mirror of https://github.com/MISP/MISP
46 lines
1.2 KiB
PHP
46 lines
1.2 KiB
PHP
<?php
|
|
class ColourGradientTool
|
|
{
|
|
public function createGradient($step)
|
|
{
|
|
$stepHex = dechex($step);
|
|
$minHex = 0x0000FF;
|
|
$maxHex = 0xFF0000;
|
|
$intervalHex = ($maxHex-$minHex) / $stepHex;
|
|
$colours = array();
|
|
for ($i=$minHex; $i<$maxHex; $i+=$intervalHex) {
|
|
$colours[] = $i;
|
|
}
|
|
return $colours;
|
|
}
|
|
|
|
// $values of the form array(item1: val1, item2: val2, ...)
|
|
public function createGradientFromValues($items)
|
|
{
|
|
if (count($items) == 0) {
|
|
return array();
|
|
}
|
|
|
|
$maxColorHex = 0x0000FF;
|
|
$minColorHex = 0xE0E0FF;
|
|
|
|
$vals = array_values($items);
|
|
$maxDec = max($vals);
|
|
$minDec = min($vals);
|
|
|
|
if ($maxDec == $minDec) {
|
|
$intervalHex = 0x0;
|
|
} else {
|
|
$intervalHex = ($maxColorHex - $minColorHex)/($maxDec-$minDec);
|
|
}
|
|
|
|
$coloursMapping = array();
|
|
foreach ($items as $name => $val) {
|
|
$ratio = ($val-$minDec)*($intervalHex);
|
|
$colour = $maxDec == $minDec ? $maxColorHex : $ratio + $minColorHex;
|
|
$coloursMapping[$name] = '#' . str_pad(dechex($colour), 6, '0', STR_PAD_LEFT);
|
|
}
|
|
return $coloursMapping;
|
|
}
|
|
}
|