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<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Twig\Util;
use Twig\Error\SyntaxError;
use Twig\Node\Expression\ArrayExpression;
use Twig\Node\Expression\ConstantExpression;
use Twig\Node\Expression\VariadicExpression;
use Twig\Node\Node;
use Twig\TwigCallableInterface;
/**
* @author Fabien Potencier <[email protected]>
*
* @internal
*/
final class CallableArgumentsExtractor
{
private ReflectionCallable $rc;
public function __construct(
private Node $node,
private TwigCallableInterface $twigCallable,
) {
$this->rc = new ReflectionCallable($twigCallable);
}
/**
* @return array<Node>
*/
public function extractArguments(Node $arguments): array
{
$extractedArguments = [];
$named = false;
foreach ($arguments as $name => $node) {
if (!\is_int($name)) {
$named = true;
$name = $this->normalizeName($name);
} elseif ($named) {
throw new SyntaxError(\sprintf('Positional arguments cannot be used after named arguments for %s "%s".', $this->twigCallable->getType(), $this->twigCallable->getName()), $this->node->getTemplateLine(), $this->node->getSourceContext());
}
$extractedArguments[$name] = $node;
}
if (!$named && !$this->twigCallable->isVariadic()) {
$min = $this->twigCallable->getMinimalNumberOfRequiredArguments();
if (\count($extractedArguments) < $this->rc->getReflector()->getNumberOfRequiredParameters() - $min) {
throw new SyntaxError(\sprintf('Value for argument "%s" is required for %s "%s".', $this->rc->getReflector()->getParameters()[$min + \count($extractedArguments)]->getName(), $this->twigCallable->getType(), $this->twigCallable->getName()), $this->node->getTemplateLine(), $this->node->getSourceContext());
}
return $extractedArguments;
}
if (!$callable = $this->twigCallable->getCallable()) {
if ($named) {
throw new SyntaxError(\sprintf('Named arguments are not supported for %s "%s".', $this->twigCallable->getType(), $this->twigCallable->getName()));
}
throw new SyntaxError(\sprintf('Arbitrary positional arguments are not supported for %s "%s".', $this->twigCallable->getType(), $this->twigCallable->getName()));
}
[$callableParameters, $isPhpVariadic] = $this->getCallableParameters();
$arguments = [];
$names = [];
$missingArguments = [];
$optionalArguments = [];
$pos = 0;
foreach ($callableParameters as $callableParameter) {
$name = $this->normalizeName($callableParameter->name);
if (\PHP_VERSION_ID >= 80000 && 'range' === $callable) {
if ('start' === $name) {
$name = 'low';
} elseif ('end' === $name) {
$name = 'high';
}
}
$names[] = $name;
if (\array_key_exists($name, $extractedArguments)) {
if (\array_key_exists($pos, $extractedArguments)) {
throw new SyntaxError(\sprintf('Argument "%s" is defined twice for %s "%s".', $name, $this->twigCallable->getType(), $this->twigCallable->getName()), $this->node->getTemplateLine(), $this->node->getSourceContext());
}
if (\count($missingArguments)) {
throw new SyntaxError(\sprintf(
'Argument "%s" could not be assigned for %s "%s(%s)" because it is mapped to an internal PHP function which cannot determine default value for optional argument%s "%s".',
$name, $this->twigCallable->getType(), $this->twigCallable->getName(), implode(', ', $names), \count($missingArguments) > 1 ? 's' : '', implode('", "', $missingArguments)
), $this->node->getTemplateLine(), $this->node->getSourceContext());
}
$arguments = array_merge($arguments, $optionalArguments);
$arguments[] = $extractedArguments[$name];
unset($extractedArguments[$name]);
$optionalArguments = [];
} elseif (\array_key_exists($pos, $extractedArguments)) {
$arguments = array_merge($arguments, $optionalArguments);
$arguments[] = $extractedArguments[$pos];
unset($extractedArguments[$pos]);
$optionalArguments = [];
++$pos;
} elseif ($callableParameter->isDefaultValueAvailable()) {
$optionalArguments[] = new ConstantExpression($callableParameter->getDefaultValue(), $this->node->getTemplateLine());
} elseif ($callableParameter->isOptional()) {
if (!$extractedArguments) {
break;
}
$missingArguments[] = $name;
} else {
throw new SyntaxError(\sprintf('Value for argument "%s" is required for %s "%s".', $name, $this->twigCallable->getType(), $this->twigCallable->getName()), $this->node->getTemplateLine(), $this->node->getSourceContext());
}
}
if ($this->twigCallable->isVariadic()) {
$arbitraryArguments = $isPhpVariadic ? new VariadicExpression([], $this->node->getTemplateLine()) : new ArrayExpression([], $this->node->getTemplateLine());
foreach ($extractedArguments as $key => $value) {
if (\is_int($key)) {
$arbitraryArguments->addElement($value);
} else {
$arbitraryArguments->addElement($value, new ConstantExpression($key, $this->node->getTemplateLine()));
}
unset($extractedArguments[$key]);
}
if ($arbitraryArguments->count()) {
$arguments = array_merge($arguments, $optionalArguments);
$arguments[] = $arbitraryArguments;
}
}
if ($extractedArguments) {
$unknownArgument = null;
foreach ($extractedArguments as $extractedArgument) {
if ($extractedArgument instanceof Node) {
$unknownArgument = $extractedArgument;
break;
}
}
throw new SyntaxError(
\sprintf(
'Unknown argument%s "%s" for %s "%s(%s)".',
\count($extractedArguments) > 1 ? 's' : '', implode('", "', array_keys($extractedArguments)), $this->twigCallable->getType(), $this->twigCallable->getName(), implode(', ', $names)
),
$unknownArgument ? $unknownArgument->getTemplateLine() : $this->node->getTemplateLine(),
$unknownArgument ? $unknownArgument->getSourceContext() : $this->node->getSourceContext()
);
}
return $arguments;
}
private function normalizeName(string $name): string
{
return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], $name));
}
private function getCallableParameters(): array
{
$parameters = $this->rc->getReflector()->getParameters();
if ($this->node->hasNode('node')) {
array_shift($parameters);
}
if ($this->twigCallable->needsCharset()) {
array_shift($parameters);
}
if ($this->twigCallable->needsEnvironment()) {
array_shift($parameters);
}
if ($this->twigCallable->needsContext()) {
array_shift($parameters);
}
foreach ($this->twigCallable->getArguments() as $argument) {
array_shift($parameters);
}
$isPhpVariadic = false;
if ($this->twigCallable->isVariadic()) {
$argument = end($parameters);
$isArray = $argument && $argument->hasType() && $argument->getType() instanceof \ReflectionNamedType && 'array' === $argument->getType()->getName();
if ($isArray && $argument->isDefaultValueAvailable() && [] === $argument->getDefaultValue()) {
array_pop($parameters);
} elseif ($argument && $argument->isVariadic()) {
array_pop($parameters);
$isPhpVariadic = true;
} else {
throw new SyntaxError(\sprintf('The last parameter of "%s" for %s "%s" must be an array with default value, eg. "array $arg = []".', $this->rc->getName(), $this->twigCallable->getType(), $this->twigCallable->getName()));
}
}
return [$parameters, $isPhpVariadic];
}
}