<?php

/**
 * This file is part of the Froxlor project.
 * Copyright (c) 2010 the Froxlor Team (see authors).
 *
 * For the full copyright and license information, please view the COPYING
 * file that was distributed with this source code. You can also view the
 * COPYING file online at http://files.froxlor.org/misc/COPYING.txt
 *
 * @copyright  (c) the authors
 * @author     Michael Kaufmann <mkaufmann@nutime.de>
 * @author     Froxlor team <team@froxlor.org> (2010-)
 * @license    GPLv2 http://files.froxlor.org/misc/COPYING.txt
 * @package    Cron
 *
 * @since      0.9.29
 *
 */

class ConfigIO {

	/**
	 * internal settings array
	 *
	 * @var array
	 */
	private $_settings = null;

	/**
	 * constructor gets the froxlor settings
	 * as array
	 */
	public function __construct(array $settings = null) {
		$this->_settings = $settings;
	}

	/**
	 * clean up former created configs, including (if enabled)
	 * awstats, fcgid, php-fpm and of course automatically created
	 * webserver vhost and diroption files
	 *
	 * @return null
	 */
	public function cleanUp() {
		// awstats files
		$this->_cleanAwstatsFiles();

		// fcgid files
		$this->_cleanFcgidFiles();

		// php-fpm files
		$this->_cleanFpmFiles();

		// clean webserver-configs
		$this->_cleanWebserverConfigs();

		// old htpasswd files
		$this->_cleanHtpasswdFiles();
	}

	/**
	 * remove webserver related configuration files before regeneration
	 *
	 * @return null
	 */
	private function _cleanWebserverConfigs() {

		// get directories
		$configdirs = array();
		$configdirs[] = makeCorrectDir($this->_getFile('system', 'apacheconf_vhost'));
		$configdirs[] = makeCorrectDir($this->_getFile('system', 'apacheconf_diroptions'));

		// file pattern
		$pattern = "/^([0-9]){2}_(froxlor|syscp)_(.+)\.conf$/";

		// check ALL the folders
		foreach ($configdirs as $config_dir) {

			// check directory
			if (@is_dir($config_dir)) {

				// create directory iterator
				$its = new RecursiveIteratorIterator(
						new RecursiveDirectoryIterator($config_dir)
				);

				// iterate through all subdirs,
				// look for vhost/diroption files
				// and delete them
				foreach ($its as $fullFileName => $it ) {
					if ($it->isFile() && preg_match($pattern, $it->getFilename())) {
						// remove file
						safe_exec('rm -f '. escapeshellarg(makeCorrectFile($its->getPathname())));
					}
				}
			}
		}
	}

	/**
	 * remove htpasswd files before regeneration
	 *
	 * @return null
	 */
	private function _cleanHtpasswdFiles() {

		// get correct directory
		$configdir = $this->_getFile('system', 'apacheconf_htpasswddir');

		if ($configdir !== false) {
			$configdir = makeCorrectDir($configdir);

			if (@is_dir($configdir)) {
				// now get rid of old stuff
				//(but append /* so we don't delete the directory)
				$configdir.='/*';
				safe_exec('rm -rf '. makeCorrectFile($configdir));
			}
		}
	}

	/**
	 * remove awstats related configuration files before regeneration
	 *
	 * @return null
	 */
	private function _cleanAwstatsFiles() {
		
		if ($this->_settings['system']['awstats_enabled'] == '0') {
			return;
		}

		//dhr: cleanout froxlor-generated awstats configs prior to re-creation
		$awstatsclean['header'] = "## GENERATED BY FROXLOR\n";
		$awstatsclean['headerold'] = "## GENERATED BY SYSCP\n";
		$awstatsclean['path'] = $this->_getFile('system', 'awstats_conf');

		/**
		 * dont do anyting if the directory not exists
		 * (e.g. awstats not installed yet or whatever)
		 * fixes #45
		*/
		if ($awstatsclean['path'] !== false && is_dir($awstatsclean['path'])) {
			$awstatsclean['dir'] = dir($awstatsclean['path']);
			while ($awstatsclean['entry'] = $awstatsclean['dir']->read()) {
				$awstatsclean['fullentry'] = makeCorrectFile($awstatsclean['path'].'/'.$awstatsclean['entry']);
				/**
				 * dont do anything if the file does not exist
				*/
				if (@file_exists($awstatsclean['fullentry'])) {
					$awstatsclean['fh'] = fopen($awstatsclean['fullentry'], 'r');
					$awstatsclean['headerRead'] = fgets($awstatsclean['fh'], strlen($awstatsclean['header'])+1);
					fclose($awstatsclean['fh']);

					if ($awstatsclean['headerRead'] == $awstatsclean['header']
							|| $awstatsclean['headerRead'] == $awstatsclean['headerold']
					) {
						$awstats_conf_file = makeCorrectFile($awstatsclean['fullentry']);
						@unlink($awstats_conf_file);
					}
				}
			}
		}
		unset($awstatsclean);
		//end dhr
	}

	/**
	 * remove fcgid related configuration files before regeneration
	 *
	 * @return null
	 */
	private function _cleanFcgidFiles() {

		if ($this->_settings['system']['mod_fcgid'] == '0') {
			return;
		}

		// get correct directory
		$configdir = $this->_getFile('system', 'mod_fcgid_configdir');
		if ($configdir !== false) {

			$configdir = makeCorrectDir($configdir);
	
			if (@is_dir($configdir)) {
				// create directory iterator
				$its = new RecursiveIteratorIterator(
						new RecursiveDirectoryIterator($configdir)
				);
	
				// iterate through all subdirs,
				// look for php-fcgi-starter files
				// and take immutable-flag away from them
				// so we can delete them :)
				foreach ($its as $fullFileName => $it ) {
					if ($it->isFile() && $it->getFilename() == 'php-fcgi-starter') {
						// set chattr -i
						removeImmutable($its->getPathname());
					}
				}
	
				// now get rid of old stuff
				//(but append /* so we don't delete the directory)
				$configdir.='/*';
				safe_exec('rm -rf '. makeCorrectFile($configdir));
			}
		}
	}

	/**
	 * remove php-fpm related configuration files before regeneration
	 *
	 * @return null
	 */
	private function _cleanFpmFiles() {

		if ($this->_settings['phpfpm']['enabled'] == '0') {
			return;
		}

		// get correct directory
		$configdir = $this->_getFile('phpfpm', 'configdir');
		if ($configdir !== false) {

			$configdir = makeCorrectDir($configdir);

			if (@is_dir($configdir)) {
				// now get rid of old stuff
				//(but append /* so we don't delete the directory)
				$configdir.='/*';
				safe_exec('rm -rf '. makeCorrectFile($configdir));
			}
		}
	}

	/**
	 * returns a file/direcotry from the settings array and checks whether it exists
	 *
	 * @param string $group         settings-group
	 * @param string $varname       var-name
	 * @param boolean $check_exists check if the file exists
	 *
	 * @return string|boolean complete path including filename if any or false on error
	 */
	private function _getFile($group, $varname, $check_exists = true) {

		// read from settings
		$file = $this->_settings[$group][$varname];

		// check whether it exists
		if ($check_exists && @file_exists($file) == false) {
			return false;
		}
		return $file;
	}
}