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annotate Simoleon/UI/CurrencySelector.swift @ 170:f4e0c414cf6d

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minor UI changes
author Dennis Concepcion Martin <dennisconcepcionmartin@gmail.com>
date Thu, 23 Sep 2021 15:14:48 +0200
parents 3913aff613e8
children
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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 27/8/21.
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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 CurrencySelector: View {
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11 @ObservedObject var currencyConversion: CurrencyConversion
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12 @State private var modalSelection: ModalType = .allCurrencies
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13 @State private var showingList = false
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14
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15 let currencyPairsSupported: [String] = try! readJson(from: "CurrencyPairsSupported.json")
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16
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17 private enum ModalType {
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18 case allCurrencies, compatibleCurrencies
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19 }
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20
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21 var body: some View {
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22 HStack {
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23 Button(action: {
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24 modalSelection = .allCurrencies
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25 showingList = true
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26 }) {
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27 CurrencyButton(selectedCurrency: currencyConversion.baseSymbol)
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28 }
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29
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30 Button(action: {
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31 modalSelection = .compatibleCurrencies
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32 showingList = true
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33 }) {
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34 CurrencyButton(selectedCurrency: currencyConversion.quoteSymbol)
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35 }
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36 }
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37 .onChange(of: currencyConversion.baseSymbol) { _ in
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38 // If the previous quote symbol is not compatible anymore with base symbol
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39 // return the first symbol of the new compatible symbols list
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40 let compatibleCurrencies = get(currencyType: .compatible(with: currencyConversion.baseSymbol), from: currencyPairsSupported)
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41 if !compatibleCurrencies.contains(currencyConversion.quoteSymbol) {
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42 currencyConversion.quoteSymbol = compatibleCurrencies.sorted().first!
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43 }
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44 }
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45 .sheet(isPresented: $showingList) {
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46 if modalSelection == .allCurrencies {
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47 let currencies = get(currencyType: .all, from: currencyPairsSupported)
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48 CurrencyList(currencies: currencies, selection: .baseSymbol, currencyConversion: currencyConversion)
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49 } else {
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50 let currencies = get(currencyType: .compatible(with: currencyConversion.baseSymbol), from: currencyPairsSupported)
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51 CurrencyList(currencies: currencies, selection: .quoteSymbol, currencyConversion: currencyConversion)
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52 }
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53 }
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54 }
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55
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56 enum CurrencyType {
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57 case all
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58 case compatible(with: String)
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59 }
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60
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61 func get(currencyType: CurrencyType, from currencyPairsSupported: [String]) -> [String] {
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62 var currencies = Set<String>()
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63
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64 switch currencyType {
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65 case .all:
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66 for currencyPairSupported in currencyPairsSupported {
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67 let currency = currencyPairSupported.components(separatedBy: "/")[0]
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68 currencies.insert(currency)
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69 }
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70
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71 return Array(currencies)
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72
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73 case .compatible(with: let symbol):
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74 for currencyPairSupported in currencyPairsSupported {
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75 if currencyPairSupported.hasPrefix(symbol) {
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76 let compatibleCurrency = currencyPairSupported.components(separatedBy: "/")[1]
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77 currencies.insert(compatibleCurrency)
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78 }
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79 }
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80
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81 return Array(currencies)
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82 }
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83 }
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84 }
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85
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86 struct CurrencySelector_Previews: PreviewProvider {
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87 static var previews: some View {
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88 CurrencySelector(currencyConversion: CurrencyConversion())
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89 }
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90 }