<?php

/**
 * DokuWiki Plugin struct (Syntax Component)
 *
 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
 * @author  Andreas Gohr, Michael Große <dokuwiki@cosmocode.de>
 */

use dokuwiki\plugin\struct\meta\AggregationCloud;
use dokuwiki\plugin\struct\meta\ConfigParser;
use dokuwiki\plugin\struct\meta\Filter;
use dokuwiki\plugin\struct\meta\SearchConfig;
use dokuwiki\plugin\struct\meta\StructException;

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

    /**
     * @return string Paragraph type
     */
    public function getPType()
    {
        return 'block';
    }

    /**
     * @return int Sort order - Low numbers go before high numbers
     */
    public function getSort()
    {
        return 155;
    }

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

    /**
     * Handle matches of the struct 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)
    {
        global $conf;
        $lines = explode("\n", $match);
        array_shift($lines);
        array_pop($lines);

        try {
            $parser = new ConfigParser($lines);
            return $parser->getConfig();
        } catch (StructException $e) {
            msg($e->getMessage(), -1, $e->getLine(), $e->getFile());
            if ($conf['allowdebug']) msg('<pre>' . hsc($e->getTraceAsString()) . '</pre>', -1);
            return null;
        }
    }

    /**
     * Render filter form
     *
     * @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 != 'xhtml') return false;

        global $conf;

        $lang = [
            'title' => $this->getLang('filter_title'),
            'intro' => $this->getLang('filter_intro'),
            'button' => $this->getLang('filter_button')
        ];

        try {
            $search = new SearchConfig($data);
            $filter = new Filter($renderer, $search);

            $filter->render($lang);

            if ($mode === 'metadata') {
                /** @var Doku_Renderer_metadata $renderer */
                $renderer->meta['plugin']['struct']['hasaggregation'] = $search->getCacheFlag();
            }
        } catch (StructException $e) {
            msg($e->getMessage(), -1, $e->getLine(), $e->getFile());
            if ($conf['allowdebug']) msg('<pre>' . hsc($e->getTraceAsString()) . '</pre>', -1);
        }

        return true;
    }
}