<?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;
public function __construct(NodeDefinition $node)
{ $this->node = $node;
} /**
* Marks the expression as being always used. * * @return $this */ public function always(\Closure $then = null)
{ $this->ifPart = function () { 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. * * @return $this */ 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 $this */ public function ifString()
{ $this->ifPart = function ($v) { return \is_string($v); };
return $this;
} /**
* Tests if the value is null. * * @return $this */ public function ifNull()
{ $this->ifPart = function ($v) { return null === $v; };
return $this;
} /**
* Tests if the value is empty. * * @return $this */ public function ifEmpty()
{ $this->ifPart = function ($v) { return empty($v); };
return $this;
} /**
* Tests if the value is an array. * * @return $this */ public function ifArray()
{ $this->ifPart = function ($v) { return \is_array($v); };
return $this;
} /**
* Tests if the value is in an array. * * @return $this */ 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. * * @return $this */ public function ifNotInArray(array $array)
{ $this->ifPart = function ($v) use ($array) { return !\in_array($v, $array, true); };
return $this;
} /**
* Transforms variables of any type into an array. * * @return $this */ public function castToArray()
{ $this->ifPart = function ($v) { return !\is_array($v); };
$this->thenPart = function ($v) { return [$v]; };
return $this;
} /**
* Sets the closure to run if the test pass. * * @return $this */ public function then(\Closure $closure)
{ $this->thenPart = $closure;
return $this;
} /**
* Sets a closure returning an empty array. * * @return $this */ public function thenEmptyArray()
{ $this->thenPart = function () { return []; };
return $this;
} /**
* Sets a closure marking the value as invalid at processing time. * * if you want to add the value of the node in your message just use a %s placeholder. * * @return $this * * @throws \InvalidArgumentException */ public function thenInvalid(string $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 processing time. * * @return $this * * @throws UnsetKeyException */ public function thenUnset()
{ $this->thenPart = function () { throw new UnsetKeyException('Unsetting key.'); };
return $this;
} /**
* Returns the related node. * * @return NodeDefinition|ArrayNodeDefinition|VariableNodeDefinition * * @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 self) {
$if = $expr->ifPart;
$then = $expr->thenPart;
$expressions[$k] = function ($v) use ($if, $then) {
return $if($v) ? $then($v) : $v;
}; } } return $expressions;
}}