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annotate Simoleon/UI/ConversionBox.swift @ 160:0c589138a6f3

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Implement Conversion Box
author Dennis Concepcion Martin <dennisconcepcionmartin@gmail.com>
date Sun, 29 Aug 2021 19:04:34 +0100
parents 84137052813d
children 3913aff613e8
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1 //
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2 // ConversionBox.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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7
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8 import SwiftUI
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9
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10 struct ConversionBox: View {
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11 @ObservedObject var currencyPair: CurrencyPair
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12 @State private var amount = ""
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13 @State private var isEditing = false
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14 @State private var showingConversion = false
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15 @State private var currencyQuote = CurrencyQuoteModel()
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16 @State private var showingAlert = false
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17
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18 let networkHelper = NetworkHelper()
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19 let currencyDetails: [String: CurrencyModel] = try! readJson(from: "Currencies.json")
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20
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21 var body: some View {
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22 VStack(alignment: .leading) {
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23 let baseCurrencyName = currencyDetails[currencyPair.baseSymbol]!.name
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24 Text("\(baseCurrencyName) (\(currencyPair.baseSymbol))")
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25 .font(.callout)
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26 .fontWeight(.semibold)
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27
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28 ConversionTextfield(amount: $amount, isEditing: $isEditing)
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29 Divider()
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30
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31 let quoteCurrencyName = currencyDetails[currencyPair.quoteSymbol]!.name
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32 Text("\(quoteCurrencyName) (\(currencyPair.quoteSymbol))")
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33 .font(.callout)
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34 .fontWeight(.semibold)
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35
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36 if showingConversion {
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37 let conversion = convert()
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38 Text("\(conversion, specifier: "%.2f")")
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39 .font(Font.title.weight(.semibold))
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40 .lineLimit(1)
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41 } else {
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42 ProgressView()
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43 }
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44 }
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45 .toolbar {
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46 ToolbarItem(placement: .navigationBarTrailing) {
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47 if isEditing {
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48 Button(action: {
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49 UIApplication.shared.dismissKeyboard()
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50 isEditing = false
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51 }) {
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52 Text("Done")
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53 }
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54 }
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55 }
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56 }
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57
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58 .onAppear {
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59 showingConversion = false
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60 let pair = "\(currencyPair.baseSymbol)/\(currencyPair.quoteSymbol)"
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61 let apiKey = readConfig(withKey: "API_KEY")!
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62 let url = "https://api.1forge.com/quotes?pairs=\(pair)&api_key=\(apiKey)"
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63 try? networkHelper.httpRequest(url: url, model: [CurrencyQuoteModel].self) { response in
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64 if let currencyQuote = response.first {
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65 self.currencyQuote = currencyQuote
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66 } else {
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67 showingAlert = true
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68 }
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69
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70 showingConversion = true
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71 }
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72 }
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73 .alert(isPresented: $showingAlert) {
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74 Alert(
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75 title: Text("Currencies not supported."),
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76 message: Text("Currently, we are unable to convert from \(currencyPair.baseSymbol) to \(currencyPair.quoteSymbol)."),
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77 dismissButton: .default(Text("Dismiss")
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78 )
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79 )
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80 }
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81 }
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82
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83 private func convert() -> Double {
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84 guard let amount = Double(amount) else { return 0 }
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85 guard let price = currencyQuote.price else { return 0 }
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86
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87 return amount * price
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88 }
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89 }
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90
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91 struct ConversionBox_Previews: PreviewProvider {
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92 static var previews: some View {
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93 ConversionBox(currencyPair: CurrencyPair())
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94 }
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95 }