// decodeLocations takes a location argument string and decodes it.
// This argument has three different forms, as per documentation at
// https://developers.google.com/maps/documentation/elevation/#Locations
func decodeLocations(location string) ([]maps.LatLng, error) {
if strings.HasPrefix(location, "enc:") {
return maps.DecodePolyline(location[len("enc:"):]), nil
}
if strings.Contains(location, "|") {
return maps.ParseLatLngList(location)
}
// single location
ll, err := maps.ParseLatLng(location)
check(err)
return []maps.LatLng{ll}, nil
}
// decodePath takes a location argument string and decodes it.
// This argument has two different forms, as per documentation at
// https://developers.google.com/maps/documentation/elevation/#Paths
func decodePath(path string) ([]maps.LatLng, error) {
if strings.HasPrefix(path, "enc:") {
return maps.DecodePolyline(path[len("enc:"):]), nil
}
result := []maps.LatLng{}
if strings.Contains(path, "|") {
// | delimited list of locations
ls := strings.Split(path, "|")
for _, l := range ls {
ll, err := maps.ParseLatLng(l)
check(err)
result = append(result, ll)
}
return result, nil
}
return result, fmt.Errorf("Invalid Path argument: '%s'", path)
}