<?php
/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * This layout outputs events in a HTML document.
 *
 * ## Configurable parameters: ##
 * 
 * - **title** - the HTML <title>
 * - **locationInfo** - If set to true, logs the file name and line number at 
 *   which the log statement originated. Slightly slower, defaults to false.
 * 
 * @package log4php
 * @subpackage layouts
 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
 * @link http://logging.apache.org/log4php/docs/layouts/html.html Layout documentation
 */
class LoggerLayoutHtml extends LoggerLayout {
	/**
	 * Whether to log location information (file and line number).
	 * @var boolean
	 */
	protected $locationInfo = false;
	
	/** 
	 * The title of the HTML document. 
	 * @var string
	 */
	protected $title = "Log4php Log Messages";
	
	/**
	 * Sets the 'locationInfo' parameter.
	 * @param boolean $locationInfo
	 */
	public function setLocationInfo($locationInfo) {
		$this->setBoolean('locationInfo', $locationInfo);
	}

	/**
	 * Returns the value of the 'locationInfo' parameter.
	 */
	public function getLocationInfo() {
		return $this->locationInfo;
	}
	
	/**
	 * Sets the 'title' parameter.
	 * @param string $title
	 */
	public function setTitle($title) {
		$this->setString('title', $title);
	}

	/**
	 * Returns the value of the 'title' parameter.
	 * @return string
	 */
	public function getTitle() {
		return $this->title;
	}
	
	/**
	 * @return string Returns the content type output by this layout, i.e "text/html".
	 */
	public function getContentType() {
		return "text/html";
	}
	
	/**
	 * @param LoggerLoggingEvent $event
	 * @return string
	 */
	public function format(LoggerLoggingEvent $event) {
		$sbuf = PHP_EOL . "<tr>" . PHP_EOL;
	
		$sbuf .= "<td>";
		$sbuf .= round(1000 * $event->getRelativeTime());
		$sbuf .= "</td>" . PHP_EOL;
	
		$sbuf .= "<td title=\"" . $event->getThreadName() . " thread\">";
		$sbuf .= $event->getThreadName();
		$sbuf .= "</td>" . PHP_EOL;
	
		$sbuf .= "<td title=\"Level\">";
		
		$level = $event->getLevel();
		
		if ($level->equals(LoggerLevel::getLevelDebug())) {
			$sbuf .= "<font color=\"#339933\">$level</font>";
		} else if ($level->equals(LoggerLevel::getLevelWarn())) {
			$sbuf .= "<font color=\"#993300\"><strong>$level</strong></font>";
		} else {
			$sbuf .= $level;
		}
		$sbuf .= "</td>" . PHP_EOL;
	
		$sbuf .= "<td title=\"" . htmlentities($event->getLoggerName(), ENT_QUOTES) . " category\">";
		$sbuf .= htmlentities($event->getLoggerName(), ENT_QUOTES);
		$sbuf .= "</td>" . PHP_EOL;
	
		if ($this->locationInfo) {
			$locInfo = $event->getLocationInformation();
			$sbuf .= "<td>";
			$sbuf .= htmlentities($locInfo->getFileName(), ENT_QUOTES). ':' . $locInfo->getLineNumber();
			$sbuf .= "</td>" . PHP_EOL;
		}

		$sbuf .= "<td title=\"Message\">";
		$sbuf .= htmlentities($event->getRenderedMessage(), ENT_QUOTES);
		$sbuf .= "</td>" . PHP_EOL;

		$sbuf .= "</tr>" . PHP_EOL;
		
		if ($event->getNDC() != null) {
			$sbuf .= "<tr><td bgcolor=\"#EEEEEE\" style=\"font-size : xx-small;\" colspan=\"6\" title=\"Nested Diagnostic Context\">";
			$sbuf .= "NDC: " . htmlentities($event->getNDC(), ENT_QUOTES);
			$sbuf .= "</td></tr>" . PHP_EOL;
		}
		return $sbuf;
	}

	/**
	 * @return string Returns appropriate HTML headers.
	 */
	public function getHeader() {
		$sbuf = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">" . PHP_EOL;
		$sbuf .= "<html>" . PHP_EOL;
		$sbuf .= "<head>" . PHP_EOL;
		$sbuf .= "<title>" . $this->title . "</title>" . PHP_EOL;
		$sbuf .= "<style type=\"text/css\">" . PHP_EOL;
		$sbuf .= "<!--" . PHP_EOL;
		$sbuf .= "body, table {font-family: arial,sans-serif; font-size: x-small;}" . PHP_EOL;
		$sbuf .= "th {background: #336699; color: #FFFFFF; text-align: left;}" . PHP_EOL;
		$sbuf .= "-->" . PHP_EOL;
		$sbuf .= "</style>" . PHP_EOL;
		$sbuf .= "</head>" . PHP_EOL;
		$sbuf .= "<body bgcolor=\"#FFFFFF\" topmargin=\"6\" leftmargin=\"6\">" . PHP_EOL;
		$sbuf .= "<hr size=\"1\" noshade>" . PHP_EOL;
		$sbuf .= "Log session start time " . strftime('%c', time()) . "<br>" . PHP_EOL;
		$sbuf .= "<br>" . PHP_EOL;
		$sbuf .= "<table cellspacing=\"0\" cellpadding=\"4\" border=\"1\" bordercolor=\"#224466\" width=\"100%\">" . PHP_EOL;
		$sbuf .= "<tr>" . PHP_EOL;
		$sbuf .= "<th>Time</th>" . PHP_EOL;
		$sbuf .= "<th>Thread</th>" . PHP_EOL;
		$sbuf .= "<th>Level</th>" . PHP_EOL;
		$sbuf .= "<th>Category</th>" . PHP_EOL;
		if ($this->locationInfo) {
			$sbuf .= "<th>File:Line</th>" . PHP_EOL;
		}
		$sbuf .= "<th>Message</th>" . PHP_EOL;
		$sbuf .= "</tr>" . PHP_EOL;

		return $sbuf;
	}

	/**
	 * @return string Returns the appropriate HTML footers.
	 */
	public function getFooter() {
		$sbuf = "</table>" . PHP_EOL;
		$sbuf .= "<br>" . PHP_EOL;
		$sbuf .= "</body></html>";

		return $sbuf;
	}
}