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annotate Simoleon/Favourites.swift @ 24:bda6a55d027a

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Add Conversion to Favourites
author Dennis Concepción Martín <dennisconcepcionmartin@gmail.com>
date Tue, 20 Jul 2021 10:24:21 +0100
parents 3596690dda73
children d95582268b44
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1 //
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2 // Favourites.swift
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3 // Simoleon
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4 //
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5 // Created by Dennis Concepción Martín on 19/07/2021.
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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 Favourites: View {
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11 @Environment(\.managedObjectContext) private var viewContext
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12 @FetchRequest(
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13 sortDescriptors: [NSSortDescriptor(keyPath: \Favourite.currencyPair, ascending: true)],
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14 animation: .default)
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15 private var favourite: FetchedResults<Favourite>
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16
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17 var body: some View {
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18 List {
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19 ForEach(favourite) { favourite in
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20 NavigationLink(destination: Conversion(fetchUserSettings: false, currencyPair: favourite.currencyPair)) {
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21 CurrencyRow(currencyPair: favourite.currencyPair)
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22 }
21
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23 }
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24 .onDelete(perform: removeFromFavourites)
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25 }
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26 .navigationTitle("Favourites")
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27 .toolbar {
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28 #if os(iOS)
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29 EditButton()
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30 #endif
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31 }
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32 .if(UIDevice.current.userInterfaceIdiom == .phone) { content in
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33 NavigationView { content }
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34 }
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35 }
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36
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37 private func removeFromFavourites(offsets: IndexSet) {
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38 withAnimation {
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39 offsets.map { favourite[$0] }.forEach(viewContext.delete)
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40
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41 do {
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42 try viewContext.save()
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43 } catch {
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44 let nsError = error as NSError
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45 fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
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46 }
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47 }
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48 }
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49 }
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50
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51 struct Favourites_Previews: PreviewProvider {
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52 static var previews: some View {
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53 Favourites()
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54 .environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
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55 }
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56 }