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PostListFilteredView.swift
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PostListFilteredView.swift
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import SwiftUI
struct PostListFilteredView: View {
@EnvironmentObject var model: WriteFreelyModel
var fetchRequest: FetchRequest<WFAPost>
init(filter: String?, showAllPosts: Bool) {
if showAllPosts {
fetchRequest = FetchRequest<WFAPost>(
entity: WFAPost.entity(),
sortDescriptors: [NSSortDescriptor(key: "createdDate", ascending: false)]
)
} else {
if let filter = filter {
fetchRequest = FetchRequest<WFAPost>(
entity: WFAPost.entity(),
sortDescriptors: [NSSortDescriptor(key: "createdDate", ascending: false)],
predicate: NSPredicate(format: "collectionAlias == %@", filter)
)
} else {
fetchRequest = FetchRequest<WFAPost>(
entity: WFAPost.entity(),
sortDescriptors: [NSSortDescriptor(key: "createdDate", ascending: false)],
predicate: NSPredicate(format: "collectionAlias == nil")
)
}
}
}
var body: some View {
#if os(iOS)
List {
ForEach(fetchRequest.wrappedValue, id: \.self) { post in
NavigationLink(
destination: PostEditorView(post: post),
tag: post,
selection: $model.selectedPost
) {
PostCellView(post: post)
}
.deleteDisabled(post.status != PostStatus.local.rawValue)
}
.onDelete(perform: { indexSet in
for index in indexSet {
let post = fetchRequest.wrappedValue[index]
delete(post)
}
})
}
#else
List {
ForEach(fetchRequest.wrappedValue, id: \.self) { post in
NavigationLink(
destination: PostEditorView(post: post),
tag: post,
selection: $model.selectedPost
) {
PostCellView(post: post)
}
.deleteDisabled(post.status != PostStatus.local.rawValue)
}
.onDelete(perform: { indexSet in
for index in indexSet {
let post = fetchRequest.wrappedValue[index]
delete(post)
}
})
}
.onDeleteCommand(perform: {
guard let selectedPost = model.selectedPost else { return }
if selectedPost.status == PostStatus.local.rawValue {
model.postToDelete = selectedPost
model.isPresentingDeleteAlert = true
}
})
#endif
}
func delete(_ post: WFAPost) {
model.posts.remove(post)
}
}
struct PostListFilteredView_Previews: PreviewProvider {
static var previews: some View {
return PostListFilteredView(filter: nil, showAllPosts: false)
}
}

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