/**
* @inheritdoc
*/
public function parse(array $tokens)
{
$ast = new AbstractSyntaxTree();
/** @var Token $token */
foreach ($tokens as $token) {
switch ($token->getType()) {
case TokenTypes::T_EXPRESSION:
$ast->getCurrentNode()->addChild(new ExpressionNode($token->getValue()));
break;
case TokenTypes::T_DIRECTIVE_OPEN:
if (!$ast->getCurrentNode()->isRoot()) {
$this->throwImproperlyNestedNodeException($token);
}
$childNode = new DirectiveNode();
$ast->getCurrentNode()->addChild($childNode);
$ast->setCurrentNode($childNode);
break;
case TokenTypes::T_DIRECTIVE_CLOSE:
if (!$ast->getCurrentNode()->isDirective()) {
$this->throwUnopenedDelimiterException($token);
}
$ast->setCurrentNode($ast->getCurrentNode()->getParent());
break;
case TokenTypes::T_DIRECTIVE_NAME:
$ast->getCurrentNode()->addChild(new DirectiveNameNode($token->getValue()));
break;
case TokenTypes::T_SANITIZED_TAG_OPEN:
if (!$ast->getCurrentNode()->isRoot()) {
$this->throwImproperlyNestedNodeException($token);
}
$childNode = new SanitizedTagNode();
$ast->getCurrentNode()->addChild($childNode);
$ast->setCurrentNode($childNode);
break;
case TokenTypes::T_SANITIZED_TAG_CLOSE:
if (!$ast->getCurrentNode()->isSanitizedTag()) {
$this->throwUnopenedDelimiterException($token);
}
$ast->setCurrentNode($ast->getCurrentNode()->getParent());
break;
case TokenTypes::T_UNSANITIZED_TAG_OPEN:
if (!$ast->getCurrentNode()->isRoot()) {
$this->throwImproperlyNestedNodeException($token);
}
$childNode = new UnsanitizedTagNode();
$ast->getCurrentNode()->addChild($childNode);
$ast->setCurrentNode($childNode);
break;
case TokenTypes::T_UNSANITIZED_TAG_CLOSE:
if (!$ast->getCurrentNode()->isUnsanitizedTag()) {
$this->throwUnopenedDelimiterException($token);
}
$ast->setCurrentNode($ast->getCurrentNode()->getParent());
break;
case TokenTypes::T_COMMENT_OPEN:
if (!$ast->getCurrentNode()->isRoot()) {
$this->throwImproperlyNestedNodeException($token);
}
$childNode = new CommentNode();
$ast->getCurrentNode()->addChild($childNode);
$ast->setCurrentNode($childNode);
break;
case TokenTypes::T_COMMENT_CLOSE:
if (!$ast->getCurrentNode()->isComment()) {
$this->throwUnopenedDelimiterException($token);
}
$ast->setCurrentNode($ast->getCurrentNode()->getParent());
break;
case TokenTypes::T_PHP_TAG_OPEN:
$ast->getCurrentNode()->addChild(new ExpressionNode($token->getValue()));
break;
case TokenTypes::T_PHP_TAG_CLOSE:
$ast->getCurrentNode()->addChild(new ExpressionNode($token->getValue()));
break;
default:
throw new RuntimeException(sprintf('Unknown token type "%s" with value "%s" near line %d', $token->getType(), $token->getValue(), $token->getLine()));
}
}
if (!$ast->getCurrentNode()->isRoot()) {
throw new RuntimeException(sprintf("Expected close delimiter, found %s", $ast->getCurrentNode()->getValue()));
}
return $ast;
}
/**
* Transpiles all nodes in an abstract syntax tree
*
* @param AbstractSyntaxTree $ast The abstract syntax tree to transpile
* @return string The view with transpiled nodes
* @throws RuntimeException Thrown if the nodes could not be transpiled
*/
protected function transpileNodes(AbstractSyntaxTree $ast)
{
$transpiledView = "";
$rootNode = $ast->getRootNode();
$previousNodeWasExpression = false;
foreach ($rootNode->getChildren() as $childNode) {
switch (get_class($childNode)) {
case DirectiveNode::class:
$transpiledView .= $this->transpileDirectiveNode($childNode);
$previousNodeWasExpression = false;
break;
case SanitizedTagNode::class:
$transpiledView .= $this->transpileSanitizedTagNode($childNode);
$previousNodeWasExpression = false;
break;
case UnsanitizedTagNode::class:
$transpiledView .= $this->transpileUnsanitizedTagNode($childNode);
$previousNodeWasExpression = false;
break;
case CommentNode::class:
$transpiledView .= $this->transpileCommentNode($childNode);
$previousNodeWasExpression = false;
break;
case ExpressionNode::class:
// To keep expressions from running against each other, we pad all expressions but the first
if ($previousNodeWasExpression) {
$transpiledView .= ' ';
}
$transpiledView .= $this->transpileExpressionNode($childNode);
$previousNodeWasExpression = true;
break;
default:
throw new RuntimeException(sprintf("Unknown node class %s", get_class($childNode)));
}
}
return $transpiledView;
}
