M9mABf5s

1export async function calculateTripCost(from: Coords, to: Coords, numPassengers: number) {
2  try {
3    const res = await getDistanceAndDuration(from, to) // this is a google maps api for returning distance and duration
4    const { distance } = res
5    let { duration } = res
6
7    if (res.duration_in_traffic) {
8      duration = res.duration_in_traffic
9    }
10
11    const dist = distance.value * OneMeterToMile
12    const time = duration.value / 60.0
13    const bookingFee = (dist * HichNowCosts.costPerMile) / (time / Math.abs(dist - time))
14    const fareWithoutStripe = bookingFee + (dist / HichNowCosts.costPerMile)
15    const stripeFee = (fareWithoutStripe * HichNowCosts.stripePercentage) + HichNowCosts.stripeFixedCost
16    const cost = fareWithoutStripe + stripeFee
17
18    return { cost, distance, duration }
19  } catch (err) {
20    throw (err)
21  }
22}
23
24//
25async function getDistanceAndDuration(from: Coords, to: Coords) {
26  const options = {
27    qs: {
28      units: GoogleMaps.units,
29      origins: `${from.lat},${from.long}`,
30      destinations: `${to.lat},${to.long}`,
31      departure_time: "now",
32      key: GoogleMaps.apiKey
33    },
34    json: true
35  }
36
37  const response = await Request(GoogleMaps.url, options)
38  return response.rows[0].elements[0]
39}