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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/>.
/**
* Theme Boost Union - Local library
*
* @package theme_boost_union
* @copyright 2022 Moodle an Hochschulen e.V. <[email protected]>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
/**
* Build the course related hints HTML code.
* This function evaluates and composes all course related hints which may appear on a course page below the course header.
*
* @copyright 2022 Moodle an Hochschulen e.V. <[email protected]>
* @copyright based on code from theme_boost_campus by Kathrin Osswald.
*
* @return string.
*/
function theme_boost_union_get_course_related_hints() {
global $CFG, $COURSE, $PAGE, $USER, $OUTPUT;
// Require user library.
require_once($CFG->dirroot.'/user/lib.php');
// Initialize HTML code.
$html = '';
// If the setting showhintcoursehidden is set and the visibility of the course is hidden and
// a hint for the visibility will be shown.
if (get_config('theme_boost_union', 'showhintcoursehidden') == THEME_BOOST_UNION_SETTING_SELECT_YES
&& has_capability('theme/boost_union:viewhintinhiddencourse', \context_course::instance($COURSE->id))
&& $PAGE->has_set_url()
&& $PAGE->url->compare(new moodle_url('/course/view.php'), URL_MATCH_BASE)
&& $COURSE->visible == false) {
// Prepare template context.
$templatecontext = array('courseid' => $COURSE->id);
// If the user has the capability to change the course settings, an additional link to the course settings is shown.
if (has_capability('moodle/course:update', context_course::instance($COURSE->id))) {
$templatecontext['showcoursesettingslink'] = true;
} else {
$templatecontext['showcoursesettingslink'] = false;
}
// Render template and add it to HTML code.
$html .= $OUTPUT->render_from_template('theme_boost_union/course-hint-hidden', $templatecontext);
}
// If the setting showhintcourseguestaccess is set and the user is accessing the course with guest access,
// a hint for users is shown.
// We also check that the user did not switch the role. This is a special case for roles that can fully access the course
// without being enrolled. A role switch would show the guest access hint additionally in that case and this is not
// intended.
if (get_config('theme_boost_union', 'showhintcourseguestaccess') == THEME_BOOST_UNION_SETTING_SELECT_YES
&& is_guest(\context_course::instance($COURSE->id), $USER->id)
&& $PAGE->has_set_url()
&& $PAGE->url->compare(new moodle_url('/course/view.php'), URL_MATCH_BASE)
&& !is_role_switched($COURSE->id)) {
// Require self enrolment library.
require_once($CFG->dirroot . '/enrol/self/lib.php');
// Prepare template context.
$templatecontext = array('courseid' => $COURSE->id,
'role' => role_get_name(get_guest_role()));
// Search for an available self enrolment link in this course.
$templatecontext['showselfenrollink'] = false;
$instances = enrol_get_instances($COURSE->id, true);
$plugins = enrol_get_plugins(true);
foreach ($instances as $instance) {
// If the enrolment plugin isn't enabled currently, skip it.
if (!isset($plugins[$instance->enrol])) {
continue;
}
// Remember the enrolment plugin.
$plugin = $plugins[$instance->enrol];
// If there is a self enrolment link.
if ($plugin->show_enrolme_link($instance)) {
$templatecontext['showselfenrollink'] = true;
break;
}
}
// Render template and add it to HTML code.
$html .= $OUTPUT->render_from_template('theme_boost_union/course-hint-guestaccess', $templatecontext);
}
// If the setting showhintcourseselfenrol is set, a hint for users is shown that the course allows unrestricted self
// enrolment. This hint is only shown if the course is visible, the self enrolment is visible and if the user has the
// capability "theme/boost_union:viewhintcourseselfenrol".
if (get_config('theme_boost_union', 'showhintcourseselfenrol') == THEME_BOOST_UNION_SETTING_SELECT_YES
&& has_capability('theme/boost_union:viewhintcourseselfenrol', \context_course::instance($COURSE->id))
&& $PAGE->has_set_url()
&& $PAGE->url->compare(new moodle_url('/course/view.php'), URL_MATCH_BASE)
&& $COURSE->visible == true) {
// Get the active enrol instances for this course.
