<?php

/*
Copyright (c) 2007, Till Brehm, projektfarm Gmbh
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 mysql_clientdb_plugin {
	
	var $plugin_name = 'mysql_clientdb_plugin';
	var $class_name  = 'mysql_clientdb_plugin';
	
	//* This function is called during ispconfig installation to determine
	//  if a symlink shall be created for this plugin.
	function onInstall() {
		global $conf;
		
		if($conf['services']['db'] == true) {
			return true;
		} else {
			return false;
		}
		
	}
	
		
	/*
	 	This function is called when the plugin is loaded
	*/
	
	function onLoad() {
		global $app;
		
		/*
		Register for the events
		*/
		
		//* Mailboxes
		$app->plugins->registerEvent('database_insert',$this->plugin_name,'db_insert');
		$app->plugins->registerEvent('database_update',$this->plugin_name,'db_update');
		$app->plugins->registerEvent('database_delete',$this->plugin_name,'db_delete');
		
		
	}
	
  function process_host_list($action, $database_name, $database_user, $database_password, $host_list, $link, $database_rename_user = '') {
      global $app;
      
      $action = strtoupper($action);
      
      // set to all hosts if none given
      if(trim($host_list) == '') $host_list = '%';
      
      // process arrays and comma separated strings
      if(!is_array($host_list)) $host_list = explode(',', $host_list);
      
      $success = true;
      
      // loop through hostlist
      foreach($host_list as $db_host) {
          $db_host = trim($db_host);
          
          // check if entry is valid ip address
          $valid = true;
		  if($db_host == '%') {
		  	$valid = true;
		  } elseif(preg_match("/^[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}(\.)[0-9]{1,3}$/", $db_host)) {
              $groups = explode('.', $db_host);
              foreach($groups as $group){
                if($group<0 OR $group>255)
                $valid=false;
              }
          } else {
              $valid = false;
          }
          
          if($valid == false) continue;
          
          if($action == 'GRANT') {
              if(!$link->query("GRANT ALL ON ".$link->escape_string($database_name).".* TO '".$link->escape_string($database_user)."'@'$db_host' IDENTIFIED BY '".$link->escape_string($database_password)."';")) $success = false;
          } elseif($action == 'REVOKE') {
              //mysql_query("REVOKE ALL PRIVILEGES ON ".mysql_real_escape_string($database_name,$link).".* FROM '".mysql_real_escape_string($database_user,$link)."';",$link);
          } elseif($action == 'DROP') {
              if(!$link->query("DROP USER '".$link->escape_string($database_user)."'@'$db_host';")) $success = false;
          } elseif($action == 'RENAME') {
              if(!$link->query("RENAME USER '".$link->escape_string($database_user)."'@'$db_host' TO '".$link->escape_string($database_rename_user)."'@'$db_host'")) $success = false;
          } elseif($action == 'PASSWORD') {
              if(!$link->query("SET PASSWORD FOR '".$link->escape_string($database_user)."'@'$db_host' = PASSWORD('".$link->escape_string($database_password)."');")) $success = false;
          }
      }
      
      return $success;
  }
	
	function db_insert($event_name,$data) {
		global $app, $conf;
		
		if($data['new']['type'] == 'mysql') {
			if(!include(ISPC_LIB_PATH.'/mysql_clientdb.conf')) {
				$app->log('Unable to open'.ISPC_LIB_PATH.'/mysql_clientdb.conf',LOGLEVEL_ERROR);
				return;
			}
			
			if($data['new']['database_user'] == 'root') {
				$app->log('User root not allowed for Client databases',LOGLEVEL_WARNING);
				return;
			}
		
			//* Connect to the database
			$link = new mysqli($clientdb_host, $clientdb_user, $clientdb_password);
			if ($link->connect_error) {
				$app->log('Unable to connect to mysql'.$link->connect_error,LOGLEVEL_ERROR);
				return;
			}

			// Charset for the new table
			if($data['new']['database_charset'] != '') {
        $query_charset_table = ' DEFAULT CHARACTER SET '.$data['new']['database_charset'];
			} else {
        $query_charset_table = '';
			}

			//* Create the new database
			if ($link->query('CREATE DATABASE '.$link->escape_string($data['new']['database_name']).$query_charset_table)) {
				$app->log('Created MySQL database: '.$data['new']['database_name'],LOGLEVEL_DEBUG);
			} else {
				$app->log('Unable to create the database: '.$link->error,LOGLEVEL_WARNING);
			}
			
