<?php
/*
 *     
 *     404 Error Monitor is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *     
 *     404 Error Monitor is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *    
 *     You should have received a copy of the GNU General Public License
 *     along with 404 Error Monitor.  If not, see <http://www.gnu.org/licenses/gpl-3.0.html>.
 *     
 *     --------------
 *     
 *     Plugin Name: 404 Error Monitor
 *     Plugin URI: http://www.php-geek.fr/plugin-wordpress-404-error-monitor.html
 *     Description: This plugin logs 404 (Page Not Found) errors on your WordPress site. It also logs useful informations like referrer, user address, and error hit count. It is fully compatible with a multisite configuration.
 *     Version: 1.0.3
 *     Author: Bruce Delorme
 *     Author URI: http://www.php-geek.fr
 */


if (!function_exists('is_admin')) {
    header('Status: 403 Forbidden');
    header('HTTP/1.1 403 Forbidden');
    exit();
}

// Pre-2.6 compatibility
if ( ! defined( 'WP_CONTENT_URL' ) )
      define( 'WP_CONTENT_URL', get_option( 'siteurl' ) . '/wp-content' );
if ( ! defined( 'WP_CONTENT_DIR' ) )
      define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
      
      
define( 'ERROR_REPORT_PLUGIN_NAME', '404-error-monitor' );      
define( 'ERROR_REPORT_PLUGIN_DIR', WP_PLUGIN_DIR . '/' . ERROR_REPORT_PLUGIN_NAME );
define( 'ERROR_REPORT_PLUGIN_URL', WP_PLUGIN_URL . '/' . ERROR_REPORT_PLUGIN_NAME );

include_once(ERROR_REPORT_PLUGIN_DIR.'/includes/Error.php');
include_once(ERROR_REPORT_PLUGIN_DIR.'/includes/DataTools.php');

if (!class_exists("errorMonitor")) :

class errorMonitor {

	/**
	 * 
	 * Class constructor
	 */
	function errorMonitor() 
	{	
		
		add_action('admin_init', array(&$this,'init_admin') );
		add_action('init', array(&$this,'init') );
		
		register_activation_hook( __FILE__, array(&$this,'activate') );
		register_deactivation_hook( __FILE__, array(&$this,'deactivate') );
	}
	
	/**
	 * 
	 * Enter description here ...
	 */
	function init() 
	{
		if(is_network_admin()){ //on est dans le network-admin
			add_action( 'network_admin_menu', array(&$this,'add_network_admin_pages'));
		} if(is_admin()) { //on est dans le backoffice du site
			add_action('admin_menu', array(&$this,'add_admin_pages') );
		}else { //on est sur une page 
			add_action( 'wp', array(&$this,'intercept404Errors') );
		}
	}
	
	/**
	 * 
	 * Enter description here ...
	 */
	function init_admin() 
	{

		add_action('wp_ajax_deleteError', array(&$this,'deleteError') );
		add_action('wp_ajax_deleteAllErrors', array(&$this,'deleteBlogErrors') );
		add_action('wp_ajax_deleteBlogErrors', array(&$this,'deleteBlogErrors') );
		add_action('wp_ajax_updatePluginSettings', array(&$this,'updatePluginSettings') );
		$this->enqueueScript('admin.js');
		$this->enqueueStyle('admin.css');
	}
	
	
	/**
	 * 
	 * Enter description here ...
	 * @param unknown_type $fileName
	 */
	function enqueueScript($fileName)
	{
  		wp_enqueue_script( ERROR_REPORT_PLUGIN_NAME, ERROR_REPORT_PLUGIN_URL."/js/".$fileName, array( 'jquery' ) );
	}
	
	function enqueueStyle($fileName)
	{
  		wp_enqueue_style( ERROR_REPORT_PLUGIN_NAME, ERROR_REPORT_PLUGIN_URL."/css/".$fileName );
	}

	function activate($networkwide) {
		global $wpdb;

		errorMonitor_DataTools::addPluginOption('min_hit_count','0');
		errorMonitor_DataTools::addPluginOption('ext_filter','');
		errorMonitor_DataTools::addPluginOption('path_filter','/wp-admin');
		
		if (function_exists('is_multisite') && is_multisite()) {
			// check if it is a network activation - if so, run the activation function for each blog id
			if ($networkwide) {
				$old_blog = $wpdb->blogid;
				// Get all blog ids
				$blogids = $wpdb->get_col($wpdb->prepare("SELECT blog_id FROM $wpdb->blogs"));
				//@todo si nombre de blog trop gros => gerer erreur (shuosin_memory_limit)
				foreach ($blogids as $blog_id) {
					switch_to_blog($blog_id);
					$this->_activate($networkwide);
				}
				switch_to_blog($old_blog);
				return;
			}	
		} 
		$this->_activate($networkwide);	

