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

RiotSwiftUI/Modules/Room/LocationSharing/LocationSharingModels.swift

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+//
+// 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 Foundation
+import SwiftUI
+import Combine
+import CoreLocation
+
+enum LocationSharingViewError {
+    case failedLoadingMap
+    case failedLocatingUser
+    case invalidLocationAuthorization
+    case failedSharingLocation
+}
+
+enum LocationSharingStateAction {
+    case error(LocationSharingViewError, LocationSharingViewModelCallback?)
+    case startLoading
+    case stopLoading(Error?)
+}
+
+enum LocationSharingViewAction {
+    case cancel
+    case share
+}
+
+typealias LocationSharingViewModelCallback = ((LocationSharingViewModelResult) -> Void)
+
+enum LocationSharingViewModelResult {
+    case cancel
+    case share(Double, Double)
+}
+
+@available(iOS 14, *)
+struct LocationSharingViewState: BindableState {
+    let accessToken: String
+    let avatarData: AvatarInputProtocol
+    var shareButtonEnabled: Bool = true
+    var showLoadingIndicator: Bool = false
+
+    let errorSubject = PassthroughSubject<LocationSharingViewError, Never>()
+    
+    var bindings = LocationSharingViewStateBindings()
+}
+
+struct LocationSharingViewStateBindings {
+    var alertInfo: ErrorAlertInfo?
+    var userLocation: CLLocationCoordinate2D?
+}
+
+struct ErrorAlertInfo: Identifiable {
+    enum AlertType {
+        case mapLoadingError
+        case userLocatingError
+        case authorizationError
+        case locationSharingError
+    }
+    
+    let id: AlertType
+    let title: String
+    let message: String
+    let callback: (() -> Void)?
+}