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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 Alexander Bias, lern.link GmbH <alexander.bias@lernlink.de>
* @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 Alexander Bias, lern.link GmbH <alexander.bias@lernlink.de>
* @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 = ['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 = ['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.
$templatecontext = [];
// Add the start of the hint t the template context
// depending on the fact if enrolment is already possible currently or will be in the future.
if ($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', ['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',
['name' => $selfenrolinstanceobject->name]);
} else if ($selfenrolinstanceobject->unrestrictedness == 'until') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenroluntil', 'theme_boost_union',
['name' => $selfenrolinstanceobject->name,
'until' => userdate($selfenrolinstanceobject->enddate), ]);
} else if ($selfenrolinstanceobject->unrestrictedness == 'from') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolfrom', 'theme_boost_union',
['name' => $selfenrolinstanceobject->name,
'from' => userdate($selfenrolinstanceobject->startdate), ]);
} else if ($selfenrolinstanceobject->unrestrictedness == 'since') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolsince', 'theme_boost_union',
['name' => $selfenrolinstanceobject->name,
'since' => userdate($selfenrolinstanceobject->startdate), ]);
} else if ($selfenrolinstanceobject->unrestrictedness == 'fromuntil') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolfromuntil', 'theme_boost_union',
['name' => $selfenrolinstanceobject->name,
'until' => userdate($selfenrolinstanceobject->enddate),
'from' => userdate($selfenrolinstanceobject->startdate), ]);
} else if ($selfenrolinstanceobject->unrestrictedness == 'sinceuntil') {
$templatecontext['selfenrolinstances'][] = get_string('showhintcourseselfenrolsinceuntil', 'theme_boost_union',
['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',
['id' => $COURSE->id,
'sesskey' => sesskey(),
'switchrole' => 0,
'returnurl' => $PAGE->url->out_as_local_url(false), ]);
// Prepare template context.
$templatecontext = ['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 a static page.
*
* @param string $page The static page's identifier.
* @return string.
*/
function theme_boost_union_get_staticpage_link($page) {
// Compose the URL object.
$url = new moodle_url('/theme/boost_union/pages/'.$page.'.php');
// Return the string representation of the URL.
return $url->out();
}
/**
* Build the page title of a static page.
*
* @param string $page The static page's identifier.
* @return string.
*/
function theme_boost_union_get_staticpage_pagetitle($page) {
// Get the configured page title.
$pagetitleconfig = format_string(get_config('theme_boost_union', $page.'pagetitle'), true,
['context' => \context_system::instance()]);
// If there is a string configured.
if ($pagetitleconfig) {
// Return this setting.
return $pagetitleconfig;
// Otherwise.
} else {
// Return the default string.
return get_string($page.'pagetitledefault', '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 Alexander Bias, lern.link GmbH <alexander.bias@lernlink.de>
* @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 either infobanner or tiles orders.
*
* @param int $a The first value
* @param int $b The second value
*
* @return boolean.
*/
function theme_boost_union_compare_order($a, $b) {
// If the same 'order' attribute is given to both items.
if ($a->order == $b->order) {
// We have to compare the 'no' attribute.
// This way, we make sure that the item which is presented first in the admin settings is still placed first in the
// ordered list even if the same order is configured.
return ($a->no < $b->no) ? -1 : 1;
}
// Otherwise, compare both items based on their 'order' attribute.
return ($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.
$codingexception[] = [];
foreach ($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;
}
}
/**
* Get the random number for displaying the background image on the login page randomly.
*
* @return int|null
* @throws coding_exception
* @throws dml_exception
*/
function theme_boost_union_get_random_loginbackgroundimage_number() {
// Static variable.
static $number = null;
if ($number == null) {
// Get all files for loginbackgroundimages.
$files = theme_boost_union_get_loginbackgroundimage_files();
// Get count of array elements.
$filecount = count($files);
// We only return a number if images are uploaded to the loginbackgroundimage file area.
if ($filecount > 0) {
// If Behat tests are running.
if (defined('BEHAT_SITE_RUNNING')) {
// Select the last image (to make Behat tests work).
$number = $filecount;
} else {
// Generate random number.
$number = rand(1, $filecount);
}
}
}
return $number;
}
/**
* Get a random class for body tag for the background image of the login page.
*
* @return string
*/
function theme_boost_union_get_random_loginbackgroundimage_class() {
// Get the static random number.
