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<?php
/* Icinga DB Web | (c) 2021 Icinga GmbH | GPLv2 */
namespace Icinga\Module\Icingadb\Util;
/**
* The warning/critical threshold of a measured value
*/
class ThresholdRange
{
/**
* The smallest value inside the range (null stands for -∞)
*
* @var float|null
*/
protected $min;
/**
* The biggest value inside the range (null stands for ∞)
*
* @var float|null
*/
protected $max;
/**
* Whether to invert the result of contains()
*
* @var bool
*/
protected $inverted = false;
/**
* The unmodified range as passed to fromString()
*
* @var string
*/
protected $raw;
/**
* Create a new instance based on a threshold range conforming to <https://nagios-plugins.org/doc/guidelines.html>
*
* @param string $rawRange
*
* @return ThresholdRange
*/
public static function fromString(string $rawRange): self
{
$range = new static();
$range->raw = $rawRange;
if ($rawRange == '') {
return $range;
}
$rawRange = ltrim($rawRange);
if (substr($rawRange, 0, 1) === '@') {
$range->setInverted();
$rawRange = substr($rawRange, 1);
}
if (strpos($rawRange, ':') === false) {
$min = 0.0;
$max = floatval(trim($rawRange));
} else {
list($min, $max) = explode(':', $rawRange, 2);
$min = trim($min);
$max = trim($max);
switch ($min) {
case '':
$min = 0.0;
break;
case '~':
$min = null;
break;
default:
$min = floatval($min);
}
$max = empty($max) ? null : floatval($max);
}
return $range->setMin($min)
->setMax($max);
}
/**
* Set the smallest value inside the range (null stands for -∞)
*
* @param float|null $min
*
* @return $this
*/
public function setMin(float $min): self
{
$this->min = $min;
return $this;
}
/**
* Get the smallest value inside the range (null stands for -∞)
*
* @return float|null
*/
public function getMin()
{
return $this->min;
}
/**
* Set the biggest value inside the range (null stands for ∞)
*
* @param float|null $max
*
* @return $this
*/
public function setMax(float $max): self
{
$this->max = $max;
return $this;
}
/**
* Get the biggest value inside the range (null stands for ∞)
*
* @return float|null
*/
public function getMax()
{
return $this->max;
}
/**
* Set whether to invert the result of contains()
*
* @param bool $inverted
*
* @return $this
*/
public function setInverted(bool $inverted = true): self
{
$this->inverted = $inverted;
return $this;
}
/**
* Get whether to invert the result of contains()
*
* @return bool
*/
public function isInverted(): bool
{
return $this->inverted;
}
/**
* Return whether $value is inside $this
*
* @param float $value
*
* @return bool
*/
public function contains(float $value): bool
{
return (bool) ($this->inverted ^ (
($this->min === null || $this->min <= $value) && ($this->max === null || $this->max >= $value)
));
}
/**
* Return the textual representation of $this, suitable for fromString()
*
* @return string
*/
public function __toString()
{
return (string) $this->raw;
}
}
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