Implemented the LocationsAddViewController view controller.

Apps/Locations/Sources/Screens/LocationsAdd/LocationsAddViewController.swift

@@ -6,14 +6,30 @@
 //  Copyright © 2023 Röck+Cöde. All rights reserved.
 //
 
+import Combine
 import Core
 import UIKit
+import MapKit
 
 class LocationsAddViewController: BaseViewController {
     
     // MARK: Properties
     
-    var viewModel: LocationsAddViewModeling
+    private let viewModel: LocationsAddViewModeling
+    
+    private var cancellables: Set<AnyCancellable> = []
+    
+    // MARK: Outlets
+    
+    private lazy var map = {
+        let map = MKMapView()
+
+        map.translatesAutoresizingMaskIntoConstraints = false
+        
+        map.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tapOnMap)))
+        
+        return map
+    }()
     
     // MARK: Initialisers
     
@@ -32,7 +48,91 @@ class LocationsAddViewController: BaseViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         
-        title = "Location Add"
+        setupBar()
+        setupView()
+        bindViewModel()
+    }
+    
+}
+
+// MARK: - Helpers
+
+private extension LocationsAddViewController {
+    
+    // MARK: Functions
+    
+    func bindViewModel() {
+        viewModel
+            .locationExistsPublisher
+            .receive(on: RunLoop.main)
+            .sink { locationExists in
+                self.navigationItem
+                    .rightBarButtonItems?
+                    .forEach { $0.isEnabled = locationExists }
+            }
+            .store(in: &cancellables)
+    }
+    
+    func setupBar() {
+        title = "Add a location"
+        navigationController?.navigationBar.prefersLargeTitles = false
+        navigationController?.navigationBar.backgroundColor = .systemBackground
+        navigationController?.navigationBar.isTranslucent = true
+        navigationController?.navigationBar.tintColor = .red
+        navigationItem.rightBarButtonItems = [
+            .init(
+                title: "Save",
+                style: .plain,
+                target: self,
+                action: #selector(saveButtonPressed)
+            ),
+            .init(
+                title: "Clean",
+                style: .plain,
+                target: self,
+                action: #selector(cleanButtonPressed)
+            ),
+        ]
+    }
+    
+    func setupView() {
+        view.addSubview(map)
+                
+        NSLayoutConstraint.activate([
+            view.bottomAnchor.constraint(equalTo: map.bottomAnchor),
+            view.leadingAnchor.constraint(equalTo: map.leadingAnchor),
+            view.topAnchor.constraint(equalTo: map.topAnchor),
+            view.trailingAnchor.constraint(equalTo: map.trailingAnchor),
+        ])
+    }
+
+    // MARK: Actions
+
+    @objc func cleanButtonPressed() {
+        map.removeAnnotations(map.annotations)
+        
+        viewModel.cleanLocation()
+    }
+    
+    @objc func saveButtonPressed() {
+        viewModel.saveLocation()
+    }
+    
+    @objc func tapOnMap(recognizer: UITapGestureRecognizer) {
+        let tapOnView = recognizer.location(in: map)
+        let mapCoordinates = map.convert(tapOnView, toCoordinateFrom: map)
+        let annotation = MKPointAnnotation()
+
+        annotation.coordinate = mapCoordinates
+        
+        map.removeAnnotations(map.annotations)
+        map.addAnnotation(annotation)
+        map.setCenter(mapCoordinates, animated: true)
+        
+        viewModel.setLocation(
+            latitude: Float(mapCoordinates.latitude),
+            longitude: Float(mapCoordinates.longitude)
+        )
     }
     
 }