func uberAPI(carRes *structure.CarResponse, tripData structure.DataStorage, startLat float64, startLng float64, endLat float64, endLng float64) {
minPrice := 0
// Server token should be kept safe from others
serverToken := "PLEASE PUT YOUR OWN SERVER TOKEN HERE"
urlLeft := "https://api.uber.com/v1/estimates/price?"
urlRight := "start_latitude=" + strconv.FormatFloat(startLat, 'f', -1, 64) + "&start_longitude=" + strconv.FormatFloat(startLng, 'f', -1, 64) + "&end_latitude=" + strconv.FormatFloat(endLat, 'f', -1, 64) + "&end_longitude=" + strconv.FormatFloat(endLng, 'f', -1, 64) + "&server_token=" + serverToken
urlFormat := urlLeft + urlRight
var userrequest structure.UserRequest
getPrices, err := http.Get(urlFormat)
if err != nil {
fmt.Println("Get Prices Error", err)
panic(err)
}
var data structure.UberAPIResponse
index := 0
json.NewDecoder(getPrices.Body).Decode(&data)
minPrice = data.Prices[0].LowEstimate
for i := 0; i < len(data.Prices); i++ {
if minPrice > data.Prices[i].LowEstimate {
minPrice = data.Prices[i].LowEstimate
index = i
}
userrequest.Product_id = data.Prices[index].ProductID
}
urlPath := "https://sandbox-api.uber.com/v1/requests"
userrequest.Start_latitude = startLat
userrequest.Start_longitude = startLng
userrequest.End_latitude = endLat
userrequest.End_longitude = endLng
// accessToken cannot be told to others, therefore I leave this line empty
accessToken := "PLEASE PUT YOUR OWN ACCESSTOKEN HERE"
requestbody, _ := json.Marshal(userrequest)
client := &http.Client{}
req, err := http.NewRequest("POST", urlPath, bytes.NewBuffer(requestbody))
if err != nil {
fmt.Println(err)
return
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Authorization", "Bearer "+accessToken)
res, err := client.Do(req)
if err != nil {
fmt.Println("QueryInfo: http.Get", err)
return
}
defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
uberRes := structure.UberResponse{}
json.Unmarshal(body, &uberRes)
fmt.Println(uberRes)
carRes.Uber_wait_time_eta = uberRes.Eta
}
func CarRequest(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
tId := p.ByName("trip_id")
checkID, _ := strconv.Atoi(tId)
var tripData structure.DataStorage
findTarget := false
for key, value := range hmap {
if key == checkID {
tripData = value
findTarget = true
}
}
if findTarget == false {
w.WriteHeader(404)
return
}
var startLat float64
var startLng float64
var endLat float64
var endLng float64
carRes := structure.CarResponse{}
response := structure.Response{}
if tripData.Index == 0 {
if err := session.DB("cmpe273_project").C("hello").FindId(tripData.Starting_from_location_id).One(&response); err != nil {
return
}
startLat = response.Coordinate.Lat
startLng = response.Coordinate.Lng
if err := session.DB("cmpe273_project").C("hello").FindId(tripData.Best_route_location_id[0]).One(&response); err != nil {
return
}
endLat = response.Coordinate.Lat
endLng = response.Coordinate.Lng
uberAPI(&carRes, tripData, startLat, startLng, endLat, endLng)
carRes.Status = "requesting"
carRes.Starting_from_location_id = tripData.Starting_from_location_id
carRes.Next_destination_location_id = tripData.Best_route_location_id[0]
} else if tripData.Index == len(tripData.Best_route_location_id) {
if err := session.DB("cmpe273_project").C("hello").FindId(tripData.Best_route_location_id[len(tripData.Best_route_location_id)-1]).One(&response); err != nil {
return
}
startLat = response.Coordinate.Lat
startLng = response.Coordinate.Lng
if err := session.DB("cmpe273_project").C("hello").FindId(tripData.Starting_from_location_id).One(&response); err != nil {
return
}
endLat = response.Coordinate.Lat
endLng = response.Coordinate.Lng
uberAPI(&carRes, tripData, startLat, startLng, endLat, endLng)
carRes.Status = "requesting"
carRes.Starting_from_location_id = tripData.Best_route_location_id[len(tripData.Best_route_location_id)-1]
carRes.Next_destination_location_id = tripData.Starting_from_location_id
} else if tripData.Index > len(tripData.Best_route_location_id) {
carRes.Status = "finished"
carRes.Starting_from_location_id = tripData.Starting_from_location_id
carRes.Next_destination_location_id = tripData.Starting_from_location_id
} else {
if err := session.DB("cmpe273_project").C("hello").FindId(tripData.Best_route_location_id[tripData.Index-1]).One(&response); err != nil {
return
}
startLat = response.Coordinate.Lat
startLng = response.Coordinate.Lng
if err := session.DB("cmpe273_project").C("hello").FindId(tripData.Best_route_location_id[tripData.Index]).One(&response); err != nil {
return
}
endLat = response.Coordinate.Lat
endLng = response.Coordinate.Lng
uberAPI(&carRes, tripData, startLat, startLng, endLat, endLng)
carRes.Status = "requesting"
carRes.Starting_from_location_id = tripData.Best_route_location_id[tripData.Index-1]
carRes.Next_destination_location_id = tripData.Best_route_location_id[tripData.Index]
}
carRes.Id = tripData.Id
carRes.Best_route_location_id = tripData.Best_route_location_id
carRes.Total_uber_costs = tripData.Total_uber_costs
carRes.Total_uber_duration = tripData.Total_uber_duration
carRes.Total_distance = tripData.Total_distance
tripData.Index = tripData.Index + 1
hmap[tripData.Id] = tripData
trip, _ := json.Marshal(carRes)
w.WriteHeader(200)
fmt.Fprintf(w, "%s", trip)
}