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locallib.php
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locallib.php
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<?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/>.
/**
* Local helper library for block plugin block_course_checker.
*
* @package block_course_checker
* @copyright 2019 Adrian Perez, Fernfachhochschule Schweiz (FFHS) <adrian.perez@ffhs.ch>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
global $CFG;
require_once($CFG->libdir . '/classes/plugin_manager.php');
/**
* Helper function to check if dependency plugin is installed and enabled.
*
* @param $dependency
* @return array
*/
function block_course_checker_get_dependency_info($checkername, $dependency) {
$pluginman = core_plugin_manager::instance();
$enbledplugins = $pluginman->get_enabled_plugins($dependency[$checkername]['type']);
if (in_array($dependency[$checkername]['name'], $enbledplugins)) {
$dependency[$checkername]['status'] = true;
} else {
$dependency[$checkername]['status'] = false;
}
return $dependency;
}
/**
* Checks if the user has any of the allowed global system roles.
*
* @param int $userid
* @param string $systemrolesids A comma-separated whitelist of allowed system role ids.
* @return bool
* @throws dml_exception
* @see https://github.com/moodleuulm/moodle-local_boostnavigation/blob/master/locallib.php
*/
function user_has_role_in_system($userid, $systemrolesids) {
// Is the user an admin?
if (is_siteadmin($userid)) {
return true;
}
// Split system role shortnames by comma.
$showforroles = explode(',', $systemrolesids);
// Retrieve the assigned roles for the system context only once and remember for next calls of this function.
static $rolesinsystemids;
if ($rolesinsystemids == null) {
// Get the assigned roles.
$rolesinsystem = get_user_roles(context_system::instance(), $userid);
$rolesinsystemids = [];
foreach ($rolesinsystem as $role) {
array_push($rolesinsystemids, $role->roleid);
}
}
// Check if the user has at least one of the required roles.
return count(array_intersect($rolesinsystemids, $showforroles)) > 0;
}
/**
* Check if user has a allowed role in the course-context.
*
* @param $userid
* @param $courseid
* @param string $roles A comma-separated whitelist of allowed roles ids.
* @return bool
*/
function user_has_given_role_in_course($userid, $courseid, $roles) {
$hasrole = false;
$context = \context_course::instance($courseid);
$roles = explode(',', $roles);
foreach ($roles as $role) {
if (!empty($role)) {
$hasrole = user_has_role_assignment($userid, $role, $context->id);
if ($hasrole) {
break;
}
}
}
return $hasrole;
}
/**
* Check one domain whether it is valid.
* - Extended to allow HTTP/HTTPS protocol.
* - Extended to allow optional port.
* - Extended to allow URL paths.
* Taken from https://stackoverflow.com/a/4694816
*
* @param $domainname
* @return bool
*/
function is_valid_domain_name($domainname) {
return (1 ===
preg_match("/^((http[s]?:\/\/)?[a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*(?::\d+)?(\/[a-z\d.]*)*$/i", $domainname)
// Valid chars.
&& 1 === preg_match("/^.{1,253}$/", $domainname) // Overall length check.
&& 1 === preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $domainname)); // Length of each label.
}