element-x-ios/ElementX/Sources/Screens/RoomScreen/View/Supplementary/TimelineDeliveryStatusView.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 TimelineDeliveryStatusView: View {
    let deliveryStatus: TimelineItemDeliveryStatus
    
    @State var showDeliveryStatus: Bool
    
    private var systemImageName: String {
        switch deliveryStatus {
        case .sending:
            return "circle"
        case .sent:
            return "checkmark.circle"
        case .sendingFailed:
            return "exclamationmark.circle"
        }
    }
    
    init(deliveryStatus: TimelineItemDeliveryStatus) {
        self.deliveryStatus = deliveryStatus
        
        switch deliveryStatus {
        case .sending, .sendingFailed:
            showDeliveryStatus = true
        case let .sent(elapsedTime: elapsedTime):
            showDeliveryStatus = elapsedTime < 3
        }
    }
    
    var body: some View {
        Image(systemName: systemImageName)
            .resizable()
            .frame(width: 12.0, height: 12.0)
            .opacity(showDeliveryStatus ? 1.0 : 0.0)
            .task {
                if case .sent = deliveryStatus {
                    try? await Task.sleep(nanoseconds: 1_000_000_000)
                    withAnimation {
                        showDeliveryStatus = false
                    }
                }
            }
    }
}

struct TimelineDeliveryStatusView_Previews: PreviewProvider {
    static var previews: some View {
        VStack {
            TimelineDeliveryStatusView(deliveryStatus: .sending)
            TimelineDeliveryStatusView(deliveryStatus: .sent(elapsedTime: Date().timeIntervalSince1970))
        }
    }
}