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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Config\Definition\Builder;
use Symfony\Component\Config\Definition\Exception\UnsetKeyException;
/**
* This class builds an if expression.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
* @author Christophe Coevoet <stof@notk.org>
*/
class ExprBuilder
{
protected $node;
public $ifPart;
public $thenPart;
/**
* Constructor.
*
* @param NodeDefinition $node The related node
*/
public function __construct(NodeDefinition $node)
{
$this->node = $node;
}
/**
* Marks the expression as being always used.
*
* @param \Closure $then
*
* @return ExprBuilder
*/
public function always(\Closure $then = null)
{
$this->ifPart = function ($v) { return true; };
if (null !== $then) {
$this->thenPart = $then;
}
return $this;
}
/**
* Sets a closure to use as tests.
*
* The default one tests if the value is true.
*
* @param \Closure $closure
*
* @return ExprBuilder
*/
public function ifTrue(\Closure $closure = null)
{
if (null === $closure) {
$closure = function ($v) { return true === $v; };
}
$this->ifPart = $closure;
return $this;
}
/**
* Tests if the value is a string.
*
* @return ExprBuilder
*/
public function ifString()
{
$this->ifPart = function ($v) { return is_string($v); };
return $this;
}
/**
* Tests if the value is null.
*
* @return ExprBuilder
*/
public function ifNull()
{
$this->ifPart = function ($v) { return null === $v; };
return $this;
}
/**
* Tests if the value is an array.
*
* @return ExprBuilder
*/
public function ifArray()
{
$this->ifPart = function ($v) { return is_array($v); };
return $this;
}
/**
* Tests if the value is in an array.
*
* @param array $array
*
* @return ExprBuilder
*/
public function ifInArray(array $array)
{
$this->ifPart = function ($v) use ($array) { return in_array($v, $array, true); };
return $this;
}
/**
* Tests if the value is not in an array.
*
* @param array $array
*
* @return ExprBuilder
*/
public function ifNotInArray(array $array)
{
$this->ifPart = function ($v) use ($array) { return !in_array($v, $array, true); };
return $this;
}
/**
* Sets the closure to run if the test pass.
*
* @param \Closure $closure
*
* @return ExprBuilder
*/
public function then(\Closure $closure)
{
$this->thenPart = $closure;
return $this;
}
/**
* Sets a closure returning an empty array.
*
* @return ExprBuilder
*/
public function thenEmptyArray()
{
$this->thenPart = function ($v) { return array(); };
return $this;
}
/**
* Sets a closure marking the value as invalid at validation time.
*
* if you want to add the value of the node in your message just use a %s placeholder.
*
* @param string $message
*
* @return ExprBuilder
*
* @throws \InvalidArgumentException
*/
public function thenInvalid($message)
{
$this->thenPart = function ($v) use ($message) {throw new \InvalidArgumentException(sprintf($message, json_encode($v))); };
return $this;
}
/**
* Sets a closure unsetting this key of the array at validation time.
*
* @return ExprBuilder
*
* @throws UnsetKeyException
*/
public function thenUnset()
{
$this->thenPart = function ($v) { throw new UnsetKeyException('Unsetting key'); };
return $this;
}
/**
* Returns the related node.
*
* @return NodeDefinition
*
* @throws \RuntimeException
*/
public function end()
{
if (null === $this->ifPart) {
throw new \RuntimeException('You must specify an if part.');
}
if (null === $this->thenPart) {
throw new \RuntimeException('You must specify a then part.');
}
return $this->node;
}
/**
* Builds the expressions.
*
* @param ExprBuilder[] $expressions An array of ExprBuilder instances to build
*
* @return array
*/
public static function buildExpressions(array $expressions)
{
foreach ($expressions as $k => $expr) {
if ($expr instanceof ExprBuilder) {
$if = $expr->ifPart;
$then = $expr->thenPart;
$expressions[$k] = function ($v) use ($if, $then) {
return $if($v) ? $then($v) : $v;
};
}
}
return $expressions;
}
}
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