<?php
namespace FluidTYPO3\Vhs\ViewHelpers;

/*
 * This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
 *
 * For the full copyright and license information, please read the
 * LICENSE.md file that was distributed with this source code.
 */

use TYPO3\CMS\Extbase\Utility\LocalizationUtility;
use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;

/**
 * If content is empty use alternative text (can also be LLL:labelname shortcut or LLL:EXT: file paths).
 *
 * @author Danilo Bürger <danilo.buerger@hmspl.de>, Heimspiel GmbH
 * @package Vhs
 * @subpackage ViewHelpers
 */
class OrViewHelper extends AbstractViewHelper {

	/**
	 * Initialize
	 *
	 * @return void
	 */
	public function initializeArguments() {
		$this->registerArgument('alternative', 'mixed', 'Alternative if content is empty, can use LLL: shortcut', FALSE);
		$this->registerArgument('arguments', 'array', 'Arguments to be replaced in the resulting string', FALSE, NULL);
		$this->registerArgument('extensionName', 'string', 'UpperCamelCase extension name without vendor prefix', FALSE, NULL);
	}

	/**
	 * @param $content string
	 * @return string
	 */
	public function render($content = NULL) {
		if (NULL === $content) {
			$content = $this->renderChildren();
		}
		if (TRUE === empty($content)) {
			$content = $this->getAlternativeValue();
		}
		return $content;
	}

	/**
	 * @return mixed
	 */
	protected function getAlternativeValue() {
		$alternative = $this->arguments['alternative'];
		$arguments = (array) $this->arguments['arguments'];
		if (0 === count($arguments)) {
			$arguments = NULL;
		}
		if (0 === strpos($alternative, 'LLL:EXT:')) {
			$alternative = LocalizationUtility::translate($alternative, NULL, $arguments);
		} elseif (0 === strpos($alternative, 'LLL:')) {
			$extensionName = $this->arguments['extensionName'];
			if (NULL === $extensionName) {
				$extensionName = $this->controllerContext->getRequest()->getControllerExtensionName();
			}
			$translatedAlternative = LocalizationUtility::translate(substr($alternative, 4), $extensionName, $arguments);
			if (NULL !== $translatedAlternative) {
				$alternative = $translatedAlternative;
			}
		}
		return NULL !== $arguments && FALSE === empty($alternative) ? vsprintf($alternative, $arguments) : $alternative;
	}

}