<?php

/*

 * This file is part of Twig.

 *

 * (c) 2010 Fabien Potencier

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

/**

 * Imports macros.

 *

 * <pre>

 *   {% from 'forms.html' import forms %}

 * </pre>

 */

class Twig_TokenParser_From extends Twig_TokenParser

{

    /**

     * Parses a token and returns a node.

     *

     * @param Twig_Token $token A Twig_Token instance

     *

     * @return Twig_NodeInterface A Twig_NodeInterface instance

     */

    public function parse(Twig_Token $token)

    {

        $macro = $this->parser->getExpressionParser()->parseExpression();

        $stream = $this->parser->getStream();

        $stream->expect('import');

        $targets = array();

        do {

            $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();

            $alias = $name;

            if ($stream->test('as')) {

                $stream->next();

                $alias = $stream->expect(Twig_Token::NAME_TYPE)->getValue();

            }

            $targets[$name] = $alias;

            if (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ',')) {

                break;

            }

            $stream->next();

        } while (true);

        $stream->expect(Twig_Token::BLOCK_END_TYPE);

        $node = new Twig_Node_Import($macro, new Twig_Node_Expression_AssignName($this->parser->getVarName(), $token->getLine()), $token->getLine(), $this->getTag());

        foreach($targets as $name => $alias) {

            $this->parser->addImportedFunction($alias, $name, $node->getNode('var'));

        }

        return $node;

    }

    /**

     * Gets the tag name associated with this token parser.

     *

     * @param string The tag name

     */

    public function getTag()

    {

        return 'from';

    }

}