b45e69885d
Replace the planner's Overpass proxy with a self-hosted POI index: - map-core POI categories become structured tag selectors (single source of truth) + osmium filter / classification helpers - planner.pois PostGIS table (centroid points, GiST + category indexes) - /api/pois serving route (session + same-origin + rate limit, 100 cap) - lib/pois.ts client (renamed from overpass.ts; GET, quantized bbox) - metrics: poi_api_requests_total + DB-collected index rows/age gauges; drop overpass_* metrics - remove /api/overpass proxy + dead OVERPASS_URLS on the planner service (Journal surface backfill still uses it via code default) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
65 lines
1.9 KiB
TypeScript
65 lines
1.9 KiB
TypeScript
import type { Poi } from "./pois.ts";
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import { SNAP_DISTANCE_METERS } from "@trails-cool/map-core";
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export interface SnapResult {
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lat: number;
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lon: number;
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name?: string;
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snapped: boolean;
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/** OSM node ID if snapped */
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osmId?: number;
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/** Key POI tags if snapped */
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poiTags?: Record<string, string>;
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}
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/**
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* Snap a coordinate to the nearest visible POI if within threshold.
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* Returns the snapped position and POI name, or the original position.
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*/
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export function snapToPoi(lat: number, lon: number, pois: Poi[]): SnapResult {
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if (pois.length === 0) return { lat, lon, snapped: false };
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let bestPoi: Poi | null = null;
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let bestDist = Infinity;
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for (const poi of pois) {
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const dist = haversine(lat, lon, poi.lat, poi.lon);
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if (dist < bestDist) {
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bestDist = dist;
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bestPoi = poi;
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}
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}
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if (bestPoi && bestDist <= SNAP_DISTANCE_METERS) {
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// Pick key tags worth persisting with the waypoint
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const keepTags = ["phone", "contact:phone", "website", "opening_hours",
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"addr:street", "addr:housenumber", "addr:postcode", "addr:city",
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"description", "amenity", "tourism", "shop"];
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const poiTags: Record<string, string> = {};
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for (const key of keepTags) {
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if (bestPoi.tags[key]) poiTags[key] = bestPoi.tags[key];
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}
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return {
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lat: bestPoi.lat,
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lon: bestPoi.lon,
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name: bestPoi.name,
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snapped: true,
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osmId: bestPoi.id,
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poiTags: Object.keys(poiTags).length > 0 ? poiTags : undefined,
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};
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}
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return { lat, lon, snapped: false };
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}
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function haversine(lat1: number, lon1: number, lat2: number, lon2: number): number {
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const R = 6371000;
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const toRad = (d: number) => (d * Math.PI) / 180;
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const dLat = toRad(lat2 - lat1);
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const dLon = toRad(lon2 - lon1);
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const a =
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Math.sin(dLat / 2) ** 2 +
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Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * Math.sin(dLon / 2) ** 2;
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return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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}
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