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<?php |
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/* |
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* |
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* (c) Yaroslav Honcharuk <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Yarhon\RouteGuardBundle\ExpressionLanguage; |
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use Symfony\Component\ExpressionLanguage\ParsedExpression; |
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use Symfony\Component\ExpressionLanguage\Node\Node; |
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use Symfony\Component\ExpressionLanguage\Node\NameNode; |
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use Symfony\Component\ExpressionLanguage\Node\GetAttrNode; |
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use Symfony\Component\ExpressionLanguage\Node\ConstantNode; |
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/** |
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* @author Yaroslav Honcharuk <[email protected]> |
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*/ |
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class ExpressionAnalyzer |
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{ |
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/** |
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* @param ParsedExpression $expression |
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* |
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* @return string[] |
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*/ |
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public function getUsedVariables(ParsedExpression $expression) |
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{ |
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$variables = []; |
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$this->collectVariables($expression->getNodes(), $variables); |
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return array_unique($variables); |
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} |
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/** |
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* @param ParsedExpression $expression |
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* @param string $variable |
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* |
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* @return string[] |
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*/ |
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public function getVariableAttributesCalls(ParsedExpression $expression, $variable) |
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{ |
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$attributes = []; |
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$this->collectVariableGetAttr($expression->getNodes(), $variable, $attributes); |
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return array_unique($attributes); |
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} |
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/** |
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* @param Node $node |
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* @param array $variables |
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*/ |
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private function collectVariables(Node $node, array &$variables) |
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{ |
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if ($node instanceof NameNode) { |
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$variables[] = $node->attributes['name']; |
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} |
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foreach ($node->nodes as $innerNode) { |
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$this->collectVariables($innerNode, $variables); |
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} |
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} |
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/** |
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* @param Node $node |
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* @param string $variable |
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* @param array $attributes |
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*/ |
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private function collectVariableGetAttr(Node $node, $variable, array &$attributes) |
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{ |
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if ($node instanceof GetAttrNode) { |
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$nameNode = $node->nodes['node']; |
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$attrNode = $node->nodes['attribute']; |
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if ($nameNode->attributes['name'] === $variable && $attrNode instanceof ConstantNode) { |
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$attributes[] = $attrNode->attributes['value']; |
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} |
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} |
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foreach ($node->nodes as $innerNode) { |
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$this->collectVariableGetAttr($innerNode, $variable, $attributes); |
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} |
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} |
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} |
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yarhon /
RouteGuardBundle
