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<?php
/**
* @author Tassos.gr <info@tassos.gr>
* @link https://www.tassos.gr
* @copyright Copyright © 2024 Tassos All Rights Reserved
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
*/
namespace NRFramework\Parser;
defined('_JEXEC') or die;
/**
* Tokens
* Holds token types and manages creation of new tokens
*/
class Tokens
{
/**
* Token types array
*
* @var array
*/
protected $types = [];
public function __construct()
{
// default types
$this->addType('invalid_token');
$this->addType('EOF');
}
/**
* Adds a new token type
*
* @param string $type
* @return $this
*/
public function addType($type)
{
if (!$this->hasType($type))
{
$this->types[] = $type;
}
return $this;
}
/**
* Gets a token type id (i.e. it's array index)
*
* @param string $type
* @return int|null
*/
public function getTypeId($type)
{
$id = array_search($type, $this->types);
$id = $id !== false ? $id : null;
return $id;
}
/**
* Returns the token types array
*
* @return array
*/
public function getTypes()
{
return clone $this->types;
}
/**
* Creates a new token
*
* @param string $type
* @param string $text
* @param integer $position, Position of token in the input stream
* @return Token
*/
public function create($type, $text, $position)
{
return new Token($type, $text, $position);
}
/**
* Checks if a type is registered
*
* @param string $type
* @return boolean
*/
public function hasType($type)
{
return (bool)array_search($type, $this->types);
}
}