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Parser.php
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Parser.php
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<?php
/**
* (c) Masoud Zohrabi <mdzzohrabi@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Azera\Fry;
use Azera\Fry\Exception\Exception;
use Azera\Fry\Node\Template;
use Azera\Fry\Parser\ExpressionParser;
use Azera\Fry\Parser\ParserInterface;
/**
* Class Parser
*
* @package Azera\Fry
* @author Masoud Zohrabi <mdzzohrabi@gmail.com>
*/
class Parser
{
/**
* @var TokenStream
*/
protected $stream;
/**
* @var ParserInterface[]
*/
protected $parsers;
/**
* @var Node[]
*/
protected $blocks = [];
/**
* @var Node[]
*/
protected $macros = [];
/**
* @var Node
*/
protected $parent;
/**
* @var ExpressionParser
*/
protected $expressionParser;
/**
* @var Environment
*/
private $environment;
public function __construct( TokenStream $stream , Environment $environment )
{
# Token stream
$this->stream = $stream;
# Expression parser
$this->expressionParser = new ExpressionParser( $this );
# Parsers
$this->parsers = [
new Parser\TextParser(),
new Parser\PrintParser(),
new Parser\SectionParser( $environment ),
new Parser\CommentParser()
];
$this->environment = $environment;
}
/**
* @return TokenStream
*/
public function getStream() {
return $this->stream;
}
public function parse() {
$body = $this->subparse();
return new Template( $this->stream->getFileName() , $this->parent , $body , $this->blocks , $this->macros );
}
public function subparse( $test = null ) {
$nodes = [];
while ( !$this->stream->isEOF() ) {
$token = $this->stream->getToken();
$node = null;
if ( $token->test([ TokenTypes::T_CODE_BLOCK , TokenTypes::T_EOF ]) ) {
$this->stream->next();
continue;
}
if ( $test && call_user_func( $test , $this->stream ) )
break;
$found = false;
foreach ($this->parsers as $parser)
if ( $parser->canParse( $token , $this ) ) {
$found = true;
$node = $parser->parse( $token , $this );
break;
}
if ( !$found )
throw new Exception( 'Syntax error, invalid syntax \'%s\' (%s) on line %d column %d' , $token->getValue() , $token->getTokenName() , $token->getLine() , $token->getColumn() );
if ( $node )
$nodes[] = $node;
}
return new Node( $nodes , [] , 0 );
}
public function parseExpression() {
return $this->expressionParser->parseExpression();
}
/**
* @param Node $parentNode
* @return $this
*/
public function setParent( $parentNode ) {
$this->parent = $parentNode;
return $this;
}
/**
* @return Node
*/
public function getParent() {
return $this->parent;
}
/**
* @param $name
* @param $macro
* @return $this
*/
public function setMacro( $name , $macro ) {
$this->macros[ $name ] = $macro;
return $this;
}
/**
* @param $name
* @return Node
*/
public function getMacro( $name ) {
return $this->macros[ $name ];
}
/**
* @param string $name
* @param Node $blockNode
* @return $this
*/
public function setBlock( $name , $blockNode ) {
$this->blocks[ $name ] = $blockNode;
return $this;
}
/**
* @param $name
* @return Node
*/
public function getBlock( $name ) {
return $this->blocks[ $name ];
}
/**
* @return ExpressionParser
*/
public function getExpressionParser()
{
return $this->expressionParser;
}
/**
* @return Environment
*/
public function getEnvironment()
{
return $this->environment;
}
}