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File name : class.A2OptJoomla.php
Content :
<?php

class A2OptJoomla extends A2OptBase {
	public $app;
	public $db_connection;
	public $db_server;
	public $db_prefix;
	public $db_name;
	public $db_user;
	public $db_passwd;
	public $memcached_socket;
	public $db_port;
	public $db_type;
	public $pdo;
	public $version;
	public $cache_handler;

	public function __construct($app) {
		$this->exit_on_error = false;
		$this->pdo = null;
		$this->db_connection = new MySQLi();
		$this->db_name = '';
		$this->db_server = '';
		$this->db_prefix = '';
		$this->db_user = '';
		$this->db_type = '';
		$this->db_port = '3306';
		$this->db_password = '';

		$this->app = $app;
		$this->path = $app->path;
		$this->domain = $app->domain;
		$this->type = 'Joomla';
		$this->db_connect();
		if (is_null($this->db_connection)) {
			$this->log_action('Unable to connect to DB ' . $this->path);
			$this->type = null;

			return;
		}

		$this->title = $this->check_app_title($this->get_variable('sitename'), $app);
		
		$this->version = $this->get_joomla_version();
			
		$this->set_instance();
		if (isset($this->instance->socket)) {
			if(version_compare($this->version, '2.5', '>=') && version_compare($this->version, '3.0', '<')){
				$this->cache_handler = 'memcached';
				$this->memcached_socket = $this->instance->socket_path;
			}
			if(version_compare($this->version, '3.0', '>=') && version_compare($this->version, '3.6', '<=')){
				$this->cache_handler = 'memcache';
				$this->memcached_socket = $this->instance->socket;
			}
			if(version_compare($this->version, '3.7', '>=') && version_compare($this->version, '4.0', '<')){
				$this->cache_handler = 'memcached';
				$this->memcached_socket = $this->instance->socket_path;
				
			}
			if(version_compare($this->version, '4.0', '>=')){
				$this->cache_handler = 'memcached';
				$this->memcached_socket = $this->instance->socket;
			}
		}
		$this->exit_on_error = true;
	}

	public function get_joomla_version() {
		$version = "2.5"; // default
		
		$possible_locations = [
			'/libraries/cms/version/version.php',
			'/libraries/src/version/Version.php',
			'/libraries/src/Version.php',
		];

		foreach($possible_locations as $loc){
			if(file_exists($this->path . $loc)){
				$file_contents = file_get_contents($this->path . $loc);
				$lines = explode("\n", $file_contents);
				
				if($loc == '/libraries/cms/version/version.php'){
					// Version 2.x
					foreach($lines as $line){
						if(stripos($line, 'public $RELEASE =') !== false){
							$version = str_replace(['public $RELEASE = ', ';', "'"], '', $line);
							$version = trim($version);
						}
					}
				} else {
					// Version 3.x / 4.x
					$major_version = '';
					$minor_version = '';
					
					foreach($lines as $line){
						if(stripos($line, 'const MAJOR_VERSION =') !== false){
							$major_version = str_replace(['const MAJOR_VERSION = ', ';'], '', $line);
							$major_version = trim($major_version);
						}
						if(stripos($line, 'const MINOR_VERSION =') !== false){
							$minor_version = str_replace(['const MINOR_VERSION = ', ';'], '', $line);
							$minor_version = trim($minor_version);
						}
					}

					$version = $major_version . '.' . $minor_version;
				}
			}
		}

		return (string)$version;
	}

	public function enable_memcached() {
		//Joomla!
		$config_file = "{$this->path}/configuration.php";
		if (!file_exists($config_file)) {
			$this->error('The Joomla! configuration.php file is not in the usual location.');
		}

		if (!is_writable($config_file)) {
			chmod($config_file, 664);
			if (!is_writable($config_file)) {
				$this->error('The web server does not have write access to the Joomla! configuration.php file');
			}
		}

