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/*
* This file is part of GNU Taler, ©2022-23 Taler Systems S.A.
* See LICENSE.md
*/
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
// @Binding var balances: [Balance]
let navTitle: String
#if TABBAR // Taler Wallet
#else // GNU Taler
var hamburgerAction: () -> Void
#endif
@EnvironmentObject private var model: WalletModel
@State var showAlert: Bool = false
@State var newExchange: String = TESTEXCHANGE
func addExchange(_ exchange: String) -> Void {
Task { // runs on MainActor
symLog.log("adding: \(exchange)")
do {
try await model.addExchange(url: exchange)
symLog.log("added: \(exchange)")
} catch { // TODO: error handling - couldn't add exchangeURL
symLog.log("error: \(error)")
}
}
}
var body: some View {
#if TABBAR // Taler Wallet
let hamburger: HamburgerButton? = nil
#else // GNU Taler
let hamburger = HamburgerButton(action: hamburgerAction)
#endif
let accessibilityLabelStr = String(localized: "Add Exchange", comment: "accessibilityLabel for the + button")
let plusButton = PlusButton(accessibilityLabelStr: accessibilityLabelStr) {
showAlert = true
}
let addTitleStr = String(localized: "Add Exchange", comment: "title of the addExchange alert")
let addButtonStr = String(localized: "Add", comment: "button in the addExchange alert")
if #available(iOS 16.0, *) {
ExchangeListCommonV(symLog: symLog, stack: stack.push())
.navigationTitle(navTitle)
.navigationBarItems(leading: hamburger, trailing: plusButton)
.alert(addTitleStr, isPresented: $showAlert) {
TextField("Exchange address", text: $newExchange)
Button(addButtonStr) {
addExchange(newExchange)
}.buttonStyle(.borderedProminent)
Button("Cancel", role: .cancel) { }
} message: {
Text("Please enter the exchange URL")
}
} else { // iOS 15 cannot have a textfield in an alert, so we must
ExchangeListCommonV(symLog: symLog, stack: stack.push())
.navigationTitle(navTitle)
.navigationBarItems(leading: hamburger, trailing: plusButton)
.textFieldAlert(isPresented: $showAlert,
title: addTitleStr,
doneText: addButtonStr,
text: $newExchange) { text in
addExchange(text)
}
}
}
}
struct ExchangeListCommonV: View {
let symLog: SymLogV?
let stack: CallStack
// @Binding var balances: [Balance]
@EnvironmentObject private var model: WalletModel
@State private var exchanges: [Exchange] = []
// source of truth for the value the user enters in currencyField for exchange withdrawals
@State private var centsToTransfer: UInt64 = 0 // TODO: different values for different currencies?
func reloadExchanges() async -> Void {
exchanges = await model.listExchangesM()
}
var body: some View {
#if DEBUG
let _ = Self._printChanges()
let _ = symLog?.vlog() // just to get the # to compare it with .onAppear & onDisappear
#endif
//Text("Exchanges...")
Content(symLog: symLog,
stack: stack.push(),
// balances: $balances,
exchanges: $exchanges,
centsToTransfer: $centsToTransfer,
reloadExchanges: reloadExchanges)
.overlay {
if exchanges.isEmpty {
Text("No Exchanges yet...")
.accessibilityFont(.body)
}
}
.task {
symLog?.log(".task")
await reloadExchanges()
}
}
}
// MARK: -
extension ExchangeListCommonV {
struct Content: View {
let symLog: SymLogV?
let stack: CallStack
@AppStorage("myListStyle") var myListStyle: MyListStyle = .automatic
// @Binding var balances: [Balance]
@Binding var exchanges: [Exchange]
@Binding var centsToTransfer: UInt64
var reloadExchanges: () async -> Void
func currenciesDict(_ exchanges: [Exchange]) -> [String : [Exchange]] {
var currencies: [String : [Exchange]] = [:]
for exchange in exchanges {
let currency = exchange.currency ?? "Unknown"
if currencies[currency] != nil {
currencies[currency]!.append(exchange)
} else {
currencies[currency] = [exchange]
}
}
return currencies
}
// @State private var exchangeAmount: ExchangeAmount? = nil
var body: some View {
let dict = currenciesDict(exchanges)
let sortedDict = dict.sorted{ $0.key < $1.key}
Group { // necessary for .backslide transition (bug in SwiftUI)
List(sortedDict, id: \.key) { key, value in
ExchangeSectionView(stack: stack.push(),
currency: key, exchanges: value,
centsToTransfer: $centsToTransfer)
}
.refreshable {
symLog?.log("refreshing")
await reloadExchanges()
}
.listStyle(myListStyle.style).anyView
}
.onAppear() {
DebugViewC.shared.setViewID(VIEW_EXCHANGES, stack: stack.push())
}
.onNotification(.ExchangeAdded) { notification in
// doesn't need to be received on main thread because we just reload in the background anyway
symLog?.log(".onNotification(.ExchangeAdded) ==> reloading exchanges")
Task { await reloadExchanges() } // runs on MainActor
}
} // body
}
}
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