<?php

/*
Copyright (c) 2007-2012, Till Brehm, projektfarm Gmbh, Oliver Vogel www.muv.com
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name of ISPConfig nor the names of its contributors
      may be used to endorse or promote products derived from this software without
      specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

class software_update_plugin {

	var $plugin_name = 'software_update_plugin';
	var $class_name  = 'software_update_plugin';

	//* This function is called during ispconfig installation to determine
	//  if a symlink shall be created for this plugin.
	public function onInstall() {
		global $conf;

		return true;

	}


	/*
	 	This function is called when the plugin is loaded
	*/

	public function onLoad() {
		global $app;

		/*
		Register for the events
		*/

		$app->plugins->registerEvent('software_update_inst_insert', $this->plugin_name, 'process');
		//$app->plugins->registerEvent('software_update_inst_update',$this->plugin_name,'process');
		//$app->plugins->registerEvent('software_update_inst_delete',$this->plugin_name,'process');

		//* Register for actions
		$app->plugins->registerAction('os_update', $this->plugin_name, 'os_update');


	}

	private function set_install_status($inst_id, $status) {
		global $app;

		$app->db->query("UPDATE software_update_inst SET status = ? WHERE software_update_inst_id = ?", $status, $inst_id);
		$app->dbmaster->query("UPDATE software_update_inst SET status = ? WHERE software_update_inst_id = ?", $status, $inst_id);
	}

	public function process($event_name, $data) {
		global $app, $conf;

		//* Get the info of the package:
		$software_update_id = intval($data["new"]["software_update_id"]);
		$software_update = $app->db->queryOneRecord("SELECT * FROM software_update WHERE software_update_id = ?", $software_update_id);
		$software_package = $app->db->queryOneRecord("SELECT * FROM software_package WHERE package_name = ?", $software_update['package_name']);

		if($software_package['package_type'] == 'ispconfig' && !$conf['software_updates_enabled'] == true) {
			$app->log('Software Updates not enabled on this server. To enable updates, set $conf["software_updates_enabled"] = true; in config.inc.php', LOGLEVEL_WARN);
			$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
			return false;
		}

		$installuser = '';
		if($software_package['package_type'] == 'ispconfig') {
			$installuser = '';
		} elseif ($software_package['package_type'] == 'app') {
			$installuser = 'ispapps';
		} else {
			$app->log('package_type not supported', LOGLEVEL_WARN);
			$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
			return false;
		}

		$temp_dir = '/tmp/'.md5(uniqid(rand()));
		$app->log("The temp dir is $temp_dir", LOGLEVEL_DEBUG);
		mkdir($temp_dir);
		if($installuser != '') chown($temp_dir, $installuser);

		if(!is_dir($temp_dir)) {
			$app->log("Unable to create temp directory.", LOGLEVEL_WARN);
			$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
			return false;
		}

		//* Replace placeholders in download URL
		$software_update["update_url"] = str_replace('{key}', $software_package['package_key'], $software_update["update_url"]);

		//* Download the update package
		$cmd = "cd $temp_dir && wget ".$software_update["update_url"];
		if($installuser == '') {
			exec($cmd);
		} else {
			exec("su -c ".escapeshellarg($cmd)." $installuser");
		}
		$app->log("Downloading the update file from: ".$software_update["update_url"], LOGLEVEL_DEBUG);

		//$url_parts = parse_url($software_update["update_url"]);
		//$update_filename = basename($url_parts["path"]);
		//* Find the name of the zip file which contains the app.
		$tmp_dir_handle = dir($temp_dir);
		$update_filename = '';
		while (false !== ($t = $tmp_dir_handle->read())) {
			if($t != '.' && $t != '..' && is_file($temp_dir.'/'.$t) && substr($t, -4) == '.zip') {
				$update_filename = $t;
			}
		}
		$tmp_dir_handle->close();
		unset($tmp_dir_handle);
		unset($t);

		if($update_filename == '') {
			$app->log("No package file found. Download failed? Installation aborted.", LOGLEVEL_WARN);
			exec("rm -rf $temp_dir");
			$app->log("Deleting the temp directory $temp_dir", LOGLEVEL_DEBUG);
			$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
			return false;
		}

		$app->log("The update filename is $update_filename", LOGLEVEL_DEBUG);

		if(is_file($temp_dir.'/'.$update_filename)) {

			//* Checking the md5sum
			if(md5_file($temp_dir.'/'.$update_filename) != $software_update["update_md5"]) {
				$app->log("The md5 sum of the downloaded file is incorrect. Update aborted.", LOGLEVEL_WARN);
				exec("rm -rf $temp_dir");
				$app->log("Deleting the temp directory $temp_dir", LOGLEVEL_DEBUG);
				$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
				return false;
			} else {
				$app->log("MD5 checksum of the downloaded file verified.", LOGLEVEL_DEBUG);
			}


			//* unpacking the update
			$cmd = "cd $temp_dir && unzip $update_filename";
			if($installuser == '') {
				exec($cmd);
			} else {
				exec("su -c ".escapeshellarg($cmd)." $installuser");
			}

			//* Create a database, if the package requires one
			if($software_package['package_type'] == 'app' && $software_package['package_requires_db'] == 'mysql') {

