/**
* Calls a method with given arguments
*
* @param string $methodName
* @param array $arguments
* @return mixed
* @throws FunctionException If the method does not exist
*/
public function call($methodName, $arguments = [])
{
$methodName = strtolower($methodName);
if (isset($this->aliases[$methodName])) {
$methodName = $this->aliases[$methodName];
}
if (isset($this->functions[$methodName])) {
$arguments = $this->prepareArguments($arguments);
if ($this->functions[$methodName] === true) {
// built in function
return call_user_func_array([$this, $methodName], $arguments);
} else {
// this is a external callable
// provide access to function registry (pass as first parameter)
array_unshift($arguments, $this);
return call_user_func_array($this->functions[$methodName], $arguments);
}
} else {
if ($this->parent) {
return $this->parent->call($methodName, $arguments);
}
}
}
/**
* @covers addFunction
*/
public function testCustomFunction()
{
$registry = new FunctionRegistry();
$registry->addFunction('foobar', [$this, 'foobarCallable']);
$registry->call('foobar', ['a', 'b']);
}
/**
* Sets the function registry, also links the registry with this environment instance.
*
* @param FunctionRegistry $registry
*
* @return Context
*/
public function setFunctionRegistry(FunctionRegistry $registry)
{
$this->functionRegistry = $registry;
// provide access to The context, which is need to access generateCSS()
$this->functionRegistry->setEnvironment($this);
return $this;
}
