moodle/blocks/activity_modules/block_activity_modules.php

<?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/>.

/**
 * This file contains the Activity modules block.
 *
 * @package    block_activity_modules
 * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir . '/filelib.php');

class block_activity_modules extends block_list {
    function init() {
        $this->title = get_string('pluginname', 'block_activity_modules');
    }

    function get_content() {
        global $CFG, $DB, $OUTPUT;

        if($this->content !== NULL) {
            return $this->content;
        }

        $this->content = new stdClass;
        $this->content->items = array();
        $this->content->icons = array();
        $this->content->footer = '';

        $course = $this->page->course;

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

        $modinfo = get_fast_modinfo($course);
        $modfullnames = array();

        $archetypes = array();

        foreach($modinfo->cms as $cm) {
            // Exclude activities which are not visible or have no link (=label)
            if (!$cm->uservisible or !$cm->has_view()) {
                continue;
            }
            if (array_key_exists($cm->modname, $modfullnames)) {
                continue;
            }
            if (!array_key_exists($cm->modname, $archetypes)) {
                $archetypes[$cm->modname] = plugin_supports('mod', $cm->modname, FEATURE_MOD_ARCHETYPE, MOD_ARCHETYPE_OTHER);
            }
            if ($archetypes[$cm->modname] == MOD_ARCHETYPE_RESOURCE) {
                if (!array_key_exists('resources', $modfullnames)) {
                    $modfullnames['resources'] = get_string('resources');
                }
            } else {
                $modfullnames[$cm->modname] = $cm->modplural;
            }
        }

        core_collator::asort($modfullnames);

        foreach ($modfullnames as $modname => $modfullname) {
            if ($modname === 'resources') {
                $icon = $OUTPUT->pix_icon('icon', '', 'mod_page', array('class' => 'icon'));
                $this->content->items[] = '<a href="'.$CFG->wwwroot.'/course/resources.php?id='.$course->id.'">'.$icon.$modfullname.'</a>';
            } else {
                $icon = '<img src="'.$OUTPUT->pix_url('icon', $modname) . '" class="icon" alt="" />';
                $this->content->items[] = '<a href="'.$CFG->wwwroot.'/mod/'.$modname.'/index.php?id='.$course->id.'">'.$icon.$modfullname.'</a>';
            }
        }

        return $this->content;
    }

    /**
     * Returns the role that best describes this blocks contents.
     *
     * This returns 'navigation' as the blocks contents is a list of links to activities and resources.
     *
     * @return string 'navigation'
     */
    public function get_aria_role() {
        return 'navigation';
    }

    function applicable_formats() {
        return array('all' => true, 'mod' => false, 'my' => false, 'admin' => false,
                     'tag' => false);
    }
}