Taming TYPO3 4.6's forms: Implementing a Webhook PostProcessor

tx_form_System_Postprocessor.php

// $this->typoScript[$key] is either 'mail' or 'webhook' in my example
$className = 'tx_form_System_Postprocessor_' . ucfirst(strtolower($this->typoScript[$key]));
if (class_exists($className, TRUE)) {
   $processor = t3lib_div::makeInstance($className, $this->form, $processorArguments);
   $html .= $processor->process();
}

tx_form_System_Postprocessor_Webhook.php

/**
 * The webhook post processor
 *
 * @author Pascal alich <pascal@alichs.de>
 * @package TYPO3
 * @subpackage form
 */
class tx_form_System_Postprocessor_Webhook {
	
	/**
	 * @var tx_form_Domain_Model_Form
	 */
	protected $form;

	/**
	 * @var array
	 */
	protected $typoScript;

	/**
	 * Constructor
	 *
	 * @param $form tx_form_Domain_Model_Form Form domain model
	 * @param $typoscript array Post processor TypoScript settings
	 * @return void
	 */
	public function __construct(tx_form_Domain_Model_Form $form, array $typoScript) {
		$this->form = $form;
		$this->typoScript = $typoScript;
	}

	/**
	 * The main method called by the post processor
	 *
	 * Configures the mail message
	 * @todo This current version is properly violating most Extbase rules.
	 * @return string HTML message from this processor
	 */
	public function process() {
		$params = array();
		$this->fillParams($params, $this->form->getElements());
				
		$ch = curl_init($this->typoScript['url']);
		curl_setopt($ch, CURLOPT_HEADER, 0);
		curl_setopt($ch, CURLOPT_USERAGENT, "TYPO3FormWebhook/1.0");
		curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, $params);

		$return = curl_exec($ch);
		curl_close($ch);
		return $return;
	}
	
	private function fillParams(&$params, &$elements) {
		foreach ($elements as $element) {
		   if (is_a($element, 'tx_form_Domain_Model_Element_Textline')) {
		        $params[$element->getName()] = $element->getAttributeValue('value');
		   } else if (is_a($element, 'tx_form_Domain_Model_Element_Select')) {
				$this->fillParamsFromSelect($params, $element);
		   } else if (is_a($element, 'tx_form_Domain_Model_Element_Textarea')) {
				$params[$element->getName()] = $element->getData();
		   } else if (is_a($element, 'tx_form_Domain_Model_Element_Container')) {
				$this->fillParams($params, $element->getElements());
		   }
		}
	}
	
	private function fillParamsFromSelect(&$params, &$select) {
		foreach ($select->getElements() as $option) {
			if ($option->hasAttribute('selected') && $option->getAttributeValue('selected')=='selected') {
				$params[$select->getName()] = $option->getData();
				break;
			}
		}
	}
}