				$app->uses('ini_parser');
				$package_config = $app->ini_parser->parse_ini_string(stripslashes($software_package['package_config']));

				$this->create_app_db($package_config['mysql']);
				$app->log("Creating the app DB.", LOGLEVEL_DEBUG);

				//* Load the sql dump into the database
				if(is_file($temp_dir.'/setup.sql')) {
					$db_config = $package_config['mysql'];
					if( $db_config['database_user'] != '' &&
						$db_config['database_password'] != '' &&
						$db_config['database_name'] != '' &&
						$db_config['database_host'] != '') {
						system("mysql --default-character-set=utf8 --force -h '".$db_config['database_host']."' -u '".$db_config['database_user']."' ".$db_config['database_name']." < ".escapeshellcmd($temp_dir.'/setup.sql'));
						$app->log("Loading setup.sql dump into the app db.", LOGLEVEL_DEBUG);
					}
				}

			}

			//* Save the package config file as app.ini
			if($software_package['package_config'] != '') {
				file_put_contents($temp_dir.'/app.ini', $software_package['package_config']);
				$app->log("Writing ".$temp_dir.'/app.ini', LOGLEVEL_DEBUG);
			}

			if(is_file($temp_dir.'/setup.sh')) {
				// Execute the setup script
				exec('chmod +x '.$temp_dir.'/setup.sh');
				$app->log("Executing setup.sh file in directory $temp_dir", LOGLEVEL_DEBUG);
				$cmd = 'cd '.$temp_dir.' && ./setup.sh > package_install.log';
				if($installuser == '') {
					exec($cmd);
				} else {
					exec("su -c ".escapeshellarg($cmd)." $installuser");
				}

				$log_data = @file_get_contents("{$temp_dir}/package_install.log");
				if(preg_match("'.*\[OK\]\s*$'is", $log_data)) {
					$app->log("Installation successful", LOGLEVEL_DEBUG);
					$app->log($log_data, LOGLEVEL_DEBUG);
					$this->set_install_status($data["new"]["software_update_inst_id"], "installed");
				} else {
					$app->log("Installation failed:\n\n" . $log_data, LOGLEVEL_WARN);
					$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
				}
			} else {
				$app->log("setup.sh file not found", LOGLEVEL_ERROR);
				$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
			}
		} else {
			$app->log("Download of the update file failed", LOGLEVEL_WARN);
			$this->set_install_status($data["new"]["software_update_inst_id"], "failed");
		}

		if($temp_dir != '' && $temp_dir != '/') exec("rm -rf $temp_dir");
		$app->log("Deleting the temp directory $temp_dir", LOGLEVEL_DEBUG);
	}

	private function create_app_db($db_config) {
		global $app, $conf;

		if( $db_config['database_user'] != '' &&
			$db_config['database_password'] != '' &&
			$db_config['database_name'] != '' &&
			$db_config['database_host'] != '') {

			if(!include ISPC_LIB_PATH.'/mysql_clientdb.conf') {
				$app->log('Unable to open'.ISPC_LIB_PATH.'/mysql_clientdb.conf', LOGLEVEL_ERROR);
				return;
			}

			if($db_config['database_user'] == 'root') {
				$app->log('User root not allowed for App databases', LOGLEVEL_WARNING);
				return;
			}

			//* Connect to the database
			$link = mysqli_connect($clientdb_host, $clientdb_user, $clientdb_password);
			if (!$link) {
				$app->log('Unable to connect to the database'.mysqli_connect_error(), LOGLEVEL_ERROR);
				return;
			}

			$query_charset_table = '';

			//* Create the new database
			if (mysqli_query($link,'CREATE DATABASE '.mysqli_real_escape_string($link, $db_config['database_name']).$query_charset_table, $link)) {
				$app->log('Created MySQL database: '.$db_config['database_name'], LOGLEVEL_DEBUG);
			} else {
				$app->log('Unable to connect to the database'.mysqli_error($link), LOGLEVEL_ERROR);
			}

			if(mysqli_query("GRANT ALL ON ".mysqli_real_escape_string($link, $db_config['database_name']).".* TO '".mysqli_real_escape_string($link, $db_config['database_user'])."'@'".$db_config['database_host']."' IDENTIFIED BY '".mysqli_real_escape_string($link, $db_config['database_password'])."';", $link)) {
				$app->log('Created MySQL user: '.$db_config['database_user'], LOGLEVEL_DEBUG);
			} else {
				$app->log('Unable to create database user'.$db_config['database_user'].' '.mysqli_error($link), LOGLEVEL_ERROR);
			}

			mysqli_close($link);

		}

	}

	//* Operating system update
	public function os_update($action_name, $data) {
		global $app;

		//** Debian and compatible Linux distributions
		if(file_exists('/etc/debian_version')) {
			exec("aptitude update");
			exec("aptitude safe-upgrade -y");
			$app->log('Execeuted Debian / Ubuntu update', LOGLEVEL_DEBUG);
		}

		//** Gentoo Linux
		if(file_exists('/etc/gentoo-release')) {
			exec("glsa-check -f --nocolor affected");
			$app->log('Execeuted Gentoo update', LOGLEVEL_DEBUG);
		}

		return 'ok';
	}

} // end class

?>