Show popup

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// Copyright 2023 Esri
//
// 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
//
//   https://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 ArcGIS
import ArcGISToolkit

struct ShowPopupView: View {
    /// A map of reported incidents in San Francisco.
    @State private var map = Map(
        item: PortalItem(
            portal: .arcGISOnline(connection: .anonymous),
            id: .incidentsInSanFrancisco
        )
    )

    /// The screen point to perform an identify operation.
    @State private var identifyScreenPoint: CGPoint?

    /// The popup to be shown as the result of the layer identify operation.
    @State private var popup: Popup?

    /// A Boolean value specifying whether the popup view should be shown or not.
    @State private var showPopup = false

    var body: some View {
        MapViewReader { proxy in
            MapView(map: map)
                .onSingleTapGesture { screenPoint, _ in
                    identifyScreenPoint = screenPoint
                }
                .task(id: identifyScreenPoint) {
                    guard let identifyScreenPoint = identifyScreenPoint,
                          let identifyResult = try? await proxy.identifyLayers(
                            screenPoint: identifyScreenPoint,
                            tolerance: 12,
                            returnPopupsOnly: false
                          )
                    else { return }
                    self.popup = identifyResult.first?.popups.first
                    self.showPopup = self.popup != nil
                }
                .floatingPanel(
                    selectedDetent: .constant(.full),
                    horizontalAlignment: .leading,
                    isPresented: $showPopup
                ) { [popup] in
                    PopupView(popup: popup!, isPresented: $showPopup)
                        .showCloseButton(true)
                        .padding()
                }
        }
    }
}

private extension PortalItem.ID {
    /// The ID used in the "Incidents in San Francisco" portal item.
    static var incidentsInSanFrancisco: Self { Self("fb788308ea2e4d8682b9c05ef641f273")! }
}

#Preview {
    ShowPopupView()
}