<?php
/**
 * Contains the Pivot debug functions.
 *
 * @package pivot
 * @subpackage modules
 */

$logfile = dirname(dirname(__FILE__))."/db/logfile.txt";

/**
 * If called directly, display the debug log.
 */
if (basename( $_SERVER['PHP_SELF'] ) == "module_debug.php"){
	view_log();
}

/**
 * Displays the debug log
 *
 */
function view_log() {
	global $logfile;

	if ((isset($_GET['clear'])) && (file_exists($logfile) )) {
		$fp = fopen($logfile,"w");
		fclose($fp);
		header("location: module_debug.php");
		die();
	}

	echo <<<EOM
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
	<head>
		<title></title>
		<style>

		body {
			font-family: Andale Mono, "Courier New", Courier, monospace;
			font-size: 11px;
			line-height: 13px;
			background-color: #EEE;
			color: #333;
		}

		.timetaken {
			font-size: 10px;
			background-color: #DDD;
			margin: 12px 0px 4px 0px;
		}

		</style>
	</head>

	<body onload="self.focus();">
EOM;

	if (file_exists($logfile)) {
		$file = implode("",file($logfile));

		$file = nl2br(str_replace("  ", "&nbsp; ", $file));
	} else {
		$file = "";
	}
	echo $file;

	echo "<br /><div id='bottom'><a href='javascript:window.location.reload();'>reload</a> - <a href='module_debug.php?clear=1'>clear</a></div>";
	echo "</body>\n</html>\n";

	debug_sep("Viewlog");

}



/**
 * If debug is enabled, this will open the file to which
 * the debug log is written. If the file is "old" it will be
 * reset, otherwise it's opened in append-mode.
 *
 */
function open_debug() {
	global $debug_fp, $Cfg, $logfile;

	if ($Cfg['debug'] == 1) {

		if (file_exists($logfile)) {
			$ch_time = filemtime($logfile);
		} else {
			$ch_time = 0;
		}

		$nu_time = mktime();

		if ( ($nu_time - $ch_time) > 300) {
			// reset the logfile..
			$debug_fp = fopen( $logfile, "w");
		} else {
			// append to the logfile..
			$debug_fp = fopen( $logfile, "a");
		}

		// If we can't write to the debug file we die();
		if (!$debug_fp) {
			echo "Couldn't open logfile ".$logfile." - b0rk!";
			die();
		}
	}
}


/**
 * Prints a line of output to the debug window
 *
 * @param string $output
 */
function debug($output) {
	global $debug_fp, $debug_last, $Cfg;


	if ( $Cfg['debug'] == 1) {


		if (!$debug_fp) {
			open_debug();
		}

		$date = date("Y-m-d H:i:s");

		if(function_exists('memory_get_usage')) {
			$mem = " ( ". memory_get_usage() ." ) ";
		} else {
			$mem = "";
		}


		// fix the filename
		if (function_exists("debug_backtrace")) {
			$backtrace = debug_backtrace();
			$file = basename(dirname($backtrace[0]['file'])). '/' . basename($backtrace[0]['file']);
			$line = $backtrace[0]['line'];
			$function = $backtrace[1]['function'];
		}

		// $output = "<span class='timetaken'> -- ".timetaken()."- ".nl2br(htmlspecialchars($line))." -- $mem</span><br />\n". $output;

		if (function_exists("timetaken")) {
			$timetaken = timetaken();
		} else {
			$timetaken = 0;
		}

		if ( ($file.$function) != $debug_last ) {
			$output = sprintf("<div class='timetaken'>%s - %s -- %s:%s / %s() --  %s </div>%s\n",
						$date, $timetaken, $file, $line, $function, $mem, $output);
			$debug_last = $file.$function;
		} else {
			$output = sprintf("%s\n", $output);
		}

		fwrite( $debug_fp, $output );

	}
}



/**
 * Prints a nice seperator to the debug window
 *
 * @param string $output
 */
function debug_sep($output) {
	global $Cfg;

	if ( $Cfg['debug'] == 1) {

		$sep = "=====================================================================================";

		$len = strlen($output);

		$output = substr($sep, 0, (33 - floor($len / 2)) ) ."  ". trim($output) . "  ". substr($sep, 0, (33 - ceil($len / 2)));

		debug( "<b>".$output."</b>");

	}
}


/**
 * Prints a 'print_r' to the debug window
 *
 * @param string $output
 */
function debug_printr($array) {
	global $Cfg;

	if ($Cfg['debug'] == 1) {

		ob_start();
	    print_r($array);
		$output = ob_get_contents();
		ob_end_clean();

		debug($output);

	}
}



/**
 * Prints an the debug backtrace in readable form to the output window
 *
 */
function debug_printbacktrace() {
	global $db, $Cfg;

	if(!function_exists('debug_backtrace')) {
		debug('function debug_backtrace does not exists');
		return;
	}

	$MAXSTRLEN = 50;

	if ( $Cfg['debug'] == 1)  {

		// fix the filename
		if (!isset($parms['file'])) {
			$backtrace = debug_backtrace();
			$parms['file'] = basename(dirname($backtrace[0]['file'])). '/' . basename($backtrace[0]['file']);
			$parms['line'] = $backtrace[0]['line'];
		}

		ob_start();

