<?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;
use Twig\Error\RuntimeError;
use Twig\ExpressionParser\ExpressionParsers;
use Twig\ExpressionParser\Infix\BinaryOperatorExpressionParser;
use Twig\ExpressionParser\InfixAssociativity;
use Twig\ExpressionParser\InfixExpressionParserInterface;
use Twig\ExpressionParser\PrecedenceChange;
use Twig\ExpressionParser\Prefix\UnaryOperatorExpressionParser;
use Twig\Extension\AttributeExtension;
use Twig\Extension\ExtensionInterface;
use Twig\Extension\GlobalsInterface;
use Twig\Extension\LastModifiedExtensionInterface;
use Twig\Extension\StagingExtension;
use Twig\Node\Expression\AbstractExpression;
use Twig\NodeVisitor\NodeVisitorInterface;
use Twig\TokenParser\TokenParserInterface;
/**
* @author Fabien Potencier <fabien@symfony.com>
*
* @internal
*/
final class ExtensionSet
{
private $extensions;
private $initialized = false;
private $runtimeInitialized = false;
private $staging;
private $parsers;
private $visitors;
/** @var array<string, TwigFilter> */
private $filters;
/** @var array<string, TwigFilter> */
private $dynamicFilters;
/** @var array<string, TwigTest> */
private $tests;
/** @var array<string, TwigTest> */
private $dynamicTests;
/** @var array<string, TwigFunction> */
private $functions;
/** @var array<string, TwigFunction> */
private $dynamicFunctions;
private ExpressionParsers $expressionParsers;
/** @var array<string, mixed>|null */
private $globals;
/** @var array<callable(string): (TwigFunction|false)> */
private $functionCallbacks = [];
/** @var array<callable(string): (TwigFilter|false)> */
private $filterCallbacks = [];
/** @var array<callable(string): (TokenParserInterface|false)> */
private $parserCallbacks = [];
private $lastModified = 0;
public function __construct()
{
$this->staging = new StagingExtension();
}
/**
* @return void
*/
public function initRuntime()
{
$this->runtimeInitialized = true;
}
public function hasExtension(string $class): bool
{
return isset($this->extensions[ltrim($class, '\\')]);
}
public function getExtension(string $class): ExtensionInterface
{
$class = ltrim($class, '\\');
if (!isset($this->extensions[$class])) {
throw new RuntimeError(\sprintf('The "%s" extension is not enabled.', $class));
}
return $this->extensions[$class];
}
/**
* @param ExtensionInterface[] $extensions
*/
public function setExtensions(array $extensions): void
{
foreach ($extensions as $extension) {
$this->addExtension($extension);
}
}
/**
* @return ExtensionInterface[]
*/
public function getExtensions(): array
{
return $this->extensions;
}
public function getSignature(): string
{
return json_encode(array_keys($this->extensions));
}
public function isInitialized(): bool
{
return $this->initialized || $this->runtimeInitialized;
}
public function getLastModified(): int
{
if (0 !== $this->lastModified) {
return $this->lastModified;
}
$lastModified = 0;
foreach ($this->extensions as $extension) {
if ($extension instanceof LastModifiedExtensionInterface) {
$lastModified = max($extension->getLastModified(), $lastModified);
} else {
$r = new \ReflectionObject($extension);
if (is_file($r->getFileName())) {
$lastModified = max(filemtime($r->getFileName()), $lastModified);
}
}
}
return $this->lastModified = $lastModified;
}
public function addExtension(ExtensionInterface $extension): void
{
if ($extension instanceof AttributeExtension) {
$class = $extension->getClass();
} else {
$class = $extension::class;
}
if ($this->initialized) {
throw new \LogicException(\sprintf('Unable to register extension "%s" as extensions have already been initialized.', $class));
}
if (isset($this->extensions[$class])) {
throw new \LogicException(\sprintf('Unable to register extension "%s" as it is already registered.', $class));
}
$this->extensions[$class] = $extension;
}
public function addFunction(TwigFunction $function): void
{
if ($this->initialized) {
throw new \LogicException(\sprintf('Unable to add function "%s" as extensions have already been initialized.', $function->getName()));
}
$this->staging->addFunction($function);
}
/**
* @return TwigFunction[]
*/
public function getFunctions(): array
{
if (!$this->initialized) {
$this->initExtensions();
}
return $this->functions;
}
public function getFunction(string $name): ?TwigFunction
{
if (!$this->initialized) {
$this->initExtensions();
}
if (isset($this->functions[$name])) {
return $this->functions[$name];
}
foreach ($this->dynamicFunctions as $pattern => $function) {
