1 files changed, 101 insertions, 0 deletions
diff --git a/library/Director/CheckPlugin/Range.php b/library/Director/CheckPlugin/Range.php
new file mode 100644
index 0000000..d7b582e
--- /dev/null
+++ b/library/Director/CheckPlugin/Range.php
@@ -0,0 +1,101 @@
+<?php
+
+namespace Icinga\Module\Director\CheckPlugin;
+
+use Icinga\Exception\ConfigurationError;
+
+class Range
+{
+    /** @var float|null */
+    protected $start = 0;
+
+    /** @var float|null */
+    protected $end = null;
+
+    /** @var bool */
+    protected $mustBeWithinRange = true;
+
+    public function __construct($start = 0, $end = null, $mustBeWithinRange = true)
+    {
+        $this->start = $start;
+        $this->end = $end;
+        $this->mustBeWithinRange = $mustBeWithinRange;
+    }
+
+    public function valueIsValid($value)
+    {
+        if ($this->valueIsWithinRange($value)) {
+            return $this->valueMustBeWithinRange();
+        } else {
+            return ! $this->valueMustBeWithinRange();
+        }
+    }
+
+    public function valueIsWithinRange($value)
+    {
+        if ($this->start !== null && $value < $this->start) {
+            return false;
+        }
+        if ($this->end !== null && $value > $this->end) {
+            return false;
+        }
+
+        return true;
+    }
+
+    public function valueMustBeWithinRange()
+    {
+        return $this->mustBeWithinRange;
+    }
+
+    /**
+     * @param $any
+     * @return static
+     */
+    public static function wantRange($any)
+    {
+        if ($any instanceof static) {
+            return $any;
+        } else {
+            return static::parse($any);
+        }
+    }
+
+    /**
+     * @param $string
+     * @return static
+     * @throws ConfigurationError
+     */
+    public static function parse($string)
+    {
+        $string = str_replace(' ', '', $string);
+        $value = '[-+]?[\d\.]+';
+        $valueRe = "$value(?:e$value)?";
+        $regex = "/^(@)?($valueRe|~)(:$valueRe|~)?/";
+        if (! preg_match($regex, $string, $match)) {
+            throw new ConfigurationError('Invalid range definition: %s', $string);
+        }
+
+        $inside = $match[1] === '@';
+
+        if (strlen($match[3]) === 0) {
+            $start = 0;
+            $end = static::parseValue($match[2]);
+        } else {
+            $start = static::parseValue($match[2]);
+            $end = static::parseValue($match[3]);
+        }
+        $range = new static($start, $end, $inside);
+
+        return $range;
+    }
+
+    protected static function parseValue($value)
+    {
+        if ($value === '~') {
+            return null;
+        } else {
+            return $value;
+        }
+    }
+}