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import { LngLat } from "maplibre-gl";
import { useRouter } from "next/router";
import Sentry from "platform/sentry";
import {
Dispatch,
MutableRefObject,
SetStateAction,
useCallback,
useEffect,
useRef,
useState,
} from "react";
import { useTranslation } from "react-i18next";
import { service } from "service";
import {
filterDuplicatePlaces,
NominatimPlace,
simplifyPlaceDisplayName,
} from "utils/nominatim";
// Locations having one of these keys are considered non-regions.
// https://nominatim.org/release-docs/latest/api/Output/#addressdetails
const nonRegionKeys = [
"municipality",
"city",
"town",
"village",
"city_district",
"district",
"borough",
"suburb",
"subdivision",
];
/**
* @deprecated use useIsClient instead. This pattern should only be used as a last resort
* (e.g. to avoid hydration errors) as in most cases, render logic should not depend on the client being mounted.
*/
function useIsMounted() {
const isMounted = useRef(false);
useEffect(() => {
isMounted.current = true;
return () => {
isMounted.current = false;
};
}, []);
return isMounted;
}
function useSafeState<State>(
isMounted: MutableRefObject<boolean>,
initialState: State | (() => State),
): [State, Dispatch<SetStateAction<State>>] {
const [state, setState] = useState(initialState);
const safeSetState = useCallback(
(newState: SetStateAction<State>) => {
if (isMounted.current) {
setState(newState);
}
},
[isMounted],
);
return [state, safeSetState];
}
function useIsClient() {
const [isClient, setIsClient] = useState(false);
useEffect(() => setIsClient(true), []);
return isClient;
}
export interface GeocodeResult {
name: string;
simplifiedName: string;
location: LngLat;
bbox: Coordinates;
isRegion?: boolean;
}
const NOMINATIM_URL = process.env.NEXT_PUBLIC_NOMINATIM_URL;
const useGeocodeQuery = () => {
const isMounted = useIsMounted();
const {
i18n: { languages: locales },
} = useTranslation();
const [isLoading, setIsLoading] = useSafeState(isMounted, false);
const [error, setError] = useSafeState<string | undefined>(
isMounted,
undefined,
);
const [results, setResults] = useSafeState<GeocodeResult[] | undefined>(
isMounted,
undefined,
);
const query = useCallback(
async (value: string) => {
Iif (!value) {
return;
}
setIsLoading(true);
setError(undefined);
setResults(undefined);
// Refer to https://nominatim.org/release-docs/latest/api/Search/
const queryArgs = new URLSearchParams({
format: "jsonv2",
q: value,
addressdetails: "1", // include a breakdown of the address into elements
"accept-language": locales.join(","),
});
const url = `${NOMINATIM_URL!}search?${queryArgs}`;
const fetchOptions = {
headers: {
Accept: "application/json",
},
method: "GET",
};
try {
const startTime = performance.now();
const response = await fetch(url, fetchOptions);
if (!response.ok) throw Error(await response.text());
const nominatimResults: NominatimPlace[] = await response.json();
Iif (nominatimResults.length === 0) {
setResults([]);
} else {
const filteredResults = filterDuplicatePlaces(nominatimResults);
const formattedResults = filteredResults.map((result) => {
const firstElem = result["boundingbox"].shift() as number;
const lastElem = result["boundingbox"].pop() as number;
result["boundingbox"].push(firstElem);
result["boundingbox"].unshift(lastElem);
return {
location: new LngLat(
Number(result["lon"]),
Number(result["lat"]),
),
name: result["display_name"],
simplifiedName: simplifyPlaceDisplayName(result),
isRegion: !nonRegionKeys.some((k) => k in result.address),
bbox: result["boundingbox"],
};
});
service.bugs.geolocationSearchInfo({
searchString: value,
nominatimResultJson: JSON.stringify(nominatimResults),
formattedResultJson: JSON.stringify(formattedResults),
durationMs: performance.now() - startTime,
});
setResults(formattedResults);
}
} catch (e) {
Sentry.captureException(e, {
tags: {
hook: "useGeocodeQuery",
},
});
setError(e instanceof Error ? e.message : "");
}
setIsLoading(false);
},
[locales, setError, setIsLoading, setResults],
);
return { isLoading, error, results, query };
};
function useUnsavedChangesWarning({
isDirty,
isSubmitted,
warningMessage,
}: {
isDirty: boolean;
isSubmitted: boolean;
warningMessage: string;
}) {
const router = useRouter();
// https://github.com/vercel/next.js/issues/2694#issuecomment-732990201
useEffect(() => {
const handleWindowClose = (e: BeforeUnloadEvent) => {
Iif (!isDirty) return;
e.preventDefault();
e.returnValue = warningMessage;
return;
};
const handleBrowseAway = () => {
Iif (!isDirty || isSubmitted) return;
// Note: window.confirm() shows browser's default "The page at [url] says:" title
// This cannot be customized as next.js pages router does not offer useBlocker hook
Iif (window.confirm(warningMessage)) return;
router.events.emit("routeChangeError");
throw Error("Cancelled due to unsaved changes");
};
window.addEventListener("beforeunload", handleWindowClose);
router.events.on("routeChangeStart", handleBrowseAway);
return () => {
window.removeEventListener("beforeunload", handleWindowClose);
router.events.off("routeChangeStart", handleBrowseAway);
};
}, [isDirty, router.events, isSubmitted, warningMessage]);
}
export {
useGeocodeQuery,
useIsClient,
useIsMounted,
useSafeState,
useUnsavedChangesWarning,
};
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