if (preg_match($pattern, $name, $matches)) {
array_shift($matches);
return $function->withDynamicArguments($name, $function->getName(), $matches);
}
}
foreach ($this->functionCallbacks as $callback) {
if (false !== $function = $callback($name)) {
return $function;
}
}
return null;
}
/**
* @param callable(string): (TwigFunction|false) $callable
*/
public function registerUndefinedFunctionCallback(callable $callable): void
{
$this->functionCallbacks[] = $callable;
}
public function addFilter(TwigFilter $filter): void
{
if ($this->initialized) {
throw new \LogicException(\sprintf('Unable to add filter "%s" as extensions have already been initialized.', $filter->getName()));
}
$this->staging->addFilter($filter);
}
/**
* @return TwigFilter[]
*/
public function getFilters(): array
{
if (!$this->initialized) {
$this->initExtensions();
}
return $this->filters;
}
public function getFilter(string $name): ?TwigFilter
{
if (!$this->initialized) {
$this->initExtensions();
}
if (isset($this->filters[$name])) {
return $this->filters[$name];
}
foreach ($this->dynamicFilters as $pattern => $filter) {
if (preg_match($pattern, $name, $matches)) {
array_shift($matches);
return $filter->withDynamicArguments($name, $filter->getName(), $matches);
}
}
foreach ($this->filterCallbacks as $callback) {
if (false !== $filter = $callback($name)) {
return $filter;
}
}
return null;
}
/**
* @param callable(string): (TwigFilter|false) $callable
*/
public function registerUndefinedFilterCallback(callable $callable): void
{
$this->filterCallbacks[] = $callable;
}
public function addNodeVisitor(NodeVisitorInterface $visitor): void
{
if ($this->initialized) {
throw new \LogicException('Unable to add a node visitor as extensions have already been initialized.');
}
$this->staging->addNodeVisitor($visitor);
}
/**
* @return NodeVisitorInterface[]
*/
public function getNodeVisitors(): array
{
if (!$this->initialized) {
$this->initExtensions();
}
return $this->visitors;
}
public function addTokenParser(TokenParserInterface $parser): void
{
if ($this->initialized) {
throw new \LogicException('Unable to add a token parser as extensions have already been initialized.');
}
$this->staging->addTokenParser($parser);
}
/**
* @return TokenParserInterface[]
*/
public function getTokenParsers(): array
{
if (!$this->initialized) {
$this->initExtensions();
}
return $this->parsers;
}
public function getTokenParser(string $name): ?TokenParserInterface
{
if (!$this->initialized) {
$this->initExtensions();
}
if (isset($this->parsers[$name])) {
return $this->parsers[$name];
}
foreach ($this->parserCallbacks as $callback) {
if (false !== $parser = $callback($name)) {
return $parser;
}
}
return null;
}
/**
* @param callable(string): (TokenParserInterface|false) $callable
*/
public function registerUndefinedTokenParserCallback(callable $callable): void
{
$this->parserCallbacks[] = $callable;
}
/**
* @return array<string, mixed>
*/
public function getGlobals(): array
{
if (null !== $this->globals) {
return $this->globals;
}
$globals = [];
foreach ($this->extensions as $extension) {
if (!$extension instanceof GlobalsInterface) {
continue;
}
$globals = array_merge($globals, $extension->getGlobals());
}
if ($this->initialized) {
$this->globals = $globals;
}
return $globals;
}
public function resetGlobals(): void
{
$this->globals = null;
}
public function addTest(TwigTest $test): void
{
if ($this->initialized) {
throw new \LogicException(\sprintf('Unable to add test "%s" as extensions have already been initialized.', $test->getName()));
}
$this->staging->addTest($test);
}
/**
* @return TwigTest[]
*/
public function getTests(): array
{
if (!$this->initialized) {
$this->initExtensions();
}
return $this->tests;
}
public function getTest(string $name): ?TwigTest
{
if (!$this->initialized) {
$this->initExtensions();
}
if (isset($this->tests[$name])) {
return $this->tests[$name];
}
foreach ($this->dynamicTests as $pattern => $test) {
if (preg_match($pattern, $name, $matches)) {
array_shift($matches);
return $test->withDynamicArguments($name, $test->getName(), $matches);
}
}
return null;
}
public function getExpressionParsers(): ExpressionParsers
{
if (!$this->initialized) {
$this->initExtensions();
}
return $this->expressionParsers;
}
private function initExtensions(): void
{
$this->parsers = [];
$this->filters = [];
$this->functions = [];
$this->tests = [];
$this->dynamicFilters = [];
$this->dynamicFunctions = [];
$this->dynamicTests = [];
