<?php
	/**
	* @class DisplayHandler
	* @author NHN (developers@xpressengine.com)
	*  DisplayHandler is responsible for displaying the execution result. \n
	*  Depending on the request type, it can display either HTML or XML content.\n
	*  Xml content is simple xml presentation of variables in oModule while html content
	*   is the combination of the variables of oModue and template files/.
	**/

	class DisplayHandler extends Handler {

		var $content_size = 0; // /< The size of displaying contents

		var $gz_enabled = false; // / <a flog variable whether to call contents after compressing by gzip
		var $handler = null;

		/**
		 * print either html or xml content given oModule object
		 * @remark addon execution and the trigger execution are included within this method, which might create inflexibility for the fine grained caching
		 * @param ModuleObject $oModule the module object
		 * @return void
		 **/
		function printContent(&$oModule) {
			// Check if the gzip encoding supported
			if(
				(defined('__OB_GZHANDLER_ENABLE__') && __OB_GZHANDLER_ENABLE__ == 1) &&
				strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')!==false &&
				function_exists('ob_gzhandler') &&
				extension_loaded('zlib') &&
				$oModule->gzhandler_enable
			) $this->gz_enabled = true;
			// Extract contents to display by the request method
			if(Context::get('xeVirtualRequestMethod')=='xml') {
				require_once("./classes/display/VirtualXMLDisplayHandler.php");
				$handler = new VirtualXMLDisplayHandler();
			}
			else if(Context::getRequestMethod() == 'XMLRPC') {
				require_once("./classes/display/XMLDisplayHandler.php");
				$handler = new XMLDisplayHandler();
				if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false) $this->gz_enabled = false;
			}
			else if(Context::getRequestMethod() == 'JSON') {
				require_once("./classes/display/JSONDisplayHandler.php");
				$handler = new JSONDisplayHandler();
			}
			else {
				require_once("./classes/display/HTMLDisplayHandler.php");
				$handler = new HTMLDisplayHandler();
			}

			$output = $handler->toDoc($oModule);
			// call a trigger before display
			ModuleHandler::triggerCall('display', 'before', $output);
			// execute add-on
			$called_position = 'before_display_content';
			$oAddonController = &getController('addon');
			$addon_file = $oAddonController->getCacheFilePath(Mobile::isFromMobilePhone()?"mobile":"pc");
			@include($addon_file);

			if(method_exists($handler, "prepareToPrint")) $handler->prepareToPrint($output);
			// header output
			if($this->gz_enabled) header("Content-Encoding: gzip");

			$httpStatusCode = $oModule->getHttpStatusCode();
			if($httpStatusCode && $httpStatusCode != 200) $this->_printHttpStatusCode($httpStatusCode);
			else
			{
				if(Context::getResponseMethod() == 'JSON') $this->_printJSONHeader();
				else if(Context::getResponseMethod() != 'HTML') $this->_printXMLHeader();
				else $this->_printHTMLHeader();
			}

			// debugOutput output
			$this->content_size = strlen($output);
			$output .= $this->_debugOutput();
			// results directly output
			if($this->gz_enabled) print ob_gzhandler($output, 5);
			else print $output;
			// call a trigger after display
			ModuleHandler::triggerCall('display', 'after', $content);
		}


		/**
		 * Print debugging message to designated output source depending on the value set to __DEBUG_OUTPUT_. \n
		 * This method only functions when __DEBUG__ variable is set to 1.
		 * __DEBUG_OUTPUT__ == 0, messages are written in ./files/_debug_message.php
		 * @return void
		 **/
		function _debugOutput() {
			if(!__DEBUG__) return;

			$end = getMicroTime();
			// Firebug console output
			if(__DEBUG_OUTPUT__ == 2 && version_compare(PHP_VERSION, '6.0.0') === -1) {
				static $firephp;
				if(!isset($firephp)) $firephp = FirePHP::getInstance(true);

