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(destination: MapDetailView(map: map)) {
  29             HStack {
  30               Text(map.title ?? "Untitled Map")
  31               Spacer()
  32               Text(mapFormatter.string(from: (map.createdAt ?? Date())))
  33                 .font(.caption)
  34                 .padding(.vertical, 2.0)
  35                 .padding(.horizontal, 4.0)
  36                 .background(Color.accentColor)
  37                 .foregroundColor(Color.black)
  38                 .cornerRadius(2.0)
  39             }.padding(.leading, 8.0)
  40           }
  41         }
  42         .onDelete(perform: deleteMaps)
  43       }.frame(minWidth: 250.0, alignment: .leading)
  44         .toolbar {
  45           HStack {
  46             Button(action: toggleSidebar) {
  47               Label("Toggle Sidebar", systemImage: "sidebar.left")
  48             }
  49             Button(action: addMap) {
  50               Label("Add Map", systemImage: "plus")
  51             }
  52           }
  53         }
  54     }
  55   }
  56
  57   private func toggleSidebar() {
  58     NSApp.keyWindow?.firstResponder?.tryToPerform(
  59       #selector(NSSplitViewController.toggleSidebar(_:)), with: nil)
  60   }
  61
  62   private func addMap() {
  63     withAnimation {
  64       let newMap = Map(context: viewContext)
  65       newMap.uuid = UUID()
  66       newMap.createdAt = Date()
  67       newMap.title = "Map \(newMap.createdAt!.format())"
  68       newMap.content = ""
  69
  70       do {
  71         try viewContext.save()
  72       } catch {
  73         let nsError = error as NSError
  74         fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  75       }
  76     }
  77   }
  78
  79   private func deleteMaps(offsets: IndexSet) {
  80
  81     withAnimation {
  82       offsets.map { maps[$0] }.forEach(viewContext.delete)
  83
  84       do {
  85         try viewContext.save()
  86       } catch {
  87         let nsError = error as NSError
  88         fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  89       }
  90     }
  91   }
  92 }
  93
  94 private let mapFormatter: DateFormatter = {
  95   let formatter = DateFormatter()
  96   formatter.dateStyle = .short
  97   formatter.timeStyle = .none
  98   return formatter
  99 }()
 100
 101 struct ContentView_Previews: PreviewProvider {
 102   static var previews: some View {
 103     ContentView().environment(
 104       \.managedObjectContext, PersistenceController.preview.container.viewContext)
 105   }
 106 }