Function getOptimisticBookmarkCount

packages/shared/src/hooks/useBookmarkPost.ts:76–82

(
  currentBookmarks: number | null | undefined,
  isCurrentlyBookmarked: boolean | null | undefined,
)

};

const getOptimisticBookmarkCount = (
  currentBookmarks: number | null | undefined,
  isCurrentlyBookmarked: boolean | null | undefined,
): number => {
  const delta = isCurrentlyBookmarked ? -1 : 1;
  return Math.max(0, (currentBookmarks ?? 0) + delta);
};

export type UseBookmarkPost = {
  toggleBookmark: (props: ToggleBookmarkProps) => Promise<void>;