<?php

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

/**
 * This is a like smarty function. It sets a thumb button link that allows you to like (and unlike) an object. It also
 * provides a count of likes thus far on that particular object.
 * @param $params
 *  - type - sets the type of object being liked. Ex: trackeritem, wiki, article, etc
 *  - object - sets the id of the object being liked.
 *  - count_label - default "Likes" - sets the label after the count. Ex: "recommendations" would show "54 recommendations" instead of |Likes"
 *  - count_only - default 'false' - sets whether to only show the count.
 *
 * @param $smarty
 * @return string|void
 * @throws Exception
 */
function smarty_function_like($params, $smarty)
{
    global $prefs, $user;

    $smarty = TikiLib::lib('smarty');

    // unregistered user, do nothing
    if (empty($user) || $prefs['user_likes'] != 'y') {
        return;
    }
    if (empty($params['count_label'])) {
        $count_label = "Likes";
    } else {
        $count_label = $params['count_label'];
    }
    if (empty($params['count_only'])) {
        $count_only = false;
    } else {
        $count_only = $params['count_only'];
    }

    $relation = "tiki.user.like";
    $relationlib = TikiLib::lib("relation");
    //if relation exists
    $relation_id = $relationlib->get_relation_id($relation, "user", $user, $params['type'], $params['object']);
    if ($relation_id) {
        $smarty->assign('has_relation', true);
    } else {
        $smarty->assign('has_relation', false);
    }
    $count = $relationlib->get_relation_count("tiki.user.like", $params['type'], $params['object']);

    $smarty->assign('type', $params['type']);
    $smarty->assign('object', $params['object']);
    $smarty->assign('count', $count);
    $smarty->assign('count_label', $count_label);
    $smarty->assign('count_only', $count_only);
    return $smarty->fetch('like.tpl');
}