/
ExprBuilder.php
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/
ExprBuilder.php
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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
{
public const TYPE_ANY = 'any';
public const TYPE_STRING = 'string';
public const TYPE_NULL = 'null';
public const TYPE_ARRAY = 'array';
public string $allowedTypes;
public ?\Closure $ifPart = null;
public ?\Closure $thenPart = null;
public function __construct(
protected NodeDefinition $node,
) {
}
/**
* Marks the expression as being always used.
*
* @return $this
*/
public function always(?\Closure $then = null): static
{
$this->ifPart = static fn () => true;
$this->allowedTypes = self::TYPE_ANY;
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): static
{
$this->ifPart = $closure ?? static fn ($v) => true === $v;
$this->allowedTypes = self::TYPE_ANY;
return $this;
}
/**
* Tests if the value is a string.
*
* @return $this
*/
public function ifString(): static
{
$this->ifPart = \is_string(...);
$this->allowedTypes = self::TYPE_STRING;
return $this;
}
/**
* Tests if the value is null.
*
* @return $this
*/
public function ifNull(): static
{
$this->ifPart = \is_null(...);
$this->allowedTypes = self::TYPE_NULL;
return $this;
}
/**
* Tests if the value is empty.
*
* @return $this
*/
public function ifEmpty(): static
{
$this->ifPart = static fn ($v) => !$v;
$this->allowedTypes = self::TYPE_ANY;
return $this;
}
/**
* Tests if the value is an array.
*
* @return $this
*/
public function ifArray(): static
{
$this->ifPart = \is_array(...);
$this->allowedTypes = self::TYPE_ARRAY;
return $this;
}
/**
* Tests if the value is in an array.
*
* @return $this
*/
public function ifInArray(array $array): static
{
$this->ifPart = static fn ($v) => \in_array($v, $array, true);
$this->allowedTypes = self::TYPE_ANY;
return $this;
}
/**
* Tests if the value is not in an array.
*
* @return $this
*/
public function ifNotInArray(array $array): static
{
$this->ifPart = static fn ($v) => !\in_array($v, $array, true);
$this->allowedTypes = self::TYPE_ANY;
return $this;
}
/**
* Transforms variables of any type into an array.
*
* @return $this
*/
public function castToArray(): static
{
$this->ifPart = static fn ($v) => !\is_array($v);
$this->allowedTypes = self::TYPE_ANY;
$this->thenPart = static fn ($v) => [$v];
return $this;
}
/**
* Sets the closure to run if the test pass.
*
* @return $this
*/
public function then(\Closure $closure): static
{
$this->thenPart = $closure;
return $this;
}
/**
* Sets a closure returning an empty array.
*
* @return $this
*/
public function thenEmptyArray(): static
{
$this->thenPart = static fn () => [];
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): static
{
$this->thenPart = static fn ($v) => 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(): static
{
$this->thenPart = static fn () => throw new UnsetKeyException('Unsetting key.');
return $this;
}
/**
* Returns the related node.
*
* @throws \RuntimeException
*/
public function end(): NodeDefinition|ArrayNodeDefinition|VariableNodeDefinition
{
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
*/
public static function buildExpressions(array $expressions): array
{
foreach ($expressions as $k => $expr) {
if ($expr instanceof self) {
$if = $expr->ifPart;
$then = $expr->thenPart;
$expressions[$k] = static fn ($v) => $if($v) ? $then($v) : $v;
}
}
return $expressions;
}
}