<?php
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/*
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Copyright (c) 2007 - 2009, Till Brehm, projektfarm Gmbh
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of ISPConfig nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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class modules {
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var $notification_hooks = array();
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var $current_datalog_id = 0;
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var $debug = false;
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/*
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This function is called to load the modules from the mods-enabled or the mods-core folder
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*/
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function loadModules($type) {
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global $app, $conf;
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$subPath = 'mods-enabled';
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if ($type == 'core') $subPath = 'mods-core';
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$modules_dir = $conf['rootpath'].$conf['fs_div'].$subPath.$conf['fs_div'];
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if (is_dir($modules_dir)) {
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if ($dh = opendir($modules_dir)) {
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while (($file = readdir($dh)) !== false) {
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if($file != '.' && $file != '..' && substr($file, -8, 8) == '.inc.php') {
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$module_name = substr($file, 0, -8);
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include_once $modules_dir.$file;
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if($this->debug) $app->log('Loading Module: '.$module_name, LOGLEVEL_DEBUG);
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$app->loaded_modules[$module_name] = new $module_name;
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$app->loaded_modules[$module_name]->onLoad();
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}
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}
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}
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} else {
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$app->log('Modules directory missing: '.$modules_dir, LOGLEVEL_ERROR);
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}
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}
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/*
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This function is called by the modules to register for a specific
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table change notification
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*/
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function registerTableHook($table_name, $module_name, $function_name) {
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global $app;
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$this->notification_hooks[$table_name][] = array('module' => $module_name, 'function' => $function_name);
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if($this->debug) $app->log("Registered TableHook '$table_name' in module '$module_name' for processing function '$function_name'", LOGLEVEL_DEBUG);
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}
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/*
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This function goes through all new records in the
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sys_datalog table and and calls the function in the
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modules that hooked on to the table change.
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*/
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function processDatalog() {
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global $app, $conf;
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//* If its a multiserver setup
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if($app->db->dbHost != $app->dbmaster->dbHost || ($app->db->dbHost == $app->dbmaster->dbHost && $app->db->dbName != $app->dbmaster->dbName)) {
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if($conf['mirror_server_id'] > 0) {
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$sql = "SELECT * FROM sys_datalog WHERE datalog_id > ? AND (server_id = ? OR server_id = ? OR server_id = 0) ORDER BY datalog_id LIMIT 0,1000";
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} else {
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$sql = "SELECT * FROM sys_datalog WHERE datalog_id > ? AND (server_id = ? OR server_id = 0) ORDER BY datalog_id LIMIT 0,1000";
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}
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$records = $app->dbmaster->queryAllRecords($sql, $conf['last_datalog_id'], $conf['server_id'], $conf['mirror_server_id']);
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foreach($records as $d) {
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//** encode data to utf-8 and unserialize it
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if(!$data = unserialize(stripslashes($d['data']))) {
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$data = unserialize($d['data']);
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}
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//** Decode data back to locale
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/*
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foreach($data['old'] as $key => $val) {
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$data['old'][$key] = utf8_decode($val);
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}
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foreach($data['new'] as $key => $val) {
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$data['new'][$key] = utf8_decode($val);
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}
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*/
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$replication_error = false;
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$data['mirrored'] = false;
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$this->current_datalog_id = $d['datalog_id'];
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/*
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* If we are in a mirror setup, rewrite the server_id of records that originally
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* belonged to the mirrored server to the local server_id
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*/
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if($conf['mirror_server_id'] > 0 && $d['dbtable'] != 'server') {
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if(isset($data['new']['server_id']) && $data['new']['server_id'] == $conf['mirror_server_id']) {
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$data['new']['server_id'] = $conf['server_id'];
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$data['mirrored'] = true;
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}
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if(isset($data['old']['server_id']) && $data['old']['server_id'] == $conf['mirror_server_id']) {
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$data['old']['server_id'] = $conf['server_id'];
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$data['mirrored'] = true;
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}
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}
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if(count($data['new']) > 0) {
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if($d['action'] == 'i' || $d['action'] == 'u') {
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$idx = explode(':', $d['dbidx']);
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$tmp_sql1 = '';
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$tmp_sql2 = '';
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$f_params = array($d['dbtable']);
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$params = array();
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foreach($data['new'] as $fieldname => $val) {
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$tmp_sql1 .= "??,";
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$tmp_sql2 .= "?,";
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$f_params[] = $fieldname;
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$params[] = $val;
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}
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$params = array_merge($f_params, $params);
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unset($f_params);
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$tmp_sql1 = substr($tmp_sql1, 0, -1);
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$tmp_sql2 = substr($tmp_sql2, 0, -1);
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//$tmp_sql1 .= "$idx[0]";
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//$tmp_sql2 .= "$idx[1]";
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$sql = "REPLACE INTO ?? ($tmp_sql1) VALUES ($tmp_sql2)";
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$app->db->errorNumber = 0;
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$app->db->errorMessage = '';
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$app->db->query($sql, true, $params);
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if($app->db->errorNumber > 0) {
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$replication_error = true;
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$app->log("Replication failed. Error: (" . $d['dbtable'] . ") in MySQL server: (".$app->db->dbHost.") " . $app->db->errorMessage . " # SQL: " . $sql, LOGLEVEL_ERROR);
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}
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$log = $app->db->_build_query_string($sql, true, $params);
