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Added the in-memory TTL caching for RainViewer and OpenMeteo

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This commit is contained in:
mrkmntal 2026-04-07 18:32:07 -04:00
commit bb87c836b6
2 changed files with 52 additions and 8 deletions
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37
server/scripts/modules/radar.mjs
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@ -11,9 +11,37 @@ import {
clearMarkers,
} from './utils/leaflet-weather-map.mjs';
class Radar extends WeatherDisplay {
static metadataUrl = 'https://api.rainviewer.com/public/weather-maps.json';
const RADAR_METADATA_URL = 'https://api.rainviewer.com/public/weather-maps.json';
const RADAR_METADATA_CACHE_TTL_MS = 2 * 60 * 1000;
let radarMetadataCache = null;
const getRadarMetadataCached = async (stillWaiting) => {
const now = Date.now();
if (radarMetadataCache && (now - radarMetadataCache.fetchedAt) < RADAR_METADATA_CACHE_TTL_MS) {
return radarMetadataCache.data;
}
const radarMetadata = await safeJson(RADAR_METADATA_URL, {
retryCount: 2,
stillWaiting,
});
if (radarMetadata?.host && radarMetadata?.radar?.past?.length) {
radarMetadataCache = {
data: radarMetadata,
fetchedAt: now,
};
return radarMetadata;
}
if (radarMetadataCache) {
return radarMetadataCache.data;
}
return null;
};
class Radar extends WeatherDisplay {
constructor(navId, elemId) {
super(navId, elemId, 'Local Radar');
@ -48,10 +76,7 @@ class Radar extends WeatherDisplay {
this.updateLocationMarker();
await this.updateNearbyMarkers();
const radarMetadata = await safeJson(Radar.metadataUrl, {
retryCount: 2,
stillWaiting: () => this.stillWaiting(),
});
const radarMetadata = await getRadarMetadataCached(() => this.stillWaiting());
const frames = radarMetadata?.radar?.past?.slice(-this.maxFrames) ?? [];
if (!frames.length || !radarMetadata?.host) {