LeCountdown/LaunchWidget/LaunchWidgetLiveActivity.swift

//
//  LaunchWidgetLiveActivity.swift
//  LaunchWidget
//
//  Created by Laurent Morvillier on 25/01/2023.
//

import ActivityKit
import WidgetKit
import SwiftUI

struct LaunchWidgetAttributes: ActivityAttributes {
    public struct ContentState: Codable, Hashable {
        // Dynamic stateful properties about your activity go here!
        var ended: Bool
    }

    // Fixed non-changing properties about your activity go here!
    var id: String
    var name: String
    var endDate: Date
    
}

struct LiveActivityView: View {
    
    var name: String
    var endDate: Date
    
    var body: some View {
        HStack {
            Text(name)
            Spacer()
            Text(endDate, style: .timer)
                .monospaced()
        }.padding()
            .font(.title)

    }
    
}

struct LaunchWidgetLiveActivity: Widget {
    var body: some WidgetConfiguration {
        ActivityConfiguration(for: LaunchWidgetAttributes.self) { context in
            
            // Lock screen/banner UI goes here
            HStack {
                Text(context.attributes.name)
                Spacer()
                if !context.state.ended {
                    Text(context.attributes.endDate, style: .timer)
                        .monospaced()
                } else {
                    Text("It's time!")
                }
            }.padding()
            .font(.title)
            .activityBackgroundTint(Color.cyan)
            .activitySystemActionForegroundColor(Color.black)

        } dynamicIsland: { context in
            DynamicIsland {
                // Expanded UI goes here.  Compose the expanded UI through
                // various regions, like leading/trailing/center/bottom
                DynamicIslandExpandedRegion(.leading) {
                    Text(context.attributes.name)
                }
                DynamicIslandExpandedRegion(.trailing) {
                    Text(context.attributes.endDate, style: .timer)
                        .monospaced()
                }
                DynamicIslandExpandedRegion(.bottom) {
                    Button {
                        self._stop()
                    } label: {
                        Text("Stop")
                    }
                }
            } compactLeading: {
                Text("L")
            } compactTrailing: {
                Text("T")
            } minimal: {
                Text("Min")
            }
            .widgetURL(URL(string: context.attributes.id))
            .keylineTint(Color.red)
        }
    }
    
    fileprivate func _stop() {
        
    }
}

struct LaunchWidgetLiveActivity_Previews: PreviewProvider {
    
    static let attributes = LaunchWidgetAttributes(
        id: "",
        name: "Tea",
        endDate: Date().addingTimeInterval(3600.0))
    
    static let contentState = LaunchWidgetAttributes.ContentState(ended: false)

    static var previews: some View {
        attributes
            .previewContext(contentState, viewKind: .dynamicIsland(.compact))
            .previewDisplayName("Island Compact")
        attributes
            .previewContext(contentState, viewKind: .dynamicIsland(.expanded))
            .previewDisplayName("Island Expanded")
        attributes
            .previewContext(contentState, viewKind: .dynamicIsland(.minimal))
            .previewDisplayName("Minimal")
        attributes
            .previewContext(contentState, viewKind: .content)
            .previewDisplayName("Notification")
    }
}