		if(version_compare($this->version, '2.5', '>=') && version_compare($this->version, '3.0', '<')){
			// 2.5 -> 2.9
			$this->set_variable('caching', '2');
			$this->set_variable('memcache_persist', '1');
			$this->set_variable('memcache_compress', '1');
			$this->set_variable('cachetime', '15');
			$this->set_variable('cache_handler', 'memcached');
			$this->set_variable('session_handler', 'memcached');
		}
		
		if(version_compare($this->version, '3.0', '>=') && version_compare($this->version, '3.6', '<=')){
			// 3.0 -> 3.6
			$this->set_variable('caching', '2');
			$this->set_variable('memcache_persist', '1');
			$this->set_variable('memcache_compress', '1');
			$this->set_variable('cachetime', '15');
			$this->set_variable('cache_handler', 'memcache');
			$this->set_variable('session_handler', 'memcache');
		}
		
		if(version_compare($this->version, '3.7', '>=') && version_compare($this->version, '4.0', '<')){
			// 3.7+
			$this->set_variable('caching', '2');
			$this->set_variable('memcache_persist', '1');
			$this->set_variable('memcache_compress', '1');
			$this->set_variable('cachetime', '15');
			$this->set_variable('cache_handler', 'memcached');
			$this->set_variable('session_handler', 'memcached');
			$this->memcached_socket = $this->instance->socket_path;
		}

		if(version_compare($this->version, '4.0', '>=')){
			//  4.0+
			$this->set_variable('caching', 2, '', true);
			$this->set_variable('memcache_persist', 1, '', true);
			$this->set_variable('memcache_compress', 1, '', true);
			$this->set_variable('cachetime', 15, '', true);
			$this->set_variable('cache_handler', 'memcached');
			$this->set_variable('session_handler', 'memcached');
		}
		$this->set_variable('session_memcache_server_host', $this->memcached_socket, 'session_memcached_server_host');
		$this->set_variable('session_memcache_server_port', '0', 'session_memcached_server_port');
		$this->set_variable('memcache_server_host', $this->memcached_socket, 'memcached_server_host');
		$this->set_variable('memcache_server_port', '0', 'memcached_server_port');
	}

	public function disable_memcached() {//Joomla
		$config_file = "{$this->path}/configuration.php";
		if (!file_exists($config_file)) {
			$this->error('The Joomla! configuration.php file is not in the usual location.');
		}

		if (!is_writable($config_file)) {
			chmod($config_file, 664);
			if (!is_writable($config_file)) {
				$this->error('The web server does not have write access to the Joomla! configuration.php file');
			}
		}

		$config = file_get_contents("{$this->path}/configuration.php");

		$config = preg_replace(array(
			"/[^;]*session_memcached?_server_host[^;]*;\n?/",
			"/[^;]*session_memcached?_server_port[^;]*;\n?/",
			"/[^;]*cache_handler[^;]*;\n?/",
			"/[^;]*memcached?_server_host[^;]*;\n?/",
			"/[^;]*memcached?_server_port[^;]*;\n?/",
			"/[^;]*memcached?_persist[^;]*;\n?/",
			"/[^;]*memcached?_compress[^;]*;\n?/",
			"/[^;]*cachetime[^;]*;\n?/",
			"/[^;]*session_handler[^;]*;\n?/",
			"/[^;]*caching[^;]*;\n?/",
		), "\n", $config);

		if(version_compare($this->version, '2.5', '>=') && version_compare($this->version, '4.0', '<')){
		$new_params = <<<CODE
;
	public \$caching = '0';
	public \$cache_handler = 'file';
	public \$cachetime = '15';
	public \$session_handler = 'none';
}

CODE;
		}

		if(version_compare($this->version, '4.0', '>=')){
		$new_params = <<<CODE
;
	public \$caching = 0;
	public \$cache_handler = 'file';
	public \$cachetime = '15';
	public \$session_handler = 'none';
}

CODE;
		}
		
		$config = str_replace(array(";\n}",';}'), $new_params, $config);

