taler-ios

ExchangeListView.swift (5202B)

---

 /*
  * This file is part of GNU Taler, ©2022-25 Taler Systems S.A.
  * See LICENSE.md
  */
 /**
  * @author Marc Stibane
  */
 import SwiftUI
 import taler_swift
 import SymLog
 
 /// This view shows the list of exchanges
 struct ExchangeListView: View {
     private let symLog = SymLogV(0)
     let stack: CallStack
     let navTitle: String
     @EnvironmentObject private var model: WalletModel
     @EnvironmentObject private var controller: Controller
 
     @State var showAlert: Bool = false
     @State var newExchange: String = TESTEXCHANGE
 
     @MainActor
     func addExchange(_ exchange: String) -> Void {
         Task { // runs on MainActor
             symLog.log("adding: \(exchange)")
             if let _ = try? await model.addExchange(uri: exchange) {
                 symLog.log("added: \(exchange)")
                 announce("added: \(exchange)")
                 NotificationCenter.default.post(name: .ExchangeAdded, object: nil, userInfo: nil)
                 NotificationCenter.default.post(name: .BalanceChange, object: nil, userInfo: nil)       // TODO: ExchangeAdded should suffice
             }
         }
     }
 
     var body: some View {
         let a11yLabelStr = String(localized: "Add payment service", comment: "a11y for the + button")
         let plusButton = PlusButton(accessibilityLabelStr: a11yLabelStr) {
             showAlert = true
         }
         let addTitleStr = String(localized: "Add payment service", comment: "title of the addExchange alert")
         let addButtonStr = String(localized: "Add", comment: "button in the addExchange alert")
         let enterURL = String(localized: "Enter the URL")
         if #available(iOS 16.4, *) {
             ExchangeListCommonV(symLog: symLog, stack: stack.push())
                 .navigationTitle(navTitle)
                 .navigationBarItems(trailing: plusButton)
                 .alert(addTitleStr, isPresented: $showAlert) {
                     TextField("Address of the payment service", text: $newExchange)
                         .accessibilityLabel(enterURL)
 //                    .textFieldStyle(.roundedBorder)   Yikes: when adding style the alert will stop showing the textfield! Don't do this.
                     Button(addButtonStr) {
                         addExchange(newExchange)
                     }
                     Button("Cancel", role: .cancel) { }
                 } message: {
                     Text(enterURL)
                         .accessibilityHidden(true)
                 }
         } else {    // iOS 15 cannot have a textfield in an alert, so we must
             ExchangeListCommonV(symLog: symLog, stack: stack.push())
                 .navigationTitle(navTitle)
                 .navigationBarItems(trailing: plusButton)
                 .textFieldAlert(isPresented: $showAlert,
                                       title: addTitleStr,
                                    doneText: addButtonStr,
                                        text: $newExchange) { text in
                     addExchange(text)
                 }
         }
     }
 }
 // MARK: -
 struct ExchangeListCommonV: View {
     let symLog: SymLogV?
     let stack: CallStack
 
     @EnvironmentObject private var controller: Controller
     @AppStorage("minimalistic") var minimalistic: Bool = false
     @AppStorage("myListStyle") var myListStyle: MyListStyle = .automatic
 
     var body: some View {
 #if PRINT_CHANGES
         let _ = Self._printChanges()
         let _ = symLog?.vlog()       // just to get the # to compare it with .onAppear & onDisappear
 #endif
         let balanceList = List(Array(controller.balances.enumerated()), id: \.element) { index, balance in
             ExchangeSectionView(stack: stack.push(),
                               balance: balance,
                              thousand: index * MAXEXCHANGES)        // unique ID
         }
 
         let emptyList = List {
             Section {
                 Text("There are no payment services yet.")
                     .talerFont(.title3)
             }
             Section {
                 let plus = Image(systemName: "plus")
                 if !minimalistic {
                     Text("Tap the \(plus) button to add a service.")
                         .listRowSeparator(.hidden)
                     Text("You can also scan a withdrawal QR code from your bank in the Action menu to automatically add a payment service.")
                 } else {
                     Text("Tap \(plus) or scan a withdrawal QR code from your bank to add a payment service.")
                 }
             }
                 .talerFont(.body)
         }
 
         Group {
             if controller.balances.isEmpty {
                 emptyList
             } else {
                 balanceList                 // sorted by wallet-core
             }
         }
         .listStyle(myListStyle.style).anyView
         .refreshable {
             controller.hapticNotification(.success)
             symLog?.log("refreshing")
 //            await reloadExchanges()
             NotificationCenter.default.post(name: .BalanceChange, object: nil, userInfo: nil)
         }
         .onAppear() {
             DebugViewC.shared.setViewID(VIEW_PAYMENT_SERVICES, stack: stack.push())
         }
     } // body
 }