class.tx_coreupdates_t3skin.php

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<?php
/***************************************************************
*  Copyright notice
*
*  (c) 2010-2011  Steffen Ritter (info@rs-websystems.de)
*  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!
***************************************************************/
/**
 * Contains the update class for not installed t3skin. Used by the update wizard in the install tool.
 *
 * @author  Steffen Ritter <info@rs-websystems.de>
 */
class tx_coreupdates_t3skin extends Tx_Install_Updates_Base {
    protected $title = 'Install the new TYPO3 Skin "t3skin"';


    /**
     * Checks if t3skin is not installed.
     *
     * @param   string      &$description: The description for the update
     * @return  boolean     whether an update is needed (true) or not (false)
     */
    public function checkForUpdate(&$description) {
        $result = FALSE;
        $description = '<strong>The backend skin "t3skin" is not loaded.</strong>
        TYPO3 4.4 introduced many changes in backend skinning and old backend skins are now incompatible.
        <strong>Without "t3skin" the backend may be unusable.</strong> Install extension "t3skin".';
        if (!t3lib_extMgm::isLoaded('t3skin')) {
            $result = TRUE;
        }
        return $result;
    }

    /**
     * second step: get user info
     *
     * @param   string      input prefix, all names of form fields have to start with this. Append custom name in [ ... ]
     * @return  string      HTML output
     */
    public function getUserInput($inputPrefix) {
        $content = '<strong>Install the system extension</strong><br />You are about to install the extension "t3skin".';

        return $content;
    }

    /**
     * performs the action of the UpdateManager
     *
     * @param   array       &$dbQueries: queries done in this update
     * @param   mixed       &$customMessages: custom messages
     * @return  bool        whether everything went smoothly or not
     */
    public function performUpdate(array &$dbQueries, &$customMessages) {
        $result = FALSE;
        if ($this->versionNumber >= 4004000 && !t3lib_extMgm::isLoaded('t3skin')) {
            // check wether the table can be truncated or if sysext with tca has to be installed
            if ($this->checkForUpdate($customMessages[])) {
                $extList = $this->addExtToList(array('t3skin'));
                if ($extList) {
                    $message = $this->writeNewExtensionList($extList);
                }

                if ($message == 'continue') {
                    $customMessages = 'The system extension "t3skin" was succesfully loaded.';
                    $result = TRUE;
                }
                }
            }
        return $result;
    }

    /**
     * Adds extension to extension list and returns new list. If -1 is returned, an error happend.
     * Does NOT check dependencies yet.
     *
     * @param   array       Extension keys to add
     * @return  string      New list of installed extensions or -1 if error
     */
    protected function addExtToList(array $extKeys) {
            // Get list of installed extensions and add this one.
        $tmpLoadedExt = $GLOBALS['TYPO3_LOADED_EXT'];
        if (isset($tmpLoadedExt['_CACHEFILE'])) {
            unset($tmpLoadedExt['_CACHEFILE']);
        }

        $listArr = array_keys($tmpLoadedExt);
        $listArr = array_merge($listArr, $extKeys);

            // Implode unique list of extensions to load and return:
        return implode(',', array_unique($listArr));
        }


    /**
     * Writes the extension list to "localconf.php" file
     * Removes the temp_CACHED* files before return.
     *
     * @param   string      List of extensions
     * @return  string      Result of writeToLocalconf_control()
     */
    protected function writeNewExtensionList($newExtList)   {
            // Instance of install tool
        $instObj = new t3lib_install;
        $instObj->allowUpdateLocalConf = 1;
        $instObj->updateIdentity = 'TYPO3 Core Update Manager';

            // Get lines from localconf file
        $lines = $instObj->writeToLocalconf_control();
        $instObj->setValueInLocalconfFile($lines, '$TYPO3_CONF_VARS[\'EXT\'][\'extList\']', $newExtList);
        $result = $instObj->writeToLocalconf_control($lines);

        $GLOBALS['TYPO3_CONF_VARS']['EXT']['extList'] = $newExtList;
        t3lib_extMgm::removeCacheFiles();

        return $result;
    }
}
?>