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annotate Simoleon/Helpers/CurrencySelector.swift @ 50:7a6a7c677851

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Handle errors with alerts
author Dennis Concepción Martín <dennisconcepcionmartin@gmail.com>
date Mon, 26 Jul 2021 21:52:15 +0100
parents 75c1a05176f6
children 1303c1e50843
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1 //
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2 // CurrencySelector.swift
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3 // Simoleon
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4 //
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5 // Created by Dennis Concepción Martín on 18/07/2021.
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6 //
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8 import SwiftUI
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9 import Purchases
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11 struct CurrencySelector: View {
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12 @Binding var currencyPair: String
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13 @Binding var showingCurrencySelector: Bool
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15 @State private var searchCurrency = ""
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16 @State private var showingSubscriptionPaywall = false
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17 @State private var alertTitle = ""
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18 @State private var alertMessage = ""
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19 @State private var showingAlert = false
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21 var body: some View {
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22 NavigationView {
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23 Form {
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24 TextField("Search ...", text: $searchCurrency)
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25 .accessibilityIdentifier("SearchBar")
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27 Section(header: Text("All currencies", comment: "Section header in currency selector")) {
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28 ForEach(currencyPairs(), id: \.self) { currencyPair in
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29 Button(action: { select(currencyPair) }) {
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30 CurrencyRow(currencyPair: currencyPair)
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31 }
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32 }
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33 }
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34 }
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35 .gesture(DragGesture()
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36 .onChanged({ _ in
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37 UIApplication.shared.dismissKeyboard()
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38 })
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39 )
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40 .sheet(isPresented: $showingSubscriptionPaywall) {
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41 SubscriptionPaywall(showingSubscriptionPaywall: $showingSubscriptionPaywall)
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42 }
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43 .navigationTitle(Text("Currencies", comment: "Navigation title"))
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44 .navigationBarTitleDisplayMode(.inline)
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45 .toolbar {
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46 ToolbarItem(placement: .cancellationAction) {
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47 Button(action: { showingCurrencySelector = false }) {
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48 Text("Cancel", comment: "Button to dismiss currency selector")
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49 }
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50 }
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51 }
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52 }
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53 .alert(isPresented: $showingAlert) {
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54 Alert(title: Text(alertTitle), message: Text(alertMessage), dismissButton: .default(Text("Ok")))
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55 }
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56 }
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58 /*
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59 If searched currency string is empty:
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60 * Show all currencies
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61 else:
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62 * Show filtered list of currencies containing searched currency string
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63 */
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64 private func currencyPairs() -> [String] {
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65 let currencyPairs: [String] = parseJson("CurrencyPairs.json")
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66
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67 if searchCurrency.isEmpty {
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68 return currencyPairs
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69 } else {
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70 return currencyPairs.filter { $0.contains(searchCurrency.uppercased()) }
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71 }
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72 }
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75 /*
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76 If user is subscribed:
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77 * Select currency and dismiss currency selector
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78 else:
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79 * Show subscription paywall
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80 */
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81 private func select(_ currencyPair: String) {
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82 #if targetEnvironment(simulator)
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83 // We're in simulator
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84 self.currencyPair = currencyPair
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85 showingCurrencySelector = false
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86 #else
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87 // We're in physical device
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88 Purchases.shared.purchaserInfo { (purchaserInfo, error) in
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89 if purchaserInfo?.entitlements["all"]?.isActive == true {
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90 self.currencyPair = currencyPair
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91 showingCurrencySelector = false
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92 } else {
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93 showingSubscriptionPaywall = true
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94 }
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96 if let error = error as NSError? {
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97 alertTitle = error.localizedDescription
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98 alertMessage = error.localizedFailureReason ?? ""
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99 showingAlert = true
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100 }
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101 }
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102 #endif
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103 }
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104 }
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105
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106
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107 struct CurrencySelector_Previews: PreviewProvider {
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108 static var previews: some View {
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109 CurrencySelector(currencyPair: .constant("USD/GBP"), showingCurrencySelector: .constant(false))
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110 }
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111 }