GoogleMaps.swift

/*
Get animated polyline route:
- https://stackoverflow.com/questions/42620510/how-to-get-animated-polyline-route-in-gmsmapview-so-that-it-move-along-with-map

Get polyline from origin and destination coordinates:
- https://github.com/lukagabric/LRouteController/blob/master/LRouteControllerSample/Classes/LRouteController/LRouteController.m

Draw stroke with some style:

var styles:[GMSStrokeStyle] = [GMSStrokeStyle.solidColor(UIColor.cyan), GMSStrokeStyle.solidColor(UIColor.clear)]
let polilyne = GMSPolyline(path: path)
polilyne.spans = GMSStyleSpans(path, styles, [20, 20], .rhumb)

*/

// Google Maps example:

import UIKit
import GoogleMaps
import Alamofire

class ViewController: UIViewController {
    var mapView: GMSMapView!
    public typealias ApiData = Dictionary<String, Any>
    public typealias ArrayApiData = Array<ApiData>


    func presentaRutas(origen: CLLocationCoordinate2D, destino: CLLocationCoordinate2D, mode: String, color: UIColor) {

        let url = "https://maps.googleapis.com/maps/api/directions/json"

        var requestParameters: [String : Any] = [:]
        requestParameters["origin"] = "\(origen.latitude),\(origen.longitude)"
        requestParameters["destination"] = "\(destino.latitude),\(destino.longitude)"
        requestParameters["sensor"] = "false"
        requestParameters["mode"] = mode
        requestParameters["key"] = "XXXXXXXXXXXXXXXXXXXXXXXXXXX"

        Alamofire.request(url, method: .get, parameters: requestParameters).responseJSON { response in
            guard response.result.isSuccess,
                let data = response.result.value as? ApiData,
                let routes = data["routes"] as? ArrayApiData,
                routes.count > 0,
                let first = routes.first as? ApiData,
                let overview = first["overview_polyline"] as? ApiData,
                let points = overview["points"] as? String,
            	let path = GMSPath(fromEncodedPath: points) else {
                    return
            }

            let gsm = GMSPolyline(path: path)
            gsm.strokeColor = color
            gsm.strokeWidth = 4

            if mode == "walking" {
                var styles:[GMSStrokeStyle] = [GMSStrokeStyle.solidColor(UIColor.cyan), GMSStrokeStyle.solidColor(UIColor.clear)]
                gsm.spans = GMSStyleSpans(path, styles, [20, 20], .rhumb)
            }

            gsm.map = self.mapView
        }
    }

    override func loadView() {
        navigationItem.title = "Hello Map"

        let camera = GMSCameraPosition.camera(withLatitude: 40.4192079,
                                              longitude: -3.6961897999999564,
                                              zoom: 16)
        mapView = GMSMapView.map(withFrame: .zero, camera: camera)



        //let marker = GMSMarker()
        //marker.position = camera.target
        //marker.snippet = "Hello World"
        //marker.appearAnimation = .pop
        //marker.map = mapView

        view = mapView

        presentaRutas(origen: CLLocationCoordinate2DMake(40.4172679, -3.7010867999999846), destino: CLLocationCoordinate2DMake(40.4124759, -3.700625500000001), mode: "walking", color: UIColor.blue.withAlphaComponent(0.50))

        presentaRutas(origen: CLLocationCoordinate2DMake(40.4124759, -3.700625500000001), destino: CLLocationCoordinate2DMake(40.4320996, -3.663307400000008), mode: "bicycling", color: UIColor.red.withAlphaComponent(0.40))

        presentaRutas(origen: CLLocationCoordinate2DMake(40.4320996, -3.663307400000008), destino: CLLocationCoordinate2DMake(40.393910805867925, -3.9304579600873364), mode: "optimistic", color: UIColor.green.withAlphaComponent(0.40))

    }
}