<?php
/**
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Andreas Gohr <gohr@cosmocode.de>
 */

use dokuwiki\plugin\blogtng\entities\Comment;

/**
 * Class helper_plugin_blogtng_linkback
 */
class helper_plugin_blogtng_linkback extends DokuWiki_Plugin {
    /**
     * @return bool
     */
    public function linkbackAllowed() {
        $entry = $this->getPost();
        return !plugin_isdisabled('blogtng') &&
               $this->getConf('receive_linkbacks') &&
               $entry['blog'] !== '' && $entry['blog'] !== null &&
               $entry['commentstatus'] === 'enabled';
    }

    /**
     * @return array|null
     */
    private function getPost() {
        global $ID;
        /** @var helper_plugin_blogtng_entry $ehelper */
        $ehelper = plugin_load('helper', 'blogtng_entry');
        $ehelper->load_by_pid(md5($ID));
        return $ehelper->entry;
    }

    /**
     * @param $type
     * @param $title
     * @param $sourceUri
     * @param $excerpt
     * @param $id
     * @return bool
     */
    public function saveLinkback($type, $title, $sourceUri, $excerpt, $id) {
        /** @var helper_plugin_blogtng_sqlite $sqlitehelper */
        $sqlitehelper = plugin_load('helper', 'blogtng_sqlite');
        if (!$sqlitehelper->ready()) return false;

        $comment = new Comment();
        $comment->setSource($type);
        $comment->setName($title);
        $comment->setWeb($sourceUri);
        $comment->setText($excerpt);
        $comment->setPid(md5($id));
        $comment->setSubscribe(null);
        $comment->setStatus('hidden');
        $comment->setIp(clientIP(true));


        $query = 'SELECT web, source
                  FROM comments
                  WHERE pid = ?';

        $resid = $sqlitehelper->getDB()->query($query, $comment->getPid());
        if ($resid === false) {
            return false;
        }

        $comments = $sqlitehelper->getDB()->res2arr($resid);

        foreach($comments as $c) {
            if ($c['web'] === $comment->getWeb() && $c['source'] === $comment->getSource()) {
                return false;
            }
        }

        /** @var helper_plugin_blogtng_comments $chelper */
        $chelper = plugin_load('helper', 'blogtng_comments');
        $chelper->save($comment);
        return true;
    }
}