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1//
2// ContentView.swift
3// Map
4//
5// Created by Ruben Beltran del Rio on 2/1/21.
6//
7
8import SwiftUI
9import CoreData
10
11struct 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
86private let mapFormatter: DateFormatter = {
87 let formatter = DateFormatter()
88 formatter.dateStyle = .short
89 formatter.timeStyle = .medium
90 return formatter
91}()
92
93struct ContentView_Previews: PreviewProvider {
94 static var previews: some View {
95 ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
96 }
97}