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import SwiftUI
struct InboxView: View {
@Environment(AppState.self) private var appState
@State private var viewModel: InboxViewModel?
@State private var selectedThreadID: InboxThreadSummary.ID?
@State private var selectedThreadSnapshot: InboxThreadSummary?
@State private var isShowingThreadDetail = false
var body: some View {
Group {
if let viewModel {
listContent(viewModel)
} else {
SRHTLoadingStateView(message: "Loading inbox…")
}
}
.navigationTitle("Inbox")
.task {
if viewModel == nil {
let vm = InboxViewModel(client: appState.client)
viewModel = vm
await vm.loadThreads()
}
}
}
@ViewBuilder
private func listContent(_ viewModel: InboxViewModel) -> some View {
@Bindable var vm = viewModel
List {
ForEach(viewModel.threads) { thread in
Button {
selectThread(thread)
} label: {
InboxThreadRow(thread: thread)
}
.buttonStyle(.plain)
.swipeActions(edge: .leading, allowsFullSwipe: true) {
readStateAction(for: thread, in: viewModel)
}
.swipeActions(edge: .trailing, allowsFullSwipe: true) {
readStateAction(for: thread, in: viewModel)
}
}
}
.listStyle(.plain)
.overlay {
if viewModel.isLoading, viewModel.threads.isEmpty {
SRHTLoadingStateView(message: "Loading inbox…")
} else if let error = viewModel.error, viewModel.threads.isEmpty {
SRHTErrorStateView(
title: "Failed to load inbox",
message: error,
retryAction: { await viewModel.loadThreads() }
)
} else if viewModel.threads.isEmpty, viewModel.error == nil {
ContentUnavailableView(
"Inbox Zero",
systemImage: "tray",
description: Text("Unread threads will appear here.")
)
}
}
.connectivityOverlay(hasContent: !viewModel.threads.isEmpty) {
await viewModel.loadThreads()
}
.srhtErrorBanner(error: $vm.error)
.refreshable {
await viewModel.loadThreads()
}
.onChange(of: viewModel.threads) { _, threads in
syncSelectedThreadSnapshot(with: threads)
}
.navigationDestination(isPresented: Binding(
get: { isShowingThreadDetail && selectedThread(for: viewModel) != nil },
set: { isPresented in
if !isPresented {
clearSelection()
}
isShowingThreadDetail = isPresented
}
)) {
if let thread = selectedThread(for: viewModel) {
ThreadDetailView(thread: thread) {
viewModel.markThreadRead(thread)
}
.onAppear {
cacheSelectedThread(thread)
}
.onDisappear {
handleThreadDetailDisappear(for: thread.id)
}
} else {
ContentUnavailableView(
"Thread Unavailable",
systemImage: "tray",
description: Text("This thread could not be restored.")
)
}
}
}
@ViewBuilder
private func readStateAction(for thread: InboxThreadSummary, in viewModel: InboxViewModel) -> some View {
Button {
withAnimation(.easeInOut(duration: 0.2)) {
viewModel.markThreadRead(thread)
}
} label: {
Label("Mark as Read", systemImage: "envelope.open")
}
.tint(.blue)
}
private func selectThread(_ thread: InboxThreadSummary) {
cacheSelectedThread(thread)
isShowingThreadDetail = true
}
private func cacheSelectedThread(_ thread: InboxThreadSummary) {
selectedThreadID = thread.id
selectedThreadSnapshot = thread
}
private func selectedThread(for viewModel: InboxViewModel) -> InboxThreadSummary? {
guard let selectedThreadID else { return selectedThreadSnapshot }
return viewModel.thread(withID: selectedThreadID) ?? (selectedThreadSnapshot?.id == selectedThreadID ? selectedThreadSnapshot : nil)
}
private func handleThreadDetailDisappear(for threadID: String) {
let isActiveSelection = selectedThreadID == threadID
guard isActiveSelection else { return }
clearSelection()
}
private func syncSelectedThreadSnapshot(with threads: [InboxThreadSummary]) {
guard let selectedThreadID else { return }
guard let updatedThread = threads.first(where: { $0.id == selectedThreadID }) else { return }
selectedThreadSnapshot = updatedThread
}
private func clearSelection() {
selectedThreadID = nil
selectedThreadSnapshot = nil
isShowingThreadDetail = false
}
}
struct InboxThreadRow: View {
let thread: InboxThreadSummary
var body: some View {
HStack(alignment: .top, spacing: 12) {
Circle()
.fill(thread.isUnread ? .blue : .clear)
.frame(width: 8, height: 8)
.padding(.top, 6)
VStack(alignment: .leading, spacing: 4) {
Text(thread.displaySubject)
.font(.subheadline.weight(thread.isUnread ? .semibold : .medium))
.lineLimit(2)
HStack(spacing: 8) {
if thread.containsPatch {
Image(systemName: "arrow.triangle.branch")
.font(.caption)
.foregroundStyle(.secondary)
}
Text(thread.metadataLine)
.font(.caption)
.foregroundStyle(.secondary)
.lineLimit(1)
}
}
Spacer(minLength: 8)
Text(thread.lastActivityAt.relativeDescription)
.font(.caption)
.foregroundStyle(.tertiary.opacity(0.7))
.lineLimit(1)
}
.padding(.vertical, 2)
}
}
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