icingaweb2-module-businessprocess/application/views/scripts/process/history.phtml

<?php
$months = array(
	'Jänner',
	'Februar',
	'März',
	'April',
	'Mai',
	'Juni',
	'Juli',
	'August',
	'September',
	'Oktober',
	'November',
	'Dezember',
);
?><table style="width: 100%;">
<tr>
<th style="width: 10%;">&nbsp;</th>
<? for ($i = 1; $i <= 12; $i++): ?>
<th style="width: 7.5%; border: 1px solid black;"><?= $months[$i - 1] ?></th>
<? endfor ?>
</tr>
</table>

<div style="overflow: auto">
<table>
<tr>
<? for ($i = 1; $i <= 12; $i++): ?>
<td style="border-right: 1px solid black;"><div style="width: 600px; height: 1px; overflow: hidden;">&nbsp;</div><?= $months[$i - 1] ?></td>
<? endfor ?>
</tr>
</table>
</div>

<div style="overflow: auto; ">
<?php

function stateColor($state)
{
	switch($state) {
		case 0:
			$color = '#0f0';
			break;
		case 1:
			$color = 'orange';
			break;
		case 2:
			$color = '#f00';
			break;
		default: // und case 3
			$color = '#ccc';
	}
	return $color;
}

$next_color = null;
$color = null;

$start = mktime(0, 0, 0, 0, 0, (int) date('Y'));
$current_offset = $start;
$htm = '';
$cnt = 0;
$last_host = null;
$last_service = null;
foreach ($this->history as $entry) {
if ($entry->hostname !== $last_host || $entry->service !== $last_service) {

echo '<span style="clear: both;" />' . "\n";
}
$cnt++;
if ($cnt > 10000) break;
	$duration = $entry->timestamp - $current_offset;
	if ($next_color === null) {
		$color = stateColor($entry->last_state);
	} else {
		$color = $next_color;
	}
	$next_color = stateColor($entry->state);

	if ($entry->state == 0) {
		$offset = ceil($duration / 3600 / 6);
	} else {
		$offset = floor($duration / 3600 / 6);
	}
	echo '<div style="overflow: hidden; height: 10px; float: left; width: ' . $offset . 'px; background-color:' . $color . ';">&nbsp;</div>';
	$current_offset += $duration;
	
	$last_host = $entry->hostname;
$last_service = $entry->service;

}


?></div>