Magento 2 – Override Method to Print PDF Invoice

controllersmagento-2.1magento2overrides

In Magento 2.1 I want to do a custom action when the admin click on button "Print" in Invoice page. In particular I want to show a pdf saved in a specific folder.

I thought that I have to override the controller PrintAction but it doesn't work.

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">
    <preference for="Magento\Sales\Controller\Adminhtml\Invoice\AbstractInvoice\PrintAction"
                type="VendorName\ModuleName\Controller\Sales\Adminhtml\Invoice\AbstractInvoice\PrintAction"/>
</config>

controller override:

<?php
namespace VendorName\ModuleName\Controller\Sales\Adminhtml\Invoice\AbstractInvoice;

abstract class PrintAction extends \Magento\Sales\Controller\Adminhtml\Invoice\AbstractInvoice\PrintAction
{
    public function execute($coreRoute = null)
    {
        // My action
    }
}

But when I click on Print button, it does the core action and not my action.
Is right? Or what method do I have to override?

Update 1

I solved overriding the method getPdf of the class Magento\Sales\Model\Order\Pdf\Invoice. In the implemented method I loaded my pdf using:

$pdf = new \Zend_Pdf ($pdfPath, null, true);
return $pdf;

Update 2

Finally I decided to override the execute() method in

\Magento\Sales\Controller\Adminhtml\Order\Invoice\PrintAction

Because of I don't have to modify the PDF during the creation but I have to load a PDF stored in a folder, it's the better way.

Best Answer

Seem that we cannot override the abstract class methods if the abstract class doesn't get instantiated.
Search through the Magento source, I saw two classes which extend abstract class Magento\Sales\Controller\Adminhtml\Invoice\AbstractInvoice\PrintAction:

\Magento\Sales\Controller\Adminhtml\Invoice\PrintAction and \Magento\Sales\Controller\Adminhtml\Order\Invoice\PrintAction. I think we need to override two classes.

Currently, I cannot find a way with Plugin.

Related Solutions

Magento2 Module – Fix ‘main.CRITICAL: Plugin Class Doesn’t Exist’

I couldn't reproduce your error, but I got an other one.

Then I did some minor adjustments to your code and it worked.
First drop the InstallSchema.php file. It does nothing so it is useless.

Then make sure that your plugin file is in Amaj/CorePlugin/Model/Currency/Plugin.php and it looks like this:

<?php

namespace Amaj\CorePlugin\Model\Currency;

class Plugin
{
    protected $logger;

    public function __construct(\Psr\Log\LoggerInterface $logger) {
        $this->logger = $logger;
    }

    /**
     * @param $subject
     * @param \Closure $proceed
     * @param $price
     * @param array $options
     * @return string
     */
    public function aroundFormatTxt(
        $subject,
        \Closure $proceed,
        $price,
        $options = []
    )
    {
        $this->logger->info('Amaj aroundFormatTxt');
        return '2';
    }

}

you don't need parent::__construct(); in the constructor because there is no parent class.
And I replaced $logger->info with $this->logger->info because there is no $logger variable.

Magento 2 – How to Override Contact Us Post Action Using Plugin

Try following code:


namespace Pos\Contact\Plugin;


class Post
{
    /**
     * @var \Magento\Framework\Controller\Result\RedirectFactory
     */
    protected $resultRedirectFactory;

    /**
     * @var \Magento\Framework\Message\ManagerInterface
     */
    protected $messageManager;

    /**
     * @var \Magento\Framework\Translate\Inline\StateInterface
     */
    protected $inlineTranslation;

    /**
     * @var \Magento\Framework\Mail\Template\TransportBuilder
     */
    protected $transportBuilder;

    /**
     * Core store config
     *
     * @var \Magento\Framework\App\Config\ScopeConfigInterface
     */
    protected $scopeConfig;

    /**
     * Post constructor.
     * 
     * @param \Magento\Framework\Controller\Result\RedirectFactory $resultRedirectFactory
     * @param \Magento\Framework\Message\ManagerInterface $messageManager
     * @param \Magento\Framework\Translate\Inline\StateInterface $inlineTranslation
     * @param \Magento\Framework\Mail\Template\TransportBuilder $transportBuilder
     * @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
     */
    public function __construct(
        \Magento\Framework\Controller\Result\RedirectFactory $resultRedirectFactory,
        \Magento\Framework\Message\ManagerInterface $messageManager,
        \Magento\Framework\Translate\Inline\StateInterface $inlineTranslation,
        \Magento\Framework\Mail\Template\TransportBuilder $transportBuilder,
        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
    ) {
        $this->resultRedirectFactory = $resultRedirectFactory;
        $this->messageManager = $messageManager;
        $this->inlineTranslation = $inlineTranslation;
        $this->transportBuilder = $transportBuilder;
        $this->scopeConfig = $scopeConfig;
    }

    /**
     * @param \Magento\Contact\Controller\Index\Post $subject
     * @return $this|void
     */
    public function aroundExecute(
        \Magento\Contact\Controller\Index\Post $subject
    ) {

        $post = $subject->getRequest()->getPostValue();
        if (!$post) {
            return $this->resultRedirectFactory->create()->setPath('*/*/');
        }
        $this->inlineTranslation->suspend();
        try {
            $postObject = new \Magento\Framework\DataObject();
            $postObject->setData($post);

            $error = false;

            if (!\Zend_Validate::is(trim($post['name']), 'NotEmpty')) {
                $error = true;
            }
            if (!\Zend_Validate::is(trim($post['comment']), 'NotEmpty')) {
                $error = true;
            }
            if (!\Zend_Validate::is(trim($post['email']), 'EmailAddress')) {
                $error = true;
            }
            if (\Zend_Validate::is(trim($post['hideit']), 'NotEmpty')) {
                $error = true;
            }
            if ($error) {
                throw new \Exception();
            }

            $storeScope = \Magento\Store\Model\ScopeInterface::SCOPE_STORE;
            $transport = $this->transportBuilder
                ->setTemplateIdentifier($this->scopeConfig->getValue(\Magento\Contact\Controller\Index\Post::XML_PATH_EMAIL_TEMPLATE, $storeScope))
                ->setTemplateOptions(
                    [
                        'area' => \Magento\Framework\App\Area::AREA_FRONTEND,
                        'store' => \Magento\Store\Model\Store::DEFAULT_STORE_ID,
                    ]
                )
                ->setTemplateVars(['data' => $postObject])
                ->setFrom($this->scopeConfig->getValue(\Magento\Contact\Controller\Index\Post::XML_PATH_EMAIL_SENDER, $storeScope))
                ->addTo($this->scopeConfig->getValue(\Magento\Contact\Controller\Index\Post::XML_PATH_EMAIL_RECIPIENT, $storeScope))
                ->setReplyTo($post['email'])
                ->getTransport();

            $transport->sendMessage();
            $this->inlineTranslation->resume();
            $this->messageManager->addSuccess(
                __('Thanks for contacting us with your comments and questions. We\'ll respond to you very soon.')
            );
            return $this->resultRedirectFactory->create()->setPath('contact/index');
        } catch (\Exception $e) {
            $this->inlineTranslation->resume();
            $this->messageManager->addError(
                __('We can\'t process your request right now. Sorry, that\'s all we know.')
            );
            return $this->resultRedirectFactory->create()->setPath('contact/index');
        }
    }
}

Best Answer

Related Solutions

Magento2 Module – Fix ‘main.CRITICAL: Plugin Class Doesn’t Exist’

Magento 2 – How to Override Contact Us Post Action Using Plugin

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