Proyectos de Subversion Moodle

<?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/>.

/**

 * Defines the class for the Message My Teacher block

 *

 * @package    block_messageteacher

 * @author     Mark Johnson <mark@barrenfrozenwasteland.com>

 * @copyright  2010-2012 Tauntons College, UK. 2012 Onwards Mark Johnson

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

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

/**

 * Class definition for the Message My Teacher block

 *

 * @copyright  2010-2012 Tauntons College, UK. 2012 Onwards Mark Johnson

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class block_messageteacher extends block_base {

    /**

     * Initialise the block title.

     */

    public function init() {

        $this->title = get_string('pluginname', 'block_messageteacher');

    }

    /**

     * Set applicable formats, any page except My Moodle.

     */

    public function applicable_formats() {

          return array('all' => true, 'my' => false);

    }

    /**

     * Enable block config.

     *

     * @return true

     */

    public function has_config() {

        return true;

    }

    /**

     * Gets a list of "teachers" with the defined role, and displays a link to message each

     *

     * @return stdClass

     */

    public function get_content() {

        global $COURSE, $USER, $DB, $OUTPUT, $PAGE;

        if ($this->content !== null) {

            return $this->content;

        }

        $this->content = new stdClass;

        $this->content->text = '';

        $this->content->footer = '';

        $usegroups = get_config('block_messageteacher', 'groups');

        $coursehasgroups = groups_get_all_groups($COURSE->id);

        if (get_config('block_messageteacher', 'roles')) {

            $roles = explode(',', get_config('block_messageteacher', 'roles'));

            list($usql, $uparams) = $DB->get_in_or_equal($roles);

            $params = array($COURSE->id, CONTEXT_COURSE);

            $select = 'SELECT DISTINCT u.id, u.firstname, u.lastname, u.firstnamephonetic,

                    u.lastnamephonetic, u.middlename, u.alternatename, u.picture, u.imagealt, u.email ';

            $from = 'FROM {role_assignments} ra

                    JOIN {context} c ON ra.contextid = c.id

                    JOIN {user} u ON u.id = ra.userid ';

            $where = 'WHERE ((c.instanceid = ? AND c.contextlevel = ?)';

            if (get_config('block_messageteacher', 'includecoursecat')) {

                $params = array_merge($params, array($COURSE->category, CONTEXT_COURSECAT));

                $where .= ' OR (c.instanceid = ? AND c.contextlevel = ?))';

            } else {

                $where .= ')';

            }

            $params = array_merge($params, array($USER->id), $uparams);

            $where .= ' AND userid != ? AND roleid '.$usql;

            $order = ' ORDER BY u.firstname ASC, u.lastname';

            if ($teachers = $DB->get_records_sql($select.$from.$where.$order, $params)) {

                if ($usegroups && $coursehasgroups) {

                    try {

                        $groupteachers = array();

                        $usergroupings = groups_get_user_groups($COURSE->id, $USER->id);

                        if (empty($usergroupings)) {

                            throw new Exception('nogroupmembership');

                        } else {

                            foreach ($usergroupings as $usergroups) {

                                if (empty($usergroups)) {

                                    throw new Exception('nogroupmembership');

                                } else {

                                    foreach ($usergroups as $usergroup) {

                                        foreach ($teachers as $teacher) {

                                            if (groups_is_member($usergroup, $teacher->id)) {

                                                $groupteachers[$teacher->id] = $teacher;

                                            }

                                        }

                                    }

                                }

                            }

                            if (empty($groupteachers)) {

                                throw new Exception('nogroupteachers');

                            } else {

                                $teachers = $groupteachers;

                            }

                        }

                    } catch (Exception $e) {

                        $this->content->text = get_string($e->getMessage(), 'block_messageteacher');

                        return $this->content;

                    }

                }

                $items = array();

                foreach ($teachers as $teacher) {

                    $urlparams = array (

                        'courseid' => $COURSE->id,

                        'referurl' => $this->page->url->out(),

                        'recipientid' => $teacher->id

                    );

                    $url = new moodle_url('/blocks/messageteacher/message.php', $urlparams);

                    $picture = '';

                    if (get_config('block_messageteacher', 'showuserpictures')) {

                        $picture = new user_picture($teacher);

                        $picture->link = false;

                        $picture->size = 50;

                        $picture = $OUTPUT->render($picture);

                    }

                    $name = html_writer::tag('span', fullname($teacher));

                    $attrs = [

                        'href' => $url,

                        'class' => 'messageteacher_link',

                        'data-courseid' => $COURSE->id,

                        'data-referurl' => $this->page->url->out(),

                        'data-recipientid' => $teacher->id

                    ];

                    $items[] = html_writer::tag('a', $picture.$name, $attrs);

                }

                $this->content->text = html_writer::alist($items, [

                    'data-contextid' => $this->context->id,

                    'data-appendurl' => get_config('block_messageteacher', 'appendurl'),

                    'data-referurl' => $this->page->url->out(),

                ]);

            }

            $PAGE->requires->js_call_amd('block_messageteacher/form', 'init');

        } else {

            $this->content->text = "No teacher role defined";

        }

        return $this->content;

    }

}