$enrolinstances = enrol_get_instances($COURSE->id, true);
// Prepare to remember when self enrolment is / will be possible.
$selfenrolmentpossiblecurrently = false;
$selfenrolmentpossiblefuture = false;
foreach ($enrolinstances as $instance) {
// Check if unrestricted self enrolment is possible currently or in the future.
$now = (new \DateTime("now", \core_date::get_server_timezone_object()))->getTimestamp();
if ($instance->enrol == 'self' && empty($instance->password) && $instance->customint6 == 1 &&
(empty($instance->enrolenddate) || $instance->enrolenddate > $now)) {
// Build enrol instance object with all necessary information for rendering the note later.
$instanceobject = new stdClass();
// Remember instance name.
if (empty($instance->name)) {
$instanceobject->name = get_string('pluginname', 'enrol_self') .
" (" . get_string('defaultcoursestudent', 'core') . ")";
} else {
$instanceobject->name = $instance->name;
}
// Remember type of unrestrictedness.
if (empty($instance->enrolenddate) && empty($instance->enrolstartdate)) {
$instanceobject->unrestrictedness = 'unlimited';
$selfenrolmentpossiblecurrently = true;
} else if (empty($instance->enrolstartdate) &&
!empty($instance->enrolenddate) && $instance->enrolenddate > $now) {
$instanceobject->unrestrictedness = 'until';
$selfenrolmentpossiblecurrently = true;
} else if (empty($instance->enrolenddate) &&
!empty($instance->enrolstartdate) && $instance->enrolstartdate > $now) {
$instanceobject->unrestrictedness = 'from';
$selfenrolmentpossiblefuture = true;
} else if (empty($instance->enrolenddate) &&
!empty($instance->enrolstartdate) && $instance->enrolstartdate <= $now) {
$instanceobject->unrestrictedness = 'since';
$selfenrolmentpossiblecurrently = true;
} else if (!empty($instance->enrolstartdate) && $instance->enrolstartdate > $now &&
!empty($instance->enrolenddate) && $instance->enrolenddate > $now) {
$instanceobject->unrestrictedness = 'fromuntil';
$selfenrolmentpossiblefuture = true;
} else if (!empty($instance->enrolstartdate) && $instance->enrolstartdate <= $now &&
!empty($instance->enrolenddate) && $instance->enrolenddate > $now) {
$instanceobject->unrestrictedness = 'sinceuntil';
$selfenrolmentpossiblecurrently = true;
} else {
// This should not happen, thus continue to next instance.
continue;
}
// Remember enrol start date.
if (!empty($instance->enrolstartdate)) {
$instanceobject->startdate = $instance->enrolstartdate;
} else {
$instanceobject->startdate = null;
}
// Remember enrol end date.
if (!empty($instance->enrolenddate)) {
$instanceobject->enddate = $instance->enrolenddate;
} else {
$instanceobject->enddate = null;
}
// Remember this instance.
$selfenrolinstances[$instance->id] = $instanceobject;
}
}
// If there is at least one unrestricted enrolment instance,
// show the hint with information about each unrestricted active self enrolment in the course.
if (!empty($selfenrolinstances) &&
($selfenrolmentpossiblecurrently == true || $selfenrolmentpossiblefuture == true)) {
// Prepare template context.
$templatecontext = array();
// Add the start of the hint t the template context
// depending on the fact if enrolment is already possible currently or will be in the future.
if ($selfenrolmentpossiblecurrently == true) {
$templatecontext['selfenrolhintstart'] = get_string('showhintcourseselfenrolstartcurrently', 'theme_boost_union');
} else if ($selfenrolmentpossiblefuture == true) {
$templatecontext['selfenrolhintstart'] = get_string('showhintcourseselfenrolstartfuture', 'theme_boost_union');
}
// Iterate over all enrolment instances to output the details.
foreach ($selfenrolinstances as $selfenrolinstanceid => $selfenrolinstanceobject) {
// If the user has the capability to config self enrolments, enrich the instance name with the settings link.
if (has_capability('enrol/self:config', \context_course::instance($COURSE->id))) {
$url = new moodle_url('/enrol/editinstance.php', array('courseid' => $COURSE->id,
'id' => $selfenrolinstanceid, 'type' => 'self'));
$selfenrolinstanceobject->name = html_writer::link($url, $selfenrolinstanceobject->name);
}
// Add the enrolment instance information to the template context depending on the instance configuration.
