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//
// ContentView.swift
// Map
//
// Created by Ruben Beltran del Rio on 2/1/21.
//
import CoreData
import SwiftUI
struct ContentView: View {
@Environment(\.managedObjectContext) private var viewContext
@FetchRequest(
sortDescriptors: [NSSortDescriptor(keyPath: \Map.createdAt, ascending: true)],
animation: .default)
private var maps: FetchedResults<Map>
var body: some View {
NavigationView {
List {
if maps.count == 0 {
DefaultMapView()
}
ForEach(maps) { map in
NavigationLink(destination: MapDetailView(map: map)) {
HStack {
Text(map.title ?? "Untitled Map")
Spacer()
Text(mapFormatter.string(from: (map.createdAt ?? Date())))
.font(.caption)
.padding(.vertical, 2.0)
.padding(.horizontal, 4.0)
.background(Color.accentColor)
.foregroundColor(Color.black)
.cornerRadius(2.0)
}.padding(.leading, 8.0)
}
}
.onDelete(perform: deleteMaps)
}.frame(minWidth: 250.0, alignment: .leading)
.toolbar {
HStack {
Button(action: toggleSidebar) {
Label("Toggle Sidebar", systemImage: "sidebar.left")
}
Button(action: addMap) {
Label("Add Map", systemImage: "plus")
}
}
}
}
}
private func toggleSidebar() {
NSApp.keyWindow?.firstResponder?.tryToPerform(
#selector(NSSplitViewController.toggleSidebar(_:)), with: nil)
}
private func addMap() {
withAnimation {
let newMap = Map(context: viewContext)
newMap.uuid = UUID()
newMap.createdAt = Date()
newMap.title = "Map \(newMap.createdAt!.format())"
newMap.content = ""
do {
try viewContext.save()
} catch {
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
private func deleteMaps(offsets: IndexSet) {
withAnimation {
offsets.map { maps[$0] }.forEach(viewContext.delete)
do {
try viewContext.save()
} catch {
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
}
private let mapFormatter: DateFormatter = {
let formatter = DateFormatter()
formatter.dateStyle = .short
formatter.timeStyle = .none
return formatter
}()
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView().environment(
\.managedObjectContext, PersistenceController.preview.container.viewContext)
}
}
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