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import {
getCurrentPositionAsync,
type LocationGeocodedAddress,
reverseGeocodeAsync,
} from 'expo-location'
import {logger} from '#/state/geolocation/logger'
import {type DeviceLocation} from '#/state/geolocation/types'
import {type Device} from '#/storage'
/**
* Maps full US region names to their short codes.
*
* Context: in some cases, like on Android, we get the full region name instead
* of the short code. We may need to expand this in the future to other
* countries, hence the prefix.
*/
export const USRegionNameToRegionCode: {
[regionName: string]: string
} = {
Alabama: 'AL',
Alaska: 'AK',
Arizona: 'AZ',
Arkansas: 'AR',
California: 'CA',
Colorado: 'CO',
Connecticut: 'CT',
Delaware: 'DE',
Florida: 'FL',
Georgia: 'GA',
Hawaii: 'HI',
Idaho: 'ID',
Illinois: 'IL',
Indiana: 'IN',
Iowa: 'IA',
Kansas: 'KS',
Kentucky: 'KY',
Louisiana: 'LA',
Maine: 'ME',
Maryland: 'MD',
Massachusetts: 'MA',
Michigan: 'MI',
Minnesota: 'MN',
Mississippi: 'MS',
Missouri: 'MO',
Montana: 'MT',
Nebraska: 'NE',
Nevada: 'NV',
['New Hampshire']: 'NH',
['New Jersey']: 'NJ',
['New Mexico']: 'NM',
['New York']: 'NY',
['North Carolina']: 'NC',
['North Dakota']: 'ND',
Ohio: 'OH',
Oklahoma: 'OK',
Oregon: 'OR',
Pennsylvania: 'PA',
['Rhode Island']: 'RI',
['South Carolina']: 'SC',
['South Dakota']: 'SD',
Tennessee: 'TN',
Texas: 'TX',
Utah: 'UT',
Vermont: 'VT',
Virginia: 'VA',
Washington: 'WA',
['West Virginia']: 'WV',
Wisconsin: 'WI',
Wyoming: 'WY',
}
/**
* Normalizes a `LocationGeocodedAddress` into a `DeviceLocation`.
*
* We don't want or care about the full location data, so we trim it down and
* normalize certain fields, like region, into the format we need.
*/
export function normalizeDeviceLocation(
location: LocationGeocodedAddress,
): DeviceLocation {
let {isoCountryCode, region} = location
if (region) {
if (isoCountryCode === 'US') {
region = USRegionNameToRegionCode[region] ?? region
}
}
return {
countryCode: isoCountryCode ?? undefined,
regionCode: region ?? undefined,
}
}
/**
* Combines precise location data with the geolocation config fetched from the
* IP service, with preference to the precise data.
*/
export function mergeGeolocation(
location?: DeviceLocation,
config?: Device['geolocation'],
): DeviceLocation {
if (location?.countryCode) return location
return {
countryCode: config?.countryCode,
regionCode: config?.regionCode,
}
}
/**
* Computes the geolocation status (age-restricted, age-blocked) based on the
* given location and geolocation config. `location` here should be merged with
* `mergeGeolocation()` ahead of time if needed.
*/
export function computeGeolocationStatus(
location: DeviceLocation,
config: Device['geolocation'],
) {
/**
* We can't do anything if we don't have this data.
*/
if (!location.countryCode) {
return {
...location,
isAgeRestrictedGeo: false,
isAgeBlockedGeo: false,
}
}
const isAgeRestrictedGeo = config?.ageRestrictedGeos?.some(rule => {
if (rule.countryCode === location.countryCode) {
if (!rule.regionCode) {
return true // whole country is blocked
} else if (rule.regionCode === location.regionCode) {
return true
}
}
})
const isAgeBlockedGeo = config?.ageBlockedGeos?.some(rule => {
if (rule.countryCode === location.countryCode) {
if (!rule.regionCode) {
return true // whole country is blocked
} else if (rule.regionCode === location.regionCode) {
return true
}
}
})
return {
...location,
isAgeRestrictedGeo: !!isAgeRestrictedGeo,
isAgeBlockedGeo: !!isAgeBlockedGeo,
}
}
export async function getDeviceGeolocation(): Promise<DeviceLocation> {
try {
const geocode = await getCurrentPositionAsync()
const locations = await reverseGeocodeAsync({
latitude: geocode.coords.latitude,
longitude: geocode.coords.longitude,
})
const location = locations.at(0)
const normalized = location ? normalizeDeviceLocation(location) : undefined
return {
countryCode: normalized?.countryCode ?? undefined,
regionCode: normalized?.regionCode ?? undefined,
}
} catch (e) {
logger.error('getDeviceGeolocation: failed', {
safeMessage: e,
})
return {
countryCode: undefined,
regionCode: undefined,
}
}
}
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