function fetchDistanceAndDuration(origins, destinations) {

const googleService = new google.maps.DistanceMatrixService()

// const promiseGoogleService = Promise.promisifyAll(, { promisifier: noErrPromisifier })

const matrixParams = {

origins,

destinations: destinations,

travelMode: google.maps.TravelMode.WALKING,

durationInTraffic: true,

avoidHighways: true,

avoidTolls: false,

unitSystem: google.maps.UnitSystem.IMPERIAL,

}

return new Promise((resolve, reject) => {

// Put all your code here, this section is throw-safe.

googleService.getDistanceMatrix(matrixParams, (response, status) => (

status == google.maps.DistanceMatrixStatus.OK ? resolve(response) :

reject(status)))

})

}

export function calculateDistance(location, currentLocation) {

const pos = new google.maps.LatLng(location.latitude, location.longitude)

const { latitude, longitude } = currentLocation.coords

const googleLocation = new google.maps.LatLng(latitude, longitude)

return fetchDistanceAndDuration([googleLocation], [pos])

}

export function calculateAllDistances(locations, currentLocation) {

const { latitude, longitude } = currentLocation.coords

const origins = [new google.maps.LatLng(latitude, longitude)]

const destinations = locations.map(location => (

new google.maps.LatLng(

location.latitude,

location.longitude

)))

return fetchDistanceAndDuration(origins, destinations)

}