Mercurial > public > simoleon

annotate Simoleon/Helpers/CurrencyConversion.swift @ 17:4a81e39186f1 v1.0

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Minor UI changes
author Dennis Concepción Martín <dennisconcepcionmartin@gmail.com>
date Thu, 15 Jul 2021 20:24:13 +0100
parents aec2e86e5dbd
children
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1 //
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2 // CurrencyConversion.swift
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3 // Simoleon
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4 //
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5 // Created by Dennis Concepción Martín on 15/07/2021.
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6 //
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7
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8 import SwiftUI
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9 import Alamofire
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11 struct CurrencyConversion: View {
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12 var currency: String
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13 @State private var price: Double = 1.00
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14 @State private var amountToConvert = "100"
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15 @State private var isEditing = false
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16 @State private var showConversion = false
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17 let currencyMetadata: [String: CurrencyMetadataModel] = parseJson("CurrencyMetadata.json")
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18
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19 var body: some View {
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20 let currencies = currency.components(separatedBy: "/")
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21 let mainCurrency = String(currencies[0])
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22 let secondaryCurrency = String(currencies[1])
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23
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24 ScrollView(showsIndicators: false) {
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25 VStack(spacing: 20) {
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26 ZStack {
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27 Rectangle()
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28 .foregroundColor(Color(.secondarySystemBackground))
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29
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30 HStack {
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31 Image(currencyMetadata[mainCurrency]!.flag)
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32 .resizable()
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33 .aspectRatio(contentMode: .fill)
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34 .frame(width: 30, height: 30)
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35 .clipShape(Circle())
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36 .overlay(Circle().stroke(Color(.systemGray), lineWidth: 1))
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37
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38 TextField("Amount", text: $amountToConvert) { startedEditing in
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39 if startedEditing {
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40 withAnimation {
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41 isEditing = true
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42 }
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43 }
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44 }
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45 onCommit: {
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46 withAnimation {
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47 isEditing = false
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48 }
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49 }
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50 .keyboardType(.decimalPad)
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51 .lineLimit(1)
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52 .padding(.horizontal)
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53
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54 Text("\(mainCurrency)")
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55 .fontWeight(.semibold)
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56 }
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57 .padding(.horizontal)
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58 }
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59 .frame(height: 50)
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60 .cornerRadius(13)
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61
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62 ZStack {
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63 Rectangle()
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64 .foregroundColor(Color(.secondarySystemBackground))
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65
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66 HStack {
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67 Image(currencyMetadata[secondaryCurrency]!.flag)
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68 .resizable()
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69 .aspectRatio(contentMode: .fill)
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70 .frame(width: 30, height: 30)
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71 .clipShape(Circle())
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72 .overlay(Circle().stroke(Color(.systemGray), lineWidth: 1))
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73
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74 if showConversion {
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75 Text("\(makeConversion(), specifier: "%.4f")")
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76 .lineLimit(1)
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77 .padding(.horizontal)
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78 } else {
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79 ProgressView()
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80 .padding(.horizontal)
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81 }
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82
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83 Spacer()
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84 Text("\(secondaryCurrency)")
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85 .fontWeight(.semibold)
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86 }
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87 .padding(.horizontal)
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88 }
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89 .frame(height: 50)
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90 .cornerRadius(13)
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91
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92 if showConversion {
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93 Text("From \(currencyMetadata[mainCurrency]!.name) to \(currencyMetadata[secondaryCurrency]!.name) at \(price, specifier: "%.4f") exchange rate.")
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94 .multilineTextAlignment(.center)
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95 }
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97 }
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98 .padding()
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99 }
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100 .onAppear { requestApi(mainCurrency, secondaryCurrency) }
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101 .navigationTitle("Conversion")
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102 }
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103
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104 private func makeConversion() -> Double {
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105 if amountToConvert.isEmpty { /// Avoid nil error when string is empty
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106 return 0
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107 } else {
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108 let conversion = Double(amountToConvert)! * price
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109
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110 return conversion
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111 }
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112 }
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113
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114 private func requestApi(_ mainCurrency: String, _ secondaryCurrency: String) {
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115 let url = "https://api.simoleon.app/quotes=\(mainCurrency)-\(secondaryCurrency)"
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116 AF.request(url).responseDecodable(of: [CurrencyQuoteModel].self) { response in
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117 if let currencyQuotes = response.value {
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118 if let price = currencyQuotes[0].price {
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119 self.price = price
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120 }
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121 self.showConversion = true
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122 } else {
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123 // Handle error
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124 }
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125 }
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126 }
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127 }
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128
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129 struct CurrencyConversion_Previews: PreviewProvider {
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130 static var previews: some View {
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131 NavigationView {
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132 CurrencyConversion(currency: "USD/GBP")
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133 }
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134 }
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135 }