<?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 != $app->dbmaster->dbHost) {
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$sql = "SELECT * FROM sys_datalog WHERE datalog_id > ".$conf['last_datalog_id']." AND (server_id = ".$conf["server_id"]." OR server_id = 0) ORDER BY datalog_id";
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$records = $app->dbmaster->queryAllRecords($sql);
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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(utf8_encode(stripslashes($d["data"])))) {
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$data = unserialize(utf8_encode($d["data"]));
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}
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//** Decode data back to locale
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foreach($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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$replication_error = false;
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$this->current_datalog_id = $d["datalog_id"];
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if(count($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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$tmp_sql2 = '';
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foreach($data['new'] as $fieldname => $val) {
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$tmp_sql1 .= "`$fieldname`,";
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$tmp_sql2 .= "'$val',";
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}
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$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 $d[dbtable] ($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($sql);
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if($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: " . $sql,LOGLEVEL_ERROR);
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}
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$app->log("Replicated from master: ".$sql,LOGLEVEL_DEBUG);
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}
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/*
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if($d["action"] == 'u') {
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$sql = "UPDATE $d[dbtable] SET ";
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foreach($data['new'] as $fieldname => $val) {
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$sql .= "`$fieldname` = '$val',";
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}
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$sql = substr($sql,0,-1);
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$idx = explode(":",$d["dbidx"]);
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$sql .= " WHERE $idx[0] = $idx[1]";
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$app->db->query($sql);
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if($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: " . $sql,LOGLEVEL_ERROR);
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}
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$app->log("Replicated from master: ".$sql,LOGLEVEL_DEBUG);
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}
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*/
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if($d["action"] == 'd') {
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$idx = explode(":",$d["dbidx"]);
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$sql = "DELETE FROM $d[dbtable] ";
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$sql .= " WHERE $idx[0] = $idx[1]";
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$app->db->query($sql);
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if($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: " . $sql,LOGLEVEL_ERROR);
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}
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$app->log("Replicated from master: ".$sql,LOGLEVEL_DEBUG);
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}
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if($replication_error == false) {
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$this->raiseTableHook($d["dbtable"],$d["action"],$data);
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//$app->dbmaster->query("DELETE FROM sys_datalog WHERE datalog_id = ".$d["datalog_id"]);
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//$app->log("Deleting sys_datalog ID ".$d["datalog_id"],LOGLEVEL_DEBUG);
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$app->dbmaster->query("UPDATE server SET updated = ".$d["datalog_id"]." WHERE server_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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$app->log("Datalog does not conatin any changes for this record ".$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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$sql = "SELECT * FROM sys_datalog WHERE datalog_id > ".$conf['last_datalog_id']." AND (server_id = ".$conf["server_id"]." OR server_id = 0) ORDER BY datalog_id";
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$records = $app->db->queryAllRecords($sql);
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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(utf8_encode(stripslashes($d["data"])))) {
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$data = unserialize(utf8_encode($d["data"]));
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}
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//** decode data back to current locale
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foreach($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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$this->current_datalog_id = $d["datalog_id"];
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$this->raiseTableHook($d["dbtable"],$d["action"],$data);
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//$app->db->query("DELETE FROM sys_datalog WHERE datalog_id = ".$rec["datalog_id"]);
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//$app->log("Deleting sys_datalog ID ".$rec["datalog_id"],LOGLEVEL_DEBUG);
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$app->db->query("UPDATE server SET updated = ".$d["datalog_id"]." WHERE server_id = ".$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 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 = $hook["function"];
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// Claa the processing function of the module
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if($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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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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