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/*
* This file is part of GNU Taler, ©2022-23 Taler Systems S.A.
* See LICENSE.md
*/
import SwiftUI
import SymLog
// Use this to delay instantiation when using `NavigationLink`, etc...
struct LazyView<Content: View>: View {
var content: () -> Content
var body: some View {
self.content()
}
}
struct MainView: View {
private let symLog = SymLogV(0)
let stack: CallStack
@EnvironmentObject private var viewState: ViewState // popToRootView()
@EnvironmentObject private var controller: Controller
@State private var sheetPresented = false
@State private var urlToOpen: URL? = nil
@Binding var soundPlayed: Bool
@AppStorage("talerFont") var talerFont: Int = 0 // extension mustn't define this, so it must be here
func sheetDismissed() -> Void {
symLog.log("sheet dismiss")
}
var body: some View {
#if DEBUG
let _ = Self._printChanges()
let _ = symLog.vlog() // just to get the # to compare it with .onAppear & onDisappear
#endif
Group {
if controller.backendState == .ready {
Content(symLog: symLog, stack: stack.push("Content"), talerFont: $talerFont)
// any change to rootViewId triggers popToRootView behaviour
.id(viewState.rootViewId)
.onAppear() {
controller.playSound(1008) // Startup chime
soundPlayed = true
}
} else if controller.backendState == .error {
ErrorView(errortext: nil) // TODO: show Error View
} else {
LaunchAnimationView()
}
}
.animation(.linear(duration: LAUNCHDURATION), value: controller.backendState)
.overlay(alignment: .top) {
// Show the viewID on top of the app's NavigationView
DebugViewV()
.id("ViewID")
}
.onOpenURL { url in
symLog.log(".onOpenURL: \(url)")
// will be called on a taler:// scheme either
// by user tapping such link in a browser (bank website)
// or when launching the app from iOS Camera.app scanning a QR code
urlToOpen = url // raise sheet
}
.sheet(item: $urlToOpen, onDismiss: sheetDismissed) { url in
let sheet = AnyView(URLSheet(stack: stack.push(), urlToOpen: url))
Sheet(sheetView: sheet)
}
} // body
}
// MARK: - TabBar
enum Tab {
case balances, exchanges, settings
}
// MARK: - Content
extension MainView {
struct Content: View {
let symLog: SymLogV?
let stack: CallStack
@State private var shouldReloadBalances = 0
@State private var balances: [Balance] = []
@Binding var talerFont: Int
@AppStorage("iconOnly") var iconOnly: Bool = false
@EnvironmentObject private var controller: Controller
@EnvironmentObject private var model: WalletModel
let balancesTitle = String(localized: "Balances")
let exchangesTitle = String(localized: "Exchanges")
let settingsTitle = String(localized: "Settings")
#if TABBAR // Taler Wallet
@State private var selectedTab: Tab = .balances
private func tabSelection() -> Binding<Tab> {
Binding { //this is the get block
self.selectedTab
} set: { tappedTab in
if tappedTab == self.selectedTab {
//User tapped on the tab twice == Pop to root view
// if homeNavigationStack.isEmpty {
//User already on home view, scroll to top
// } else {
// homeNavigationStack = []
// }
}
//Set the tab to the tabbed tab
self.selectedTab = tappedTab
}
}
#else // GNU Taler
@State var sidebarVisible: Bool = false
func hamburgerAction() {
withAnimation(.easeInOut(duration: 0.25)) {
sidebarVisible = !sidebarVisible
}
}
var views: [SidebarItem] {[
SidebarItem(name: balancesTitle,
sysImage: "chart.bar.xaxis", // creditcard.fill // TODO: Wallet Icon
view: AnyView(BalancesListView(stack: stack.push(balancesTitle),
navTitle: balancesTitle,
balances: $balances,
shouldReloadBalances: $shouldReloadBalances,
hamburgerAction: hamburgerAction)
)),
SidebarItem(name: exchangesTitle,
sysImage: "building.columns",
view: AnyView(ExchangeListView(stack: stack.push(exchangesTitle),
// balances: $balances,
navTitle: exchangesTitle,
hamburgerAction: hamburgerAction)
)),
SidebarItem(name: settingsTitle, // TODO: "About"?
