: response.ok ? null : data.error?.message || 'Google Places request failed',
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}));
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} catch (error) {
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res.statusCode = 502;
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res.setHeader('Content-Type', 'application/json; charset=utf-8');
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res.end(JSON.stringify({ error: error?.message || 'Google Places request failed', places: [] }));
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}
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});
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}
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return {
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name: 'google-places-context-proxy',
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configureServer(server) {
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install(server.middlewares);
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},
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configurePreviewServer(server) {
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install(server.middlewares);
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},
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};
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}
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