<?php
/**
 * DokuWiki Plugin top (Syntax Component)
 *
 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
 * @author  Andreas Gohr <gohr@cosmocode.de>
 */

class syntax_plugin_top extends DokuWiki_Syntax_Plugin {
    /**
     * @return string Syntax mode type
     */
    public function getType()
    {
        return 'protected';
    }

    /**
     * @return int Sort order - Low numbers go before high numbers
     */
    public function getSort()
    {
        return 200;
    }

    /**
     * Connect lookup pattern to lexer.
     *
     * @param string $mode Parser mode
     */
    public function connectTo($mode)
    {
        $this->Lexer->addSpecialPattern('\\{\\{top(?:\|.+?)?\\}\\}', $mode, 'plugin_top');
    }

    /**
     * Handle matches of the top syntax
     *
     * @param string $match The match of the syntax
     * @param int $state The state of the handler
     * @param int $pos The position in the document
     * @param Doku_Handler $handler The handler
     * @return array Data for the renderer
     */
    public function handle($match, $state, $pos, Doku_Handler $handler)
    {
        if ($state==DOKU_LEXER_SPECIAL) {
            $options = array('lang' => null, 'month' => null, 'tag' => 'ul', 'score' => 'false' );
            $match = rtrim($match,'\}');
            $match = substr($match,5);
            if ($match != '') {
                $match = ltrim($match,'\|');
                $match = explode(",", $match);
                foreach ($match as $option) {
                    list($key, $val) = explode('=', $option);
                    $options[$key] = $val;
                }
            }
            return array($state, $options);
        } else {
            return array($state, '');
        }
    }

    /**
     * Render xhtml output or metadata
     *
     * @param string $mode Renderer mode (supported modes: xhtml)
     * @param Doku_Renderer $renderer The renderer
     * @param array $data The data from the handler() function
     * @return bool If rendering was successful.
     */
    public function render($mode, Doku_Renderer $renderer, $data)
    {
        if ($mode == 'metadata') return false;
        if ($data[0] != DOKU_LEXER_SPECIAL) return false;

        /** @var helper_plugin_top $hlp */
        $hlp  = plugin_load('helper', 'top');
        $list = $hlp->best($data[1]['lang'], $data[1]['month'], 20);

        if ($data[1]['tag'] == 'ol') {
            $renderer->listo_open();
        } else {
            $renderer->listu_open();
        }

        $num_items=0;
        foreach ($list as $item) {
            if (!$hlp->isReadable($item['page'])) continue;
            $num_items = $num_items +1;
            $renderer->listitem_open(1);
            if (strpos($item['page'], ':') === false) {
                $item['page'] = ':' . $item['page'];
            }
            $renderer->internallink($item['page']);
            if ($data[1]['score'] === 'true') $renderer->cdata(' (' . $item['value'] . ')');
            $renderer->listitem_close();
            if ($num_items >= 10) break;
        }

        if ($data[1]['tag'] == 'ol') {
            $renderer->listo_close();
        } else {
            $renderer->listu_close();
        }
        return true;
    }
}
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