	}

	function deactivate($networkwide) {
		global $wpdb;
		errorMonitor_DataTools::deletePluginOption('min_hit_count');
		errorMonitor_DataTools::deletePluginOption('ext_filter');
		errorMonitor_DataTools::deletePluginOption('path_filter');
		
		if (function_exists('is_multisite') && is_multisite()) {
			// check if it is a network activation - if so, run the activation function for each blog id
			if ($networkwide) {
				$old_blog = $wpdb->blogid;
				// Get all blog ids
				$blogids = $wpdb->get_col($wpdb->prepare("SELECT blog_id FROM $wpdb->blogs"));
				foreach ($blogids as $blog_id) {
					switch_to_blog($blog_id);
					$this->_deactivate($networkwide);
				}
				switch_to_blog($old_blog);
				return;
			}	
		} 
		$this->_deactivate($networkwide);
	}	
	
	function _activate($networkwide) 
	{
		if($networkwide){
			if(errorMonitor_DataTools::getPluginOption('network-install') == null){
				errorMonitor_DataTools::addPluginOption('network-install',true);
			}
		}
		errorMonitor_DataTools::_createTables($networkwide);
	}
	
	
	function _deactivate($networkwide) 
	{
		//@todo faire msg de warning
		if($networkwide){
			errorMonitor_DataTools::deletePluginOption('network-install');
		}
		errorMonitor_DataTools::_dropTables($networkwide);
	}
	

	function add_admin_pages()
	{
		if(!errorMonitor_DataTools::getPluginOption('network-install')){
			add_menu_page('errorMonitor', '404 Error Monitor', 'administrator', 'errorMonitor', array(&$this,'error_list_page'));
			add_submenu_page('errorMonitor', 'Settings', 'Settings', 'administrator', 'errorMonitorSettings', array(&$this,'add_network_settings'));
		} else {
			add_options_page('errorMonitor','404 Error Monitor', 'administrator', 'errorMonitor', array(&$this,'error_list_page'));
		}
	}
	
	function add_network_admin_pages() {
		if(errorMonitor_DataTools::getPluginOption('network-install')){
			add_menu_page('errorMonitor', '404 Error Monitor', 'administrator', 'errorMonitor', array(&$this,'error_list_page'));
			add_submenu_page('errorMonitor', 'Settings', 'Settings', 'administrator', 'errorMonitorSettings', array(&$this,'add_network_settings'));
		}
	}

	
	function error_list_page() {
		include_once(ERROR_REPORT_PLUGIN_DIR.'/includes/errorList.php');
	}
	
	function add_network_settings() {
		include_once(ERROR_REPORT_PLUGIN_DIR.'/includes/settings.php');
	}
	
	function intercept404Errors()
	{
		if ( function_exists( 'is_404' ) && is_404() ){
			$error = new errorMonitor_Error();
			$error->add($this->curPageURL());
    	}
	}
	
	
	/**
	 * Ajax response
	 */
	function deleteError()
	{
		$error = new errorMonitor_Error();
		
		$errorId = $_POST['id'];
		if($errorId){
			echo $error->delete($errorId);
		}
	}
	
	function deleteBlogErrors()
	{
		$error = new errorMonitor_Error();
		$blogId = $_POST['blog_id'];
		if($blogId){
			echo $error->deleteAll($blogId);
		} else {
			echo $error->deleteAll();
		}
	}
	
	function updatePluginSettings()
	{
		
		$min_hit_count = $_POST['min_hit_count'];
		$ext_filter = $_POST['ext_filter'];
		$path_filterString = $_POST['path_filter'];
		if(!is_numeric($min_hit_count)){
			$min_hit_count = "0";
		}
		$path_filter ='';
		foreach(preg_split("/((\r?\n)|(\r\n?))/", $path_filterString) as $k => $line){
			if($line != ""){
				if($k== 0){
	    			$path_filter = $line;
				} else {
					$path_filter .= ';'.$line;
				}
			}
		} 
		errorMonitor_DataTools::updatePluginOption('min_hit_count',($min_hit_count != '')?$min_hit_count:null);
		errorMonitor_DataTools::updatePluginOption('ext_filter',($ext_filter != '')?$ext_filter:null);
		errorMonitor_DataTools::updatePluginOption('path_filter',($path_filter != '')?$path_filter:null);
		echo true;
	}

	/**
	 * 
	 * Enter description here ...
	 */
	function curPageURL() {
		 $pageURL = 'http';
		 if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
		 $pageURL .= "://";
		 if ($_SERVER["SERVER_PORT"] != "80") {
		  $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
		 } else {
		  $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
		 }
		 return $pageURL;
	}


} // end class
endif;

global $errorMonitor;
if (class_exists("errorMonitor") && !$errorMonitor) {
    $errorMonitor = new errorMonitor();	
}
?>