Send JSON response from Magento\Wishlist\Controller\Index\Add controller in Magento 2.2.2

Question

I am trying to override Magento\Wishlist\Controller\Index\Add controller's execute() method to return a JSON response.

I have created a after plugin for it.

Vendor\Company\etc\frontend\di.xml:

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
  <type name="Magento\Wishlist\Controller\Index\Add">
    <plugin name="vendorCompanyExtension" type="Vendor\Company\Plugin\Index\Add" sortOrder="10" disabled="false"/>
  </type>
</config>

Vendor\Company\Plugin\Index\Add.php:

<?php

namespace Vendor\Company\Plugin\Index;

class Add 
{
    /**
     * @var \Magento\Framework\Json\Helper\Data
     */
    protected $_jsonHelper;

    public function __construct(
        \Magento\Framework\Json\Helper\Data $jsonHelper
    ) {
        $this->_jsonHelper = $jsonHelper;
    }

    public function afterExecute(\Magento\Wishlist\Controller\Index\Add $subject, $result) 
    {

        $newResult = [];

        $newResult["message"] = "Hello";

        $subject->getResponse()->representJson(
            $this->_jsonHelper->jsonEncode($newResult)
        );

        return $result;

    }
}

In the original Magento\Wishlist\Controller\Index\Add.php, there is a code:

$resultRedirect->setPath('*', ['wishlist_id' => $wishlist->getId()]);
        return $resultRedirect;

I am trying to return a JSON response instead of redirecting to a Wishlist page after a product is added to the wishlist.

Any help would be appreciated.

Answer 1

Try this:

class Add
{
    /** @var \Magento\Framework\Controller\Result\JsonFactory */
    protected $_jsonFactory;

    /**
     * @param \Magento\Framework\Controller\Result\JsonFactory $jsonFactory
     */
    public function __construct(
        \Magento\Framework\Controller\Result\JsonFactory $jsonFactory
    ) {
        $this->_jsonFactory = $jsonFactory;
    }

    /**
     * @param \Magento\Wishlist\Controller\Index\Add $subject
     * @param \Magento\Framework\Controller\Result\Redirect $result
     * @return \Magento\Framework\Controller\Result\Json
     */
    public function afterExecute(
        \Magento\Wishlist\Controller\Index\Add $subject,
        \Magento\Framework\Controller\Result\Redirect $result
    ) {
        return $this->_jsonFactory->create()->setData(['message' => 'Hello']);
    }
}