$number = theme_boost_union_get_random_loginbackgroundimage_number();
// Only create the class name with the random number if there is a number (=files uploaded to the file area).
if ($number != null) {
return 'loginbackgroundimage'.$number;
} else {
return '';
}
}
/**
* Return the files from the loginbackgroundimage file area.
* This function always loads the files from the filearea which is not really performant.
* However, we accept this at the moment as it is only invoked on the login page.
*
* @return array|null
* @throws coding_exception
* @throws dml_exception
*/
function theme_boost_union_get_loginbackgroundimage_files() {
// Static variable to remember the files for subsequent calls of this function.
static $files = null;
if ($files == null) {
// Get the system context.
$systemcontext = \context_system::instance();
// Get filearea.
$fs = get_file_storage();
// Get all files from filearea.
$files = $fs->get_area_files($systemcontext->id, 'theme_boost_union', 'loginbackgroundimage',
false, 'itemid', false);
}
return $files;
}
/**
*
* Get the advertisement tile's background image URL from the filearea 'tilebackgroundimage'.tileno.
*
* Note:
* Calling this function for each tile separately is maybe not performant. Originally it was planed to put
* all files in one filearea. However, at the time of development
* https://github.com/moodle/moodle/blob/master/lib/outputlib.php#L2062
* did not support itemids in setting-files of themes.
*
* @param int $tileno The tile number.
* @return string|null
*/
function theme_boost_union_get_urloftilebackgroundimage($tileno) {
// If the tile number is apparently not valid, return.
// Note: We just check the tile's number, we do not check if the tile is enabled or not.
if ($tileno < 0 || $tileno > THEME_BOOST_UNION_SETTING_ADVERTISEMENTTILES_COUNT) {
return null;
}
// Get the background image config for this tile.
$bgconfig = get_config('theme_boost_union', 'tile'.$tileno.'backgroundimage');
// If a background image is configured.
if (!empty($bgconfig)) {
// Get the system context.
$systemcontext = context_system::instance();
// Get filearea.
$fs = get_file_storage();
// Get all files from filearea.
$files = $fs->get_area_files($systemcontext->id, 'theme_boost_union', 'tilebackgroundimage'.$tileno,
false, 'itemid', false);
// Just pick the first file - we are sure that there is just one file.
$file = reset($files);
// Build and return the image URL.
return moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(), $file->get_filearea(),
$file->get_itemid(), $file->get_filepath(), $file->get_filename());
}
// As no image was found, return null.
return null;
}
/**
* Add background images from setting 'loginbackgroundimage' to SCSS.
*
* @return string
*/
function theme_boost_union_get_loginbackgroundimage_scss() {
// Initialize variables.
$count = 0;
$scss = '';
// Get all files from filearea.
$files = theme_boost_union_get_loginbackgroundimage_files();
// Add URL of uploaded images to equivalent class.
foreach ($files as $file) {
$count++;
// Get url from file.
$url = moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(), $file->get_filearea(),
$file->get_itemid(), $file->get_filepath(), $file->get_filename());
// Add this url to the body class loginbackgroundimage[n] as a background image.
$scss .= 'body.pagelayout-login.loginbackgroundimage'.$count.' {';
$scss .= 'background-image: url("'.$url.'");';
$scss .= '}';
}
return $scss;
}
/**
* Get the text that should be displayed for the randomly displayed background image on the login page.
*
* @return array (of two strings, holding the text and the text color)
* @throws coding_exception
* @throws dml_exception
*/
function theme_boost_union_get_loginbackgroundimage_text() {
// Get the random number.
$number = theme_boost_union_get_random_loginbackgroundimage_number();
// Only search for the text if there's a background image.
if ($number != null) {
// Get the files from the filearea loginbackgroundimage.
$files = theme_boost_union_get_loginbackgroundimage_files();
// Get the file for the selected random number.
$file = array_slice($files, ($number - 1), 1, false);
// Get the filename.
$filename = array_pop($file)->get_filename();
// Get the config for loginbackgroundimagetext and make an array out of the lines.
$lines = explode("\n", get_config('theme_boost_union', 'loginbackgroundimagetext'));
// Process the lines.
foreach ($lines as $line) {
$settings = explode("|", $line);
// If the line does not have three items, skip it.
if (count($settings) != 3) {
continue;
}
// Compare the filenames for a match.
if (strcmp($filename, trim($settings[0])) == 0) {
// Trim the second parameter as we need it more than once.
