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import SwiftUI
struct PostGridView: View {
@EnvironmentObject var settings: SettingsManager
@EnvironmentObject var manager: BooruManager
@State private var isSearchHistoryPresented = false
@Binding var selectedTab: Int
@State private var viewStates: [UUID: PostGridViewState] = [:]
@State private var isSearchablePresented = false
@State private var cachedSuggestions: [Either<BooruTag, BooruSearchQuery>] = []
@State private var suppressNextSearchSubmit = false
@Environment(\.isSearching)
private var isSearching
var filteredPosts: [BooruPost] {
manager.posts
.filter { settings.displayRatings.contains($0.rating) }
}
var body: some View {
ScrollViewReader { _ in
ZStack {
ForEach(Array(manager.searchHistory.enumerated()), id: \.element.id) { index, query in
let isActive = index == manager.historyIndex
let filteredPosts =
viewStates[query.id]?.posts
.filter { settings.displayRatings.contains($0.rating) } ?? []
ScrollView {
if filteredPosts.isEmpty && isActive {
ProgressView()
.padding()
}
let columnCount = settings.thumbnailGridColumns
let columnsData = (0..<columnCount).map { columnIndex in
filteredPosts.enumerated().compactMap { index, post in
index % columnCount == columnIndex ? post : nil
}
}
HStack(alignment: .top) {
ForEach(0..<columnCount, id: \.self) { columnIndex in
LazyVStack {
ForEach(columnsData[columnIndex], id: \.id) { post in
waterfallGridContent(post: post)
.id(post.id)
}
}
}
}
.padding(.horizontal)
}
.opacity(isActive ? 1 : 0)
.frame(height: isActive ? nil : 0)
}
}
.searchable(text: $manager.searchText, isPresented: $isSearchablePresented, prompt: "Tags")
.searchSuggestions {
if settings.searchSuggestionsMode != .disabled {
SearchSuggestionsView(
items: searchSuggestionsItems(),
searchText: $manager.searchText,
suppressNextSearchSubmit: $suppressNextSearchSubmit
)
}
}
.onAppear {
if settings.searchSuggestionsMode == .tags {
cachedSuggestions = manager.allTags.map { tag in
Either<BooruTag, BooruSearchQuery>.left(tag)
}
}
}
.onSubmit(of: .search) {
if suppressNextSearchSubmit {
suppressNextSearchSubmit = false
return
}
Task(priority: .userInitiated) {
await manager.performSearch(settings: settings)
}
}
.navigationDestination(for: BooruPost.self) { post in
PostDetailsView(post: post)
}
.onChange(of: isSearchablePresented) { _, isPresented in
if !isPresented, manager.searchText.isEmpty, !manager.isNavigatingHistory {
Task(priority: .userInitiated) { await manager.performSearch() }
}
}
.onChange(of: manager.posts) { _, newPosts in
if manager.historyIndex >= 0 && manager.historyIndex < manager.searchHistory.count {
let queryID = manager.searchHistory[manager.historyIndex].id
updateViewState(for: queryID, posts: newPosts)
}
}
.onChange(of: manager.currentPage) { _, newPage in
if manager.historyIndex >= 0 && manager.historyIndex < manager.searchHistory.count {
let queryID = manager.searchHistory[manager.historyIndex].id
updateViewState(for: queryID, currentPage: newPage)
}
}
.onChange(of: manager.historyIndex) { _, newIndex in
guard newIndex >= 0 && newIndex < manager.searchHistory.count else { return }
let queryID = manager.searchHistory[newIndex].id
if let state = viewStates[queryID] {
manager.posts = state.posts
manager.currentPage = state.currentPage
} else {
manager.posts = []
manager.currentPage = 1
Task(priority: .userInitiated) {
await manager.fetchPosts(
page: 1,
tags: manager.searchHistory[newIndex].tags,
replace: true
)
}
}
}
.toolbar {
#if os(macOS)
ToolbarItem {
Button(action: {
Task {
await manager.fetchPosts(page: 1, tags: manager.tags, replace: true)
}
}) {
Label("Refresh", systemImage: "arrow.clockwise")
}
.disabled(manager.isLoading)
}
#endif
#if !os(macOS)
PlatformSpecificToolbarItem {
Button(action: { Task { isSearchHistoryPresented.toggle() } }) {
Label("Search History", systemImage: "clock.arrow.circlepath")
}
}
if #available(iOS 26, *), manager.isLoading || manager.isNavigatingHistory {
ToolbarItem(placement: .status) { ProgressView() }
}
#endif
PlatformSpecificToolbarItem {
PostGridBookmarkButtonView()
.disabled(manager.tags.isEmpty)
}
PlatformSpecificToolbarItem {
Button(
action: {
Task(priority: .userInitiated) {
await manager.loadNextPage()
}
}
) {
Label(
"Manually Load Next Page",
systemImage: "arrow.down.to.line"
)
}
.disabled(manager.isLoading || manager.endOfData)
}
#if !os(macOS)
if #unavailable(iOS 26), manager.isLoading || manager.isNavigatingHistory {
ToolbarItem(placement: .topBarTrailing) { ProgressView() }
}
#endif
PlatformSpecificToolbarItem(placement: .navigation) {
Button(action: { manager.goBackInHistory() }) {
Label("Previous Search", systemImage: "chevron.left")
}
.disabled(!manager.canGoBackInHistory)
}
PlatformSpecificToolbarItem(placement: .navigation) {
Button(action: { manager.goForwardInHistory() }) {
Label("Next Search", systemImage: "chevron.right")
}
.disabled(!manager.canGoForwardInHistory)
}
}
.navigationTitle("Posts")
.refreshable {
manager.clearCachedPages()
Task(priority: .userInitiated) {
await manager.fetchPosts(page: 1, tags: manager.tags, replace: true)
}
}
.sheet(isPresented: $isSearchHistoryPresented) {
PostGridSearchHistoryView(
selectedTab: $selectedTab,
isPresented: $isSearchHistoryPresented
)
}
#if os(iOS)
.gesture(
DragGesture()
.onEnded { value in
if value.startLocation.x < 50 && value.translation.width > 100 {
manager.goBackInHistory()
debugPrint("ContentView: Swipe left, \(manager.searchHistory)")
}
if value.startLocation.x > (UIScreen.main.bounds.width - 50)
&& value.translation.width < -100
{
manager.goForwardInHistory()
debugPrint("ContentView: Swipe right, \(manager.searchHistory)")
}
}
)
#endif
}
}
private func waterfallGridContent(post: BooruPost) -> some View {
Button {
if !manager.isLoading { manager.selectedPost = post }
} label: {
PostGridThumbnailView(post: post, posts: filteredPosts)
}
.buttonStyle(PlainButtonStyle())
.contextMenu {
Button(action: { manager.selectedPost = post }) {
Label("Select Post", systemImage: "arrow.right.circle")
}
}
}
private func searchSuggestionsItems() -> [Either<BooruTag, BooruSearchQuery>] {
switch settings.searchSuggestionsMode {
case .tags:
return cachedSuggestions
case .history:
return settings.searchHistory.map { .right($0) }
case .disabled:
return []
}
}
private func updateViewState(
for queryID: UUID,
posts: [BooruPost] = [],
currentPage: Int? = nil
) {
var state = viewStates[queryID] ?? PostGridViewState()
if !posts.isEmpty { state.posts = posts }
if let currentPage { state.currentPage = currentPage }
viewStates[queryID] = state
}
}
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