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

   1 //
   2 //  ContentView.swift
   3 //  Map
   4 //
   5 //  Created by Ruben Beltran del Rio on 2/1/21.
   6 //
   7
   8 import SwiftUI
   9 import CoreData
  10
  11 struct ContentView: View {
  12     @Environment(\.managedObjectContext) private var viewContext
  13
  14     @FetchRequest(
  15         sortDescriptors: [NSSortDescriptor(keyPath: \Map.createdAt, ascending: true)],
  16         animation: .default)
  17     private var maps: FetchedResults<Map>
  18
  19     var body: some View {
  20         NavigationView {
  21         List {
  22             ForEach(maps) { map in
  23                 NavigationLink(destination: MapDetailView(map: map)) {
  24                 HStack {
  25                     Text(map.title ?? "Untitled Map")
  26                     Text(map.createdAt!.format())
  27                         .font(.footnote)
  28                         .foregroundColor(Color.accentColor)
  29                 }
  30                 }
  31             }
  32             .onDelete(perform: deleteMaps)
  33         }
  34         .toolbar {
  35             HStack {
  36                 Button(action: toggleSidebar) {
  37                     Label("Toggle Sidebar", systemImage: "sidebar.left")
  38                 }
  39                 Button(action: addMap) {
  40                     Label("Add Map", systemImage: "plus")
  41                 }
  42             }
  43         }
  44         }
  45     }
  46
  47     private func toggleSidebar() {
  48             NSApp.keyWindow?.firstResponder?.tryToPerform(#selector(NSSplitViewController.toggleSidebar(_:)), with: nil)
  49     }
  50
  51     private func addMap() {
  52         withAnimation {
  53             let newMap = Map(context: viewContext)
  54             newMap.uuid = UUID()
  55             newMap.createdAt = Date()
  56             newMap.title = "Map \(newMap.createdAt!.format())"
  57             newMap.content = ""
  58
  59             do {
  60                 try viewContext.save()
  61             } catch {
  62                 // Replace this implementation with code to handle the error appropriately.
  63                 // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
  64                 let nsError = error as NSError
  65                 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  66             }
  67         }
  68     }
  69
  70     private func deleteMaps(offsets: IndexSet) {
  71         withAnimation {
  72             offsets.map { maps[$0] }.forEach(viewContext.delete)
  73
  74             do {
  75                 try viewContext.save()
  76             } catch {
  77                 // Replace this implementation with code to handle the error appropriately.
  78                 // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
  79                 let nsError = error as NSError
  80                 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
  81             }
  82         }
  83     }
  84 }
  85
  86 private let mapFormatter: DateFormatter = {
  87     let formatter = DateFormatter()
  88     formatter.dateStyle = .short
  89     formatter.timeStyle = .medium
  90     return formatter
  91 }()
  92
  93 struct ContentView_Previews: PreviewProvider {
  94     static var previews: some View {
  95         ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
  96     }
  97 }