Mercurial > public > lazybear

annotate LazyBear/Views/Company/Chart.swift @ 413:2984d8946342

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Minor UI changes
author Dennis Concepción Martín <66180929+denniscm190@users.noreply.github.com>
date Wed, 09 Jun 2021 10:23:52 +0200
parents a7c9dd0c5822
children 34f9e408b861
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1 //
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2 // Chart.swift
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3 // LazyBear
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4 //
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5 // Created by Dennis Concepción Martín on 8/5/21.
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6 //
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7
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8 import SwiftUI
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9 import StockCharts
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10
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11 struct Chart: View {
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12 @ObservedObject var company: Company
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13 var symbol: String
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14
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15 // Date picker
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16 var ranges = ["1D", "5D", "1M", "3M", "6M", "1Y", "5Y"]
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17 @State private var selectedRange = "3M"
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18
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19 // Set recurrent price request
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20 @State private var timer = Timer.publish(every: 10, on: .main, in: .common).autoconnect()
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21
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22 var body: some View {
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23 if company.showChartView {
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24 VStack {
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25 DatePicker(ranges: ranges, selectedRange: $selectedRange)
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26 .onChange(of: selectedRange, perform: { range in
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27 let url = "https://api.lazybear.app/company/chart/symbol=\(symbol)/type=refresh/range=\(range.lowercased())"
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28 company.request(url, .refresh, "chart")
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29 })
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30
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31 RoundedRectangle(cornerRadius: 15)
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32 .foregroundColor(Color(.secondarySystemBackground))
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33 .frame(height: 270)
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34 .overlay(
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35 VStack {
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36 HStack {
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37 if let quote = company.chartData.quote![symbol.uppercased()] {
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38 let latestPrice = quote.latestPrice ?? 0
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39 let changePercent = quote.changePercent ?? 0
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40 let priceViewStyle = PriceViewStyle(
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41 horizontalAlignment: .leading,
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42 verticalAlignment: .center,
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43 orientation: .HStack,
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44 priceFont: .title3,
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45 priceFontWeight: .semibold,
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46 percentFont: .headline,
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47 percentFontWeight: .medium,
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48 showBackground: true
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49 )
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50 PriceView(latestPrice: latestPrice, changePercent: changePercent, style: priceViewStyle)
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51 }
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52 Spacer()
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53 }
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54 .padding([.top, .leading, .trailing])
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55
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56 Spacer()
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57 if let historicalPrices = company.chartData.historicalPrices {
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58 let prices = historicalPrices.compactMap { $0.close }
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59 let dates = historicalPrices.compactMap { $0.date }
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60 // let hours = historicalPrices.compactMap { $0.minute }
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61 LineChartView(data: prices, dates: dates, hours: nil, dragGesture: true)
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62 .padding(.bottom)
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63 }
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64 }
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65 )
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66
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67 if let latestNews = company.chartData.latestNews {
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68 VStack(spacing: 20) {
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69 ForEach(latestNews, id: \.self) { new in
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70 NewsRow(new: new)
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71 }
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72 }
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73 .padding(.top)
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74 }
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75 }
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76 .onAppear { self.timer = Timer.publish(every: 10, on: .main, in: .common).autoconnect() } // Start timer
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77 .onDisappear { self.timer.upstream.connect().cancel() } // Stop timer
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78 .onReceive(timer) { _ in
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79 let url = "https://api.lazybear.app/company/chart/symbol=\(symbol)/type=streaming"
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80 company.request(url, .streaming, "chart") } // Receive timer notification
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81 } else {
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82 ProgressView()
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83 .onAppear {
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84 let url = "https://api.lazybear.app/company/chart/symbol=\(symbol)/type=init"
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85 company.request(url, .initial, "chart")
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86 }
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87 }
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88 }
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89
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90 /*
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91 Price data is cached, so when the view disappears and appears again in a few seconds, the cached data is shown up. But the date range
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92 is incorrect because, always when this view appears, selectedRange is "3M".
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93 */
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94 private func checkDateRange() {
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95
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96 }
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97 }
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98
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99 struct Chart_Previews: PreviewProvider {
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100 static var previews: some View {
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101 Chart(company: Company(), symbol: "aapl")
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102 }
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103 }