<?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; $isArray = false; if ($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(), ', $type, $this->getAttribute('name'))); $closingParenthesis = true; $isArray = true; } } } else { $compiler->raw($this->getAttribute('thing')->compile()); } $this->compileArguments($compiler, $isArray); if ($closingParenthesis) { $compiler->raw(')'); } } protected function compileArguments(Twig_Compiler $compiler, $isArray = false) { $compiler->raw($isArray ? '[' : '('); $first = true; if ($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; } } $compiler->raw($isArray ? ']' : ')'); } protected function getArguments($callable, $arguments) { $callType = $this->getAttribute('type'); $callName = $this->getAttribute('name'); $parameters = []; $named = false; foreach ($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), $this->getTemplateLine()); } $parameters[$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 = []; $names = []; $missingArguments = []; $optionalArguments = []; $pos = 0; foreach ($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), $this->getTemplateLine()); } if (count($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) ), $this->getTemplateLine()); } $arguments = array_merge($arguments, $optionalArguments); $arguments[] = $parameters[$name]; unset($parameters[$name]); $optionalArguments = []; } elseif (array_key_exists($pos, $parameters)) { $arguments = array_merge($arguments, $optionalArguments); $arguments[] = $parameters[$pos]; unset($parameters[$pos]); $optionalArguments = []; ++$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), $this->getTemplateLine()); } } if ($isVariadic) { $arbitraryArguments = new Twig_Node_Expression_Array([], -1); foreach ($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() : $this->getTemplateLine()); } return $arguments; } protected function normalizeName($name) { return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], $name)); } private function getCallableParameters($callable, $isVariadic) { list($r) = $this->reflectCallable($callable); if (null === $r) { return []; } $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() && [] === $argument->getDefaultValue()) { array_pop($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 = []".', $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 [null, []]; } $r = new ReflectionMethod($callable[0], $callable[1]); } elseif (is_object($callable) && !$callable instanceof Closure) { $r = new ReflectionObject($callable); $r = $r->getMethod('__invoke'); $callable = [$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 [null, []]; } $r = new ReflectionMethod($callable); $callable = [$class, $method]; } else { $r = new ReflectionFunction($callable); } return $this->reflector = [$r, $callable]; } } class_alias('Twig_Node_Expression_Call', 'Twig\Node\Expression\CallExpression', false);