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import SwiftUI
struct PostDetailsCarouselView: View {
@EnvironmentObject var manager: BooruManager
@EnvironmentObject var settings: SettingsManager
let posts: [BooruPost]
let focusedPost: BooruPost?
@Binding var loadingStage: BooruPostLoadingState
@State private var currentIndex: Int
init(
posts: [BooruPost],
loadingStage: Binding<BooruPostLoadingState>,
focusedPost: BooruPost? = nil
) {
self.posts = posts
self.focusedPost = focusedPost
_loadingStage = loadingStage
if let focused = focusedPost,
let index = posts.firstIndex(where: { $0.id == focused.id })
{
self._currentIndex = State(initialValue: index)
} else {
self._currentIndex = State(initialValue: 0)
}
}
func imageURL(post: BooruPost) -> URL? {
switch settings.detailViewQuality {
case .preview:
post.previewURL
case .sample:
post.sampleURL
case .original:
post.fileURL
}
}
var body: some View {
TabView(selection: $currentIndex) {
ForEach(posts.indices, id: \.self) { index in
ZStack {
PostDetailsImageView(
url: posts[index].previewURL,
loadingStage: $loadingStage
)
.opacity(loadingStage == .loaded ? 0 : 1)
PostDetailsImageView(
url: imageURL(post: posts[index]),
loadingStage: $loadingStage,
finalLoadingState: .loaded,
post: posts[index]
)
}
.tag(index)
}
}
.onChange(of: currentIndex) {
if currentIndex == posts.count - 1 { manager.loadNextPage() }
}
#if !os(macOS)
.tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
#endif
}
}
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