vector-im/element-ios/issues/5298 - Implemented location sharing from the input toolbar action menu.

RiotSwiftUI/Modules/Room/LocationSharing/View/LocationSharingMapView.swift

@@ -0,0 +1,128 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import SwiftUI
+import Combine
+import Mapbox
+
+@available(iOS 14, *)
+struct LocationSharingMapView: UIViewRepresentable {
+    private struct Constants {
+        static let mapZoomLevel = 15.0
+        static let mapStyleURLString = "https://api.maptiler.com/maps/streets/style.json?key="
+    }
+    
+    let accessToken: String
+    let avatarData: AvatarInputProtocol
+    let errorSubject: PassthroughSubject<LocationSharingViewError, Never>
+    @Binding var userLocation: CLLocationCoordinate2D?
+        
+    func makeUIView(context: Context) -> some UIView {
+        let url = URL(string: Constants.mapStyleURLString + accessToken)
+        
+        let mapView = MGLMapView(frame: .zero, styleURL: url)
+        mapView.delegate = context.coordinator
+        
+        mapView.logoView.isHidden = true
+        mapView.attributionButton.isHidden = true
+        mapView.showsUserLocation = true
+        mapView.userTrackingMode = .follow
+        
+        return mapView
+    }
+    
+    func updateUIView(_ uiView: UIViewType, context: Context) {
+        
+    }
+    
+    func makeCoordinator() -> LocationSharingMapViewCoordinator {
+        LocationSharingMapViewCoordinator(avatarData: avatarData,
+                                          errorSubject: errorSubject,
+                                          userLocation: $userLocation)
+    }
+}
+
+@available(iOS 14, *)
+class LocationSharingMapViewCoordinator: NSObject, MGLMapViewDelegate {
+    
+    private let avatarData: AvatarInputProtocol
+    private let errorSubject: PassthroughSubject<LocationSharingViewError, Never>
+    @Binding var userLocation: CLLocationCoordinate2D?
+    
+    init(avatarData: AvatarInputProtocol,
+         errorSubject: PassthroughSubject<LocationSharingViewError, Never>,
+         userLocation: Binding<CLLocationCoordinate2D?>) {
+        self.avatarData = avatarData
+        self.errorSubject = errorSubject
+        self._userLocation = userLocation
+    }
+    
+    // MARK: - MGLMapViewDelegate
+    
+    func mapView(_ mapView: MGLMapView, viewFor annotation: MGLAnnotation) -> MGLAnnotationView? {
+        guard let _ = annotation as? MGLUserLocation else {
+            return nil
+        }
+        
+        return UserLocationAnnotatonView(avatarData: avatarData)
+    }
+    
+    func mapViewDidFailLoadingMap(_ mapView: MGLMapView, withError error: Error) {
+        errorSubject.send(.failedLoadingMap)
+    }
+    
+    func mapView(_ mapView: MGLMapView, didFailToLocateUserWithError error: Error) {
+        errorSubject.send(.failedLocatingUser)
+    }
+    
+    func mapView(_ mapView: MGLMapView, didUpdate userLocation: MGLUserLocation?) {
+        self.userLocation = userLocation?.coordinate
+    }
+    
+    func mapView(_ mapView: MGLMapView, didChangeLocationManagerAuthorization manager: MGLLocationManager) {
+        switch manager.authorizationStatus {
+        case .restricted:
+            fallthrough
+        case .denied:
+            errorSubject.send(.failedLocatingUser)
+        default:
+            break
+        }
+    }
+}
+
+@available(iOS 14, *)
+private class UserLocationAnnotatonView: MGLUserLocationAnnotationView {
+    
+    init(avatarData: AvatarInputProtocol) {
+        super.init(frame: .zero)
+        
+        guard let avatarImageView = UIHostingController(rootView: LocationSharingUserMarkerView(avatarData: avatarData)).view else {
+            return
+        }
+        
+        addSubview(avatarImageView)
+        
+        addConstraints([topAnchor.constraint(equalTo: avatarImageView.topAnchor),
+                        leadingAnchor.constraint(equalTo: avatarImageView.leadingAnchor),
+                        bottomAnchor.constraint(equalTo: avatarImageView.bottomAnchor),
+                        trailingAnchor.constraint(equalTo: avatarImageView.trailingAnchor)])
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError()
+    }
+}