sysImage: "gearshape.fill",
view: AnyView(SettingsView(stack: stack.push(settingsTitle),
navTitle: settingsTitle,
hamburgerAction: hamburgerAction)
))
]}
@State var currentView: Int = 0
#endif
var body: some View {
#if DEBUG
// "@self" marks that the view value itself has changed, and "@identity" marks that the
// identity of the view has changed (that is, that the persistent data associated with
// the view has been recycled for a new instance of the same type)
if #available(iOS 17.1, *) {
// logs at INFO level, “com.apple.SwiftUI” subsystem, category “Changed Body Properties”
let _ = Self._logChanges()
} else {
let _ = Self._printChanges()
}
let _ = symLog?.vlog() // just to get the identity # to compare with .onAppear & .onDisappear
#endif
Group {
#if TABBAR // Taler Wallet
// let labelStyle = iconOnly ? IconOnlyLabelStyle() : TitleAndIconLabelStyle() // labelStyle doesn't work
TabView(selection: tabSelection()) {
NavigationView {
BalancesListView(stack: stack.push(balancesTitle),
navTitle: balancesTitle,
balances: $balances,
shouldReloadBalances: $shouldReloadBalances)
}.navigationViewStyle(.stack)
.tabItem {
Image(systemName: "chart.bar.xaxis") // creditcard system will automatically use filled variant
if !iconOnly { Text(balancesTitle) }
}
.tag(Tab.balances)
.badge(0) // TODO: set badge if transaction finished in background
NavigationView {
ExchangeListView(stack: stack.push(exchangesTitle),
// balances: $balances,
navTitle: exchangesTitle)
}.navigationViewStyle(.stack)
.tabItem {
Image(systemName: "building.columns")
if !iconOnly { Text(exchangesTitle) }
}
.tag(Tab.exchanges)
NavigationView {
SettingsView(stack: stack.push(), navTitle: settingsTitle)
}.navigationViewStyle(.stack)
.tabItem {
Image(systemName: "gear") // system will automatically use filled variant
if !iconOnly { Text(settingsTitle) }
}
.tag(Tab.settings)
}
// .animation(.linear(duration: LAUNCHDURATION), value: selectedTab) doesn't work. Needs CustomTabView
#else // GNU Taler
ZStack(alignment: .leading) {
NavigationView { // the one and only for all non-sheet views
VStack(alignment: .leading) { // only needed for backslide transition
views[currentView].view
.id(views[currentView].name)
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .center)
.transition(.backslide)
} .id(talerFont)
.navigationBarTitleDisplayMode(.automatic)
.background(NavigationBarBuilder { navigationController in
// navigationController.navigationBar.barTintColor = .red
navigationController.navigationBar.titleTextAttributes =
[.font: TalerFont.uiFont(talerFont, size: 24, relativeTo: .title2)]
navigationController.navigationBar.largeTitleTextAttributes =
[.font: TalerFont.uiFont(talerFont, size: 38, relativeTo: .largeTitle)]
})
}
.navigationViewStyle(.stack)
.talerNavBar(talerFont: talerFont)
// The side view is above (Z-Axis) the current view
SideBarView(stack: stack.push(),
views: views,
currentView: $currentView,
sidebarVisible: sidebarVisible,
hamburgerAction: hamburgerAction)
}
#endif
}
.onNotification(.BalanceChange) { notification in
// reload balances on receiving BalanceChange notification ...
symLog?.log(".onNotification(.BalanceChange) ==> reload")
shouldReloadBalances += 1
}
.onChange(of: balances) { newArray in
for balance in newArray {
let scope = balance.scopeInfo
if controller.info(for: scope.currency) == nil {
Task { // runs on MainActor
symLog?.log("get info for: \(scope.currency)")
do {
let info = try await model.getCurrencyInfo(scope: scope)
symLog?.log("added: \(scope.currency)")
await controller.setInfo(info)
} catch { // TODO: error handling - couldn't get CurrencyInfo
symLog?.log("error: \(error)")
}
}
}
}
}
} // body
} // Content
}
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