git.r.bdr.sh - rbdr/map/blob - Map/Presentation/Windows/MapEditorWindow.swift

   1 import CoreData
   2 import SwiftUI
   3
   4 struct MapEditorWindow: View {
   5   @Environment(\.managedObjectContext) private var viewContext
   6
   7   @EnvironmentObject var store: AppStore
   8
   9   @FetchRequest(
  10     sortDescriptors: [NSSortDescriptor(keyPath: \Map.createdAt, ascending: true)],
  11     animation: .default)
  12   private var maps: FetchedResults<Map>
  13
  14   var body: some View {
  15     NavigationView {
  16       List {
  17         if maps.count == 0 {
  18           EmptyMapDetailScreen()
  19         }
  20         ForEach(maps) { map in
  21           NavigationLink(
  22             destination: MapDetailScreen(map: map, title: map.title ?? "", content: map.content ?? "")
  23           ) {
  24             HStack {
  25               Text(map.title ?? "Untitled Map")
  26               Spacer()
  27               Text(mapFormatter.string(from: (map.createdAt ?? Date())))
  28                 .font(.caption)
  29                 .padding(.vertical, 2.0)
  30                 .padding(.horizontal, 4.0)
  31                 .background(Color.accentColor)
  32                 .foregroundColor(Color.black)
  33                 .cornerRadius(2.0)
  34             }.padding(.leading, 8.0)
  35           }.contextMenu {
  36             Button(
  37               action: { store.send(.deleteMap(map: map)) },
  38               label: {
  39                 Image(systemName: "trash")
  40                 Text("Delete")
  41               })
  42           }
  43         }
  44         .onDelete(perform: deleteMaps)
  45       }.frame(minWidth: 250.0, alignment: .leading)
  46         .toolbar {
  47           HStack {
  48             Button(action: toggleSidebar) {
  49               Label("Toggle Sidebar", systemImage: "sidebar.left")
  50             }
  51             Button(action: addMap) {
  52               Label("Add Map", systemImage: "plus")
  53             }
  54           }
  55         }
  56       EmptyMapDetailScreen()
  57     }
  58   }
  59
  60   private func toggleSidebar() {
  61     NSApp.keyWindow?.firstResponder?.tryToPerform(
  62       #selector(NSSplitViewController.toggleSidebar(_:)), with: nil)
  63   }
  64
  65   private func addMap() {
  66     withAnimation {
  67       let newMap = Map(context: viewContext)
  68       newMap.uuid = UUID()
  69       newMap.createdAt = Date()
  70       newMap.title = "Map \(newMap.createdAt!.format())"
  71       newMap.content = ""
  72
  73       do {
  74         try viewContext.save()
  75       } catch {
  76         let nsError = error as NSError
  77         fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  78       }
  79     }
  80   }
  81
  82   private func deleteMaps(offsets: IndexSet) {
  83
  84     withAnimation {
  85       offsets.map { maps[$0] }.forEach(viewContext.delete)
  86
  87       do {
  88         try viewContext.save()
  89       } catch {
  90         let nsError = error as NSError
  91         fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  92       }
  93     }
  94   }
  95 }
  96
  97 private let mapFormatter: DateFormatter = {
  98   let formatter = DateFormatter()
  99   formatter.dateStyle = .short
 100   formatter.timeStyle = .none
 101   return formatter
 102 }()
 103
 104 struct ContentView_Previews: PreviewProvider {
 105   static var previews: some View {
 106     MapEditorWindow().environment(
 107       \.managedObjectContext, PersistenceController.preview.container.viewContext)
 108   }
 109 }