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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.
*/
abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
{
private $reflector;
protected function compileCallable(Twig_Compiler $compiler)
{
$closingParenthesis = false;
if ($this->hasAttribute('callable') && $callable = $this->getAttribute('callable')) {
if (is_string($callable) && false === strpos($callable, '::')) {
$compiler->raw($callable);
} else {
list($r, $callable) = $this->reflectCallable($callable);
if ($r instanceof ReflectionMethod && is_string($callable[0])) {
if ($r->isStatic()) {
$compiler->raw(sprintf('%s::%s', $callable[0], $callable[1]));
} else {
$compiler->raw(sprintf('$this->env->getRuntime(\'%s\')->%s', $callable[0], $callable[1]));
}
} elseif ($r instanceof ReflectionMethod && $callable[0] instanceof Twig_ExtensionInterface) {
$compiler->raw(sprintf('$this->env->getExtension(\'%s\')->%s', get_class($callable[0]), $callable[1]));
} else {
$type = ucfirst($this->getAttribute('type'));
$compiler->raw(sprintf('call_user_func_array($this->env->get%s(\'%s\')->getCallable(), array', $type, $this->getAttribute('name')));
$closingParenthesis = true;
}
}
} else {
$compiler->raw($this->getAttribute('thing')->compile());
}
$this->compileArguments($compiler);
if ($closingParenthesis) {
$compiler->raw(')');
}
}
protected function compileArguments(Twig_Compiler $compiler)
{
$compiler->raw('(');
$first = true;
if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
$compiler->raw('$this->env');
$first = false;
}
if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
if (!$first) {
$compiler->raw(', ');
}
$compiler->raw('$context');
$first = false;
}
if ($this->hasAttribute('arguments')) {
foreach ($this->getAttribute('arguments') as $argument) {
if (!$first) {
$compiler->raw(', ');
}
$compiler->string($argument);
$first = false;
}
}
if ($this->hasNode('node')) {
if (!$first) {
$compiler->raw(', ');
}
$compiler->subcompile($this->getNode('node'));
$first = false;
}
if ($this->hasNode('arguments')) {
$callable = $this->hasAttribute('callable') ? $this->getAttribute('callable') : null;
$arguments = $this->getArguments($callable, $this->getNode('arguments'));
foreach ($arguments as $node) {
if (!$first) {
$compiler->raw(', ');
}
$compiler->subcompile($node);
$first = false;
}
}
$compiler->raw(')');
}
protected function getArguments($callable, $arguments)
{
$callType = $this->getAttribute('type');
$callName = $this->getAttribute('name');
$parameters = array();
$named = false;
foreach ($arguments as $name => $node) {
if (!is_int($name)) {
$named = true;
$name = $this->normalizeName($name);
} elseif ($named) {
throw new Twig_Error_Syntax(sprintf('Positional arguments cannot be used after named arguments for %s "%s".', $callType, $callName));
}
$parameters[$name] = $node;
}
$isVariadic = $this->hasAttribute('is_variadic') && $this->getAttribute('is_variadic');
if (!$named && !$isVariadic) {
return $parameters;
}
if (!$callable) {
if ($named) {
$message = sprintf('Named arguments are not supported for %s "%s".', $callType, $callName);
} else {
$message = sprintf('Arbitrary positional arguments are not supported for %s "%s".', $callType, $callName);
}
throw new LogicException($message);
}
$callableParameters = $this->getCallableParameters($callable, $isVariadic);
$arguments = array();
$names = array();
$missingArguments = array();
$optionalArguments = array();
$pos = 0;
foreach ($callableParameters as $callableParameter) {
$names[] = $name = $this->normalizeName($callableParameter->name);
if (array_key_exists($name, $parameters)) {
if (array_key_exists($pos, $parameters)) {
throw new Twig_Error_Syntax(sprintf('Argument "%s" is defined twice for %s "%s".', $name, $callType, $callName));
}
if (count($missingArguments)) {