RiotSwiftUI/Modules/Room/LocationSharing/View/LocationSharingUserMarkerView.swift

@@ -0,0 +1,53 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import SwiftUI
+
+@available(iOS 14.0, *)
+struct LocationSharingUserMarkerView: View {
+    
+    // MARK: - Properties
+    
+    // MARK: Private
+    
+    @Environment(\.theme) private var theme: ThemeSwiftUI
+    
+    // MARK: Public
+    
+    let avatarData: AvatarInputProtocol
+    
+    var body: some View {
+        ZStack(alignment: .center) {
+            Image(uiImage: Asset.Images.locationUserMarker.image)
+            AvatarImage(avatarData: avatarData, size: .large)
+                .offset(.init(width: 0.0, height: -1.5))
+        }
+        .accentColor(theme.colors.accent)
+    }
+}
+
+// MARK: - Previews
+
+@available(iOS 14.0, *)
+struct LocationSharingUserMarkerView_Previews: PreviewProvider {
+    static var previews: some View {
+        let avatarData = AvatarInput(mxContentUri: "",
+                                     matrixItemId: "",
+                                     displayName: "Alice")
+        
+        LocationSharingUserMarkerView(avatarData: avatarData)
+    }
+}

RiotSwiftUI/Modules/Room/LocationSharing/View/LocationSharingView.swift

@@ -0,0 +1,86 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import SwiftUI
+import CoreLocation
+
+@available(iOS 14.0, *)
+struct LocationSharingView: View {
+    
+    // MARK: - Properties
+    
+    // MARK: Private
+    
+    @Environment(\.theme) private var theme: ThemeSwiftUI
+    
+    // MARK: Public
+    
+    @ObservedObject var context: LocationSharingViewModel.Context
+    
+    var body: some View {
+        NavigationView {
+            LocationSharingMapView(accessToken: context.viewState.accessToken,
+                                   avatarData: context.viewState.avatarData,
+                                   errorSubject: context.viewState.errorSubject,
+                                   userLocation: $context.userLocation)
+                .toolbar {
+                    ToolbarItem(placement: .navigationBarLeading) {
+                        Button(VectorL10n.cancel, action: {
+                            context.send(viewAction: .cancel)
+                        })
+                    }
+                    ToolbarItem(placement: .principal) {
+                        Text(VectorL10n.locationSharingTitle)
+                            .font(.headline)
+                            .foregroundColor(theme.colors.primaryContent)
+                    }
+                    ToolbarItem(placement: .navigationBarTrailing) {
+                        Button(VectorL10n.locationSharingShareAction, action: {
+                            context.send(viewAction: .share)
+                        })
+                        .disabled(!context.viewState.shareButtonEnabled)
+                    }
+                }
+                .navigationBarTitleDisplayMode(.inline)
+                .ignoresSafeArea()
+                .alert(item: $context.alertInfo) { info in
+                    Alert(title: Text(info.title), message: Text(info.message), dismissButton:
+                            .default(Text(VectorL10n.pollTimelineVoteNotRegisteredAction)) {
+                                info.callback?()
+                            })
+                }
+        }
+        .accentColor(theme.colors.accent)
+        .activityIndicator(show: context.viewState.showLoadingIndicator)
+    }
+    
+    @ViewBuilder
+    private var activityIndicator: some View {
+        if context.viewState.showLoadingIndicator {
+            ActivityIndicator()
+        }
+    }
+}
+
+// MARK: - Previews
+
+@available(iOS 14.0, *)
+struct LocationSharingView_Previews: PreviewProvider {
+    static let stateRenderer = MockLocationSharingScreenState.stateRenderer
+    static var previews: some View {
+        stateRenderer.screenGroup()
+    }
+}