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$app->log('Replicated from master: '.$log, LOGLEVEL_DEBUG);
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unset($params);
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unset($log);
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}
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if($d['action'] == 'd') {
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$idx = explode(':', $d['dbidx']);
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$sql = "DELETE FROM ?? ";
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$sql .= " WHERE ?? = ?";
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$app->db->query($sql, $d['dbtable'], $idx[0], $idx[1]);
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if($app->db->errorNumber > 0) {
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$replication_error = true;
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$app->log("Replication failed. Error: (" . $d[dbtable] . ") " . $app->db->errorMessage . " # SQL: " . $sql, LOGLEVEL_ERROR);
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}
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$log = $app->db->_build_query_string($sql, $d['dbtable'], $idx[0], $idx[1]);
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$app->log('Replicated from master: '.$log, LOGLEVEL_DEBUG);
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unset($log);
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}
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if($replication_error == false) {
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if(is_array($data['old']) || is_array($data['new'])) {
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$app->db->query("UPDATE server SET updated = ? WHERE server_id = ?", $d["datalog_id"], $conf['server_id']);
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$this->raiseTableHook($d['dbtable'], $d['action'], $data);
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} else {
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$app->log('Data array was empty for datalog_id '.$d['datalog_id'], LOGLEVEL_WARN);
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}
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$app->dbmaster->query("UPDATE server SET updated = ? WHERE server_id = ?", $d["datalog_id"], $conf['server_id']);
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$app->log('Processed datalog_id '.$d['datalog_id'], LOGLEVEL_DEBUG);
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} else {
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$app->log('Error in Replication, changes were not processed.', LOGLEVEL_ERROR);
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/*
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* If there is any error in processing the datalog we can't continue, because
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* we do not know if the newer actions require this (old) one.
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*/
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return;
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}
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} else {
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$app->log('Datalog does not contain any changes for this record '.$d['datalog_id'], LOGLEVEL_DEBUG);
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}
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}
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//* if we have a single server setup
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} else {
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$sql = "SELECT * FROM sys_datalog WHERE datalog_id > ? AND (server_id = ? OR server_id = 0) ORDER BY datalog_id LIMIT 0,1000";
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$records = $app->db->queryAllRecords($sql, $conf['last_datalog_id'], $conf['server_id']);
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foreach($records as $d) {
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//** encode data to utf-8 to be able to unserialize it and then unserialize it
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if(!$data = unserialize(stripslashes($d['data']))) {
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$data = unserialize($d['data']);
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}
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//* Data on a single server is never mirrored
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$data['mirrored'] = false;
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$this->current_datalog_id = $d['datalog_id'];
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if(is_array($data['old']) || is_array($data['new'])) {
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$this->raiseTableHook($d['dbtable'], $d['action'], $data);
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} else {
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$app->log('Data array was empty for datalog_id '.$d['datalog_id'], LOGLEVEL_WARN);
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}
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$app->db->query("UPDATE server SET updated = ? WHERE server_id = ?", $d['datalog_id'], $conf['server_id']);
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$app->log('Processed datalog_id '.$d['datalog_id'], LOGLEVEL_DEBUG);
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}
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}
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}
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function processActions() {
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global $app, $conf;
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//* get the server_id of the local server
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$server_id = intval($conf["server_id"]);
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include_once SCRIPT_PATH."/lib/remote_action.inc.php";
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//* SQL query to get all pending actions
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$sql = "SELECT action_id, action_type, action_param " .
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"FROM sys_remoteaction " .
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"WHERE server_id = ? ".
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" AND action_id > ? ".
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"ORDER BY action_id";
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$actions = $app->dbmaster->queryAllRecords($sql, $server_id, $maxid_remote_action);
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if(is_array($actions)) {
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foreach($actions as $action) {
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//* Raise the action
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$state = $app->plugins->raiseAction($action['action_type'], $action['action_param']);
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//* Update the action state
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$sql = "UPDATE sys_remoteaction " .
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"SET action_state = ? " .
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"WHERE action_id = ?";
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$app->dbmaster->query($sql, $state, $action['action_id']);
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/*
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* Then save the maxid for the next time...
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*/
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$fp = fopen(ISPC_LIB_PATH."/remote_action.inc.php", 'wb');
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$content = '<?php' . "\n" . '$maxid_remote_action = ' . $action['action_id'] . ';' . "\n?>";
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fwrite($fp, $content);
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fclose($fp);
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}
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}
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}
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function raiseTableHook($table_name, $action, $data) {
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global $app;
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// Get the hooks for this table
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$hooks = (isset($this->notification_hooks[$table_name]))?$this->notification_hooks[$table_name]:'';
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if($this->debug) $app->log("Raised TableHook for table: '$table_name'", LOGLEVEL_DEBUG);
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if(is_array($hooks)) {
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foreach($hooks as $hook) {
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$module_name = $hook['module'];
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$function_name = $hook['function'];
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// Call the processing function of the module
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if($this->debug) $app->log("Call function '$function_name' in module '$module_name' raised by TableHook '$table_name'.", LOGLEVEL_DEBUG);
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// call_user_method($function_name,$app->loaded_modules[$module_name],$table_name,$action,$data);
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call_user_func(array($app->loaded_modules[$module_name], $function_name), $table_name, $action, $data);
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unset($module_name);
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unset($function_name);
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}
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}
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unset($hook);
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unset($hooks);
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}
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}
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?>
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