		$fp = fopen($config_file, 'w');
		fwrite($fp, trim($config));
		fclose($fp);
	}

	public function is_memcached_enabled() {
		if ($cache_handler = $this->get_variable('cache_handler')) {
			if ($cache_handler == $this->cache_handler) {
				return true;
			}
		}

		return false;
	}

	public function is_extension_enabled($name) {
		$table = $this->get_table('extensions');
		$pdo = $this->get_pdo();
		$stmt = $pdo->prepare("select enabled from {$table} where name = ?");
		$stmt->execute(array($name));
		if ($stmt->rowCount() >= 1) {
			$extension = $stmt->fetchObject();
			if ( isset( $extension->enabled ) ) {
				return $extension->enabled == 1;
			}
		}

		return false;
	}

	public function is_extension_installed($name) {
		$table = $this->get_table('extensions');
		$pdo = $this->get_pdo();
		$stmt = $pdo->prepare("select enabled from {$table} where name = ?");
		$stmt->execute(array($name));
		if ($stmt->rowCount() >= 1) {
			return true;
		}

		return false;
	}

	public function enable_extension($name) {
		$table = $this->get_table('extensions');
		$pdo = $this->get_pdo();
		$stmt = $pdo->prepare("update {$table} set enabled=1 where name = ?");
		$stmt->execute(array($name));
		if ($stmt->rowCount() >= 1) {
			return(true);
		} else {
			error_log('Extension query failed');
		}

		return false;
	}

	public function disable_extension($name) {
		$table = $this->get_table('extensions');
		$pdo = $this->get_pdo();
		$stmt = $pdo->prepare("update {$table} set enabled=0 where name = ?");
		$stmt->execute(array($name));
		if ($stmt->rowCount() >= 1) {
			return(true);
		} else {
			error_log('Extension query failed');
		}

		return false;
	}

	public function set_extension_params($name, $params) {
		$table = $this->get_table('extensions');
		$pdo = $this->get_pdo();
		$stmt = $pdo->prepare("select params from {$table} where name = ?");
		$stmt->execute(array($name));
		if ($stmt->rowCount() >= 1) {
			$extension = $stmt->fetchObject();
			if ( isset( $extension->params ) ) {
				$current_params = json_decode($extension->params, true);
				$new_params = array_merge($current_params, $params);
				$new_json_params = json_encode($new_params);
				$stmt = $pdo->prepare("update {$table} set params=? where name = ?");
				$stmt->execute(array($new_json_params,$name));
				if ($stmt->rowCount() == 1) {
					return true;
				}
			}
		} else {
			error_log('Extension query failed');
		}

		return false;
	}

	public function get_extension_params($name) {
		$table = $this->get_table('extensions');
		$pdo = $this->get_pdo();
		$stmt = $pdo->prepare("select params from {$table} where name = ?");
		$stmt->execute(array($name));
		if ($stmt->rowCount() >= 1) {
			$extension = $stmt->fetchObject();
			if (isset($extension->params)) {
				return json_decode($extension->params, true);
			}
		}

		return array();
	}

	public function install_extension($location, $name) {
		if ( !$this->is_extension_installed($name) ) {
			$cmd = __DIR__ . "/../../joomla/install-extension --package={$location}";
			$this->su_exec($cmd, $this->path);
		}
		if ($res == 'Extension successfully installed') {
			return true;
		} else {
			return false;
		}
	}

	public function install_jch() {
		if(version_compare($this->version, '3.7', '>=')){
			return $this->install_extension(__DIR__ . '/../../joomla/pkg_jchoptimize_1.7.0.zip', 'PLG_SYSTEM_JCH_OPTIMIZE');
		} else {
			return $this->install_extension(__DIR__ . '/../../joomla/jch_optimize.zip', 'PLG_SYSTEM_JCH_OPTIMIZE');
		}
	}

	public function is_jch_installed() {
		return $this->is_extension_installed('PLG_SYSTEM_JCH_OPTIMIZE');
	}

	public function enable_jch() {
		if (!$this->is_jch_enabled()) {
			if ( !$this->is_jch_installed() ) {
				$this->install_jch();
			}
			$this->enable_extension('PLG_SYSTEM_JCH_OPTIMIZE');
		}
	}

