git.r.bdr.sh - rbdr/map/blob - Map/Views/ContentView.swift

   1 //
   2 //  ContentView.swift
   3 //  Map
   4 //
   5 //  Created by Ruben Beltran del Rio on 2/1/21.
   6 //
   7
   8 import CoreData
   9 import SwiftUI
  10
  11 struct ContentView: View {
  12   @Environment(\.managedObjectContext) private var viewContext
  13
  14   @EnvironmentObject var store: AppStore
  15
  16   @FetchRequest(
  17     sortDescriptors: [NSSortDescriptor(keyPath: \Map.createdAt, ascending: true)],
  18     animation: .default)
  19   private var maps: FetchedResults<Map>
  20
  21   var body: some View {
  22     NavigationView {
  23       List {
  24         if maps.count == 0 {
  25           DefaultMapView()
  26         }
  27         ForEach(maps) { map in
  28           NavigationLink(
  29             destination: MapDetailView(map: map, title: map.title ?? "", content: map.content ?? "")
  30           ) {
  31             HStack {
  32               Text(map.title ?? "Untitled Map")
  33               Spacer()
  34               Text(mapFormatter.string(from: (map.createdAt ?? Date())))
  35                 .font(.caption)
  36                 .padding(.vertical, 2.0)
  37                 .padding(.horizontal, 4.0)
  38                 .background(Color.accentColor)
  39                 .foregroundColor(Color.black)
  40                 .cornerRadius(2.0)
  41             }.padding(.leading, 8.0)
  42           }.contextMenu {
  43             Button(
  44               action: { store.send(.deleteMap(map: map)) },
  45               label: {
  46                 Image(systemName: "trash")
  47                 Text("Delete")
  48               })
  49           }
  50         }
  51         .onDelete(perform: deleteMaps)
  52       }.frame(minWidth: 250.0, alignment: .leading)
  53         .toolbar {
  54           HStack {
  55             Button(action: toggleSidebar) {
  56               Label("Toggle Sidebar", systemImage: "sidebar.left")
  57             }
  58             Button(action: addMap) {
  59               Label("Add Map", systemImage: "plus")
  60             }
  61           }
  62         }
  63       DefaultMapView()
  64     }
  65   }
  66
  67   private func toggleSidebar() {
  68     NSApp.keyWindow?.firstResponder?.tryToPerform(
  69       #selector(NSSplitViewController.toggleSidebar(_:)), with: nil)
  70   }
  71
  72   private func addMap() {
  73     withAnimation {
  74       let newMap = Map(context: viewContext)
  75       newMap.uuid = UUID()
  76       newMap.createdAt = Date()
  77       newMap.title = "Map \(newMap.createdAt!.format())"
  78       newMap.content = ""
  79
  80       do {
  81         try viewContext.save()
  82       } catch {
  83         let nsError = error as NSError
  84         fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  85       }
  86     }
  87   }
  88
  89   private func deleteMaps(offsets: IndexSet) {
  90
  91     withAnimation {
  92       offsets.map { maps[$0] }.forEach(viewContext.delete)
  93
  94       do {
  95         try viewContext.save()
  96       } catch {
  97         let nsError = error as NSError
  98         fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  99       }
 100     }
 101   }
 102 }
 103
 104 private let mapFormatter: DateFormatter = {
 105   let formatter = DateFormatter()
 106   formatter.dateStyle = .short
 107   formatter.timeStyle = .none
 108   return formatter
 109 }()
 110
 111 struct ContentView_Previews: PreviewProvider {
 112   static var previews: some View {
 113     ContentView().environment(
 114       \.managedObjectContext, PersistenceController.preview.container.viewContext)
 115   }
 116 }