Error.php

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<?php
/*-------------------------------------------------------------------------------
 * Xataface Web Application Framework
 * Copyright (C) 2005-2008 Web Lite Solutions Corp (shannah@sfu.ca)
 * 
 * This program 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 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *-------------------------------------------------------------------------------
 */
require_once 'PEAR.php';

define('DATAFACE_ERROR_PERMISSION_DENIED', 10101010);
define('DATAFACE_ERROR_NO_IMPORT_FILTERS_FOUND', 10101011);
define('DATAFACE_ERROR_DUPLICATE_ENTRY', 10101100);

define('DATAFACE_E_NOTICE', 200);
define('DATAFACE_E_PERMMISSIONS', 210);
define('DATAFACE_E_PERMISSION_DENIED', 211);
define('DATAFACE_E_LOGIN_FAILURE', 212);
define('DATAFACE_E_NO_RESULTS', 250);


define('DATAFACE_E_WARNING', 100);
define('DATAFACE_E_NO_IMPORT_FILTERS_FOUND', 111);
define('DATAFACE_E_DUPLICATE_ENTRY', 112);
define('DATAFACE_E_VERSION_MISMATCH', 113);

define('DATAFACE_E_ERROR', 300);
define('DATAFACE_E_IO_ERROR', 320);
define('DATAFACE_E_DELETE_FAILED', 321);
define('DATAFACE_E_WRITE_FAILED', 322);
define('DATAFACE_E_READ_FAILED', 323);
define('DATAFACE_E_NO_TABLE_SPECIFIED', 350);
define('DATAFACE_E_MISSING_KEY', 351);
define('DATAFACE_E_REQUEST_NOT_HANDLED', 201);





class Dataface_Error extends PEAR_Error {

        
        public static function stringRepresentation($arg){
                if ( is_object($arg) ) return get_class($arg).' Object';
                if ( is_array($arg) ) return 'array('.implode(',', array_map(array('Dataface_Error','stringRepresentation'), $arg)).')';
                return strval($arg);
        }
        
        public static function printStackTrace(){
                $debug = debug_backtrace();
                $out = "";
                foreach ($debug as $line){
                        $args = '';
                        if ( isset($line['args']) ){
                                foreach ($line['args'] as $arg){
                                        $args .= substr(Dataface_Error::stringRepresentation($arg), 0, 100).',';
                                }
                        }
                        $args = substr($args,0,strlen($args)-1);
                        $out .= "On line ".@$line['line']." of file ".@$line['file']." in function ".@$line['function']."($args)\n<br>";
                }
                return $out;
        }
        
        public static function permissionDenied($msg="Permission Denied", $userInfo=''){
                if ( !$userInfo ) $userInfo = Dataface_Error::printStackTrace();
                $err = PEAR::raiseError($msg, DATAFACE_E_PERMISSION_DENIED, E_USER_WARNING, null, $userInfo);
                return $err;
        }
        
        public static function isPermissionDenied($obj){
                if ( PEAR::isError($obj) and $obj->getCode() == DATAFACE_E_PERMISSION_DENIED ) return true;
                return false;
        }
        
        public static function noImportFiltersFound($msg="No Import filters found", $userInfo=''){
                if ( !$userInfo ) $userInfo = Dataface_Error::printStackTrace();
                $err = PEAR::raiseError($msg, DATAFACE_E_NO_IMPORT_FILTERS_FOUND, E_USER_WARNING, null, $userInfo);
                return $err;
        
        }
        
        public static function isNoImportFiltersFound($obj){
                if ( PEAR::isError($obj) and $obj->getCode() == DATAFACE_E_NO_IMPORT_FILTERS_FOUND ) return true;
                return false;
        
        }
        
        public static function duplicateEntry($msg="This record already exists", $userInfo=''){
                if ( !$userInfo ) $userInfo = Dataface_Error::printStackTrace();
                $err = PEAR::raiseError($msg, DATAFACE_E_DUPLICATE_ENTRY, E_USER_WARNING, null, $userInfo);
                return $err;
        }
        
        public static function isDuplicateEntry($obj){
                if ( PEAR::isError($obj) and $obj->getCode() == DATAFACE_E_DUPLICATE_ENTRY ) return true;
                return false;
        }
        
        public static function isError($obj){
                if ( !PEAR::isError($obj) ) return false;
                return ($obj->getCode() >= DATAFACE_E_ERROR);
        }
        
        public static function isWarning($obj){
                if ( !PEAR::isError($obj) ) return false;
                return ( $obj->getCode() >= DATAFACE_E_WARNING && $obj->getCode() < DATAFACE_E_NOTICE);
        }
        
        public static function isNotice(&$obj){
                if ( !PEAR::isError($obj) ) return false;
                return ( $obj->getCode() >= DATAFACE_E_NOTICE and $obj->getCode() < DATAFACE_E_ERROR);
                
        }
}