		$my_trace = array_reverse(debug_backtrace());

		foreach($my_trace as $t) 	{
			echo '» ';
			if(isset($t['file'])) {
				$line = basename(dirname($t['file'])). '/' .basename($t['file']) .":" . $t['line'];
				printf("%-30s", $line);
			} else {
				// if file was not set, I assumed the functioncall
				// was from PHP compiled source (ie XML-callbacks).
				$line = '<PHP inner-code>';
				printf("%-30s", $line);
			}

			echo ' - ';

			if(isset($t['class'])) echo $t['class'] . $t['type'];

			echo $t['function'];

			if (isset($t['args']) && sizeof($t['args']) > 0) {
				$args= array();
				foreach($t['args'] as $arg) {
					if (is_null($arg)) $args[] = 'null';
					else if (is_array($arg)) $args[] = 'Array['.sizeof($arg).']';
					else if (is_object($arg)) $args[] = 'Object:'.get_class($arg);
					else if (is_bool($arg)) $args[] = $arg ? 'TRUE' : 'FALSE';
					else if ( (is_int($arg))||(is_float($arg)) ) $args[] = $arg;
					else {
						$arg = (string) @$arg;
						$str = htmlspecialchars(substr($arg,0,$MAXSTRLEN));
						$str = str_replace("\n", "", str_replace("\r", "", $str));
						$str = preg_replace("/(\s)/i", " ", $str);
						if (strlen($arg) > $MAXSTRLEN) $str .= '~';

						$args[] = "'".$str."'";
					}
				}

				echo '( ' . implode(" , ", $args) .  ' )';
			}	else {
				echo '()';
			}

			echo "\r\n";
		}

		$output = ob_get_contents();
		ob_end_clean();

		debug($output);
	}
}

function debug_var_dump($var, $maxlevel=2, $level=0) {

	debug_printr(debug_var_dump_helper($var, $maxlevel, $level));

}

function debug_var_dump_helper($var, $maxlevel, $level){

	if(!is_array($var)) {
		return "string: ".strlen($var);
	} else {


		if ($level<$maxlevel) {

			if(count($var)>0) {
				foreach($var as $key => $sub) {
					$res[$key] = debug_var_dump_helper($sub, $maxlevel, ($level+1));
				}
				$res[] = sprintf("total: %s, count: %s",
					debug_var_dump_helper($var, 0, 1),
					count($var)
				);
			} else {
				$res = sprintf("total: %s, count: %s",
					debug_var_dump_helper($var, 0, 1),
					count($var)
				);
			}
		} else if ($level==$maxlevel) {

			$res = sprintf("total: %s, count: %s",
				debug_var_dump_helper($var, 0, 1),
				count($var)
			);
		} else {
			$res = 0;
			foreach($var as $key => $sub) {
				$res += strlen($key) + debug_var_dump_helper($sub, $maxlevel, ($level+1));
			}
		}
		return $res;
	}

}


/**
 * If debug is enabled this function handles the errors and warnings
 *
 * @param integer $errno
 * @param string $errmsg
 * @param string $filename
 * @param integer $linenum
 * @param array $vars
 */
function userErrorHandler ($errno, $errmsg, $filename, $linenum, $vars) {

	 $replevel = error_reporting();
	 if( ( $errno & $replevel ) != $errno )
	 {
	   // we shall remain quiet.
	   return;
	 }

	// define an assoc array of error string
	// in reality the only entries we should
	// consider are 2,8,256,512 and 1024
	$errortype = array (
		1   =>  "Error",
		2   =>  "Warning",
		4   =>  "Parsing Error",
		8   =>  "Notice",
		16  =>  "Core Error",
		32  =>  "Core Warning",
		64  =>  "Compile Error",
		128 =>  "Compile Warning",
		256 =>  "User Error",
		512 =>  "User Warning",
		1024=>  "User Notice"
	);

	// set of errors for which a var trace will be saved
	$filename = basename(dirname($filename)) . "/" . basename( $filename );

	$err = sprintf("<b>%s</b>: %s. (in <em>'%s'</em> on line %s)", $errortype[$errno], $errmsg, $filename, $linenum);

	debug($err);

}

function print_debuglink() {
	global $Cfg;

	if ($Cfg['debug'] == 1) {
		//void(debugwin.location.reload());
$link = "void(debugwin = window.open('includes/modules/module_debug.php#bottom', 'debugwin', 'status=yes, scrollbars=yes, resizable=yes, width=600, height=300')); return false;";
		echo "<small><a href='includes/modules/module_debug.php#bottom' onclick=\"$link\">debug</a></small>";

	} else {

		echo "no";

	}

}


// If debug is set, we set up the custom error handler..
if ( $Cfg['debug'] == 1 ) {
	ini_set("display_errors", "1");
	error_reporting (E_ALL ^ E_NOTICE );
	$old_error_handler = set_error_handler("userErrorHandler");
} else {
	error_reporting( E_ERROR );
}


?>
