import { useState, useEffect } from "react";
import { Alert, Linking } from "react-native";
import * as Location from "expo-location";
export interface LocationCoords {
latitude: number;
longitude: number;
}
export function useLocation() {
const [hasPermission, setHasPermission] = useState<boolean | null>(null);
const [currentLocation, setCurrentLocation] = useState<LocationCoords | null>(null);
const [isLocating, setIsLocating] = useState(false);
// Initial check for permission on mount
useEffect(() => {
Location.getForegroundPermissionsAsync().then((status) => {
if (status.granted) {
setHasPermission(true);
}
});
}, []);
/**
* The core logic to check, request, and fetch location.
* Returns the coordinates if successful, or null otherwise.
*/
const requestLocation = async (onSuccess?: (coords: LocationCoords) => void) => {
if (isLocating) return null;
setIsLocating(true);
try {
// 2. Check current location permission status
const { status, canAskAgain } = await Location.getForegroundPermissionsAsync();
let finalStatus = status;
// 3. Branch based on permission state
if (status !== "granted") {
if (canAskAgain) {
// CASE — Permission NOT granted, but askable
const { status: newStatus } = await Location.requestForegroundPermissionsAsync();
finalStatus = newStatus;
} else {
// CASE — Permission BLOCKED
setHasPermission(false);
Alert.alert(
"Location Access Disabled",
"Location access is disabled. Please enable it in Settings to use this feature.",
[
{ text: "Cancel", style: "cancel" },
{ text: "Open Settings", onPress: () => Linking.openSettings() },
]
);
return null;
}
}
if (finalStatus === "granted") {
// CASE — Permission already GRANTED (or just granted)
setHasPermission(true);
// 4. Fetch current device location
const location = await Location.getCurrentPositionAsync({
accuracy: Location.Accuracy.High,
});
const coords: LocationCoords = {
latitude: location.coords.latitude,
longitude: location.coords.longitude,
};
console.log("Fetched Coordinates:", coords);
// 5. Update screen's location state
setCurrentLocation(coords);
// Allow the caller to run extra logic (like camera animation)
onSuccess?.(coords);
return coords;
} else {
setHasPermission(false);
return null;
}
} catch (error) {
console.error("Error fetching location:", error);
Alert.alert("Error", "Could not fetch your current location. Please try again.");
return null;
} finally {
setIsLocating(false);
}
};
return {
hasPermission,
currentLocation,
isLocating,
requestLocation,
};
}