	public function is_jch_enabled() {
		return $this->is_extension_enabled('PLG_SYSTEM_JCH_OPTIMIZE');
	}

	public function disable_jch() {
		if ($this->is_jch_enabled()) {
			//Undo Minimum settings to no settings
			$this->set_extension_params('PLG_SYSTEM_JCH_OPTIMIZE', json_decode('{"css":"0","javascript":"0","gzip":"0","css_minify":"0","js_minify":"0","html_minify":"0","defer_js":"0","bottom_js":"0","html_minify_level":"0","lifetime":"30","excludeAllExtensions":"1","jchmenu":"101","htaccess":"2","debug":"0","log":"0","try_catch":"0","csg_enable":"0","csg_direction":"vertical","csg_wrap_images":"0"}', true));
			$this->disable_extension('PLG_SYSTEM_JCH_OPTIMIZE');
		}

		return true;
	}

	public function set_minimal_jch() {
		$this->enable_jch();
		$this->set_extension_params('PLG_SYSTEM_JCH_OPTIMIZE', json_decode('{"css":"1","javascript":"1","gzip":"0","css_minify":"0","js_minify":"0","html_minify":"0","defer_js":"0","bottom_js":"0","html_minify_level":"0","lifetime":"30","excludeAllExtensions":"1","jchmenu":"101","htaccess":"2","debug":"0","log":"0","try_catch":"0","csg_enable":"0","csg_direction":"vertical","csg_wrap_images":"0"}', true));
	}

	public function jch_level() {
		$level = 0;
		$params = $this->get_extension_params('PLG_SYSTEM_JCH_OPTIMIZE');
		if ($params['css'] == '1' && $params['javascript'] == '1') {
			$level = 1;
			if ($params['gzip'] == '1' && $params['css_minify'] == '1' && $params['js_minify'] == '1' && $params['html_minify'] == '1') {
				$level = 2;
				if ($params['excludeAllExtensions'] == '0') {
					$level = 3;
				}
			}
		}
		//level 0 off
		//level 1 minimal
		//level 2 intermediate
		//level 3 average
		return $level;
	}

	public function set_intermediate_jch() {
		$this->enable_jch();
		$this->set_extension_params('PLG_SYSTEM_JCH_OPTIMIZE', json_decode('{"css":"1","javascript":"1","gzip":"1","css_minify":"1","js_minify":"1","html_minify":"1","defer_js":"0","bottom_js":"0","html_minify_level":"0","lifetime":"30","excludeAllExtensions":"1","jchmenu":"101","htaccess":"0","debug":"0","log":"0","try_catch":"0","csg_enable":"0","csg_direction":"vertical","csg_wrap_images":"0"}', true));
	}

	public function set_average_jch() {
		$this->enable_jch();
		$this->set_extension_params('PLG_SYSTEM_JCH_OPTIMIZE', json_decode('{"css":"1","javascript":"1","gzip":"1","css_minify":"1","js_minify":"1","html_minify":"1","defer_js":"0","bottom_js":"0","html_minify_level":"0","lifetime":"30","excludeAllExtensions":"0","jchmenu":"101","htaccess":"0","debug":"0","log":"0","try_catch":"0","csg_enable":"0","csg_direction":"vertical","csg_wrap_images":"0"}', true));
	}

	private function get_pdo() {
		if ( isset($this->db_server) && !empty($this->db_server) &&
			isset($this->db_passwd) && !empty($this->db_passwd) &&
			isset($this->db_user) && !empty($this->db_user) &&
			isset($this->db_name) && !empty($this->db_name) ) {
			$this->db_connection = new MySQLi($this->db_server, $this->db_user, $this->db_passwd, $this->db_name);
			if ($this->db_connection->connect_errno) {
				return null;
			} else {
				try {
					return new A2OptPDO($this->db_server, $this->db_user, $this->db_passwd, $this->db_name);
				} catch ( PDOException $Exception ) {
					$this->error('Could not connect to the database.');

					return null;
				}
			}
		}

		return null;
	}

	public function get_table($name) {
		//using spaces for ordering purposes.
		//need to replace spaces with proper ordering filter in AngularJS

