<?php
namespace TYPO3\CMS\Fluid\ViewHelpers\Format;

/*                                                                        *
 * This script is part of the TYPO3 project - inspiring people to share!  *
 *                                                                        *
 * TYPO3 is free software; you can redistribute it and/or modify it under *
 * the terms of the GNU General Public License version 2 as published by  *
 * the Free Software Foundation.                                          *
 *                                                                        *
 * This script is distributed in the hope that it will be useful, but     *
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN-    *
 * TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General      *
 * Public License for more details.                                       *
 *                                                                        */
/**
 * Renders a string by passing it to a TYPO3 parseFunc.
 * You can either specify a path to the TypoScript setting or set the parseFunc options directly.
 * By default lib.parseFunc_RTE is used to parse the string.
 *
 * == Examples ==
 *
 * <code title="Default parameters">
 * <f:format.html>foo <b>bar</b>. Some <LINK 1>link</LINK>.</f:format.html>
 * </code>
 * <output>
 * <p class="bodytext">foo <b>bar</b>. Some <a href="index.php?id=1" >link</a>.</p>
 * (depending on your TYPO3 setup)
 * </output>
 *
 * <code title="Custom parseFunc">
 * <f:format.html parseFuncTSPath="lib.parseFunc">foo <b>bar</b>. Some <LINK 1>link</LINK>.</f:format.html>
 * </code>
 * <output>
 * foo <b>bar</b>. Some <a href="index.php?id=1" >link</a>.
 * </output>
 *
 * <code title="Inline notation">
 * {someText -> f:format.html(parseFuncTSPath: 'lib.parseFunc')}
 * </code>
 * <output>
 * foo <b>bar</b>. Some <a href="index.php?id=1" >link</a>.
 * </output>
 *
 * @see https://docs.typo3.org/typo3cms/TyposcriptReference/Functions/Parsefunc/
 */
class HtmlViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper {

	/**
	 * @var \TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer
	 */
	protected $contentObject;

	/**
	 * @var \TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController contains a backup of the current $GLOBALS['TSFE'] if used in BE mode
	 */
	protected $tsfeBackup;

	/**
	 * If the escaping interceptor should be disabled inside this ViewHelper, then set this value to FALSE.
	 * This is internal and NO part of the API. It is very likely to change.
	 *
	 * @var boolean
	 * @internal
	 */
	protected $escapingInterceptorEnabled = FALSE;

	/**
	 * @var \TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface
	 */
	protected $configurationManager;

	/**
	 * @param \TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface $configurationManager
	 * @return void
	 */
	public function injectConfigurationManager(\TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface $configurationManager) {
		$this->configurationManager = $configurationManager;
		$this->contentObject = $this->configurationManager->getContentObject();
	}

	/**
	 * @param string $parseFuncTSPath path to TypoScript parseFunc setup.
	 * @return string the parsed string.
	 */
	public function render($parseFuncTSPath = 'lib.parseFunc_RTE') {
		if (TYPO3_MODE === 'BE') {
			$this->simulateFrontendEnvironment();
		}
		$value = $this->renderChildren();
		$content = $this->contentObject->parseFunc($value, array(), '< ' . $parseFuncTSPath);
		if (TYPO3_MODE === 'BE') {
			$this->resetFrontendEnvironment();
		}
		return $content;
	}

	/**
	 * Copies the specified parseFunc configuration to $GLOBALS['TSFE']->tmpl->setup in Backend mode
	 * This somewhat hacky work around is currently needed because the parseFunc() function of \TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer relies on those variables to be set
	 *
	 * @return void
	 */
	protected function simulateFrontendEnvironment() {
		$this->tsfeBackup = isset($GLOBALS['TSFE']) ? $GLOBALS['TSFE'] : NULL;
		$GLOBALS['TSFE'] = new \stdClass();
		$GLOBALS['TSFE']->tmpl = new \stdClass();
		$GLOBALS['TSFE']->tmpl->setup = $this->configurationManager->getConfiguration(\TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface::CONFIGURATION_TYPE_FULL_TYPOSCRIPT);
	}

	/**
	 * Resets $GLOBALS['TSFE'] if it was previously changed by simulateFrontendEnvironment()
	 *
	 * @return void
	 * @see simulateFrontendEnvironment()
	 */
	protected function resetFrontendEnvironment() {
		$GLOBALS['TSFE'] = $this->tsfeBackup;
	}
}
