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Add caching for travel forecasts so we don't hit APIs as hard

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This commit is contained in:
mrkmntal 2026-04-07 19:04:10 -04:00
commit c67809f62d
2 changed files with 38 additions and 25 deletions
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27
server/scripts/modules/utils/weather.mjs
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@ -16,7 +16,9 @@ const OPEN_METEO_RADAR_OBSERVATION_PARAMETERS = [
].join('&');
const OPEN_METEO_OBSERVATION_CACHE_TTL_MS = 10 * 60 * 1000;
const OPEN_METEO_TRAVEL_FORECAST_CACHE_TTL_MS = 30 * 60 * 1000;
const openMeteoObservationCache = new Map();
const openMeteoTravelForecastCache = new Map();
const getPoint = async (lat, lon) => {
const point = await safeJson(`https://api.weather.gov/points/${lat.toFixed(4)},${lon.toFixed(4)}`);
@ -58,6 +60,30 @@ const getAggregatedOpenMeteoForecast = async (lat, lon) => {
};
};
const getCachedAggregatedOpenMeteoForecast = async (lat, lon) => {
const cacheKey = `${lat.toFixed(4)},${lon.toFixed(4)}`;
const cachedEntry = openMeteoTravelForecastCache.get(cacheKey);
const now = Date.now();
if (cachedEntry && (now - cachedEntry.fetchedAt) < OPEN_METEO_TRAVEL_FORECAST_CACHE_TTL_MS) {
return cachedEntry.data;
}
const forecast = await getAggregatedOpenMeteoForecast(lat, lon);
if (forecast) {
openMeteoTravelForecastCache.set(cacheKey, {
data: forecast,
fetchedAt: now,
});
return forecast;
}
if (cachedEntry) {
return cachedEntry.data;
}
return false;
};
const getOpenMeteoObservationSnapshot = async (lat, lon) => {
const cacheKey = `${lat.toFixed(4)},${lon.toFixed(4)}`;
const cachedEntry = openMeteoObservationCache.get(cacheKey);
@ -199,6 +225,7 @@ export {
getPoint,
getOpenMeteoForecast,
getAggregatedOpenMeteoForecast,
getCachedAggregatedOpenMeteoForecast,
getOpenMeteoObservationSnapshot,
aggregateWeatherForecastData,
getConditionText,