		//$pdo = $this->get_pdo();
		if ( !( is_null($this->pdo) ) ) {
			$var = "{$this->db_prefix}{$name}";
			$table = '';
			$stmt = $this->pdo->prepare('SHOW Tables LIKE ?');
			$stmt->execute(array($var));
			if ($res = $stmt->fetchAll()) {
				$table = $res[0][0];
			} else {
				$var = "%{$name}";
				$stmt = $this->pdo->prepare('SHOW Tables LIKE ?');
				$stmt->execute(array($var));
				if ($res = $stmt->fetchAll()) {
					$table = $res[0][0];
				}
			}

			return $table;
		} else {
			$this->error('Cannot connect to the Joomla! database');
		}

		return false;
	}

	public function get_optimizations() {
		$this_class = $this;

		$optimizations = array(
			'       Conservative Caching' => array(
				'description' => 'Static full page caching',
				'optimized' => (intval($this->get_variable('caching')) >= 1),
				'enable' => function () use (&$this_class) {
					$this_class->set_variable('caching', '1');
					$this_class->set_variable('cache_handler', 'file');
				},
				'disable' => function () use (&$this_class) {
					$this_class->set_variable('caching', '0');
				},
				'automatic' => true,
				'type' => 'variable',
			),
			'        Store Sessions in File' => array(
				'description' => 'Store user data in files instead of in the database.  If using memcached this option will show as enabled: memcached sessions are stored in RAM, which is faster.',
				'optimized' => ($this->get_variable('session_handler') == 'memcache' || $this->get_variable('session_handler') == 'none'),
				'enable' => function () use (&$this_class) {
					if ($this->get_variable('session_handler') != 'memcache') {
						$this_class->set_variable('session_handler', 'none');
					}
				},
				'disable' => function () use (&$this_class) {
					$this_class->set_variable('session_handler', 'database');
				},
				'automatic' => true,
				'type' => 'variable',
			),
			'      Cache Time' => array(
				'description' => 'How long should pages be cached. Longer is better for performance.',
				'optimized' => (intval($this->get_variable('cachetime')) == 60),
				'enable' => function () use (&$this_class) {
					$this_class->set_variable('cachetime', '60');
				},
				'disable' => function () use (&$this_class) {
					$this_class->set_variable('cachetime', '15');
				},
				'enabled_text' => '1 Hour',
				'disabled_text' => '15 minutes',
				'automatic' => true,
				'type' => 'variable',
			),
			'     File Compression' => array(
				'description' => 'Enable Gzip compression to reduce the size of files sent to the user.',
				'optimized' => ( intval($this->get_variable('gzip')) == 1 ),
				'enable' => function () use (&$this_class) {
					$this_class->set_variable('gzip', '1');
				},
				'disable' => function () use (&$this_class) {
					$this_class->set_variable('gzip', '0');
				},
				'automatic' => true,
				'type' => 'variable',
			),
			'    Browser Caching' => array(
				'description' => 'Enable browser caching of static resources.',
				'optimized' => ( $this->is_browser_cache() === true ),
				'enable' => function () use (&$this_class) {
					$this->enable_browser_cache();
				},
				'disable' => function () use (&$this_class) {
					$this->disable_browser_cache();
				},
				'type' => 'variable',
				'automatic' => true,
			),
			'   Combine JS/CSS Files' => array(
				'description' => 'Uses the JCH Optimize Extension to automatically combine JS/CSS Files.',
				'optimized' => ($this->jch_level() >= 1),
				'enable' => function () use (&$this_class) {
					$this->set_minimal_jch();
				},
				'disable' => function () use (&$this_class) {
					$this->disable_jch();
				},
				'automatic' => true,
				'type' => 'plugin',
			),
			'  Minify JS/CSS/HTML Files' => array(
				'description' => "Uses the JCH Optimize Extension to automatically minify JS/CSS Files. Requires 'Combine JS/CSS Files'",
				'optimized' => ($this->jch_level() >= 2),
				'enable' => function () use (&$this_class) {
					$this->set_intermediate_jch();
				},
				'disable' => function () use (&$this_class) {
					$this->set_minimal_jch();
				},
				'automatic' => false,
				'type' => 'plugin',
			),
			' Include Extensions in JS/CSS/HTML Minify' => array(
				'description' => "Uses the JCH Optimize Extension to automatically minify JS/CSS Files. Requires 'Combine JS/CSS Files'",
				'optimized' => ($this->jch_level() >= 3),
				'enable' => function () use (&$this_class) {
					$this->set_average_jch();
				},
				'disable' => function () use (&$this_class) {
					$this->set_intermediate_jch();
				},
				'automatic' => false,
				'type' => 'plugin',
			),
			'Debugging' => array(
				'description' => "Disable 'Debug System' and 'Debug Language'.",
				'optimized' => (intval($this->get_variable('debug')) + intval($this->get_variable('debug_lang')) === 0),
				'enable' => function () use (&$this_class) {
					$this_class->set_variable('debug', '0');
					$this_class->set_variable('debug_lang', '0');
				},
				'disable' => function () use (&$this_class) {
					$this_class->set_variable('debug', '1');
					$this_class->set_variable('debug_lang', '1');
				},
				'enabled_text' => 'Off',
				'disabled_text' => 'On',
				'automatic' => true,
				'type' => 'variable',
			),
			'Memcached' => array(
				'optimized' => $this->is_memcached_enabled(),
				'description' => 'Caching of database query results in memory',
				'controller' => 'Memcached',
				'advanced' => true
			),
			'TurboCache' => array(
				'optimized' => $this->app->swiftcache->turbocache->enabled,
				'description' => 'Static file caching by the web Server',
				'controller' => 'TurboCache',
				'advanced' => true
			)
		);