if ($selfenrolinstanceobject->unrestrictedness == 'unlimited') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolunlimited', 'theme_boost_union',
array('name' => $selfenrolinstanceobject->name));
} else if ($selfenrolinstanceobject->unrestrictedness == 'until') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenroluntil', 'theme_boost_union',
array('name' => $selfenrolinstanceobject->name,
'until' => userdate($selfenrolinstanceobject->enddate)));
} else if ($selfenrolinstanceobject->unrestrictedness == 'from') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolfrom', 'theme_boost_union',
array('name' => $selfenrolinstanceobject->name,
'from' => userdate($selfenrolinstanceobject->startdate)));
} else if ($selfenrolinstanceobject->unrestrictedness == 'since') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolsince', 'theme_boost_union',
array('name' => $selfenrolinstanceobject->name,
'since' => userdate($selfenrolinstanceobject->startdate)));
} else if ($selfenrolinstanceobject->unrestrictedness == 'fromuntil') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolfromuntil', 'theme_boost_union',
array('name' => $selfenrolinstanceobject->name,
'until' => userdate($selfenrolinstanceobject->enddate),
'from' => userdate($selfenrolinstanceobject->startdate)));
} else if ($selfenrolinstanceobject->unrestrictedness == 'sinceuntil') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolsinceuntil', 'theme_boost_union',
array('name' => $selfenrolinstanceobject->name,
'until' => userdate($selfenrolinstanceobject->enddate),
'since' => userdate($selfenrolinstanceobject->startdate)));
}
}
// If the user has the capability to config self enrolments, add the call for action to the template context.
if (has_capability('enrol/self:config', \context_course::instance($COURSE->id))) {
$templatecontext['calltoaction'] = true;
} else {
$templatecontext['calltoaction'] = false;
}
// Render template and add it to HTML code.
$html .= $OUTPUT->render_from_template('theme_boost_union/course-hint-selfenrol', $templatecontext);
}
}
// If the setting showswitchedroleincourse is set and the user has switched his role,
// a hint for the role switch will be shown.
if (get_config('theme_boost_union', 'showswitchedroleincourse') === THEME_BOOST_UNION_SETTING_SELECT_YES
&& is_role_switched($COURSE->id) ) {
// Get the role name switched to.
$opts = \user_get_user_navigation_info($USER, $PAGE);
$role = $opts->metadata['rolename'];
// Get the URL to switch back (normal role).
$url = new moodle_url('/course/switchrole.php',
array('id' => $COURSE->id,
'sesskey' => sesskey(),
'switchrole' => 0,
'returnurl' => $PAGE->url->out_as_local_url(false)));
// Prepare template context.
$templatecontext = array('role' => $role,
'url' => $url->out());
// Render template and add it to HTML code.
$html .= $OUTPUT->render_from_template('theme_boost_union/course-hint-switchedrole', $templatecontext);
}
// Return HTML code.
return $html;
}
/**
* Build the link to the imprint page.
*
* @return string.
*/
function theme_boost_union_get_imprint_link() {
// Compose the URL object.
$url = new moodle_url('/theme/boost_union/pages/imprint.php');
// Return the string representation of the URL.
return $url->out();
}
/**
* Build the page title of the imprint page.
*
* @return string.
*/
function theme_boost_union_get_imprint_pagetitle() {
// Get the configured page title.
$imprintpagetitleconfig = get_config('theme_boost_union', 'imprintpagetitle');
// If there is a string configured.
if ($imprintpagetitleconfig) {
// Return this setting.
return $imprintpagetitleconfig;
// Otherwise.
} else {
// Return the default string.
return get_string('imprintpagetitledefault', 'theme_boost_union');
}
}
/**
* Helper function to check if a given info banner should be shown on this page.
* This function checks
* a) if the banner is enabled at all
* b) if the banner has any content (i.e. is not empty)
* b) if the banner is configured to be shown on the given page
* c) if the banner is configured to be shown now (in case it is a time-based banner)
*
* @copyright 2022 Moodle an Hochschulen e.V. <[email protected]>
* @copyright based on code from theme_boost_campus by Kathrin Osswald.