			// Create the database user if database is active
			if($data['new']['active'] == 'y') {
				
				if($data['new']['remote_access'] == 'y') {
          $this->process_host_list('GRANT', $data['new']['database_name'], $data['new']['database_user'], $data['new']['database_password'], $data['new']['remote_ips'], $link);
				}
				
				$db_host = 'localhost';
				$link->query("GRANT ALL ON `".str_replace(array('_','%'),array('\\_','\\%'),$link->escape_string($data['new']['database_name']))."`.* TO '".$link->escape_string($data['new']['database_user'])."'@'$db_host' IDENTIFIED BY '".$link->escape_string($data['new']['database_password'])."';");

				
			}
			
			$link->query('FLUSH PRIVILEGES;');
			$link->close();
		}
	}
	
	function db_update($event_name,$data) {
		global $app, $conf;
		
		if($data['new']['type'] == 'mysql') {
			if(!include(ISPC_LIB_PATH.'/mysql_clientdb.conf')) {
				$app->log('Unable to open'.ISPC_LIB_PATH.'/mysql_clientdb.conf',LOGLEVEL_ERROR);
				return;
			}
			
			if($data['new']['database_user'] == 'root') {
				$app->log('User root not allowed for Client databases',LOGLEVEL_WARNING);
				return;
			}
			
			//* Connect to the database
			$link = new mysqli($clientdb_host, $clientdb_user, $clientdb_password);
			if ($link->connect_error) {
				$app->log('Unable to connect to the database: '.$link->connect_error,LOGLEVEL_ERROR);
				return;
			}
			
			// Create the database user if database was disabled before
			if($data['new']['active'] == 'y' && $data['old']['active'] == 'n') {
				
				if($data['new']['remote_access'] == 'y') {
				  $this->process_host_list('GRANT', $data['new']['database_name'], $data['new']['database_user'], $data['new']['database_password'], $data['new']['remote_ips'], $link);
				}
				
				$db_host = 'localhost';
				$link->query("GRANT ALL ON `".str_replace(array('_','%'),array('\\_','\\%'),$link->escape_string($data['new']['database_name']))."`.* TO '".$link->escape_string($data['new']['database_user'])."'@'$db_host' IDENTIFIED BY '".$link->escape_string($data['new']['database_password'])."';");
				
				// mysql_query("GRANT ALL ON ".mysql_real_escape_string($data["new"]["database_name"],$link).".* TO '".mysql_real_escape_string($data["new"]["database_user"],$link)."'@'$db_host' IDENTIFIED BY '".mysql_real_escape_string($data["new"]["database_password"],$link)."';",$link);
				//echo "GRANT ALL ON ".mysql_real_escape_string($data["new"]["database_name"]).".* TO '".mysql_real_escape_string($data["new"]["database_user"])."'@'$db_host' IDENTIFIED BY '".mysql_real_escape_string($data["new"]["database_password"])."';";
			}
			
			// Remove database user, if inactive
			if($data['new']['active'] == 'n' && $data['old']['active'] == 'y') {
				
				if($data['old']['remote_access'] == 'y') {
          $this->process_host_list('DROP', '', $data['old']['database_user'], '', $data['old']['remote_ips'], $link);
				}
				
				$db_host = 'localhost';
				$link->query("DROP USER '".$link->escape_string($data['old']['database_user'])."'@'$db_host';");
				//mysql_query("REVOKE ALL PRIVILEGES ON ".mysql_real_escape_string($data["new"]["database_name"],$link).".* FROM '".mysql_real_escape_string($data["new"]["database_user"],$link)."';",$link);
			}
			
			//* Rename User
			if($data['new']['database_user'] != $data['old']['database_user']) {
				$db_host = 'localhost';
				$link->query("RENAME USER '".$link->escape_string($data['old']['database_user'])."'@'$db_host' TO '".$link->escape_string($data['new']['database_user'])."'@'$db_host'");
				if($data['old']['remote_access'] == 'y') {
					$this->process_host_list('RENAME', '', $data['old']['database_user'], '', $data['new']['remote_ips'], $link, $data['new']['database_user']);
				}
				$app->log('Renaming MySQL user: '.$data['old']['database_user'].' to '.$data['new']['database_user'],LOGLEVEL_DEBUG);
			}
			
