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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2012 Fabien Potencier
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
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{
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protected function compileCallable(Twig_Compiler $compiler)
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{
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$closingParenthesis = false;
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if ($this->hasAttribute('callable') && $callable = $this->getAttribute('callable')) {
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if (is_string($callable)) {
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$compiler->raw($callable);
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} elseif (is_array($callable) && $callable[0] instanceof Twig_ExtensionInterface) {
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$compiler->raw(sprintf('$this->env->getExtension(\'%s\')->%s', $callable[0]->getName(), $callable[1]));
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} else {
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$type = ucfirst($this->getAttribute('type'));
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$compiler->raw(sprintf('call_user_func_array($this->env->get%s(\'%s\')->getCallable(), array', $type, $this->getAttribute('name')));
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$closingParenthesis = true;
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}
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} else {
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$compiler->raw($this->getAttribute('thing')->compile());
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}
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$this->compileArguments($compiler);
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if ($closingParenthesis) {
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$compiler->raw(')');
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}
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}
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protected function compileArguments(Twig_Compiler $compiler)
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{
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$compiler->raw('(');
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$first = true;
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if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
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$compiler->raw('$this->env');
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$first = false;
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}
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if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
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if (!$first) {
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$compiler->raw(', ');
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}
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$compiler->raw('$context');
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$first = false;
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}
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if ($this->hasAttribute('arguments')) {
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foreach ($this->getAttribute('arguments') as $argument) {
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if (!$first) {
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$compiler->raw(', ');
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}
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$compiler->string($argument);
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$first = false;
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}
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}
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if ($this->hasNode('node')) {
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if (!$first) {
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$compiler->raw(', ');
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}
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$compiler->subcompile($this->getNode('node'));
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$first = false;
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}
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if ($this->hasNode('arguments') && null !== $this->getNode('arguments')) {
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$callable = $this->hasAttribute('callable') ? $this->getAttribute('callable') : null;
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$arguments = $this->getArguments($callable, $this->getNode('arguments'));
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foreach ($arguments as $node) {
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if (!$first) {
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$compiler->raw(', ');
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}
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$compiler->subcompile($node);
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$first = false;
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}
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}
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$compiler->raw(')');
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}
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protected function getArguments($callable, $arguments)
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{
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$callType = $this->getAttribute('type');
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$callName = $this->getAttribute('name');
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$parameters = array();
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$named = false;
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foreach ($arguments as $name => $node) {
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if (!is_int($name)) {
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$named = true;
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$name = $this->normalizeName($name);
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} elseif ($named) {
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throw new Twig_Error_Syntax(sprintf('Positional arguments cannot be used after named arguments for %s "%s".', $callType, $callName));
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}
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$parameters[$name] = $node;
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}
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$isVariadic = $this->hasAttribute('is_variadic') && $this->getAttribute('is_variadic');
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if (!$named && !$isVariadic) {
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return $parameters;
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}
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if (!$callable) {
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if ($named) {
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$message = sprintf('Named arguments are not supported for %s "%s".', $callType, $callName);
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} else {
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$message = sprintf('Arbitrary positional arguments are not supported for %s "%s".', $callType, $callName);
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}
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throw new LogicException($message);
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}
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// manage named arguments
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$callableParameters = $this->getCallableParameters($callable, $isVariadic);
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$arguments = array();
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$names = array();
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$missingArguments = array();
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$optionalArguments = array();
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$pos = 0;
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foreach ($callableParameters as $callableParameter) {
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$names[] = $name = $this->normalizeName($callableParameter->name);
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if (array_key_exists($name, $parameters)) {
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if (array_key_exists($pos, $parameters)) {
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throw new Twig_Error_Syntax(sprintf('Argument "%s" is defined twice for %s "%s".', $name, $callType, $callName));
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}
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if (!empty($missingArguments)) {
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throw new Twig_Error_Syntax(sprintf(
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'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".',
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$name, $callType, $callName, implode(', ', $names), count($missingArguments) > 1 ? 's' : '', implode('", "', $missingArguments))
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);
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}
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$arguments = array_merge($arguments, $optionalArguments);
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$arguments[] = $parameters[$name];
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unset($parameters[$name]);
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$optionalArguments = array();
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} elseif (array_key_exists($pos, $parameters)) {
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$arguments = array_merge($arguments, $optionalArguments);
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$arguments[] = $parameters[$pos];
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unset($parameters[$pos]);
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$optionalArguments = array();
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++$pos;
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} elseif ($callableParameter->isDefaultValueAvailable()) {
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$optionalArguments[] = new Twig_Node_Expression_Constant($callableParameter->getDefaultValue(), -1);
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} elseif ($callableParameter->isOptional()) {
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if (empty($parameters)) {
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break;
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} else {
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$missingArguments[] = $name;
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}
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} else {
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throw new Twig_Error_Syntax(sprintf('Value for argument "%s" is required for %s "%s".', $name, $callType, $callName));
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}
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}
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if ($isVariadic) {
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$arbitraryArguments = new Twig_Node_Expression_Array(array(), -1);
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foreach ($parameters as $key => $value) {
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if (is_int($key)) {
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$arbitraryArguments->addElement($value);
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} else {
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$arbitraryArguments->addElement($value, new Twig_Node_Expression_Constant($key, -1));
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}
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unset($parameters[$key]);
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}
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if ($arbitraryArguments->count()) {
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$arguments = array_merge($arguments, $optionalArguments);
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$arguments[] = $arbitraryArguments;
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}
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}
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if (!empty($parameters)) {
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$unknownParameter = null;
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foreach ($parameters as $parameter) {
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if ($parameter instanceof Twig_Node) {
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$unknownParameter = $parameter;
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break;
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}
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}
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throw new Twig_Error_Syntax(sprintf(
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'Unknown argument%s "%s" for %s "%s(%s)".',
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count($parameters) > 1 ? 's' : '', implode('", "', array_keys($parameters)), $callType, $callName, implode(', ', $names)
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), $unknownParameter ? $unknownParameter->getLine() : -1);
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}
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return $arguments;
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}
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protected function normalizeName($name)
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{
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return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), $name));
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}
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private function getCallableParameters($callable, $isVariadic)
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{
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if (is_array($callable)) {
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$r = new ReflectionMethod($callable[0], $callable[1]);
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} elseif (is_object($callable) && !$callable instanceof Closure) {
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$r = new ReflectionObject($callable);
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$r = $r->getMethod('__invoke');
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} elseif (is_string($callable) && false !== strpos($callable, '::')) {
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$r = new ReflectionMethod($callable);
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} else {
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$r = new ReflectionFunction($callable);
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}
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$parameters = $r->getParameters();
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if ($this->hasNode('node')) {
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array_shift($parameters);
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}
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if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
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array_shift($parameters);
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}
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if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
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array_shift($parameters);
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}
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if ($this->hasAttribute('arguments') && null !== $this->getAttribute('arguments')) {
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foreach ($this->getAttribute('arguments') as $argument) {
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array_shift($parameters);
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}
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}
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if ($isVariadic) {
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$argument = end($parameters);
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if ($argument && $argument->isArray() && $argument->isDefaultValueAvailable() && array() === $argument->getDefaultValue()) {
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array_pop($parameters);
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} else {
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$callableName = $r->name;
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if ($r->getDeclaringClass()) {
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$callableName = $r->getDeclaringClass()->name.'::'.$callableName;
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}
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throw new LogicException(sprintf('The last parameter of "%s" for %s "%s" must be an array with default value, eg. "array $arg = array()".', $callableName, $this->getAttribute('type'), $this->getAttribute('name')));
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}
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}
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return $parameters;
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}
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}
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