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comparison Simoleon/Helpers/FavoriteButton.swift @ 187:13d5a8deb6c2

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add AboutView and FavoritesView
author Dennis Concepcion Martin <dennisconcepcionmartin@gmail.com>
date Thu, 23 Dec 2021 16:12:22 +0100
parents 2fc95efcb1ee
children
comparison
equal deleted inserted replaced
186:1ebd1c5dd302 187:13d5a8deb6c2
4 // 4 //
5 // Created by Dennis Concepción Martín on 21/12/21. 5 // Created by Dennis Concepción Martín on 21/12/21.
6 // 6 //
7 7
8 import SwiftUI 8 import SwiftUI
9 import CoreData
9 10
10 struct FavoriteButton: View { 11 struct FavoriteButton: View {
12 @Binding var baseCurrency: SupportedCurrencyResult
13 @Binding var quoteCurrency: SupportedCurrencyResult
11 @State private var scale: CGFloat = 1 14 @State private var scale: CGFloat = 1
15 @Environment(\.managedObjectContext) private var viewContext
16 @FetchRequest(sortDescriptors: []) private var favoritePairs: FetchedResults<FavoritePair>
12 17
13 var body: some View { 18 var body: some View {
14 Button(action: {}) { 19 Button(action: {
20 animate()
21 if isFavorite() { remove() }
22 else { add() }
23 }) {
15 RoundedRectangle(cornerRadius: 15) 24 RoundedRectangle(cornerRadius: 15)
16 .foregroundColor(Color(.secondarySystemBackground)) 25 .foregroundColor(Color(.secondarySystemBackground))
17 .frame(width: 60, height: 60) 26 .frame(width: 60, height: 60)
18 .overlay( 27 .overlay(
19 VStack { 28 VStack {
31 .animation(.linear(duration: 0.2), value: scale) 40 .animation(.linear(duration: 0.2), value: scale)
32 } 41 }
33 42
34 // Add currency conversion to favorites 43 // Add currency conversion to favorites
35 private func add() { 44 private func add() {
45 let favoritePair = FavoritePair(context: viewContext)
46 favoritePair.baseCurrency = baseCurrency.code
47 favoritePair.quoteCurrency = quoteCurrency.code
36 48
49 do {
50 try viewContext.save()
51 } catch {
52 // Replace this implementation with code to handle the error appropriately.
53 // 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.
54 let nsError = error as NSError
55 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
56 }
37 } 57 }
38 58
39 // Remove currency conversion from favorites 59 // Remove currency conversion from favorites
40 private func remove() { 60 private func remove() {
61 let favoritePair = favoritePairs.first(
62 where: {
63 $0.baseCurrency == baseCurrency.code && $0.quoteCurrency == quoteCurrency.code
64 })
41 65
66 viewContext.delete(favoritePair!)
67
68 do {
69 try viewContext.save()
70 } catch {
71 // Replace this implementation with code to handle the error appropriately.
72 // 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.
73 let nsError = error as NSError
74 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
75 }
42 } 76 }
43 77
44 // Check if currency conversion is in favorites 78 // Check if currency conversion is in favorites
45 private func isFavorite() -> Bool { 79 private func isFavorite() -> Bool {
46 return false 80 let favoritePair = favoritePairs.first(
81 where: {
82 $0.baseCurrency == baseCurrency.code && $0.quoteCurrency == quoteCurrency.code
83 })
84
85 guard let _ = favoritePair else { return false }
86
87 return true
47 } 88 }
48 89
49 // Animate favorite button 90 // Animate favorite button
50 private func animate() { 91 private func animate() {
51 scale += 0.2 92 scale += 0.2
55 } 96 }
56 } 97 }
57 98
58 struct FavoriteButton_Previews: PreviewProvider { 99 struct FavoriteButton_Previews: PreviewProvider {
59 static var previews: some View { 100 static var previews: some View {
60 FavoriteButton() 101 FavoriteButton(
102 baseCurrency: .constant(SupportedCurrencyResult(code: "EUR", name: "Euro", isCrypto: 0)),
103 quoteCurrency: .constant(SupportedCurrencyResult(code: "USD", name: "U.S. Dollar", isCrypto: 0))
104 )
105 .environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
61 } 106 }
62 } 107 }