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<?php |
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namespace Bolt\Twig; |
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/* |
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* Adapted from code originally in Twig/extensions. |
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* |
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* Usage: |
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* |
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* {% set foo = 1 %} |
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* {% switch foo %} |
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* {% case 1 %} |
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* Foo was equal to the number one. |
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* {% case 2 %} |
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* Foo was two. |
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* {% default %} |
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* This is the default fallback. |
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* {% endswitch %} |
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* |
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* |
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* @see: https://gist.github.com/maxgalbu/9409182 |
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*/ |
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class SwitchTokenParser extends \Twig_TokenParser |
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{ |
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/** |
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* Parses a token and returns a node. |
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* |
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* @param Twig_Token $token A Twig_Token instance |
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* |
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* @return Twig_NodeInterface A Twig_NodeInterface instance |
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*/ |
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public function parse(\Twig_Token $token) |
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{ |
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$parser = $this->parser; |
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$stream = $parser->getStream(); |
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$default = null; |
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$cases = []; |
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$end = false; |
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$name = $parser->getExpressionParser()->parseExpression(); |
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$stream->expect(\Twig_Token::BLOCK_END_TYPE); |
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$stream->expect(\Twig_Token::TEXT_TYPE); |
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$stream->expect(\Twig_Token::BLOCK_START_TYPE); |
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while (!$end) { |
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$v = $stream->next(); |
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switch ($v->getValue()) { |
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case 'default': |
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$stream->expect(\Twig_Token::BLOCK_END_TYPE); |
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$default = $parser->subparse([$this, 'decideIfEnd']); |
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break; |
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case 'case': |
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$expr = $parser->getExpressionParser()->parseExpression(); |
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$stream->expect(\Twig_Token::BLOCK_END_TYPE); |
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$body = $parser->subparse([$this, 'decideIfFork']); |
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$cases[] = $expr; |
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$cases[] = $body; |
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break; |
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case 'endswitch': |
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$end = true; |
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break; |
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default: |
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throw new \Twig_Error_Syntax(sprintf('Unexpected end of template. Twig was looking for the following tags "case", "default", or "endswitch" to close the "switch" block started at line %d)', $lineno), -1); |
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} |
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} |
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$stream->expect(\Twig_Token::BLOCK_END_TYPE); |
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return new SwitchNode($name, new \Twig_Node($cases), $default, $token->getLine(), $this->getTag()); |
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} |
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public function decideIfFork($token) |
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{ |
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return $token->test(['case', 'default', 'endswitch']); |
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} |
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public function decideIfEnd($token) |
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{ |
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return $token->test(['endswitch']); |
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} |
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/** |
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* Gets the tag name associated with this token parser. |
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* |
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* @param string The tag name |
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*/ |
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public function getTag() |
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{ |
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return 'switch'; |
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} |
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} |
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bolt /
bolt