				if(__DEBUG_PROTECT__ == 1 && __DEBUG_PROTECT_IP__ != $_SERVER['REMOTE_ADDR']) {
					$firephp->fb('Change the value of __DEBUG_PROTECT_IP__ into your IP address in config/config.user.inc.php or config/config.inc.php', 'The IP address is not allowed.');
					return;
				}
				// display total execution time and Request/Response info
				if(__DEBUG__ & 2) {
					$firephp->fb(
						array('Request / Response info >>> '.$_SERVER['REQUEST_METHOD'].' / '.Context::getResponseMethod(),
							array(
								array('Request URI', 'Request method', 'Response method', 'Response contents size'),
								array(
									sprintf("%s:%s%s%s%s", $_SERVER['SERVER_NAME'], $_SERVER['SERVER_PORT'], $_SERVER['PHP_SELF'], $_SERVER['QUERY_STRING']?'?':'', $_SERVER['QUERY_STRING']),
									$_SERVER['REQUEST_METHOD'],
									Context::getResponseMethod(),
									$this->content_size.' byte'
								)
							)
						),
						'TABLE'
					);
					$firephp->fb(
						array('Elapsed time >>> Total : '.sprintf('%0.5f sec', $end - __StartTime__),
							array(array('DB queries', 'class file load', 'Template compile', 'XmlParse compile', 'PHP', 'Widgets', 'Trans Content'),
								array(
									sprintf('%0.5f sec', $GLOBALS['__db_elapsed_time__']),
									sprintf('%0.5f sec', $GLOBALS['__elapsed_class_load__']),
									sprintf('%0.5f sec (%d called)', $GLOBALS['__template_elapsed__'], $GLOBALS['__TemplateHandlerCalled__']),
									sprintf('%0.5f sec', $GLOBALS['__xmlparse_elapsed__']),
									sprintf('%0.5f sec', $end-__StartTime__-$GLOBALS['__template_elapsed__']-$GLOBALS['__xmlparse_elapsed__']-$GLOBALS['__db_elapsed_time__']-$GLOBALS['__elapsed_class_load__']),
									sprintf('%0.5f sec', $GLOBALS['__widget_excute_elapsed__']),
									sprintf('%0.5f sec', $GLOBALS['__trans_content_elapsed__'])
								)
							)
						),
						'TABLE'
					);
				}
				// display DB query history
				if((__DEBUG__ & 4) && $GLOBALS['__db_queries__']) {
					$queries_output = array(array('Query', 'Elapsed time', 'Result'));
					foreach($GLOBALS['__db_queries__'] as $query) {
						array_push($queries_output, array($query['query'], sprintf('%0.5f', $query['elapsed_time']), $query['result']));
					}
					$firephp->fb(
						array(
							'DB Queries >>> '.count($GLOBALS['__db_queries__']).' Queries, '.sprintf('%0.5f sec', $GLOBALS['__db_elapsed_time__']),
							$queries_output
						),
						'TABLE'
					);
				}
			// dislpay the file and HTML comments
			} else {
				// display total execution time and Request/Response info
				if(__DEBUG__ & 2) {
					if(__DEBUG_PROTECT__ == 1 && __DEBUG_PROTECT_IP__ != $_SERVER['REMOTE_ADDR']) {
						return;
					}
					// Request/Response information
					$buff .= "\n- Request/ Response info\n";
					$buff .= sprintf("\tRequest URI \t\t\t: %s:%s%s%s%s\n", $_SERVER['SERVER_NAME'], $_SERVER['SERVER_PORT'], $_SERVER['PHP_SELF'], $_SERVER['QUERY_STRING']?'?':'', $_SERVER['QUERY_STRING']);
					$buff .= sprintf("\tRequest method \t\t\t: %s\n", $_SERVER['REQUEST_METHOD']);
					$buff .= sprintf("\tResponse method \t\t: %s\n", Context::getResponseMethod());
					$buff .= sprintf("\tResponse contents size\t\t: %d byte\n", $this->content_size);
					// total execution time
					$buff .= sprintf("\n- Total elapsed time : %0.5f sec\n", $end-__StartTime__);

					$buff .= sprintf("\tclass file load elapsed time \t: %0.5f sec\n", $GLOBALS['__elapsed_class_load__']);
					$buff .= sprintf("\tTemplate compile elapsed time\t: %0.5f sec (%d called)\n", $GLOBALS['__template_elapsed__'], $GLOBALS['__TemplateHandlerCalled__']);
					$buff .= sprintf("\tXmlParse compile elapsed time\t: %0.5f sec\n", $GLOBALS['__xmlparse_elapsed__']);
					$buff .= sprintf("\tPHP elapsed time \t\t: %0.5f sec\n", $end-__StartTime__-$GLOBALS['__template_elapsed__']-$GLOBALS['__xmlparse_elapsed__']-$GLOBALS['__db_elapsed_time__']-$GLOBALS['__elapsed_class_load__']);
		    $buff .= sprintf("\tDB class elapsed time \t\t: %0.5f sec\n", $GLOBALS['__dbclass_elapsed_time__'] -$GLOBALS['__db_elapsed_time__']);
					// widget execution time
					$buff .= sprintf("\n\tWidgets elapsed time \t\t: %0.5f sec", $GLOBALS['__widget_excute_elapsed__']);
					// layout execution time
					$buff .= sprintf("\n\tLayout compile elapsed time \t: %0.5f sec", $GLOBALS['__layout_compile_elapsed__']);
					// Widgets, the editor component replacement time
					$buff .= sprintf("\n\tTrans Content \t\t\t: %0.5f sec\n", $GLOBALS['__trans_content_elapsed__']);
				}
				// DB Logging
				if(__DEBUG__ & 4) {
					if(__DEBUG_PROTECT__ == 1 && __DEBUG_PROTECT_IP__ != $_SERVER['REMOTE_ADDR']) {
						return;
					}

