chore: Move editor into codebase (#2930)

shared/editor/queries/isNodeActive.ts

@@ -0,0 +1,23 @@
+import { NodeType } from "prosemirror-model";
+import { EditorState } from "prosemirror-state";
+import { findParentNode, findSelectedNodeOfType } from "prosemirror-utils";
+
+const isNodeActive = (type: NodeType, attrs: Record<string, any> = {}) => (
+  state: EditorState
+) => {
+  if (!type) {
+    return false;
+  }
+
+  const node =
+    findSelectedNodeOfType(type)(state.selection) ||
+    findParentNode((node) => node.type === type)(state.selection);
+
+  if (!Object.keys(attrs).length || !node) {
+    return !!node;
+  }
+
+  return node.node.hasMarkup(type, { ...node.node.attrs, ...attrs });
+};
+
+export default isNodeActive;