Route lines styling

1import UIKit
2import NbmapNavigation
3import NbmapCoreNavigation
4import NbmapDirections
5
6class RouteLinesStylingViewController: UIViewController {
7  
8   typealias ActionHandler = (UIAlertAction) -> Void
9  
10   var trafficUnknownColor: UIColor =  #colorLiteral(red: 0.1843137255, green: 0.4784313725, blue: 0.7764705882, alpha: 1)
11   var trafficLowColor: UIColor =  #colorLiteral(red: 0.1843137255, green: 0.4784313725, blue: 0.7764705882, alpha: 1)
12   var trafficModerateColor: UIColor =  #colorLiteral(red: 1, green: 0.5843137255, blue: 0, alpha: 1)
13   var trafficHeavyColor: UIColor =  #colorLiteral(red: 1, green: 0.3019607843, blue: 0.3019607843, alpha: 1)
14   var trafficSevereColor: UIColor = #colorLiteral(red: 0.5607843137, green: 0.1411764706, blue: 0.2784313725, alpha: 1)
15   var routeCasingColor: UIColor = #colorLiteral(red: 0.28, green: 0.36, blue: 0.8, alpha: 1)
16   var routeAlternateColor: UIColor = #colorLiteral(red: 1, green: 0.65, blue: 0, alpha: 1)
17   var routeAlternateCasingColor: UIColor = #colorLiteral(red: 1.0, green: 0.9, blue: 0.4, alpha: 1)
18   var traversedRouteColor: UIColor = #colorLiteral(red: 0.1843137255, green: 0.4784313725, blue: 0.7764705882, alpha: 1)
19  
20   var navigationMapView: NavigationMapView!
21  
22   var currentRouteIndex = 0 {
23       didSet {
24           showCurrentRoute()
25       }
26   }
27  
28   var currentRoute: Route? {
29       return routes?[currentRouteIndex]
30   }
31  
32   var routes: [Route]? {
33       didSet {
34          
35           guard let routes = routes,
36                 let current = routes.first
37           else {
38               navigationMapView?.removeRoutes()
39               navigationMapView?.removeRouteDurationSymbol()
40               if let annotation = navigationMapView?.annotations?.last {
41                   navigationMapView?.removeAnnotation(annotation)
42               }
43               return
44              
45           }
46          
47           navigationMapView?.showRoutes(routes)
48           navigationMapView?.showWaypoints(current)
49           navigationMapView?.showRouteDurationSymbol(routes)
50       }
51   }
52  
53   func showCurrentRoute() {
54       guard let currentRoute = currentRoute else { return }
55      
56       var routes = [currentRoute]
57       routes.append(contentsOf: self.routes!.filter {
58           $0 != currentRoute
59       })
60       navigationMapView.showRoutes(routes)
61       navigationMapView.showWaypoints(currentRoute)
62   }
63  
64   // MARK: - UIViewController lifecycle methods
65   override func viewDidLoad() {
66       super.viewDidLoad()
67      
68       setupNavigationMapView()
69       setupPerformActionBarButtonItem()
70       setupGestureRecognizers()
71   }
72  
73   // MARK: - Setting-up methods
74   func setupNavigationMapView() {
75       navigationMapView = NavigationMapView(frame: view.bounds)
76       navigationMapView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
77       navigationMapView.navigationMapDelegate = self
78       navigationMapView.userTrackingMode = .follow
79      
80       view.addSubview(navigationMapView)
81   }
82  
83   func setupPerformActionBarButtonItem() {
84       let settingsBarButtonItem = UIBarButtonItem(title: NSString(string: "\u{2699}\u{0000FE0E}") as String,
85                                                   style: .plain,
86                                                   target: self,
87                                                   action: #selector(performAction))
88       settingsBarButtonItem.setTitleTextAttributes([.font: UIFont.systemFont(ofSize: 30)], for: .normal)
89       settingsBarButtonItem.setTitleTextAttributes([.font: UIFont.systemFont(ofSize: 30)], for: .highlighted)
90       navigationItem.rightBarButtonItem = settingsBarButtonItem
91   }
92  
93   @objc func performAction(_ sender: Any) {
94       let alertController = UIAlertController(title: "Perform action",
95                                               message: "Select specific action to perform it", preferredStyle: .actionSheet)
96      
97       let startNavigation: ActionHandler = { _ in self.startNavigation() }
98       let removeRoutes: ActionHandler = { _ in self.routes = nil }
99      
100       let actions: [(String, UIAlertAction.Style, ActionHandler?)] = [
101           ("Start Navigation", .default, startNavigation),
102           ("Remove Routes", .default, removeRoutes),
103           ("Cancel", .cancel, nil)
104       ]
105      
106       actions
107           .map({ payload in UIAlertAction(title: payload.0, style: payload.1, handler: payload.2) })
108           .forEach(alertController.addAction(_:))
109      
110       if let popoverController = alertController.popoverPresentationController {
111           popoverController.barButtonItem = navigationItem.rightBarButtonItem
112       }
113      
114       present(alertController, animated: true, completion: nil)
115   }
116  
117   func setupGestureRecognizers() {
118       let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(_:)))
119       navigationMapView.addGestureRecognizer(longPressGestureRecognizer)
120   }
121  
122   @objc func startNavigation() {
123       guard let routes = routes else {
124           print("Please select at least one destination coordinate to start navigation.")
