<?php
/*
 * weathermap5rrd - index.php
 * Copyright (C) 2008 Zdenek Styblik
 * 
 * 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.
 *
 * Authors:
 * Zdenek Styblik ~ 2007-2008
 * Alexandre Fontelle ~ 2005-2006
 * original file: linkgraph.php
 *
 */
class linkgraph extends defaultLib
{
	public $settings;

	function __construct()
 	{
		$this->settings = new StdClass;
		$settings = $this->settings;
		$settings->layout = "linkgraph.xsl";
		$settings->xmlobject = new StdClass;
	}

	public function init()
 	{
		$xml = $this->settings->xmlobject;
		$path = $this->getPath();
		if (isset($_GET['link']) && !empty($_GET['link']))
	 	{
			$linkname = urldecode($_GET['link']);
		} else {
			$xml->error = "Incorrect call to graph.php. Link variable is not defined";
			return;
		}
		if (isset($_GET['config']) && !empty($_GET['config'])) {
			$cfgfile = urldecode($_GET['config']);
		} else {
			$cfgfile = NULL;
		}
		if (isset($_GET['limit']) && $_GET['limit'] == 1) {
			$limit = true;
		} else {
			$limit = false;
		}
		require_once "{$path}lib/configfile.php";
		$configfile = new config_file($cfgfile);
		if ($configfile->readConfig() != false)
	 	{
			$config = $configfile->getConfig();
			$period = "6hours";
			if (isset($config->links) && is_object($config->links))
		 	{
				$links = $config->links;
			}
			else
		 	{
				$xml->error = "no links were defined;";
				return;
			} /* not isset($config->links) */
			if (isset($config->nodes) && is_object($config->nodes))
		 	{
				$nodes = $config->nodes;
			}
			else
		 	{
				$xml->error = "no nodes were defined;";
				return;
			} /* not isset($config->nodes) */
			if (isset($_GET['period']) && !empty($_GET['period']))
				$period = urldecode($_GET["period"]);
			if (isset($_GET['type']) && !empty($_GET['type']))
				$type = urldecode($_GET["type"]);
			if (isset($links->{$linkname}))
		 	{
				$link = $links->{$linkname};
				if (!isset($link->target) && (!isset($link->targetin) && !isset($link->targetout)))
					$xml->error = "link target files not defined";
				if (!isset($link->targetin))
					$link->targetin = $link->target;
				if (!isset($link->targetout))
					$link->targetout = $link->target;
				if (!isset($link->inpos) || !is_numeric($link->inpos))
					$link->inpos = 1;
				if (!isset($link->outpos) || !is_numeric($link->outpos))
					$link->outpos = 2;
				require_once "{$path}lib/rrd.php";
				$rrdtools = new rrdtools();
				if (($rrain = $rrdtools->get_rra_name($link->targetin, $link->inpos)) == NULL)
					$xml->error = 'rrain failed;';
				if (($rraout = $rrdtools->get_rra_name($link->targetout, $link->outpos)) == NULL)
					$xml->error = 'rraout failed;';
				if ($limit == false)
			 	{
					$xml->im[0] = new StdClass;
					$xml->im[0]->name = "img0";
					$xml->im[0]->link = "http://" . $this->getHostname() . dirname($_SERVER['PHP_SELF'])
						. "/graph.php?link={$link->name}&#38;from={$nodes->{$link->to}->name}&#38;to="
						. $nodes->{$link->from}->name . "&#38;rrdin={$link->targetin}&#38;rrdout=" 
				    . $link->targetout . "&#38;inpos={$link->inpos}&#38;outpos=" . $link->outpos
					 	. "&#38;unit={$link->unit}&#38;period=1hour";
					$xml->im[1] = new StdClass;
					$xml->im[1]->name = "img1";
					$xml->im[1]->link = "http://" . $this->getHostname() . dirname($_SERVER['PHP_SELF'])
						. "/graph.php?link={$link->name}&#38;from={$nodes->{$link->to}->name}&#38;to="
						. $nodes->{$link->from}->name . "&#38;rrdin={$link->targetin}&#38;rrdout=" 
						. $link->targetout . "&#38;inpos={$link->inpos}&#38;outpos=" . $link->outpos 
						. "&#38;unit={$link->unit}&#38;period=1day";
					$xml->im[2] = new StdClass;
					$xml->im[2]->name = "img2";
					$xml->im[2]->link = "http://" . $this->getHostname() . dirname($_SERVER['PHP_SELF'])
						. "/graph.php?link={$link->name}&#38;from={$nodes->{$link->to}->name}&#38;to=" 
						. $nodes->{$link->from}->name . "&#38;rrdin={$link->targetin}&#38;rrdout=" 
						. $link->targetout . "&#38;inpos={$link->inpos}&#38;outpos=" . $link->outpos 
						. "&#38;unit={$link->unit}&#38;period=1week";
					$xml->im[3] = new StdClass;
					$xml->im[3]->name = "img3";
					$xml->im[3]->link = "http://" . $this->getHostname() . dirname($_SERVER['PHP_SELF'])
						. "/graph.php?link={$link->name}&#38;from={$nodes->{$link->to}->name}&#38;to=" 
						. $nodes->{$link->from}->name . "&#38;rrdin={$link->targetin}&#38;rrdout=" 
						. $link->targetout . "&#38;inpos={$link->inpos}&#38;outpos=" . $link->outpos 
						. "&#38;unit={$link->unit}&#38;period=1month";
				}
				else
			 	{
					$xml->im[0] = new StdClass;
					$xml->im[0]->name = "img0";
					$xml->im[0]->link = "http://". $this->getHostname() . dirname($_SERVER['PHP_SELF'])
						. "/graph.php?link={$link->name}&#38;from={$nodes->{$link->to}->name}&#38;to="
						. $nodes->{$link->from}->name . "&#38;rrdin={$link->targetin}&#38;rrdout="
						. $link->targetout . "&#38;inpos={$link->inpos}&#38;outpos=" . $link->outpos 
						. "&#38;unit={$link->unit}&#38;period=1hour";
				} /* not $limit */
			}
			else
		 	{
				$xml->error = 'link not set;';
			} /* not isset($links->linkname) */
			return 0;
		}
		else
	 	{
			$xml->error = "config file not found;";
			return 0;
		} /* not $configfile->readConfig() */
	}
}
?>