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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\ExpressionLanguage\Node;
use Symfony\Component\ExpressionLanguage\Compiler;
use Symfony\Component\ExpressionLanguage\SyntaxError;
/**
* @author Fabien Potencier <fabien@symfony.com>
*
* @internal
*/
class BinaryNode extends Node
{
private const OPERATORS = [
'~' => '.',
'and' => '&&',
'or' => '||',
];
private const FUNCTIONS = [
'**' => 'pow',
'..' => 'range',
'in' => 'in_array',
'not in' => '!in_array',
];
public function __construct(string $operator, Node $left, Node $right)
{
parent::__construct(
['left' => $left, 'right' => $right],
['operator' => $operator]
);
}
public function compile(Compiler $compiler)
{
$operator = $this->attributes['operator'];
if ('matches' == $operator) {
if ($this->nodes['right'] instanceof ConstantNode) {
$this->evaluateMatches($this->nodes['right']->evaluate([], []), '');
}
$compiler
->raw('(static function ($regexp, $str) { set_error_handler(function ($t, $m) use ($regexp, $str) { throw new \Symfony\Component\ExpressionLanguage\SyntaxError(sprintf(\'Regexp "%s" passed to "matches" is not valid\', $regexp).substr($m, 12)); }); try { return preg_match($regexp, (string) $str); } finally { restore_error_handler(); } })(')
->compile($this->nodes['right'])
->raw(', ')
->compile($this->nodes['left'])
->raw(')')
;
return;
}
if (isset(self::FUNCTIONS[$operator])) {
$compiler
->raw(sprintf('%s(', self::FUNCTIONS[$operator]))
->compile($this->nodes['left'])
->raw(', ')
->compile($this->nodes['right'])
->raw(')')
;
return;
}
if (isset(self::OPERATORS[$operator])) {
$operator = self::OPERATORS[$operator];
}
$compiler
->raw('(')
->compile($this->nodes['left'])
->raw(' ')
->raw($operator)
->raw(' ')
->compile($this->nodes['right'])
->raw(')')
;
}
public function evaluate(array $functions, array $values)
{
$operator = $this->attributes['operator'];
$left = $this->nodes['left']->evaluate($functions, $values);
if (isset(self::FUNCTIONS[$operator])) {
$right = $this->nodes['right']->evaluate($functions, $values);
if ('not in' === $operator) {
return !\in_array($left, $right);
}
$f = self::FUNCTIONS[$operator];
return $f($left, $right);
}
switch ($operator) {
case 'or':
case '||':
return $left || $this->nodes['right']->evaluate($functions, $values);
case 'and':
case '&&':
return $left && $this->nodes['right']->evaluate($functions, $values);
}
$right = $this->nodes['right']->evaluate($functions, $values);
switch ($operator) {
case '|':
return $left | $right;
case '^':
return $left ^ $right;
case '&':
return $left & $right;
case '==':
return $left == $right;
case '===':
return $left === $right;
case '!=':
return $left != $right;
case '!==':
return $left !== $right;
case '<':
return $left < $right;
case '>':
return $left > $right;
case '>=':
return $left >= $right;
case '<=':
return $left <= $right;
case 'not in':
return !\in_array($left, $right);
case 'in':
return \in_array($left, $right);
case '+':
return $left + $right;
case '-':
return $left - $right;
case '~':
return $left.$right;
case '*':
return $left * $right;
case '/':
if (0 == $right) {
throw new \DivisionByZeroError('Division by zero.');
}
return $left / $right;
case '%':
if (0 == $right) {
throw new \DivisionByZeroError('Modulo by zero.');
}
return $left % $right;
case 'matches':
return $this->evaluateMatches($right, $left);
}
}
public function toArray()
{
return ['(', $this->nodes['left'], ' '.$this->attributes['operator'].' ', $this->nodes['right'], ')'];
}
private function evaluateMatches(string $regexp, ?string $str): int
{
set_error_handler(function ($t, $m) use ($regexp) {
throw new SyntaxError(sprintf('Regexp "%s" passed to "matches" is not valid', $regexp).substr($m, 12));
});
try {
return preg_match($regexp, (string) $str);
} finally {
restore_error_handler();
}
}
}
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