<?php
/**
 * custom error handler with debugger support
 *
 * @author gERD Schaufelberger <gerd@exit0.net>
 * @copyright 2004 by http://wombat.exit0.net
 * @package wombatSite
 * @subpackage error
 */
 
/**
 *  gsErrorHandler
 * - supports patError
 *
 * @version 0.1
 * @package wombatSite
 * @subpackage error
 */
class wbErrorHandler
{
   /**
    * store debug backtrace
	* @var int $_debug 
    */
	var	$_backtrace	=	null;
	
   /**
    * store operation mode
	* @var int $_debug 
    */
	var	$_debug	=	false;
	
   /**
    * message to be displayed on exit
	* @var int $_dieMessage
    */
	var	$_dieMessage	=	"Due to technical problems, this page cannot be displayed.\nSorry for any inconvinience";
	
   /**
    * handle php errors
	*
	* @access private
	* @param int $no
	* @param string $str 
	* @param string $file 
	* @param int $line
	* @see set_error_handler()
	*/
    function handlePhpError( $no, $str, $file, $line )
    {
		$level	=	'';
		switch( $no )
		{
			case E_ERROR;
			case E_USER_ERROR;
				$level	=	'Error';
				break;
				
			case E_WARNING;
			case E_USER_WARNING;
				$level	=	'Warning';
				break;
				
			case E_NOTICE;
			case E_USER_NOTICE;
				$level	=	'Notice';
				break;
				
			default:
				$level	=	'unknown error';
				break;
		}
				
		if( wbDebugger::isActive() )
		{
			$msg	=	sprintf( '%s [file: %s, line: %s]', $str, $file, $line );		
			wbDebugger::addMsg( $level, $msg, 'PHP-Error' );
		
			if( function_exists( 'debug_backtrace' ) ) 
			{
				$this->_backtrace	=	debug_backtrace();
				$this->_addBacktrace2Debugger( $level, 'PHP-Error' );
			}
		}
		
		if( $no == E_USER_ERROR || $no == E_ERROR )
		{
			if( wbDebugger::isActive() )
			{
				wbDebugger::printMsg();
			}
			echo $this->_dieMessage;
			exit( 1 );
		}
    }
	
   /**
    * handle patError Level: Error
	*
	* @access private
	* @param object $err patError-object
	* @param int $type E_ERROR (default), E_WARNING, E_NOTICE
	* @return boolean $result true on success
	*/
    function handlePatError( &$err, $type = E_ERROR )
    {
		if( wbDebugger::isActive() )
		{
			$level	=	patErrorManager::translateErrorLevel( $err->getLevel() );
			$msg	=	sprintf( '%s [file: %s, line %s]', $err->getInfo(), $err->getFile(), $err->getLine());
			
			wbDebugger::addMsg( $level, $err->getMessage(), $err->getCode() );
			wbDebugger::addMsg( $level, $msg, '+++Info' );
		}
		
		$this->_backtrace	=	$err->getBacktrace();
		$this->_addBacktrace2Debugger( $level, $err->getMessage(), 'pat' );
		
		switch( $type )
		{
			case E_ERROR:
				if( wbDebugger::isActive() )
				{
					wbDebugger::printMsg();
				}
				
				echo wbDebugger::sprint( $this->_dieMessage );
				exit( 1 );
				break;
				
			case E_WARNING:
			case E_NOTICE:
				break;
		}
		
		return $err;
    }
	
   /**
    * handle patError Level: Warning
	*
	* @access private
	* @param object $err patError-object
	* @return boolean $result true on success
	*/
    function handlePatWarning( &$err )
    {
	    return $this->handlePatError( $err, E_WARNING );
    }
	
   /**
    * handle patError Level: Notice
	*
	* @access private
	* @param object $err patError-object
	* @return boolean $result true on success
	* @uses handlePatError()
	*/
    function handlePatNotice( $err )
    {
	    return $this->handlePatError( $err, E_NOTICE );
    }
	
   /**
    * add backtrace messages to debugger
	*
	* @access private
	* @return boolean $result true on success
	*/
    function _addBacktrace2Debugger( $level, $title, $src = 'php' )
    {
		$j	=	1;
		for( $i = count( $this->_backtrace ) - 1; $i > 0; --$i )
		{
			$title		=	sprintf( '>>>%03d', $j );
			$file		=	'NA';
			$type		=	'NA';
			$line		=	'NA';
			$class		=	'NA';
			$function	=	'NA';
			// $args		=	array();

			if( isset( $this->_backtrace[$i]['class'] ) )
				$class	=	$this->_backtrace[$i]['class'];
				
			if( strtolower( $class ) === 'paterrormanager' || strtolower( $class ) === 'paterror' )
			{
				continue;
			}
			
			if( isset( $this->_backtrace[$i]['file'] ) )
				$file		=	$this->_backtrace[$i]['file'];
			if( isset( $this->_backtrace[$i]['line'] ) )
				$line		=	$this->_backtrace[$i]['line'];
			if( isset( $this->_backtrace[$i]['function'] ) )
				$function	=	$this->_backtrace[$i]['function'];
			if( isset( $this->_backtrace[$i]['type'] ) )
				$type		=	$this->_backtrace[$i]['type'];
			
			/*
			if( isset( $this->_backtrace[$i]['args'] ) )
			{
				$args		=	$this->_backtrace[$i]['args'];
			}
			*/ 
			
			$msg	=	sprintf( 'File: %s, line: %s, class: %s, type: %s, function: %s'
							, $file
							, $line
							, $class
							, $type
							, $function 
						);
			wbDebugger::addMsg( $level, $msg, $title );
			++$j;
		}
			
        return true;
    }

}
?>