Custom Submission Functionality

Let's create observer function for WebForms that dumps submitted result into XML file.

We will be creating new extension called MageMe_WebFormsProcessResult.

File structure

app/code/MageMe/WebFormsProcessResult
├── etc
│   ├── events.xml
│   └── module.xml   
├── Observer
│   └── WebformsResultSaveObserver.php
├── composer.json
└── registration.php

composer.json

This file holds information for composer script

{
  "name": "mage-me/web-forms-process-result",
  "version": "1.0.0",
  "description": "N/A",
  "type": "magento2-module",
  "require": {
    "magento/framework": "*",
    "mageme/module-webforms": "3.0.*"
  },
  "license": [
    "Proprietary"
  ],
  "autoload": {
    "files": [
      "registration.php"
    ],
    "psr-4": {
      "MageMe\\WebFormsProcessResult\\": ""
    }
  }
}

registration.php

This file registers module in the Magento system. The module is not visible without it.

<?php

use Magento\Framework\Component\ComponentRegistrar;

ComponentRegistrar::register(ComponentRegistrar::MODULE, 'MageMe_WebFormsProcessResult', __DIR__);

etc/module.xml

This file holds basic description of our module. We need to set the sequence so that the module is loaded after the main WebForms extension.

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="MageMe_WebFormsProcessResult">
        <sequence>
            <module name="MageMe_WebForms"/>
        </sequence>
    </module>
</config>

etc/events.xml

This file registers our event handler function.

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="webforms_result_save">
        <observer name="mageme_webformsprocessresult_webforms_result_save"
                  instance="MageMe\WebFormsProcessResult\Observer\WebformsResultSaveObserver" />
    </event>
</config>

Observer/WebformsResultSaveObserver.php

Here we define our model of the event observer class. It has some basic members to work with stores, system messages and logging.

<?php

namespace MageMe\WebFormsProcessResult\Observer;

use MageMe\WebForms\Model;
use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\Message\ManagerInterface;
use Magento\Framework\Simplexml\Element;
use Magento\Store\Model\StoreManager;
use Psr\Log\LoggerInterface;

class WebformsResultSaveObserver implements ObserverInterface
{
    /** @var StoreManager */
    protected $_storeManager;

    /** @var LoggerInterface */
    protected $logger;

    /**
     * @var ManagerInterface
     */
    protected $messageManager;

    public function __construct(
        StoreManager $storeManager,
        ManagerInterface $messageManager,
        LoggerInterface $logger
    )
    {
        $this->_storeManager  = $storeManager;
        $this->messageManager = $messageManager;
        $this->logger         = $logger;
    }

    /**
     * @param Observer $observer
     * @return $this
     */
    public function execute(Observer $observer)
    {
        /** @var Model\Result $result */
        $result = $observer->getResult();

        /** @var Model\Form $webform */
        $webform = $result->getForm();

        /*
        *   Check web-form code
        */
        if($webform->getCode() != 'myform') return $this;

        $xmlObject = new Element($result->toXml());

        // generate unique filename
        $mediaFolder       = $this->_storeManager->getStore($result->getStoreId())->getBaseMediaDir();
        $destinationFolder = $mediaFolder . '/' . 'webforms' . '/' . 'xml';
        $filename          = $destinationFolder . '/' . $result->getId() . '.xml';

        // create folder
        if (!(@is_dir($destinationFolder) || @mkdir($destinationFolder, 0755, true))) {
            $this->messageManager->addErrorMessage("Unable to create directory '{$destinationFolder}'.");
        } else {

            // export to file
            $xmlObject->asNiceXml($filename);
        }
        return $this;
    }
}

$destinationFolder - variable that sets folder where result is being stored. We will be creating files in pub/media/webforms/xml folder.

$filename - is complete path to the file. For example pub/media/webforms/xml/123.xml.

note

Make sure pub/media folder is writable.

After the module is ready, please run following console commands:

php bin/magento module:enable MageMe_WebFormsProcessResult
php bin/magento setup:upgrade

Thats it! Feel free to modify this extension, experiment and add required post processing functionality to WebForms.

You can download sources here.