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<?php
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// $Id: Interwiki.php,v 1.1 2005-01-20 19:43:20 jpm Exp $
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/**
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*
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* This class implements a Text_Wiki_Parse to find source text marked as
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* an Interwiki link.  See the regex for a detailed explanation of the
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* text matching procedure; e.g., "InterWikiName:PageName".
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*
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* @author Paul M. Jones <pmjones@ciaweb.net>
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*
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* @package Text_Wiki
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*
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*/
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class Text_Wiki_Parse_Interwiki extends Text_Wiki_Parse {
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    var $regex = '([A-Za-z0-9_]+):([\/=&~#A-Za-z0-9_]+)';
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    /**
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    *
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    * Parser.  We override the standard parser so we can
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    * find both described interwiki links and standalone links.
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    *
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    * @access public
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    *
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    * @return void
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    *
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    */
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    function parse()
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    {
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        // described interwiki links
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        $tmp_regex = '/\[' . $this->regex . ' (.+?)\]/';
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        $this->wiki->source = preg_replace_callback(
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            $tmp_regex,
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            array(&$this, 'processDescr'),
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            $this->wiki->source
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        );
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        // standalone interwiki links
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        $tmp_regex = '/' . $this->regex . '/';
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        $this->wiki->source = preg_replace_callback(
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            $tmp_regex,
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            array(&$this, 'process'),
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            $this->wiki->source
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        );
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    }
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    /**
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    *
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    * Generates a replacement for the matched standalone interwiki text.
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    * Token options are:
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    *
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    * 'site' => The key name for the Text_Wiki interwiki array map,
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    * usually the name of the interwiki site.
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    *
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    * 'page' => The page on the target interwiki to link to.
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    *
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    * 'text' => The text to display as the link.
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    *
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    * @access public
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    *
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    * @param array &$matches The array of matches from parse().
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    *
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    * @return A delimited token to be used as a placeholder in
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    * the source text, plus any text priot to the match.
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    *
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    */
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    function process(&$matches)
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    {
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        $options = array(
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            'site' => $matches[1],
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            'page' => $matches[2],
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            'text' => $matches[0]
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        );
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        return $this->wiki->addToken($this->rule, $options);
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    }
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    /**
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    *
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    * Generates a replacement for described interwiki links. Token
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    * options are:
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    *
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    * 'site' => The key name for the Text_Wiki interwiki array map,
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    * usually the name of the interwiki site.
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    *
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    * 'page' => The page on the target interwiki to link to.
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    *
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    * 'text' => The text to display as the link.
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    *
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    * @access public
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    *
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    * @param array &$matches The array of matches from parse().
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    *
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    * @return A delimited token to be used as a placeholder in
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    * the source text, plus any text priot to the match.
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    *
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    */
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    function processDescr(&$matches)
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    {
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        $options = array(
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            'site' => $matches[1],
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            'page' => $matches[2],
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            'text' => $matches[3]
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        );
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        return $this->wiki->addToken($this->rule, $options);
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    }
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}
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?>