					if($GLOBALS['__db_queries__']) {
						$buff .= sprintf("\n- DB Queries : %d Queries. %0.5f sec\n", count($GLOBALS['__db_queries__']), $GLOBALS['__db_elapsed_time__']);
						$num = 0;

						foreach($GLOBALS['__db_queries__'] as $query) {
							$buff .= sprintf("\t%02d. %s\n\t\t%0.6f sec. ", ++$num, $query['query'], $query['elapsed_time']);
							if($query['result'] == 'Success') {
								$buff .= "Query Success\n";
							} else {
								$buff .= sprintf("Query $s : %d\n\t\t\t   %s\n", $query['result'], $query['errno'], $query['errstr']);
							}
							$buff .= sprintf("\t\tConnection: %s\n", $query['connection']);
						}
					}
				}
				// Output in HTML comments
				if($buff && __DEBUG_OUTPUT__ == 1 && Context::getResponseMethod() == 'HTML') {
					$buff = sprintf("[%s %s:%d]\n%s\n", date('Y-m-d H:i:s'), $file_name, $line_num, print_r($buff, true));

					if(__DEBUG_PROTECT__ == 1 && __DEBUG_PROTECT_IP__ != $_SERVER['REMOTE_ADDR']) {
						$buff = 'The IP address is not allowed. Change the value of __DEBUG_PROTECT_IP__ into your IP address in config/config.user.inc.php or config/config.inc.php';
					}

					return "<!--\r\n".$buff."\r\n-->";
				}
				// Output to a file
				if($buff && __DEBUG_OUTPUT__ == 0) {
					$debug_file = _XE_PATH_.'files/_debug_message.php';
					$buff = sprintf("[%s %s:%d]\n%s\n", date('Y-m-d H:i:s'), $file_name, $line_num, print_r($buff, true));

					$buff = str_repeat('=', 40)."\n".$buff.str_repeat('-', 40);
					$buff = "\n<?php\n/*".$buff."*/\n?>\n";

					if(@!$fp = fopen($debug_file, 'a')) return;
					fwrite($fp, $buff);
					fclose($fp);
				}
			}
		}

		/**
		 * print a HTTP HEADER for XML, which is encoded in UTF-8
		 * @return void
		 **/
		function _printXMLHeader() {
			header("Content-Type: text/xml; charset=UTF-8");
			header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
			header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
			header("Cache-Control: no-store, no-cache, must-revalidate");
			header("Cache-Control: post-check=0, pre-check=0", false);
			header("Pragma: no-cache");
		}


		/**
		 * print a HTTP HEADER for HTML, which is encoded in UTF-8
		 * @return void
		 **/
		function _printHTMLHeader() {
			header("Content-Type: text/html; charset=UTF-8");
			header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
			header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
			header("Cache-Control: no-store, no-cache, must-revalidate");
			header("Cache-Control: post-check=0, pre-check=0", false);
			header("Pragma: no-cache");
		}


		/**
		 * print a HTTP HEADER for JSON, which is encoded in UTF-8
		 * @return void
		 **/
		function _printJSONHeader() {
			header("Content-Type: text/html; charset=UTF-8");
			header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
			header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
			header("Cache-Control: no-store, no-cache, must-revalidate");
			header("Cache-Control: post-check=0, pre-check=0", false);
			header("Pragma: no-cache");
		}


		/**
		 * print a HTTP HEADER for HTML, which is encoded in UTF-8
		 * @return void
		 **/
		function _printHttpStatusCode($code) {
			$statusMessage = Context::get('http_status_message');
			header("HTTP/1.0 $code $statusMessage");
		}
	}
?>
