colouring-montreal/app/src/frontend/hooks/use-building-data.ts

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import { useCallback, useEffect, useState } from 'react';
import { Building } from '../models/building';
import { apiGet } from '../apiHelpers';
export function useBuildingData(buildingId: number, preloadedData: Building): [Building, (updatedBuilding: Building) => void, () => void] {
const [buildingData, setBuildingData] = useState<Building>(preloadedData);
const [isOld, setIsOld] = useState<boolean>(preloadedData == undefined);
const fetchData = useCallback(async () => {
if(buildingId == undefined) {
setBuildingData(undefined);
setIsOld(false);
return;
}
try {
const [building, buildingUprns] = await Promise.all([
apiGet(`/api/buildings/${buildingId}.json`),
apiGet(`/api/buildings/${buildingId}/uprns.json`)
]);
building.uprns = buildingUprns.uprns;
setBuildingData(building);
} catch(error) {
console.error(error);
// TODO: add UI for API errors
}
setIsOld(false);
}, [buildingId]);
useEffect(() => {
return () => {
setIsOld(true);
};
}, [buildingId]);
useEffect(() => {
if(isOld) {
fetchData();
}
}, [isOld]);
const reloadData = useCallback(() => setIsOld(true), []);
return [buildingData, setBuildingData, reloadData];
}