		if(version_compare($this->version, '4.0', '>=')){
			unset($optimizations['   Combine JS/CSS Files']);
			unset($optimizations['  Minify JS/CSS/HTML Files']);
			unset($optimizations[' Include Extensions in JS/CSS/HTML Minify']);
		}

		return $optimizations;
	}

	public function set_optimization($name, $optimize) {
		$optimizations = $this->get_optimizations();
		if (array_key_exists($name, $optimizations)) {
			if (isset($optimizations[$name]['type'])) {
				switch ($optimize) {
					case true:
						if (isset($optimizations[$name]['enable'])) {
							$optimizations[$name]['enable']();
						}
						break;
					case false:
						if (isset($optimizations[$name]['disable'])) {
							$optimizations[$name]['disable']();
						}
						break;
				}
			}
		}

		return $this->get_optimizations();
	}

	public function get_percent_optimized() {
		$optimizations = $this->get_optimizations();
		$count = 0;
		foreach ($optimizations as $name => $optimization) {
			if ($optimization['optimized']) {
				$count ++;
			}
		}

		return round(($count / (count($optimizations))) * 100);
	}

	public function is_browser_cache() {
		$rules = array(
			'ExpiresActive On',
			'ExpiresByType image/gif "access plus 1 month"',
			'ExpiresByType image/jpeg "access plus 1 month"',
			'ExpiresByType image/png "access plus 1 month"',
			'ExpiresByType text/css "access plus 1 week"',
			'ExpiresByType text/javascript "access plus 1 week"',
			'ExpiresByType application/javascript "access plus 1 week"',
			'ExpiresDefault "access plus 1 week"',
		);

		return $this->check_htaccess_rules($this->get_htaccess(), $rules);
	}

	public function enable_browser_cache() {
		$rules = array(
			'ExpiresActive On',
			'ExpiresByType image/gif "access plus 1 month"',
			'ExpiresByType image/jpeg "access plus 1 month"',
			'ExpiresByType image/png "access plus 1 month"',
			'ExpiresByType text/css "access plus 1 week"',
			'ExpiresByType text/javascript "access plus 1 week"',
			'ExpiresByType application/javascript "access plus 1 week"',
			'ExpiresDefault "access plus 1 week"',
		);

