letro-ios/ElementX/Sources/Other/UserIndicator/UserIndicatorPresenter.swift

//
// Copyright 2022 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

struct UserIndicatorPresenter: View {
    @ObservedObject var userIndicatorController: UserIndicatorController
    let rootView: AnyView
    
    var body: some View {
        ZStack(alignment: .top) {
            rootView
            indicatorViewFor(indicator: userIndicatorController.activeIndicator)
        }
        .animation(.elementDefault, value: userIndicatorController.activeIndicator)
    }
    
    @ViewBuilder
    private func indicatorViewFor(indicator: UserIndicator?) -> some View {
        ZStack { // Need a container to properly animate transitions
            if let indicator {
                switch indicator.type {
                case .toast:
                    UserIndicatorToastView(indicator: indicator)
                case .modal:
                    UserIndicatorModalView(indicator: indicator)
                }
            }
        }
        .alert(item: $userIndicatorController.alertInfo)
    }
}