fix(map): group collocated user markers

2026-08-01 21:24:49 -04:00
parent ebc7c7df17
commit aa0b757814
10 changed files with 176 additions and 31 deletions
@@ -33,6 +33,32 @@ export function parseUserLocation(value: unknown): ParsedUserLocation | null {
  return { latitude, longitude, label: label || "Approximate location unavailable" };
 }

+export function groupMapLocations<T extends {
+  latitude: number;
+  longitude: number;
+  nickname: string;
+}>(locations: T[]) {
+  const grouped = new Map<string, { latitude: number; longitude: number; locations: T[] }>();
+  for (const location of locations) {
+    const roundedLatitude = Number(location.latitude.toFixed(2));
+    const latitude = roundedLatitude === 0 ? 0 : roundedLatitude;
+    const roundedLongitude = Number(location.longitude.toFixed(2));
+    const longitude = Math.abs(roundedLongitude) === 180 ? -180 : roundedLongitude;
+    const key = `${latitude}:${longitude}`;
+    const group = grouped.get(key);
+    if (group) group.locations.push(location);
+    else grouped.set(key, { latitude, longitude, locations: [location] });
+  }
+  return [...grouped.entries()].map(([key, group]) => ({
+    key,
+    latitude: group.latitude,
+    longitude: group.longitude,
+    count: group.locations.length,
+    nicknames: [...group.locations.map((location) => location.nickname)].sort((left, right) => left.localeCompare(right)),
+    locations: group.locations,
+  }));
+}
+
 export function projectWorldPoint(latitude: number, longitude: number, width: number, height: number) {
  return {
    x: ((longitude + 180) / 360) * width,