lib.php

<?php
// ---------------------------------------------------------
// block_cmanager 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.
//
// block_cmanager 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/>.
//
// COURSE REQUEST MANAGER BLOCK FOR MOODLE
// by Kyle Goslin & Daniel McSweeney
// Copyright 2012-2018 - Institute of Technology Blanchardstown.
// ---------------------------------------------------------
/**
 * COURSE REQUEST MANAGER
  *
 * @package    block_cmanager
 * @copyright  2018 Kyle Goslin, Daniel McSweeney
 * @copyright  2021-2022 Michael Milette (TNG Consulting Inc.), Daniel Keaman
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

/**
 * Return HTML displaying the names of lecturers linked to email addresses.
 *
 */
function block_cmanager_get_lecturers($courseid){

    global $DB, $CFG;

    if (! $course = $DB->get_record("course", array("id"=>$courseid))) {
         echo get_string('lib_error_invalid_c', 'block_cmanager');
        die;
    }

    $contextid = $DB->get_field('context', 'id', array ('instanceid'=>$courseid, 'contextlevel'=>50), $strictness=IGNORE_MULTIPLE);
    $userids = $DB->get_records('role_assignments',array('roleid' => '3' , 'contextid' => $contextid));

    $lecturerhtml = '';

    foreach ($userids as $singleuser) {
        $user = $DB->get_record('user', array('id'=>$singleuser->userid), $fields='*', $strictness=IGNORE_MULTIPLE);
        $lecturerhtml .=  '<i class="fa fa-envelope-o" aria-hidden="true"></i> <a href="mailto:' . $user->email . '">' . $user->firstname . ' ' . $user->lastname . '</a><br>' ;
    }

    return $lecturerhtml;
}

/**
 * Get a collection of teacher ids (role 3)
 *
 * for a specific course, separated by spaces.
 */
function block_cmanager_get_lecturer_ids_space_sep($courseid) {

    global $DB, $CFG;


    if (! $course = $DB->get_record("course", array("id"=>$courseid))) {
         echo get_string('lib_error_invalid_c', 'block_cmanager');
	    die;
	}

	$contextid = $DB->get_field('context', 'id', array ('instanceid'=>$courseid, 'contextlevel'=>50), $strictness=IGNORE_MULTIPLE);
	$userids = $DB->get_records('role_assignments',array('roleid' => '3' , 'contextid' => $contextid));


	$lecturerhtml = '';

	foreach ($userids as $singleuser) {
	    $user_record = $DB->get_record('user', array('id'=>$singleuser->userid), $fields='*', $strictness=IGNORE_MULTIPLE);
	    $lecturerhtml .=  $user_record->id . ' ' ;
    }

    return $lecturerhtml;

}