$this->visitors = [];
$this->expressionParsers = new ExpressionParsers();
foreach ($this->extensions as $extension) {
$this->initExtension($extension);
}
$this->initExtension($this->staging);
// Done at the end only, so that an exception during initialization does not mark the environment as initialized when catching the exception
$this->initialized = true;
}
private function initExtension(ExtensionInterface $extension): void
{
// filters
foreach ($extension->getFilters() as $filter) {
$this->filters[$name = $filter->getName()] = $filter;
if (str_contains($name, '*')) {
$this->dynamicFilters['#^'.str_replace('\\*', '(.*?)', preg_quote($name, '#')).'$#'] = $filter;
}
}
// functions
foreach ($extension->getFunctions() as $function) {
$this->functions[$name = $function->getName()] = $function;
if (str_contains($name, '*')) {
$this->dynamicFunctions['#^'.str_replace('\\*', '(.*?)', preg_quote($name, '#')).'$#'] = $function;
}
}
// tests
foreach ($extension->getTests() as $test) {
$this->tests[$name = $test->getName()] = $test;
if (str_contains($name, '*')) {
$this->dynamicTests['#^'.str_replace('\\*', '(.*?)', preg_quote($name, '#')).'$#'] = $test;
}
}
// token parsers
foreach ($extension->getTokenParsers() as $parser) {
if (!$parser instanceof TokenParserInterface) {
throw new \LogicException('getTokenParsers() must return an array of \Twig\TokenParser\TokenParserInterface.');
}
$this->parsers[$parser->getTag()] = $parser;
}
// node visitors
foreach ($extension->getNodeVisitors() as $visitor) {
$this->visitors[] = $visitor;
}
// expression parsers
if (method_exists($extension, 'getExpressionParsers')) {
$this->expressionParsers->add($extension->getExpressionParsers());
}
$operators = $extension->getOperators();
if (!\is_array($operators)) {
throw new \InvalidArgumentException(\sprintf('"%s::getOperators()" must return an array with operators, got "%s".', $extension::class, get_debug_type($operators).(\is_resource($operators) ? '' : '#'.$operators)));
}
if (2 !== \count($operators)) {
throw new \InvalidArgumentException(\sprintf('"%s::getOperators()" must return an array of 2 elements, got %d.', $extension::class, \count($operators)));
}
$expressionParsers = [];
foreach ($operators[0] as $operator => $op) {
$expressionParsers[] = new UnaryOperatorExpressionParser($op['class'], $operator, $op['precedence'], $op['precedence_change'] ?? null, '', $op['aliases'] ?? []);
}
foreach ($operators[1] as $operator => $op) {
$op['associativity'] = match ($op['associativity']) {
1 => InfixAssociativity::Left,
2 => InfixAssociativity::Right,
default => throw new \InvalidArgumentException(\sprintf('Invalid associativity "%s" for operator "%s".', $op['associativity'], $operator)),
};
if (isset($op['callable'])) {
$expressionParsers[] = $this->convertInfixExpressionParser($op['class'], $operator, $op['precedence'], $op['associativity'], $op['precedence_change'] ?? null, $op['aliases'] ?? [], $op['callable']);
} else {
$expressionParsers[] = new BinaryOperatorExpressionParser($op['class'], $operator, $op['precedence'], $op['associativity'], $op['precedence_change'] ?? null, '', $op['aliases'] ?? []);
}
}
if (\count($expressionParsers)) {
trigger_deprecation('twig/twig', '3.21', \sprintf('Extension "%s" uses the old signature for "getOperators()", please implement "getExpressionParsers()" instead.', $extension::class));
$this->expressionParsers->add($expressionParsers);
}
}
private function convertInfixExpressionParser(string $nodeClass, string $operator, int $precedence, InfixAssociativity $associativity, ?PrecedenceChange $precedenceChange, array $aliases, callable $callable): InfixExpressionParserInterface
{
trigger_deprecation('twig/twig', '3.21', \sprintf('Using a non-ExpressionParserInterface object to define the "%s" binary operator is deprecated.', $operator));
return new class($nodeClass, $operator, $precedence, $associativity, $precedenceChange, $aliases, $callable) extends BinaryOperatorExpressionParser {
public function __construct(
string $nodeClass,
string $operator,
int $precedence,
InfixAssociativity $associativity = InfixAssociativity::Left,
?PrecedenceChange $precedenceChange = null,
array $aliases = [],
private $callable = null,
) {
parent::__construct($nodeClass, $operator, $precedence, $associativity, $precedenceChange, $aliases);
}
public function parse(Parser $parser, AbstractExpression $expr, Token $token): AbstractExpression
{
return ($this->callable)($parser, $expr);
}
};
}
}