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<?php
# Collectd Default type
class Type_Default {
var $datadir;
var $args;
var $seconds;
var $data_sources = array('value');
var $order;
var $ds_names;
var $colors;
var $rrd_title;
var $rrd_vertical;
var $rrd_format;
var $scale;
var $width;
var $heigth;
var $files;
var $tinstances;
var $identifiers;
function __construct($datadir) {
$this->datadir = $datadir;
$this->parse_get();
$this->rrd_files();
$this->identifiers = $this->file2identifier($this->files);
}
# parse $_GET values
function parse_get() {
$this->args = array(
'host' => $_GET['h'],
'plugin' => $_GET['p'],
'pinstance' => $_GET['pi'],
'type' => $_GET['t'],
'tinstance' => $_GET['ti'],
);
$this->seconds = $_GET['s'];
}
function validate_color($color) {
if (!preg_match('/^[0-9a-f]{6}$/', $color))
return '000000';
else
return $color;
}
function get_faded_color($fgc, $bgc='ffffff', $percent=0.25) {
$fgc = $this->validate_color($fgc);
if (!is_numeric($percent))
$percent=0.25;
$rgb = array('r', 'g', 'b');
$fg[r] = hexdec(substr($fgc,0,2));
$fg[g] = hexdec(substr($fgc,2,2));
$fg[b] = hexdec(substr($fgc,4,2));
$bg[r] = hexdec(substr($bgc,0,2));
$bg[g] = hexdec(substr($bgc,2,2));
$bg[b] = hexdec(substr($bgc,4,2));
foreach ($rgb as $pri) {
$c[$pri] = dechex(round($percent * $fg[$pri]) + ((1.0 - $percent) * $bg[$pri]));
if ($c[$pri] == '0')
$c[$pri] = '00';
}
return $c[r].$c[g].$c[b];
}
function rrd_files() {
$files = $this->get_filenames();
foreach($files as $filename) {
preg_match("#^$this->datadir/{$this->args['host']}/[\w\d]+-?([\w\d-]+)?/[\w\d]+-?([\w\d-]+)?\.rrd#", $filename, $matches);
$this->tinstances[] = $matches[2];
$this->files[$matches[2]] = $filename;
}
sort($this->tinstances);
ksort($this->files);
}
function get_filenames() {
$identifier = sprintf('%s/%s%s%s/%s%s%s', $this->args['host'],
$this->args['plugin'], strlen($this->args['pinstance']) ? '-' : '', $this->args['pinstance'],
$this->args['type'], strlen($this->args['tinstance']) ? '-' : '', $this->args['tinstance']);
$wildcard = strlen($this->args['tinstance']) ? '' : '*';
$files = glob($this->datadir .'/'. $identifier . $wildcard . '.rrd');
return $files;
}
function file2identifier($files) {
foreach($files as $key => $file) {
if (is_file($file)) {
$files[$key] = preg_replace("#^$this->datadir/#", '', $files[$key]);
$files[$key] = preg_replace('#\.rrd$#', '', $files[$key]);
}
}
return $files;
}
function rrd_graph($debug=false) {
$graphdata = $this->rrd_gen_graph();
if(!$debug) {
# caching
header("Expires: " . date(DATE_RFC822,strtotime("90 seconds")));
header("content-type: image/png");
$graphdata = implode(' ', $graphdata);
echo `$graphdata`;
} else {
print '<pre>';
print_r($graphdata);
print '</pre>';
}
}
function rrd_options() {
$rrdgraph[] = '/usr/bin/rrdtool graph - -a PNG';
$rrdgraph[] = sprintf('-w %d', is_numeric($this->width) ? $this->width : 400);
$rrdgraph[] = sprintf('-h %d', is_numeric($this->heigth) ? $this->heigth : 175);
$rrdgraph[] = '-l 0';
$rrdgraph[] = sprintf('-t "%s on %s"', $this->rrd_title, $this->args['host']);
$rrdgraph[] = sprintf('-v "%s"', $this->rrd_vertical);
$rrdgraph[] = sprintf('-s -%d', is_numeric($this->seconds) ? $this->seconds : 86400);
return $rrdgraph;
}
function rrd_get_sources() {
# is the source spread over multiple files?
if (is_array($this->files) && count($this->files)>1) {
# and must it be ordered?
if (is_array($this->order)) {
$this->tinstances = array_intersect($this->order, $this->tinstances);
}
# use tinstances as sources
$sources = $this->tinstances;
}
# or one file with multiple data_sources
else {
# use data_sources as sources
$sources = $this->data_sources;
}
return $sources;
}
function rrd_gen_graph() {
$rrdgraph = $this->rrd_options();
$sources = $this->rrd_get_sources();
$i=0;
foreach ($this->tinstances as $tinstance) {
foreach ($this->data_sources as $ds) {
$rrdgraph[] = sprintf('DEF:min_%s=%s:%s:MIN', $sources[$i], $this->files[$tinstance], $ds);
$rrdgraph[] = sprintf('DEF:avg_%s=%s:%s:AVERAGE', $sources[$i], $this->files[$tinstance], $ds);
$rrdgraph[] = sprintf('DEF:max_%s=%s:%s:MAX', $sources[$i], $this->files[$tinstance], $ds);
$i++;
}
}
if(count($this->files)<=1) {
foreach ($sources as $source) {
$rrdgraph[] = sprintf('AREA:max_%s#%s', $source, $this->get_faded_color($this->colors[$source]));
$rrdgraph[] = sprintf('AREA:min_%s#%s', $source, 'ffffff');
break; # only 1 area to draw
}
}
foreach ($sources as $source) {
$dsname = $this->ds_names[$source] != '' ? $this->ds_names[$source] : $source;
$color = is_array($this->colors) ? $this->colors[$source]: $this->colors;
$rrdgraph[] = sprintf('LINE1:avg_%s#%s:\'%s\'', $source, $this->validate_color($color), $dsname);
$rrdgraph[] = sprintf('GPRINT:min_%s:MIN:\'%s Min,\'', $source, $this->rrd_format);
$rrdgraph[] = sprintf('GPRINT:avg_%s:AVERAGE:\'%s Avg,\'', $source, $this->rrd_format);
$rrdgraph[] = sprintf('GPRINT:max_%s:MAX:\'%s Max,\'', $source, $this->rrd_format);
$rrdgraph[] = sprintf('GPRINT:avg_%s:LAST:\'%s Last\\l\'', $source, $this->rrd_format);
}
return $rrdgraph;
}
}
?>
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