Adjust copyrights years

<?php
/**
 * SeekQuarry/Yioop --
 * Open Source Pure PHP Search Engine, Crawler, and Indexer
 *
 * Copyright (C) 2009 - 2020  Chris Pollett chris@pollett.org
 *
 * LICENSE:
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * END LICENSE
 *
 * @author Chris Pollett chris@pollett.org
 * @license https://www.gnu.org/licenses/ GPL3
 * @link https://www.seekquarry.com/
 * @copyright 2009 - 2020
 * @filesource
 */
namespace seekquarry\yioop\views\elements;

use seekquarry\yioop as B;
use seekquarry\yioop\configs as C;

/**
 * Element responsible for drawing footer links on search view and static view
 * pages
 *
 * @author Chris Pollett
 */
class FooterElement extends Element
{
    /**
     * Element used to render the login screen for the admin control panel
     *
     * @param array $data many data from the controller for the footer
     *     (so far none)
     */
    public function render($data)
    {
        $logged_in = isset($data['ADMIN']) && $data['ADMIN'];
        $output_flag = false;
        // below used to handle wiki group page footer
        if (isset($data['PAGE_FOOTER']) && isset($data["HEAD"]['page_type']) &&
            $data["HEAD"]['page_type'] != 'presentation') {
            $group_id = (empty($data["GROUP"]["GROUP_ID"])) ? C\PUBLIC_GROUP_ID:
                $data["GROUP"]["GROUP_ID"];
            ?>
            <div class="current-activity-footer">
            <?= $this->view->element("wiki")->dynamicSubstitutions($group_id,
                $data, $data['PAGE_FOOTER']); ?>
            </div><?php
            return;
        } else if (isset($data["HEAD"]['page_type']) &&
            $data["HEAD"]['page_type'] == 'presentation') {
            return;
        }
        $subsearch = "";
        if (!empty($data['SUBSEARCH'])) {
            $subsearch = "subsearch";
        }
        ?>
        <div class="<?=$subsearch ?> footer-element">
        <?php
        if (tl('footer_element_blog') != 'footer_element_blog') {
            $output_flag = true;
            ?>
            - <a href="<?=B\directUrl('blog') ?>"><?=
            tl('footer_element_blog') ?></a><?php
        }
        ?>
        <?php
        if (tl('footer_element_privacy') != 'footer_element_privacy') {
            $output_flag = true;
            ?>
            - <a href="<?=B\directUrl('privacy') ?>"><?=
            tl('footer_element_privacy') ?></a><?php
        }
        ?>
        <?php
        if (tl('footer_element_terms') != 'footer_element_terms') {
            $output_flag = true;
            ?>
            - <a href="<?=B\directUrl('terms') ?>"><?=
            tl('footer_element_terms') ?></a><?php
        }
        ?>
        <?php
        if (tl('footer_element_bot') != 'footer_element_bot') {
            $output_flag = true;
            ?>
            - <a href="<?=B\directUrl('bot') ?>"><?=
            tl('footer_element_bot') ?></a> <?php if ($_SERVER["MOBILE"]) {
                e('<br /> ');
            }
        }
        if (tl('footer_element_developed_seek_quarry') !=
            'footer_element_developed_seek_quarry') {
            $output_flag = true;
            ?>
            - <a href="https://www.seekquarry.com/"><?=
            tl('footer_element_developed_seek_quarry') ?></a><?php
        }
        if (!empty($data["LOCALE_TAG"]) && $data["LOCALE_TAG"] != 'en-US') { ?>
            - <a href="https://translate.yandex.com/"><?=
            tl('footer_element_translations_yandex') ?></a><?php
        }
        if ($output_flag) {
            e(' -');
        }
        ?>
        </div>
        <div class="<?=$subsearch ?> copyright center">
        <?php
        if (tl('footer_element_copyright_site') !=
            'footer_element_copyright_site') {
            e(tl('footer_element_copyright_site'));
            ?> - <a href="<?=C\BASE_URL ?>"><?=
            tl('footer_element_this_search_engine')
            ?></a><?php
        }
        ?>
        </div>
        <?php
    }
}