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<?php |
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namespace TYPO3Fluid\Fluid\Core\Parser\SyntaxTree; |
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/* |
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* This file belongs to the package "TYPO3 Fluid". |
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* See LICENSE.txt that was shipped with this package. |
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*/ |
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use TYPO3Fluid\Fluid\Core\Parser; |
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use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface; |
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/** |
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* Abstract node in the syntax tree which has been built. |
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*/ |
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abstract class AbstractNode implements NodeInterface |
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{ |
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/** |
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* List of Child Nodes. |
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* |
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* @var NodeInterface[] |
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*/ |
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protected $childNodes = []; |
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/** |
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* Evaluate all child nodes and return the evaluated results. |
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* |
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* @param RenderingContextInterface $renderingContext |
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* @return mixed Normally, an object is returned - in case it is concatenated with a string, a string is returned. |
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* @throws Parser\Exception |
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*/ |
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public function evaluateChildNodes(RenderingContextInterface $renderingContext) |
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{ |
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$evaluatedNodes = []; |
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foreach ($this->getChildNodes() as $childNode) { |
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$evaluatedNodes[] = $this->evaluateChildNode($childNode, $renderingContext, false); |
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} |
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// Make decisions about what to actually return |
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if (empty($evaluatedNodes)) { |
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return null; |
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} |
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if (count($evaluatedNodes) === 1) { |
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return $evaluatedNodes[0]; |
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} |
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return implode('', array_map([$this, 'castToString'], $evaluatedNodes)); |
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} |
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/** |
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* @param NodeInterface $node |
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* @param RenderingContextInterface $renderingContext |
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* @param boolean $cast |
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* @return mixed |
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*/ |
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protected function evaluateChildNode(NodeInterface $node, RenderingContextInterface $renderingContext, $cast) |
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{ |
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$output = $node->evaluate($renderingContext); |
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if ($cast) { |
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$output = $this->castToString($output); |
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} |
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return $output; |
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} |
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/** |
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* @param mixed $value |
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* @return string |
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*/ |
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protected function castToString($value) |
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{ |
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if (is_object($value) && !method_exists($value, '__toString')) { |
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throw new Parser\Exception('Cannot cast object of type "' . get_class($value) . '" to string.', 1273753083); |
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} |
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$output = (string) $value; |
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return $output; |
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} |
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/** |
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* Returns all child nodes for a given node. |
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* This is especially needed to implement the boolean expression language. |
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* |
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* @return NodeInterface[] A list of nodes |
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*/ |
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public function getChildNodes() |
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{ |
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return $this->childNodes; |
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} |
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/** |
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* Appends a sub node to this node. Is used inside the parser to append children |
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* |
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* @param NodeInterface $childNode The sub node to add |
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* @return void |
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*/ |
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public function addChildNode(NodeInterface $childNode) |
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{ |
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$this->childNodes[] = $childNode; |
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} |
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} |
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TYPO3 /
Fluid
