MOODLE: WP SSO

local_wpsso.php

<?php
/**
 * @package     local_wpsso
 * @copyright   2018 Raúl Martínez <raul@tresipunt.com>
 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require('../../config.php');
require_once("$CFG->dirroot/group/lib.php");

global $CFG, $USER, $DB, $PAGE, $OUTPUT;
$PAGE->set_url($CFG->wwwroot.'/local/wpsso/automatricula.php');
// Get POST data.
if ($_POST) {
	print_object($_POST);
	if (!$_POST['nombre'] || !$_POST['apellido']
			|| !$_POST['email'] || !$_POST['shortname'] || !$_POST['method'] ) {
		echo 'No se están enviando todos los datos por POST.';
		return 'No se están enviando todos los datos por POST.';
	} else {
		$firstname 			= $_POST['nombre'];
		$lastname  			= $_POST['apellido'];
		$email 				= $_POST['email'];
		$shortname			= $_POST['shortname'];
		$method				= $_POST['method'];
		$username = explode('@', $email);
		$password = 'tobechanged';
	}
} else {
	echo 'El objeto POST no existe.';
	return 'El objeto POST no existe.';
}

	// USER PART.
	// New user, create it.
	if (!$exists = $DB->get_record('user', array('email' => $email))) {
			$user = create_user_record($username[0], $password, $auth = 'manual');
			$user->confirmed = 1;
			$user->email = $email;
			$user->firstname = $firstname;
			$user->lastname = $lastname;

			$DB->update_record('user', $user);
			$userid = $user->id;
			$usernew = $DB->get_record('user', array('id' => $userid));

			$lang = empty($user->lang) ? $CFG->lang : $user->lang;
			$site  = get_site();
			$supportuser = core_user::get_support_user();
			$newpassword = generate_password();
			update_internal_user_password($user, $newpassword, false);

				$a = new stdClass();
				$a->firstname   = fullname($usernew, true);
				$a->sitename    = format_string($site->fullname);
				$a->username    = $usernew->username;
				$a->newpassword = $newpassword;
				$a->link        = $CFG->wwwroot .'/login/';
				$a->signoff     = generate_email_signoff();
				$a->mailformat = 1;
				$message.= '<table><tr><td>'.(string)new lang_string('newusernewpasswordtext', '', $a, $lang).'</td></tr></table>';
				$subject = format_string($site->fullname) .': '. (string)new lang_string('newusernewpasswordsubj', '', $a, $lang);

				unset_user_preference('create_password', $usernew);
				set_user_preference('auth_forcepasswordchange', 1, $usernew);
				email_to_user($usernew, $supportuser, $subject, null, $message);
				echo "<br />Usuario nuevo";
	} else {
		// Existing user. Get id.
		$userid = $exists->id;
		echo "<br />Usuario actualizado";
	}

	// Check if course exists.
	$courseexists = $DB->get_record('course', array('shortname' => $shortname));
	if ($courseexists) {
		$courseid = $courseexists->id;

	} else {
		echo 'El curso con shortname ' . $shortname. ' no existe';
		return 'El curso con shortname ' . $shortname. ' no existe';
	}

	// Enrol.
	$plugin_instance = $DB->get_record("enrol", array('courseid' => $courseid, 'enrol'=>'manual'));
	$plugin = enrol_get_plugin('manual');
	$roleid = $DB->get_field('role', 'id', array('shortname' => 'student'));
	$plugin->enrol_user($plugin_instance, $userid, $roleid);
	echo '<br />Usuario enrolado en ' . $courseid;

	// Create group with 1 person if course is online.
	if ( $method == 'online' ) {
		if ( !$existing = $DB->get_record('groups', ['name' => $email]) ) {
		    $group = new stdClass();
		    $group->courseid = $courseid;
		    $group->timecreated  	= time();
		    $group->timemodified	= $group->timecreated;
		    $group->name         	= $email;
		    $group->id = $DB->insert_record('groups', $group);
		    $groupid = $group->id;
		    $context = context_course::instance($courseid);
		    cache_helper::invalidate_by_definition('core', 'groupdata', array(), array($courseid));
		    // Trigger group event.
		    $params = array(
				'context'		=> $context,
				'objectid'	=> $group->id
		    );
		    $event = \core\event\group_created::create($params);
		    $event->add_record_snapshot('groups', $group);
		    $event->trigger();
		    echo 'Grupo creado: ' . $group->name;
		} else {
			$groupid = $existing->id;
			$groupname = $existing->name;
			echo 'Grupo ' . $groupname . 'ya existente';
		}
		// Add user to group
		groups_add_member($groupid, $userid);
		echo "<br />Usuario incluido en grupo: " . $email;
	}
	return true;
?>

1 - Se crea usuario en plataforma
2 - Se matricula al usuario en ese curso
3 - Se crea un grupo y se añade al usuario que ha comprado el curso dependiendo del tipo de curso (i.e. online)