<?php
namespace TYPO3\CMS\Belog\ViewHelpers\Form;

/***************************************************************
 *  Copyright notice
 *
 *  (c) 2012 Christian Kuhn <lolli@schwarzbu.ch>
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project is
 *  free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  The GNU General Public License can be found at
 *  http://www.gnu.org/copyleft/gpl.html.
 *  A copy is found in the textfile GPL.txt and important notices to the license
 *  from the author is found in LICENSE.txt distributed with these scripts.
 *
 *  This script is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/

/**
 * Extends the usual select view helper, but additionally translates
 * the select option labels
 *
 * Example:
 * <belog:form.translateLabelSelect property="number" options="{settings.selectableNumberOfLogEntries}" optionLabelPrefix="numbers"
 *
 * Will lookup number.200 (or whatever optionValue is given) in locallang database
 *
 * @author Christian Kuhn <lolli@schwarzbu.ch>
 */
class TranslateLabelSelectViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\Form\SelectViewHelper {

	/**
	 * Initialize arguments.
	 *
	 * @return void
	 * @api
	 */
	public function initializeArguments() {
		parent::initializeArguments();
		$this->registerArgument('optionLabelPrefix', 'string', 'Prefix for locallang lookup');
	}

	/**
	 * Render the option tags.
	 *
	 * Extend the default handling by iterating over calculated options array and
	 * try to translate the value
	 *
	 * @return array An associative array of options, key will be the value of the option tag
	 */
	protected function getOptions() {
		$options = parent::getOptions();
		foreach ($options as $value => $label) {
			$options[$value] = $this->translateLabel($label);
		}
		return $options;
	}

	/**
	 * Fetches the translation for a given label. If no translation is found, the label is returned unchanged.
	 *
	 * @param string $label The label to translate
	 * @return string
	 */
	protected function translateLabel($label) {
		if ($label === '') {
			return '';
		}
		$labelKey = $this->hasArgument('optionLabelPrefix') ? $this->arguments['optionLabelPrefix'] . $label : $label;
		$translatedLabel = \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate($labelKey, $this->controllerContext->getRequest()->getControllerExtensionName());
		return $translatedLabel ? $translatedLabel : $label;
	}

}

?>