throw new Twig_Error_Syntax(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, $callType, $callName, implode(', ', $names), count($missingArguments) > 1 ? 's' : '', implode('", "', $missingArguments))
);
}
$arguments = array_merge($arguments, $optionalArguments);
$arguments[] = $parameters[$name];
unset($parameters[$name]);
$optionalArguments = array();
} elseif (array_key_exists($pos, $parameters)) {
$arguments = array_merge($arguments, $optionalArguments);
$arguments[] = $parameters[$pos];
unset($parameters[$pos]);
$optionalArguments = array();
++$pos;
} elseif ($callableParameter->isDefaultValueAvailable()) {
$optionalArguments[] = new Twig_Node_Expression_Constant($callableParameter->getDefaultValue(), -1);
} elseif ($callableParameter->isOptional()) {
if (empty($parameters)) {
break;
} else {
$missingArguments[] = $name;
}
} else {
throw new Twig_Error_Syntax(sprintf('Value for argument "%s" is required for %s "%s".', $name, $callType, $callName));
}
}
if ($isVariadic) {
$arbitraryArguments = new Twig_Node_Expression_Array(array(), -1);
foreach ($parameters as $key => $value) {
if (is_int($key)) {
$arbitraryArguments->addElement($value);
} else {
$arbitraryArguments->addElement($value, new Twig_Node_Expression_Constant($key, -1));
}
unset($parameters[$key]);
}
if ($arbitraryArguments->count()) {
$arguments = array_merge($arguments, $optionalArguments);
$arguments[] = $arbitraryArguments;
}
}
if (!empty($parameters)) {
$unknownParameter = null;
foreach ($parameters as $parameter) {
if ($parameter instanceof Twig_Node) {
$unknownParameter = $parameter;
break;
}
}
throw new Twig_Error_Syntax(sprintf(
'Unknown argument%s "%s" for %s "%s(%s)".',
count($parameters) > 1 ? 's' : '', implode('", "', array_keys($parameters)), $callType, $callName, implode(', ', $names)
), $unknownParameter ? $unknownParameter->getTemplateLine() : -1);
}
return $arguments;
}
protected function normalizeName($name)
{
return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), $name));
}
private function getCallableParameters($callable, $isVariadic)
{
list($r) = $this->reflectCallable($callable);
if (null === $r) {
return array();
}
$parameters = $r->getParameters();
if ($this->hasNode('node')) {
array_shift($parameters);
}
if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
array_shift($parameters);
}
if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
array_shift($parameters);
}
if ($this->hasAttribute('arguments') && null !== $this->getAttribute('arguments')) {
foreach ($this->getAttribute('arguments') as $argument) {
array_shift($parameters);
}
}
if ($isVariadic) {
$argument = end($parameters);
if ($argument && $argument->isArray() && $argument->isDefaultValueAvailable() && array() === $argument->getDefaultValue()) {
array_pop($parameters);
} else {
$callableName = $r->name;
if ($r instanceof ReflectionMethod) {
$callableName = $r->getDeclaringClass()->name.'::'.$callableName;
}
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')));
}
}
return $parameters;
}
private function reflectCallable($callable)
{
if (null !== $this->reflector) {
return $this->reflector;
}
if (is_array($callable)) {
if (!method_exists($callable[0], $callable[1])) {
// __call()
return array(null, array());
}
$r = new ReflectionMethod($callable[0], $callable[1]);
} elseif (is_object($callable) && !$callable instanceof Closure) {
$r = new ReflectionObject($callable);
$r = $r->getMethod('__invoke');
$callable = array($callable, '__invoke');
} elseif (is_string($callable) && false !== $pos = strpos($callable, '::')) {
$class = substr($callable, 0, $pos);
$method = substr($callable, $pos + 2);
if (!method_exists($class, $method)) {
// __staticCall()
return array(null, array());
}
$r = new ReflectionMethod($callable);
$callable = array($class, $method);
} else {
$r = new ReflectionFunction($callable);
}
return $this->reflector = array($r, $callable);
}
}