Gsyfuy

How to add newsletter checkbox in contact us form in magento 2.1.6 same like customer create account page.

i tried to use same block

 <div class="field choice newsletter">

            <input type="checkbox" name="is_subscribed" title="<?php /* @escapeNotVerified */ echo __('Sign Up for Newsletter') ?>" value="1" id="is_subscribed"<?php if ($block->getFormData()->getIsSubscribed()): ?> checked="checked"<?php endif; ?> class="checkbox">

            <label for="is_subscribed" class="label"><span><?php /* @escapeNotVerified */ echo __('Sign Up for Newsletter') ?></span></label>

        </div>

but its give error:

Fatal error: Call to a member function getIsSubscribed() on null in /home/schoolin/public_html/demo/app/design/frontend/Sm/furnicom/Magento_Contact/templates/form.phtml on line 72

How to fix this ???

You will need to create a new module with a new helper for it to check if customer is subscribed in this situation.

app/code/Stackoverflow/Contact/Helper/Data.php

<?php

/**

 * Copyright © 2017 Toan Nguyen. All rights reserved.

 * See COPYING.txt for license details.

 */



namespace StackoverflowContactHelper;



use MagentoCustomerApiDataCustomerInterface;

use MagentoCustomerModelSession;

use MagentoFrameworkAppHelperAbstractHelper;

use MagentoFrameworkAppHelperContext;

use MagentoNewsletterModelSubscriber;



/**

 * Contact base helper

 */

class Data extends AbstractHelper

{

    /**

     * @var MagentoCustomerModelSession

     */

    protected $customerSession;



    /**

     * @var MagentoNewsletterModelSubscriber

     */

    protected $subscriber;



    /**

     * @param Context            $context

     * @param Session            $customerSession

     * @param Subscriber         $subscriber

     */

    public function __construct(

        Context $context,

        Session $customerSession,

        Subscriber $subscriber

    ) {

        $this->customerSession = $customerSession;

        $this->subscriber = $subscriber;

        parent::__construct($context);

    }



    /**

     * Check if customer subsribed

     *

     * @return bool

     */

    public function isSubscribed()

    {

        if (!$this->customerSession->isLoggedIn()) {

            return false;

        }



        /**

         * @var CustomerInterface $customer

         */

        $customer = $this->customerSession->getCustomer();

        $checkSubscriber = $this->subscriber->loadByEmail($customer->getEmail());



        return $checkSubscriber->isSubscribed();

    }

}

app/design/frontend/YOURVENDOR/YOURTHEME/Magento_Contact/templates/form.phtml

    <div class="field choice newsletter">

        <input type="checkbox" name="is_subscribed" title="<?php /* @escapeNotVerified */ echo __('Sign Up for Newsletter') ?>" value="1" id="is_subscribed"<?php if ($this->helper('StackoverflowContactHelperData')->isSubscribed()): ?> checked="checked"<?php endif; ?> class="checkbox">

        <label for="is_subscribed" class="label"><span><?php /* @escapeNotVerified */ echo __('Sign Up for Newsletter') ?></span></label>

    </div>

app/code/Stackoverflow/Contact/Plugin/Controller/Index/Post.php

<?php

/**

 * Copyright © 2017 Toan Nguyen. All rights reserved.

 * See COPYING.txt for license details.

 */



namespace StackoverflowContactPluginControllerIndex;



use MagentoContactControllerIndexPost as Subject;

use MagentoCustomerModelSession;

use MagentoNewsletterModelSubscriberFactory;



class Post

{

    /**

     * @var SubscriberFactory

     */

    protected $subscriberFactory;



    /**

     * @var Session

     */

    protected $customerSession;



    /**

     * Post constructor.

     *

     * @param SubscriberFactory $subscriberFactory

     * @param Session           $customerSession

     */

    public function __construct(

        SubscriberFactory $subscriberFactory,

        Session $customerSession

    ) {

        $this->subscriberFactory = $subscriberFactory;

        $this->customerSession = $customerSession;

    }





    /**

     * Override execute() to subscribe customer before send email

     *

     * @param Subject  $subject

     * @param Closure $proceed

     *

     * @return mixed

     */

    public function aroundExecute(Subject $subject, Closure $proceed)

    {

        if ($subject->getRequest()->isPost()) {

            $post = $subject->getRequest()->getPostValue();

            if ((boolean)$subject->getRequest()->getParam('is_subscribed') === true) {

                $this->subscriberFactory->create()->subscribe($post['email']);

            }

        }

        return $proceed();

    }

}

app/code/Stackoverflow/Contact/etc/frontend/di.xml

<type name="MagentoContactControllerIndexPost">

    <plugin sortOrder="1" name="stackoverflowContactPost"

            type="StackoverflowContactPluginControllerIndexPost"/>

</type>