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Created: Fri, Jul 4, 1:13 AM

ajax_form_helper.php
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	<?php

	class AjaxFormHelper extends kHelper {

	/**
	* Sets error info as parameters in response object
	* Expects that event status is not erSUCCESS
	*
	* @param kEvent $event
	* @param Array $response
	*/
	public function prepareJSONErrors($event, &$response)
	{
	$object = $event->getObject();
	/* @var $object kDBItem */

	$response['status'] = 'FAILED';
	$response['field_errors'] = $this->getErrorMessages($object);
	}

	/**
	* Returns object errors
	*
	* @param kDBItem $object
	* @return Array
	*/
	public function getErrorMessages(&$object)
	{
	$error_msgs = Array ();
	$field_errors = array_keys( $object->GetFieldErrors() );

	foreach ($field_errors as $field) {
	if ( !$object->GetErrorPseudo($field) ) {
	continue;
	}

	if ( $object->GetFieldOption($field, 'formatter') == 'kMultiLanguage') {
	$field = 'l' . $this->Application->GetVar('m_lang') . '_' . $field;
	}

	$error_field = $object->GetFieldOption($field, 'error_field', false, $field);
	$error_msgs[$field] = $object->GetErrorMsg($error_field);
	}

	return $error_msgs;
	}

	/**
	* Sends JSON-encoded response as event result to the browser
	*
	* @param kEvent $event
	* @param Array $response
	*/
	public function sendResponse($event, $response = Array ())
	{
	if ( !isset($response['status']) ) {
	$response['status'] = 'OK';
	}

	$json_helper = $this->Application->recallObject('JSONHelper');
	/* @var $json_helper JSONHelper */

	echo $json_helper->encode($response);

	$event->status = kEvent::erSTOP;
	}

	/**
	* Calls given event and returns nice JSON output
	*
	* @param kEvent $event
	* @param string $call_event
	* @param Array $params
	*/
	public function transitEvent($event, $call_event, $params = Array ())
	{
	$params['status'] = 'OK';
	$event->CallSubEvent($call_event);

	if ( $event->status != kEvent::erSUCCESS ) {
	$this->prepareJSONErrors($event, $params);
	}
	else {
	if ( !isset($params['redirect_to']) && ($event->redirect === true \|\| strlen($event->redirect) > 0) ) {
	$params['redirect_to'] = $this->Application->HREF($event->redirect, '', $event->getRedirectParams(), $event->redirectScript);
	}

	$params = array_merge($params, $event->getRedirectParams());
	}

	$this->sendResponse($event, $params);
	}
	}

ajax_form_helper.php
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