			//* Remote access option has changed.
			if($data['new']['remote_access'] != $data['old']['remote_access']) {
				
				//* revoke old priveliges
				//mysql_query("REVOKE ALL PRIVILEGES ON ".mysql_real_escape_string($data["new"]["database_name"],$link).".* FROM '".mysql_real_escape_string($data["new"]["database_user"],$link)."';",$link);
				
				//* set new priveliges
				if($data['new']['remote_access'] == 'y') { 		
					$this->process_host_list('GRANT', $data['new']['database_name'], $data['new']['database_user'], $data['new']['database_password'], $data['new']['remote_ips'], $link);
				} else {
					$this->process_host_list('DROP', '', $data['old']['database_user'], '', $data['old']['remote_ips'], $link);
				}
				$app->log('Changing MySQL remote access privileges for database: '.$data['new']['database_name'],LOGLEVEL_DEBUG);
			} elseif($data['new']['remote_access'] == 'y' && $data['new']['remote_ips'] != $data['old']['remote_ips']) {
          //* Change remote access list
          $this->process_host_list('DROP', '', $data['old']['database_user'], '', $data['old']['remote_ips'], $link);
          $this->process_host_list('GRANT', $data['new']['database_name'], $data['new']['database_user'], $data['new']['database_password'], $data['new']['remote_ips'], $link);
      }
      
			//* Change password
			if($data['new']['database_password'] != $data['old']['database_password']) {
				$db_host = 'localhost';
				$link->query("SET PASSWORD FOR '".$link->escape_string($data['new']['database_user'])."'@'$db_host' = PASSWORD('".$link->escape_string($data['new']['database_password'])."');");
				if($link->error) {
					error_log($link->error);
				}

				if($data['new']['remote_access'] == 'y') {
					$this->process_host_list('PASSWORD', '', $data['new']['database_user'], $data['new']['database_password'], $data['new']['remote_ips']);
				}
				$app->log('Changing MySQL user password for: '.$data['new']['database_user'],LOGLEVEL_DEBUG);
			}
			
			$link->query('FLUSH PRIVILEGES;');
			$link->close();
		}
		
	}
	
	function db_delete($event_name,$data) {
		global $app, $conf;
		
		if($data['old']['type'] == 'mysql') {
			if(!include(ISPC_LIB_PATH.'/mysql_clientdb.conf')) {
				$app->log('Unable to open'.ISPC_LIB_PATH.'/mysql_clientdb.conf',LOGLEVEL_ERROR);
				return;
			}
		
			//* Connect to the database
			$link = new mysqli($clientdb_host, $clientdb_user, $clientdb_password);
			if ($link->connect_error) {
				$app->log('Unable to connect to mysql: '.$link->connect_error,LOGLEVEL_ERROR);
				return;
			}
			
			//* Get the db host setting for the access priveliges
			if($data['old']['remote_access'] == 'y') {
			 	if($this->process_host_list('DROP', '', $data['old']['database_user'], '', $data['old']['remote_ips'], $link)) {
        	$app->log('Dropping MySQL user: '.$data['old']['database_user'],LOGLEVEL_DEBUG);
				} else {
					$app->log('Error while dropping MySQL user: '.$data['old']['database_user'].' '.$link->error,LOGLEVEL_WARNING);
				}
			}
			$db_host = 'localhost';
			if($link->query("DROP USER '".$link->escape_string($data['old']['database_user'])."'@'$db_host';")) {
				$app->log('Dropping MySQL user: '.$data['old']['database_user'],LOGLEVEL_DEBUG);
			} else {
				$app->log('Error while dropping MySQL user: '.$data['old']['database_user'].' '.mysql_error($link),LOGLEVEL_WARNING);
			}
			
			if($link->query('DROP DATABASE '.$link->escape_string($data['old']['database_name']))) {
				$app->log('Dropping MySQL database: '.$data['old']['database_name'],LOGLEVEL_DEBUG);
			} else {
				$app->log('Error while dropping MySQL database: '.$data['old']['database_name'].' '.mysql_error($link),LOGLEVEL_WARNING);
			}
			
			$link->query('FLUSH PRIVILEGES;');
			$link->close();
		}
		
		
	}
	
	
	

} // end class

?>