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import {useEffect, useRef} from 'react'
import * as Location from 'expo-location'
import {logger} from '#/state/geolocation/logger'
import {getDeviceGeolocation} from '#/state/geolocation/util'
import {device, useStorage} from '#/storage'
/**
* Hook to get and sync the device geolocation from the device GPS and store it
* using device storage. If permissions are not granted, it will clear any cached
* storage value.
*/
export function useSyncedDeviceGeolocation() {
const synced = useRef(false)
const [status] = Location.useForegroundPermissions()
const [deviceGeolocation, setDeviceGeolocation] = useStorage(device, [
'deviceGeolocation',
])
useEffect(() => {
async function get() {
// no need to set this more than once per session
if (synced.current) return
logger.debug('useSyncedDeviceGeolocation: checking perms')
if (status?.granted) {
const location = await getDeviceGeolocation()
if (location) {
logger.debug('useSyncedDeviceGeolocation: syncing location')
setDeviceGeolocation(location)
synced.current = true
}
} else {
const hasCachedValue = device.get(['deviceGeolocation']) !== undefined
/**
* If we have a cached value, but user has revoked permissions,
* quietly (will take effect lazily) clear this out.
*/
if (hasCachedValue) {
logger.debug(
'useSyncedDeviceGeolocation: clearing cached location, perms revoked',
)
device.set(['deviceGeolocation'], undefined)
}
}
}
get().catch(e => {
logger.error('useSyncedDeviceGeolocation: failed to sync', {
safeMessage: e,
})
})
}, [status, setDeviceGeolocation])
return [deviceGeolocation, setDeviceGeolocation] as const
}
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