MapLibre Swift UI View Representation

MainMapLibreViewRepresentation.swift

//
//  MainMapLibreViewRepresentation.swift
//  Topo Lock Maps
//
//  Created by VonCannon Technology, Inc. on 6/20/23.
//

import SwiftUI
import Foundation
import Mapbox

struct MainMapLibreViewRepresentation: UIViewRepresentable {
    typealias UIViewType = MGLMapView
    @EnvironmentObject var mapStore: MapStore
    @Environment(\.managedObjectContext) private var viewContext
    
    func makeUIView(context: Context) -> MGLMapView {
        
#if DEBUG
        MGLLoggingConfiguration.shared.loggingLevel = .verbose
#else
        MGLLoggingConfiguration.shared.loggingLevel = .warning
#endif
        
        MGLNetworkConfiguration.sharedManager.delegate = NetworkManager.shared
        
        let styleUrl = BaseMapMO.lastUsedBaseMap(context: viewContext)?.styleUrl ?? mapStore.selectedBaseMap?.styleUrl ?? BaseMaps.defaultBaseMap.styleUrl
        
        let mapView = MGLMapView(frame: .zero)
        mapView.delegate = context.coordinator
        mapView.styleURL = styleUrl
        mapView.showsScale = true
        
        let lastMapConfig = MapStore.getLastViewedLocationAndZoom()
        mapView.setCenter(CLLocationCoordinate2D(latitude: lastMapConfig.latitude, longitude: lastMapConfig.longitude), zoomLevel: lastMapConfig.zoom, animated: false)
        mapView.attributionButtonPosition = .bottomLeft
        mapView.logoView.isHidden = true //We aren't using mapbox tiles so hide this
        mapView.compassViewMargins = CGPoint(x: 15, y: 10) //To align the compass with the map buttons
        mapView.scaleBarShouldShowDarkStyles = context.environment.colorScheme == .dark
        mapView.anchorRotateOrZoomGesturesToCenterCoordinate = mapStore.lockMapPanningOnZoom
        
        switch mapStore.locationStatus {
        case .NoAccess:
            break
        case .Access:
            mapView.showsUserLocation = true
            mapView.showsUserHeadingIndicator = true
        case .Unknown:
            mapView.showsUserLocation = false
            mapView.showsUserHeadingIndicator = false
        }
        
        let longPressGestureRecognizer = UILongPressGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleLongPress(_:)))
        longPressGestureRecognizer.delegate = context.coordinator
        mapView.addGestureRecognizer(longPressGestureRecognizer)
        
        let twoFingerGestureRecognizer = UILongPressGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleTwoFinderLongPress(_:)))
        twoFingerGestureRecognizer.numberOfTouchesRequired = 2
        mapView.addGestureRecognizer(twoFingerGestureRecognizer)
        
        return mapView
    }
    
    func updateUIView(_ mapView: MGLMapView, context: Context) {
        mapView.scaleBarShouldShowDarkStyles = context.environment.colorScheme == .dark
    }
    
    func makeCoordinator() -> MapLibreCoordinator {
        return MapLibreCoordinator(mapStore: mapStore)
    }
    
    static func dismantleUIView(_ uiView: MGLMapView, coordinator: MapLibreCoordinator) {
        //Always ensure the coordinate is deallocated!
        TLLog.log(type: .App, statement: "dismantleUIView - MGLMapView - Coordinator")
    }
}

#if DEBUG
#Preview {
    MainMapLibreViewRepresentation()
        .environmentObject(MapStore.shared)
}
#endif