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annotate LazyBear/ContentView.swift @ 465:6953d83060a4

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New design
author Dennis Concepción Martín <dennisconcepcionmartin@gmail.com>
date Sat, 17 Jul 2021 17:58:57 +0100
parents 783b567800d9
children
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1 //
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2 // ContentView.swift
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3 // lazybear
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4 //
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5 // Created by Dennis Concepción Martín on 17/07/2021.
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6 //
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7
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8 import SwiftUI
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9 import CoreData
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11 struct ContentView: View {
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12 @State private var tab: Tab = .watchlist
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13 @Environment(\.managedObjectContext) private var viewContext
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14 @FetchRequest(sortDescriptors: []) private var companies: FetchedResults<Company>
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16 var body: some View {
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17 TabView(selection: $tab) {
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18 Watchlist()
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19 .tabItem {
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20 Image(systemName: "list.star")
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21 Text("Watchlist")
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22 }
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23 .tag(Tab.watchlist)
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24
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25 Search()
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26 .tabItem {
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27 Image(systemName: "magnifyingglass")
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28 Text("Search")
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29 }
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30 .tag(Tab.search)
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31 }
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32 .onAppear(perform: createDefaultWatchlist)
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33 }
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34
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35 private enum Tab {
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36 case watchlist, search, settings
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37 }
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38
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39 // MARK: - Create default watchlist
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40 private func createDefaultWatchlist() {
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41 if companies.isEmpty {
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42 let defaultCompanies = [
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43 "AAPL": "Apple Inc",
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44 "AMZN": "Amazon.com Inc.",
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45 "BRK.A": "Berkshire Hathaway Inc.",
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46 "GS": "Goldman Sachs Group, Inc.",
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47 "TSLA": "Tesla Inc",
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48 "MSFT": "Microsoft Corporation",
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49 "WMT": "Walmart Inc",
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50 "DIS": "Walt Disney Co (The)",
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51 "NKE": "Nike, Inc."
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52 ]
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53
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54 for defaultCompany in defaultCompanies {
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55 withAnimation {
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56 let company = Company(context: viewContext)
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57 company.symbol = defaultCompany.key
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58 company.companyName = defaultCompany.value
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60 do {
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61 try viewContext.save()
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62 } catch {
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63 let nsError = error as NSError
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64 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
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65 }
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66 }
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69 }
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70 }
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73 struct ContentView_Previews: PreviewProvider {
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74 static var previews: some View {
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75 ContentView()
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76 .environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
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78 }
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79 }