Add topic extension

src/lib/tiptap/util.ts

@@ -0,0 +1,22 @@
+import type {JSONContent, PasteRuleMatch} from '@tiptap/core'
+
+export const createPasteRuleMatch = <T extends Record<string, unknown>>(
+  match: RegExpMatchArray,
+  data: T,
+): PasteRuleMatch => ({ index: match.index!, replaceWith: match[2], text: match[0], match, data })
+
+export const findNodes = (json: JSONContent, type: string) => {
+  const results: JSONContent[] = []
+
+  for (const node of json.content || []) {
+    if (node.type === type) {
+      results.push(node)
+    }
+
+    for (const result of findNodes(node, type)) {
+      results.push(result)
+    }
+  }
+
+  return results
+}