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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\template\twig;
class extension extends \Twig_Extension
{
/** @var \phpbb\template\context */
protected $context;
/** @var \phpbb\template\twig\environment */
protected $environment;
/** @var \phpbb\language\language */
protected $language;
/**
* Constructor
*
* @param \phpbb\template\context $context
* @param \phpbb\template\twig\environment $environment
* @param \phpbb\language\language $language
*/
public function __construct(\phpbb\template\context $context, \phpbb\template\twig\environment $environment, $language)
{
$this->context = $context;
$this->environment = $environment;
$this->language = $language;
}
/**
* Get the name of this extension
*
* @return string
*/
public function getName()
{
return 'phpbb';
}
/**
* Returns the token parser instance to add to the existing list.
*
* @return array An array of Twig_TokenParser instances
*/
public function getTokenParsers()
{
return array(
new \phpbb\template\twig\tokenparser\defineparser,
new \phpbb\template\twig\tokenparser\includeparser,
new \phpbb\template\twig\tokenparser\includejs,
new \phpbb\template\twig\tokenparser\includecss,
new \phpbb\template\twig\tokenparser\event($this->environment),
new \phpbb\template\twig\tokenparser\includephp($this->environment),
new \phpbb\template\twig\tokenparser\php($this->environment),
);
}
/**
* Returns a list of filters to add to the existing list.
*
* @return array An array of filters
*/
public function getFilters()
{
return array(
new \Twig_SimpleFilter('subset', array($this, 'loop_subset'), array('needs_environment' => true)),
// @deprecated 3.2.0 Uses twig's JS escape method instead of addslashes
new \Twig_SimpleFilter('addslashes', 'addslashes'),
);
}
/**
* Returns a list of global functions to add to the existing list.
*
* @return array An array of global functions
*/
public function getFunctions()
{
return array(
new \Twig_SimpleFunction('lang', array($this, 'lang')),
new \Twig_SimpleFunction('lang_defined', array($this, 'lang_defined')),
new \Twig_SimpleFunction('get_class', 'get_class'),
);
}
/**
* Returns a list of operators to add to the existing list.
*
* @return array An array of operators
*/
public function getOperators()
{
return array(
array(
'!' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Not'),
),
array(
// precedence settings are copied from similar operators in Twig core extension
'||' => array('precedence' => 10, 'class' => 'Twig_Node_Expression_Binary_Or', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'&&' => array('precedence' => 15, 'class' => 'Twig_Node_Expression_Binary_And', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'eq' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Equal', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'ne' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotEqual', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'neq' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotEqual', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'<>' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotEqual', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'===' => array('precedence' => 20, 'class' => '\phpbb\template\twig\node\expression\binary\equalequal', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'!==' => array('precedence' => 20, 'class' => '\phpbb\template\twig\node\expression\binary\notequalequal', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'gt' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Greater', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'gte' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_GreaterEqual', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'ge' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_GreaterEqual', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'lt' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Less', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'lte' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_LessEqual', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'le' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_LessEqual', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
'mod' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mod', 'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT),
),
);
}
/**
* Grabs a subset of a loop
*
* @param \Twig_Environment $env A Twig_Environment instance
* @param mixed $item A variable
* @param integer $start Start of the subset
* @param integer $end End of the subset
* @param Boolean $preserveKeys Whether to preserve key or not (when the input is an array)
*
* @return mixed The sliced variable
*/
public function loop_subset(\Twig_Environment $env, $item, $start, $end = null, $preserveKeys = false)
{
// We do almost the same thing as Twig's slice (array_slice), except when $end is positive
if ($end >= 1)
{
// When end is > 1, subset will end on the last item in an array with the specified $end
// This is different from slice in that it is the number we end on rather than the number
// of items to grab (length)
// Start must always be the actual starting number for this calculation (not negative)
$start = ($start < 0) ? count($item) + $start : $start;
$end = $end - $start;
}
// We always include the last element (this was the past design)
$end = ($end == -1 || $end === null) ? null : $end + 1;
return twig_slice($env, $item, $start, $end, $preserveKeys);
}
/**
* Get output for a language variable (L_FOO, LA_FOO)
*
* This function checks to see if the language var was outputted to $context
* (e.g. in the ACP, L_TITLE)
* If not, we return the result of $user->lang()
*
* @return string
*/
public function lang()
{
$args = func_get_args();
$key = $args[0];
$context_vars = $this->context->get_root_ref();
if (is_string($key) && isset($context_vars['L_' . $key]))
{
return $context_vars['L_' . $key];
}
// LA_ is transformed into lang(\'$1\')|escape('js'), so we should not
// need to check for it
return call_user_func_array(array($this->language, 'lang'), $args);
}
/**
* Check if a language variable exists
*
* @return bool
*/
public function lang_defined($key)
{
return call_user_func_array([$this->language, 'is_set'], [$key]);
}
}
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