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fix: Prevent UICollectionView crash from concurrent bookmark list updates

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Add isUpdating flag to prevent race conditions when updating the bookmark list.
This fixes crashes that occurred when returning to the app after adding a bookmark
via the share extension while the list was being updated.
This commit is contained in:
Ilyas Hallak 2025-10-19 20:40:02 +02:00
parent 6906509aea
commit d97e404cc7
1 changed files with 17 additions and 8 deletions
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25
readeck/UI/Bookmarks/BookmarksViewModel.swift
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@ -22,9 +22,12 @@ class BookmarksViewModel {
var showingAddBookmarkFromShare = false
var shareURL = ""
var shareTitle = ""
// Undo delete functionality
var pendingDeletes: [String: PendingDelete] = [:] // bookmarkId -> PendingDelete
// Prevent concurrent updates
private var isUpdating = false
private var cancellables = Set<AnyCancellable>()
@ -104,15 +107,19 @@ class BookmarksViewModel {
@MainActor
func loadBookmarks(state: BookmarkState = .unread, type: [BookmarkType] = [.article], tag: String? = nil) async {
guard !isUpdating else { return }
isUpdating = true
defer { isUpdating = false }
isLoading = true
errorMessage = nil
currentState = state
currentType = type
currentTag = tag
offset = 0
hasMoreData = true
do {
let newBookmarks = try await getBooksmarksUseCase.execute(
state: state,
@ -142,18 +149,20 @@ class BookmarksViewModel {
}
// Don't clear bookmarks on error - keep existing data visible
}
isLoading = false
isInitialLoading = false
}
@MainActor
func loadMoreBookmarks() async {
guard !isLoading && hasMoreData else { return } // prevent multiple loads
guard !isLoading && hasMoreData && !isUpdating else { return } // prevent multiple loads
isUpdating = true
defer { isUpdating = false }
isLoading = true
errorMessage = nil
do {
offset += limit // inc. offset
let newBookmarks = try await getBooksmarksUseCase.execute(
@ -181,7 +190,7 @@ class BookmarksViewModel {
errorMessage = "Error loading more bookmarks"
}
}
isLoading = false
}