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<?php
namespace NXP\Classes;
use NXP\Exception\IncorrectFunctionParameterException;
use NXP\Exception\IncorrectNumberOfFunctionParametersException;
use ReflectionException;
use ReflectionFunction;
class CustomFunction
{
public string $name = '';
/**
* @var callable $function
*/
public $function;
private ReflectionFunction $reflectionFunction;
/**
* CustomFunction constructor.
*
* @throws ReflectionException
*/
public function __construct(string $name, callable $function)
{
$this->name = $name;
$this->function = $function;
$this->reflectionFunction = new ReflectionFunction($function);
}
/**
* @param array<Token> $stack
*
* @throws IncorrectNumberOfFunctionParametersException|IncorrectFunctionParameterException
*/
public function execute(array &$stack, int $paramCountInStack) : Token
{
if ($paramCountInStack < $this->reflectionFunction->getNumberOfRequiredParameters()) {
throw new IncorrectNumberOfFunctionParametersException($this->name);
}
$args = [];
if ($paramCountInStack > 0) {
$reflectionParameters = $this->reflectionFunction->getParameters();
for ($i = 0; $i < $paramCountInStack; $i++) {
$value = \array_pop($stack)->value;
$valueType = \gettype($value);
$reflectionParameter = $reflectionParameters[\min(\count($reflectionParameters) - 1, $i)];
//TODO to support type check for union types (php >= 8.0) and intersection types (php >= 8.1), we should increase min php level in composer.json
// For now, only support basic types. @see testFunctionParameterTypes
if ($reflectionParameter->hasType() && $reflectionParameter->getType()->getName() !== $valueType){
throw new IncorrectFunctionParameterException();
}
\array_unshift($args, $value);
}
}
$result = \call_user_func_array($this->function, $args);
return new Token(Token::Literal, $result);
}
}
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