		$this->add_htaccess_rules($this->get_htaccess_file(), $rules, 'mod_expires.c');
	}

	public function disable_browser_cache() {
		$rules = array(
			'ExpiresActive On',
			'ExpiresByType image/gif "access plus 1 month"',
			'ExpiresByType image/jpeg "access plus 1 month"',
			'ExpiresByType image/png "access plus 1 month"',
			'ExpiresByType text/css "access plus 1 week"',
			'ExpiresByType text/javascript "access plus 1 week"',
			'ExpiresByType application/javascript "access plus 1 week"',
			'ExpiresDefault "access plus 1 week"',
		);
		$this->comment_htaccess_rules($this->get_htaccess_file(), $rules);
	}

	/*public function get_percent_optimized(){
		$count = 0;
		if($cache_handler = $this->get_variable('cache_handler')){
			switch($cache_handler){
				case 'memcache':
					$count += 2;
				case 'file':
					$count++;
			}
		}
		if($gzip = $this->get_variable('gzip')){
			if($gzip == '1')
				$count++;
		}

		return ($count*100)/3;
	}*/

	public function db_connect() {
		if (file_exists("{$this->path}/configuration.php")) {
			$config = file_get_contents("{$this->path}/configuration.php");

			if (preg_match('/\$dbtype\s*=\s*[\'"](.*)[\'"]\s*;/', $config, $db_match)) {
				$this->db_type = array_pop($db_match);
			}
			if (preg_match('/\$db\s*=\s*[\'"](.*)[\'"]\s*;/', $config, $db_match)) {
				$this->db_name = array_pop($db_match);
			}
			if (preg_match('/\$user\s*=\s*[\'"](.*)[\'"]\s*;/', $config, $db_match)) {
				$this->db_user = array_pop($db_match);
			}
			if (preg_match('/\$password\s*=\s*[\'"](.*)[\'"]\s*;/', $config, $db_match)) {
				$this->db_passwd = array_pop($db_match);
			}
			if (preg_match('/\$host\s*=\s*[\'"](.*)[\'"]\s*;/', $config, $db_match)) {
				$this->db_server = array_pop($db_match);
			}
			if (preg_match('/\$dbprefix\s*=\s*[\'"](.*)[\'"]\s*;/', $config, $db_match)) {
				$this->db_prefix = array_pop($db_match);
			}
			$this->db_connection = new MySQLi($this->db_server, $this->db_user, $this->db_passwd, $this->db_name);

			if ($this->db_connection->connect_errno) {
				$this->error('Could not connect to the Joomla! database.');
				$this->db_connection = null;

				return;
			}

			try {
				$this->pdo = new A2OptPDO($this->db_server, $this->db_user, $this->db_passwd, $this->db_name);
			} catch (PDOException $e) {
				$this->error('Could not connect to the Joomla! database.');
				$this->db_connection = null;

				return;
			}

			return true;
		} else {
			$this->type = null;
			$this->db_connection = null;
		}

		return false;
	}

	public function get_variable($name = 'sitename') {
		$value = false;
		if (file_exists("{$this->path}/configuration.php")) {
			$config = file_get_contents("{$this->path}/configuration.php");
			if (preg_match("/\\\${$name}\s*=\s*['\\\"](.*)['\\\"]\s*;/", $config, $match)) {
				$value = $match[1];
			}
		}

		return $value;
	}

	public function set_variable($name, $value, $alternate_name = '', $use_bool = false) {
		$oldval = $this->get_variable($name);
		$alt = false;
		if ($oldval === false && $alternate_name != '') {
			$oldval = $this->get_variable($alternate_name);
			if ( !($oldval === false) ) {
				$alt = true;
			}
		}
		if (!($value === $oldval)) {
			$config_file = "{$this->path}/configuration.php";

