metatext/Views/TabNavigationView.swift
Justin Mazzocchi 9a2fae9e4c
Refactoring
2020-09-09 16:40:40 -07:00

165 lines
5.7 KiB
Swift

// Copyright © 2020 Metabolist. All rights reserved.
import KingfisherSwiftUI
import enum Mastodon.Timeline
import SwiftUI
import ViewModels
struct TabNavigationView: View {
@ObservedObject var viewModel: NavigationViewModel
@EnvironmentObject var rootViewModel: RootViewModel
@Environment(\.displayScale) var displayScale: CGFloat
var body: some View {
TabView(selection: $viewModel.selectedTab) {
ForEach(viewModel.tabs) { tab in
NavigationView {
view(tab: tab)
}
.navigationViewStyle(StackNavigationViewStyle())
.tabItem {
Label(tab.title, systemImage: tab.systemImageName)
.accessibility(label: Text(tab.title))
}
.tag(tab)
}
}
.environmentObject(viewModel.identification)
.sheet(isPresented: $viewModel.presentingSecondaryNavigation) {
SecondaryNavigationView(viewModel: viewModel)
.environmentObject(viewModel)
.environmentObject(rootViewModel)
}
.alertItem($viewModel.alertItem)
.onAppear(perform: viewModel.refreshIdentity)
.onReceive(NotificationCenter.default
.publisher(for: UIScene.willEnterForegroundNotification)
.map { _ in () },
perform: viewModel.refreshIdentity)
}
}
private extension TabNavigationView {
@ViewBuilder
func view(tab: NavigationViewModel.Tab) -> some View {
switch tab {
case .timelines:
StatusListView(viewModel: viewModel.viewModel(timeline: viewModel.timeline))
.id(viewModel.timeline.id)
.edgesIgnoringSafeArea(.all)
.navigationBarTitle(viewModel.timeline.title, displayMode: .inline)
.toolbar {
ToolbarItem(placement: .principal) {
VStack {
Text(viewModel.timeline.title)
.font(.headline)
Text(viewModel.timelineSubtitle)
.font(.footnote)
.foregroundColor(.secondary)
}
}
}
.navigationBarItems(
leading: secondaryNavigationButton,
trailing: Menu {
ForEach(viewModel.timelinesAndLists) { timeline in
Button {
viewModel.timeline = timeline
} label: {
Label(timeline.title,
systemImage: timeline.systemImageName)
}
}
} label: {
Image(systemName: viewModel.timeline.systemImageName)
})
default: Text(tab.title)
}
}
@ViewBuilder
var secondaryNavigationButton: some View {
Button {
viewModel.presentingSecondaryNavigation.toggle()
} label: {
KFImage(viewModel.identification.identity.image,
options: .downsampled(dimension: 28, scaleFactor: displayScale))
.placeholder { Image(systemName: "gear") }
.renderingMode(.original)
.contextMenu(ContextMenu {
ForEach(viewModel.recentIdentities) { recentIdentity in
Button {
rootViewModel.identitySelected(id: recentIdentity.id)
} label: {
Label(
title: { Text(recentIdentity.handle) },
icon: {
KFImage(recentIdentity.image,
options: .downsampled(dimension: 28, scaleFactor: displayScale))
.renderingMode(.original)
})
}
}
})
}
}
}
private extension Timeline {
var title: String {
switch self {
case .home:
return NSLocalizedString("timelines.home", comment: "")
case .local:
return NSLocalizedString("timelines.local", comment: "")
case .federated:
return NSLocalizedString("timelines.federated", comment: "")
case let .list(list):
return list.title
case let .tag(tag):
return "#" + tag
}
}
var systemImageName: String {
switch self {
case .home: return "house"
case .local: return "person.3"
case .federated: return "globe"
case .list: return "scroll"
case .tag: return "number"
}
}
}
extension NavigationViewModel.Tab {
var title: String {
switch self {
case .timelines: return "Timelines"
case .explore: return "Explore"
case .notifications: return "Notifications"
case .messages: return "Messages"
}
}
var systemImageName: String {
switch self {
case .timelines: return "newspaper"
case .explore: return "magnifyingglass"
case .notifications: return "bell"
case .messages: return "envelope"
}
}
}
#if DEBUG
import PreviewViewModels
struct TabNavigation_Previews: PreviewProvider {
static var previews: some View {
TabNavigationView(viewModel: NavigationViewModel(identification: .preview))
.environmentObject(Identification.preview)
.environmentObject(RootViewModel.preview)
}
}
#endif