Yağış Geometrisi

import protobuf from "protobufjs";

async function fetchPrecipitationGeoJson({ eventIds, center, radius, token }) {
  // 1 — İkili yanıtı getir
  const response = await fetch("/v1/precipitations/geometry", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "Authorization": `Bearer ${token}`
    },
    body: JSON.stringify({ eventIds, center, radius })
  });

  if (!response.ok) throw new Error(`HTTP ${response.status}`);

  const bytes = new Uint8Array(await response.arrayBuffer());

  // 2 — Protobuf çözümle
  const root = await protobuf.load("geojson.proto");
  const PrecipitationFeatureCollection = root.lookupType(
    "PrecipitationFeatureCollection"
  );
  const fc = PrecipitationFeatureCollection.decode(bytes);

  // 3 — GeoJSON'a dönüştür
  return {
    type: "FeatureCollection",
    features: fc.features.map(f => ({
      type: "Feature",
      id: f.id,
      geometry: {
        type: "MultiPolygon",
        coordinates: f.geometry.multiPolygon.polygons.map(poly =>
          poly.rings.map(ring =>
            ring.coordinates.map(c => [c.lng, c.lat])
          )
        )
      },
      properties: {
        intensity:      f.properties.intensity,
        radarTimestamp: f.properties.radarTimestamp,
        forecast:       f.properties.forecast
      }
    }))
  };
}

// Kullanım
const geoJson = await fetchPrecipitationGeoJson({
  eventIds: ["69baa6b76e0fe76a1957273f", "4a1c3e9d8f2b07e5c6d4a1b2"],
  center:   { lat: 36.80, lng: 32.33 },
  radius:   25000,
  token:    "<token>"
});

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "id": "69baa6b76e0fe76a1957273f",
      "geometry": {
        "type": "MultiPolygon",
        "coordinates": [
          [
            [
              [32.33, 36.80],
              [32.34, 36.81],
              [32.35, 36.80],
              [32.33, 36.80]
            ]
          ]
        ]
      },
      "properties": {
        "intensity": "DRIZZLE",
        "radarTimestamp": 1773846600000,
        "forecast": false
      }
    },
    {
      "type": "Feature",
      "id": "4a1c3e9d8f2b07e5c6d4a1b2",
      "geometry": {
        "type": "MultiPolygon",
        "coordinates": [
          [
            [
              [32.36, 36.82],
              [32.37, 36.83],
              [32.38, 36.82],
              [32.36, 36.82]
            ]
          ]
        ]
      },
      "properties": {
        "intensity": "MODERATE",
        "radarTimestamp": 1773848400000,
        "forecast": true
      }
    }
  ]
}