			if (file_exists($config_file)) {
				if (!is_writable($config_file)) {
					chmod($config_file, 0664);
				}
				$config = file_get_contents("{$this->path}/configuration.php");
				if (!$alt) {
					if($use_bool){
						$new_config = preg_replace('/\$'.$name.'.*;/', "\$".$name." = ".$value.";", $config);
					} else {
						$new_config = preg_replace('/\$'.$name.'.*;/', "\$".$name." = '".$value."';", $config);
					}
				} else {
					if($use_bool){
						$new_config = preg_replace('/\$'.$alternate_name.'.*;/', "\$".$name." = ".$value.";", $config);
					} else {
						$new_config = preg_replace('/\$'.$alternate_name.'.*;/', "\$".$name." = '".$value."';", $config);
					}
				}
				if ($config == $new_config) {
					if($use_bool){
						$new_config = preg_replace('/}$/', "\tpublic \${$name} = {$value};\n}", $config);
					} else {
						$new_config = preg_replace('/}$/', "\tpublic \${$name} = '{$value}';\n}", $config);
					}
				} else {
					$new_config = $this->uncomment_variable($name, $new_config);
				}
				if (is_writable($config_file) && $config != $new_config) {
					copy($config_file, $config_file . '.bak-' . floor(time() / 6) . '.php');
					$fh = fopen($config_file, 'w');
					fwrite($fh, $new_config);
					fclose($fh);
				}
			} else {
				return false;
			}
		}

		return true;
	}

	public function uncomment_variable($name, $old_config = null) {
		$config_file = "{$this->path}/configuration.php";
		if (file_exists($config_file)) {
			if (!is_writable($config_file)) {
				chmod($config_file, 0664);
			}

			if ( $old_config === null ) {
				$config = file_get_contents($config_file);
			} else {
				$config = $old_config;
			}
			$new_config = preg_replace("/([\/]{2}[\s\/]*)([^\/]*\\\${$name}\s*=\s*['\\\"].*['\\\"]\s*;)/Ux", "\t$2", $config);
			if ( $old_config === null ) {
				if ($new_config != $old_config) {
					if (is_writable($config_file)) {
						copy($config_file, $config_file . '.bak-' . floor(time() / 6) . '.php');
						$fh = fopen($config_file, 'w');
						fwrite($fh, $new_config);
						fclose($fh);
					} else {
						$this->error('Cannot edit configuration.php.  The file is not writable!');
					}

					return true;
				}
			} else {
				return $new_config;
			}
		}

		return false;
	}

	public function comment_variable($name, $old_config = null) {
		$config_file = "{$this->path}/configuration.php";
		if (file_exists($config_file)) {
			if (!is_writable($config_file)) {
				chmod($config_file, 0664);
			}

			if ( $old_config === null ) {
				$config = file_get_contents($config_file);
			} else {
				$config = $old_config;
			}
			$new_config = preg_replace("/(.*\\\${$name}\s*=\s*['\\\"].*['\\\"]\s*;)/", '//$1', $config);
			if ( $old_config === null ) {
				if ($new_config != $old_config) {
					if (is_writable($config_file)) {
						copy($config_file, $config_file . '.bak-' . floor(time() / 6) . '.php');
						$fh = fopen($config_file, 'w');
						fwrite($fh, $new_config);
						fclose($fh);
					} else {
						$this->error('Cannot edit configuration.php.  The file is not writable!');
					}

					return true;
				}
			} else {
				return $new_config;
			}
		}

		return false;
	}

	public function get_turbocache_defaults() {
		return array(
			'reject_urls' => array(
				'admin', 'login', 'register'
			),
			'reject_cookies' => array(
				'logged'
			),
			'time' => '15 Minutes',
			'ttl' => 900,
			'enabled' => true
		);
	}

	public function optimize() {
		$optimizations = $this->get_optimizations();
		foreach ($optimizations as $name => $optimization) {
			if (!$optimization['optimized']) {
				$this->set_optimization($name, true);
			}
		}
	}
}
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