How to disable the "Save" button in a custom document action when there are errors in the input fields.

import { useState, useEffect } from "react";
import { useDocumentOperation } from "@sanity/react-hooks";
export function SetAndSaveAction(props) {
  const { patch, publish } = useDocumentOperation(props.id, props.type);
  const [isPublishing, setIsPublishing] = useState(false);

  useEffect(() => {
    // if the isPublishing state was set to true and the draft has changed
    // to become `null` the document has been published
    if (isPublishing && !props.draft) {
      setIsPublishing(false);
    }
  }, [props.draft]);

  return {
    disabled: publish.disabled,
    label: isPublishing ? "Saving..." : "Save",
    onHandle: () => {
      // This will update the button text
      setIsPublishing(true);

      // Set publishedAt to current date and time
      patch.execute([{ set: { publishedAt: new Date().toISOString() } }]);

      // Perform the publish
      publish.execute();

      props.onComplete();
    },
  };
}

{
            name: "internalLink",
            type: "object",
            title: "Internal Link",
            fields: [
              {
                name: "pageReference",
                type: "reference",
                validation: (Rule) =>
                  Rule.required().warning("Missing Internal Link"),
                to: [{ type: "page" }],
              },
            ],
          },

import { useState, useEffect } from "react";
import { useDocumentOperation, useValidationStatus } from "@sanity/react-hooks";
export function SetAndSaveAction(props) {
  const { patch, publish } = useDocumentOperation(props.id, props.type);
  const { markers } = useValidationStatus(props.id, props.type);
  const [isPublishing, setIsPublishing] = useState(false);

  useEffect(() => {
    // if the isPublishing state was set to true and the draft has changed
    // to become `null` the document has been published
    if (isPublishing && !props.draft) {
      setIsPublishing(false);
    }
  }, [props.draft]);

  return {
    disabled: markers.length ? true : publish.disabled,
    label: isPublishing ? "Saving..." : "Save",
    onHandle: () => {
      // This will update the button text
      setIsPublishing(true);

      // Set publishedAt to current date and time
      patch.execute([{ set: { publishedAt: new Date().toISOString() } }]);

      // Perform the publish
      publish.execute();

      // Signal that the action is completed
      props.onComplete();
    },
  };
}