125           return
126       }
127      
128       let navigationService = NBNavigationService(routes: routes, routeIndex: currentRouteIndex)
129      
130       let navigationOptions = NavigationOptions(navigationService: navigationService)
131       let navigationViewController = NavigationViewController(for: routes,navigationOptions: navigationOptions)
132       navigationViewController.delegate = self
133       navigationViewController.modalPresentationStyle = .fullScreen
134       navigationViewController.routeLineTracksTraversal = true
135       present(navigationViewController, animated: true, completion: nil)
136   }
137  
138   @objc func handleLongPress(_ gesture: UILongPressGestureRecognizer) {
139       guard let navigationMapView = navigationMapView, gesture.state == .began else {
140           return
141       }
142       let coordinates = navigationMapView.convert(gesture.location(in: navigationMapView), toCoordinateFrom: navigationMapView)
143       let destination = Waypoint(coordinate: coordinates, name: "\(coordinates.latitude),\(coordinates.longitude)")
144      
145       addNewDestinationcon(coordinates: coordinates)
146      
147       guard let currentLocation =  navigationMapView.userLocation?.coordinate else { return}
148       let currentWayPoint = Waypoint.init(coordinate: currentLocation, name: "My Location")
149      
150       requestRoutes(origin: currentWayPoint, destination: destination)
151   }
152  
153   func addNewDestinationcon(coordinates: CLLocationCoordinate2D){
154       guard let mapView = navigationMapView else {
155           return
156       }
157      
158       if let annotation = mapView.annotations?.last {
159           mapView.removeAnnotation(annotation)
160       }
161      
162       let annotation = NGLPointAnnotation()
163       annotation.coordinate = coordinates
164       mapView.addAnnotation(annotation)
165   }
166  
167   func requestRoutes(origin: Waypoint, destination: Waypoint){
168      
169       let options = NavigationRouteOptions(origin: origin, destination: destination)
170      
171       Directions.shared.calculate(options) { [weak self] routes, error in
172           guard let weakSelf = self else {
173               return
174           }
175           guard error == nil else {
176               print(error!)
177               return
178           }
179          
180           guard let routes = routes else { return }
181          
182           weakSelf.routes = routes
183       }
184   }
185  
186   func routeStyleLayer(identifier: String,source: NGLSource) -> NGLStyleLayer {
187       let line = NGLLineStyleLayer(identifier: identifier, source: source)
188       line.lineWidth = NSExpression(format: "ngl_interpolate:withCurveType:parameters:stops:($zoomLevel, 'linear', nil, %@)", NBRouteLineWidthByZoomLevel)
189       line.lineColor = NSExpression(format: "TERNARY(isAlternateRoute == true, %@, NGL_MATCH(congestion, 'low' , %@, 'moderate', %@, 'heavy', %@, 'severe', %@, %@))", routeAlternateColor, trafficLowColor, trafficModerateColor, trafficHeavyColor, trafficSevereColor, trafficUnknownColor)
190       line.lineOpacity = NSExpression(forConstantValue: 1)
191       line.lineCap = NSExpression(forConstantValue: "round")
192       line.lineJoin = NSExpression(forConstantValue: "round")
193      
194       return line
195   }
196  
197   func routeCasingStyleLayer(identifier: String,source: NGLSource) -> NGLStyleLayer {
198       let lineCasing = NGLLineStyleLayer(identifier: identifier, source: source)
199      
200       // Take the default line width and make it wider for the casing
201       lineCasing.lineWidth = NSExpression(format: "ngl_interpolate:withCurveType:parameters:stops:($zoomLevel, 'linear', nil, %@)", NBRouteLineWidthByZoomLevel.multiplied(by: 1.3))
202      
203       lineCasing.lineColor = NSExpression(forConstantValue: routeCasingColor)
204      
205       lineCasing.lineCap = NSExpression(forConstantValue: "round")
206       lineCasing.lineJoin = NSExpression(forConstantValue: "round")
207      
208       lineCasing.lineOpacity = NSExpression(forConditional: NSPredicate(format: "isAlternateRoute == true"),
209                                             trueExpression: NSExpression(forConstantValue: 1),
210                                             falseExpression: NSExpression(forConditional: NSPredicate(format: "isCurrentLeg == true"), trueExpression: NSExpression(forConstantValue: 1), falseExpression: NSExpression(forConstantValue: 0.85)))
211      
212       return lineCasing
213   }
214}
215
216// MARK: - NavigationMapViewDelegate methods
217extension RouteLinesStylingViewController: NavigationMapViewDelegate {
218  
219   func navigationMapView(_ mapView: NavigationMapView, routeStyleLayerWithIdentifier identifier: String, source: NGLSource) -> NGLStyleLayer? {
220      
221       return routeStyleLayer(identifier: identifier,source: source)
222   }
223  
224   func navigationMapView(_ mapView: NavigationMapView, routeCasingStyleLayerWithIdentifier identifier: String, source: NGLSource) -> NGLStyleLayer? {
225       return routeCasingStyleLayer(identifier: identifier,source: source)
226   }
227}
228
229// MARK: - NavigationViewControllerDelegate methods
230extension RouteLinesStylingViewController: NavigationViewControllerDelegate {
231  
232  
233   func navigationViewControllerDidDismiss(_ navigationViewController: NavigationViewController, byCanceling canceled: Bool) {
234       dismiss(animated: true, completion: nil)
235   }
236  
237   func navigationViewController(_ navigationViewController: NavigationViewController, routeStyleLayerWithIdentifier identifier: String, source: NGLSource) -> NGLStyleLayer? {
238       return routeStyleLayer(identifier: identifier,source: source)
239   }
240  
241   func navigationViewController(_ navigationViewController: NavigationViewController, routeCasingStyleLayerWithIdentifier identifier: String, source: NGLSource) -> NGLStyleLayer? {
242       return routeCasingStyleLayer(identifier: identifier,source: source)
243   }
244}