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<?php
namespace League\Plates\Extension;
use League\Plates\Engine;
use League\Plates\Template\Template;
use LogicException;
/**
* Extension that adds a number of URI checks.
*/
class URI implements ExtensionInterface
{
/**
* Instance of the current template.
* @var Template
*/
public $template;
/**
* The request URI.
* @var string
*/
protected $uri;
/**
* The request URI as an array.
* @var array
*/
protected $parts;
/**
* Create new URI instance.
* @param string $uri
*/
public function __construct($uri)
{
$this->uri = $uri;
$this->parts = explode('/', $this->uri);
}
/**
* Register extension functions.
* @param Engine $engine
* @return null
*/
public function register(Engine $engine)
{
$engine->registerFunction('uri', array($this, 'runUri'));
}
/**
* Perform URI check.
* @param null|integer|string $var1
* @param mixed $var2
* @param mixed $var3
* @param mixed $var4
* @return mixed
*/
public function runUri($var1 = null, $var2 = null, $var3 = null, $var4 = null)
{
if (is_null($var1)) {
return $this->uri;
}
if (is_numeric($var1) and is_null($var2)) {
return array_key_exists($var1, $this->parts) ? $this->parts[$var1] : null;
}
if (is_numeric($var1) and is_string($var2)) {
return $this->checkUriSegmentMatch($var1, $var2, $var3, $var4);
}
if (is_string($var1)) {
return $this->checkUriRegexMatch($var1, $var2, $var3);
}
throw new LogicException('Invalid use of the uri function.');
}
/**
* Perform a URI segment match.
* @param integer $key
* @param string $string
* @param mixed $returnOnTrue
* @param mixed $returnOnFalse
* @return mixed
*/
protected function checkUriSegmentMatch($key, $string, $returnOnTrue = null, $returnOnFalse = null)
{
if (array_key_exists($key, $this->parts) && $this->parts[$key] === $string) {
return is_null($returnOnTrue) ? true : $returnOnTrue;
}
return is_null($returnOnFalse) ? false : $returnOnFalse;
}
/**
* Perform a regular express match.
* @param string $regex
* @param mixed $returnOnTrue
* @param mixed $returnOnFalse
* @return mixed
*/
protected function checkUriRegexMatch($regex, $returnOnTrue = null, $returnOnFalse = null)
{
if (preg_match('#^' . $regex . '$#', $this->uri) === 1) {
return is_null($returnOnTrue) ? true : $returnOnTrue;
}
return is_null($returnOnFalse) ? false : $returnOnFalse;
}
}