<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * renderers/core_renderer.php
 * @package    theme_qualisaude
 * @copyright  2015 onwards LMSACE Dev Team (http://www.lmsace.com)
 * @author    LMSACE Dev Team
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

/**
 * qualisaude core renderer renderer from the moodle core renderer
 * @copyright  2015 onwards LMSACE Dev Team (http://www.lmsace.com)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class theme_qualisaude_core_renderer extends theme_boost\output\core_renderer {
    /**
     * Custom menu in header.
     * @param custom_menu $menu
     * @return type
     */
    public function custom_menu_render(custom_menu $menu) {
        global $CFG;

        $langs = get_string_manager()->get_list_of_translations();
        $haslangmenu = $this->lang_menu() != '';

        if (!$menu->has_children() && !$haslangmenu) {
            return '';
        }

        $content = '';
        foreach ($menu->get_children() as $item) {
            $context = $item->export_for_template($this);
            $content .= $this->render_from_template('theme_qualisaude/custom_menu_item', $context);
        }

        return $content;
    }

    /**
     * This renders the navbar.
     * Uses bootstrap compatible html.
     */
    public function breadscrumb() {
//        print_object($this->page->navbar);
        return $this->render_from_template('theme_qualisaude/breadscrumb', $this->page->navbar);
    }

    /**
     * Wrapper for header elements.
     *
     * @return string HTML to display the main header.
     */
    public function edit_buttons() {
        global $PAGE;

        $header = new stdClass();
        $header->settingsmenu = $this->context_header_settings_menu();
        $header->contextheader = $this->context_header();
        $header->hasnavbar = empty($PAGE->layout_options['nonavbar']);
        $header->navbar = $this->navbar();
        $header->pageheadingbutton = $this->page_heading_button();
        $header->courseheader = $this->course_header();
        return $this->render_from_template('theme_qualisaude/edit_buttons', $header);
    }

    /**
     * Extract first image from html
     *
     * @param string $html (must be well formed)
     * @return array | bool (false)
     */
    public static function extract_first_image($html) {
        $doc = new \DOMDocument();
        libxml_use_internal_errors(true); // Required for HTML5.
        $doc->loadHTML($html);
        libxml_clear_errors(); // Required for HTML5.
        $imagetags = $doc->getElementsByTagName('img');
        if ($imagetags->item(0)) {
            $src = $imagetags->item(0)->getAttribute('src');
            $alt = $imagetags->item(0)->getAttribute('alt');
            return array('src' => $src, 'alt' => $alt);
        } else {
            return false;
        }
    }

    /**
     * Alternative rendering of front page news, called from layout/faux_site_index.php which
     * replaces the standard news output with this.
     *
     * @return string
     */
    public function site_frontpage_news() {
        global $CFG, $SITE;

        require_once($CFG->dirroot.'/mod/forum/lib.php');

        if (!$forum = forum_get_course_forum($SITE->id, 'news')) {
            print_error('cannotfindorcreateforum', 'forum');
        }

        $cm      = get_coursemodule_from_instance('forum', $forum->id, $SITE->id, false, MUST_EXIST);
        $context = \context_module::instance($cm->id, MUST_EXIST);

        $output  = html_writer::start_tag('div', array('id' => 'site-news-forum', 'class' => 'clearfix'));
        $output .= $this->heading(format_string('Notícias', true, array('context' => $context)), 2,'titulo');

        $groupmode    = groups_get_activity_groupmode($cm, $SITE);
        $currentgroup = groups_get_activity_group($cm);

        if (!$discussions = forum_get_discussions($cm,
            'p.modified DESC', true, null, $SITE->newsitems, false, -1, $SITE->newsitems)) {
            $output .= html_writer::tag('div', '('.get_string('nonews', 'forum').')', array('class' => 'forumnodiscuss'));

            if (forum_user_can_post_discussion($forum, $currentgroup, $groupmode, $cm, $context)) {
                $output .= html_writer::link(
                    new moodle_url('/mod/forum/post.php', array('forum' => $forum->id)),
                    'Adicionar notícia',
                    array('class' => 'btn btn-primary')
                );
            } else {
                // No news and user cannot edit, so return nothing.
                return 'Nenhuma notícia cadastrada';
            }

            return $output.'</div>';
        }

        $output .= html_writer::start_div('', array('id' => 'news-articles'));
        foreach ($discussions as $discussion) {
            if (!forum_user_can_see_discussion($forum, $discussion, $context)) {
                continue;
            }
            $message    = file_rewrite_pluginfile_urls($discussion->message,
                'pluginfile.php', $context->id, 'mod_forum', 'post', $discussion->id);

            $imagestyle = '';

            $imgarr = $this->extract_first_image($message);
            if ($imgarr) {
                $imageurl   = s($imgarr['src']);
                $imagestyle = " style=\"background-image:url('$imageurl')\"";
            }

            $name    = format_string($discussion->name, true, array('context' => $context));
            $date    = userdate($discussion->timemodified, get_string('strftimedatetime', 'langconfig'));

            $message = format_text($message, $discussion->messageformat, ['context' => $context]);

            $readmorebtn = "<a class='btn btn-secondary toggle' href='".
                $CFG->wwwroot."/mod/forum/discuss.php?d=".$discussion->discussion."'>Saiba mais</a>";

            $preview = '';
            $newsimage = '';
            if (!$imagestyle) {
                $preview = html_to_text($message, 0, false);
                $preview = "<div class='news-article-preview'><p>".shorten_text($preview, 200)."</p>";
//                $preview .= "<p class='text-right'>".$readmorebtn."</p>";
                $preview .= "</div>";
            } else {
                $newsimage = '<div class="news-article-image toggle"'.$imagestyle.' title="Saiba mais"></div>';
            }
            $close = get_string('closebuttontitle', 'moodle');
            $output .= <<<HTML
<div class="news-article clearfix">
    <div class="news-article-inner">
        <div class="news-article-content">
            <h3 class='toggle'><a href="$CFG->wwwroot/mod/forum/discuss.php?d=$discussion->discussion">{$name}</a></h3>
        </div>
    </div>
    {$preview}

</div>
HTML;
        }
//        $actionlinks = html_writer::link(
//            new moodle_url('/mod/forum/view.php', array('id' => $cm->id)),
//            'Mais notícias',
//            array('class' => 'btn btn-secondary')
//        );
//        if (forum_user_can_post_discussion($forum, $currentgroup, $groupmode, $cm, $context)) {
//            $actionlinks .= html_writer::link(
//                new moodle_url('/mod/forum/post.php', array('forum' => $forum->id)),
//                'Nova notícia',
//                array('class' => 'btn btn-primary')
//            );
//        }
        $output .= html_writer::end_div();
//        $output .= "<br><div class='text-center'>$actionlinks</div>";
        $output .= html_writer::end_tag('div');

        return $output;
    }


}