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//
// ContentView.swift
// Map
//
// Created by Ruben Beltran del Rio on 2/1/21.
//
import SwiftUI
import CoreData
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 {
ForEach(maps) { map in
NavigationLink(destination: MapDetailView(map: map)) {
HStack {
Text(map.title ?? "Untitled Map")
Text(map.createdAt!.format())
.font(.footnote)
.foregroundColor(Color.accentColor)
}
}
}
.onDelete(perform: deleteMaps)
}
.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 {
// Replace this implementation with code to handle the error appropriately.
// 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.
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 {
// Replace this implementation with code to handle the error appropriately.
// 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.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
}
private let mapFormatter: DateFormatter = {
let formatter = DateFormatter()
formatter.dateStyle = .short
formatter.timeStyle = .medium
return formatter
}()
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
}
}
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