add counter for omitted replies and links in replies

src/hooks/use-count-links-in-replies.ts

@@ -0,0 +1,20 @@
+import { useMemo } from 'react';
+import { Comment } from '@plebbit/plebbit-react-hooks';
+import { flattenCommentsPages } from '@plebbit/plebbit-react-hooks/dist/lib/utils';
+
+const useCountLinksInReplies = (comment: Comment, firstXReplies?: number) => {
+  let linkCount = 0;
+  const flattenedReplies = useMemo(() => flattenCommentsPages(comment.replies), [comment.replies]);
+
+  const repliesToConsider = firstXReplies !== undefined ? flattenedReplies.slice(0, firstXReplies) : flattenedReplies;
+
+  for (let reply of repliesToConsider) {
+    if (reply.link) {
+      linkCount++;
+    }
+  }
+
+  return linkCount;
+};
+
+export default useCountLinksInReplies;