*
* @param int $bannerno The counting number of the info banner.
*
* @return boolean.
*/
function theme_boost_union_infobanner_is_shown_on_page($bannerno) {
global $PAGE;
// Get theme config.
$config = get_config('theme_boost_union');
// If the info banner is enabled.
$enabledsettingname = 'infobanner'.$bannerno.'enabled';
if ($config->{$enabledsettingname} == THEME_BOOST_UNION_SETTING_SELECT_YES) {
// If the info banner has any content.
$contentsettingname = 'infobanner'.$bannerno.'content';
if (!empty($config->{$contentsettingname})) {
// If the info banner should be shown on this page.
$pagessettingname = 'infobanner'.$bannerno.'pages';
$showonpage = false;
$pages = explode(',', $config->{$pagessettingname});
foreach ($pages as $page) {
if ($PAGE->pagelayout == $page) {
$showonpage = true;
break;
}
}
if ($showonpage == true) {
// If this is a time-based-banner.
$modesettingname = 'infobanner'.$bannerno.'mode';
if ($config->{$modesettingname} == THEME_BOOST_UNION_SETTING_INFOBANNERMODE_TIMEBASED) {
$startsettingname = 'infobanner'.$bannerno.'start';
$endsettingname = 'infobanner'.$bannerno.'end';
// Check if time settings are empty and try to convert the time strings to a unix timestamp.
if (empty($config->{$startsettingname})) {
$startempty = true;
$start = 0;
} else {
$startempty = false;
$start = $config->{$startsettingname};
}
if (empty($config->{$endsettingname})) {
$endempty = true;
$end = 0;
} else {
$endempty = false;
$end = $config->{$endsettingname};
}
// The banner is shown if
// a) now is between start and end time OR
// b) start is not set but end is not reached yet OR
// c) end is not set, but start lies in the past OR
// d) no dates are set, so there's no time restriction.
$now = time();
if (($now >= $start && $now <= $end ||
($now <= $end && $startempty) ||
($now >= $start && $endempty) ||
($startempty && $endempty))) {
return true;
}
// Otherwise this is a perpetual banner.
} else {
// If the banner was not dismissed by the user.
if (get_user_preferences('theme_boost_union_infobanner'.$bannerno.'_dismissed') != true) {
return true;
}
}
}
}
}
// Apparently, the banner should not be shown on this page.
return false;
}
/**
* Helper function to compare two infobanner orders.
*
* @param int $a The first value
* @param int $b The second value
*
* @return boolean.
*/
function theme_boost_union_infobanner_compare_order($a, $b) {
if ($a->order == $b->order) {
// Basically, we should return 0 in this case.
// But due to the way how usort works internally, info banners with the same order would end up in the result array
// in reversed order (compared to the numbering order on the theme settings page).
// Thus, we do a little trick and tell the sorting algorithm that the first item is greater than the second one
// by returning a positive number.
return 1;
}
return ($a->order < $b->order) ? -1 : 1;
}
/**
* Helper function to reset the visibility of a given info banner.
*
* @param int $no The number of the info banner.
*
* @return bool True if everything went fine, false if at least one user couldn't be resetted.
*/
function theme_boost_union_infobanner_reset_visibility($no) {
global $DB;
// Clean the no parameter, just to be sure as we will use it within a user preference label (hence in a SQL query).
$no = clean_param($no, PARAM_INT);
// Get all users that have dismissed the info banner once and therefore the user preference.
$whereclause = 'name = :name AND value = :value';
$params = ['name' => 'theme_boost_union_infobanner'.$no.'_dismissed', 'value' => '1'];
$users = $DB->get_records_select('user_preferences', $whereclause, $params, '', 'userid');
// Initialize variable for feedback messages.
$somethingwentwrong = false;
// Store coding exception.
$codingexception[] = array();
foreach ($users as $user) {
try {
unset_user_preference('theme_boost_union_infobanner'.$no.'_dismissed', $user->userid);
} catch (coding_exception $e) {
$somethingwentwrong = true;
}
}
if (!$somethingwentwrong) {
return true;
} else {
return false;
}
}