$settings[2] = trim($settings[2]);
// If the color value is not acceptable, replace it with dark.
if ($settings[2] != 'dark' && $settings[2] != 'light') {
$settings[2] = 'dark';
}
// Return the text + text color that belongs to the randomly selected image.
return [format_string(trim($settings[1])), $settings[2]];
}
}
}
return '';
}
/**
* Return the files from the additionalresources file area as templatecontext structure.
* It was designed to compose the files for the settings-additionalresources-filelist.mustache template.
* This function always loads the files from the filearea which is not really performant.
* Thus, you have to take care where and how often you use it (or add some caching).
*
* @return array|null
* @throws coding_exception
* @throws dml_exception
*/
function theme_boost_union_get_additionalresources_templatecontext() {
global $OUTPUT;
// Static variable to remember the files for subsequent calls of this function.
static $filesforcontext = null;
if ($filesforcontext == null) {
// Get the system context.
$systemcontext = \context_system::instance();
// Get filearea.
$fs = get_file_storage();
// Get all files from filearea.
$files = $fs->get_area_files($systemcontext->id, 'theme_boost_union', 'additionalresources', false, 'itemid', false);
// Iterate over the files and fill the templatecontext of the file list.
$filesforcontext = [];
foreach ($files as $af) {
$urlpersistent = new moodle_url('/pluginfile.php/1/theme_boost_union/additionalresources/0/'.$af->get_filename());
$urlrevisioned = new moodle_url('/pluginfile.php/1/theme_boost_union/additionalresources/'.theme_get_revision().
'/'.$af->get_filename());
$filesforcontext[] = ['filename' => $af->get_filename(),
'filetype' => $af->get_mimetype(),
'filesize' => display_size($af->get_filesize()),
'fileicon' => $OUTPUT->image_icon(file_file_icon($af), get_mimetype_description($af)),
'fileurlpersistent' => $urlpersistent->out(),
'fileurlrevisioned' => $urlrevisioned->out(), ];
}
}
return $filesforcontext;
}
/**
* Return the files from the customfonts file area as templatecontext structure.
* It was designed to compose the files for the settings-customfonts-filelist.mustache template.
* This function always loads the files from the filearea which is not really performant.
* Thus, you have to take care where and how often you use it (or add some caching).
*
* @return array|null
* @throws coding_exception
* @throws dml_exception
*/
function theme_boost_union_get_customfonts_templatecontext() {
global $OUTPUT;
// Static variable to remember the files for subsequent calls of this function.
static $filesforcontext = null;
if ($filesforcontext == null) {
// Get the system context.
$systemcontext = \context_system::instance();
// Get filearea.
$fs = get_file_storage();
// Get all files from filearea.
$files = $fs->get_area_files($systemcontext->id, 'theme_boost_union', 'customfonts', false, 'itemid', false);
// Get the webfonts extensions list.
$webfonts = theme_boost_union_get_webfonts_extensions();
// Iterate over the files.
$filesforcontext = [];
foreach ($files as $af) {
// Get the filename.
$filename = $af->get_filename();
// Check if the file is really a font file (as we can't really rely on the upload restriction in settings.php)
// according to its file suffix (as the filetype might not have a known mimetype).
// If it isn't a font file, skip it.
$filenamesuffix = pathinfo($filename, PATHINFO_EXTENSION);
if (!in_array('.'.$filenamesuffix, $webfonts)) {
continue;
}
// Otherwise, fill the templatecontext of the file list.
$urlpersistent = new moodle_url('/pluginfile.php/1/theme_boost_union/customfonts/0/'.$filename);
$filesforcontext[] = ['filename' => $filename,
'fileurlpersistent' => $urlpersistent->out(), ];
}
}
return $filesforcontext;
}
/**
* Helper function which returns an array of accepted webfonts extensions (including the dots).
*
* @return array
*/
function theme_boost_union_get_webfonts_extensions() {
return ['.eot', '.otf', '.svg', '.ttf', '.woff', '.woff2'];
}
/**
* Helper function which makes sure that all webfont file types are registered in the system.
* The webfont file types need to be registered in the system, otherwise the admin settings filepicker wouldn't allow restricting
* the uploadable file types to webfonts only.
*
* Please note: If custom filetypes are defined in config.php, registering additional filetypes is not possible
* due to a restriction in the set_custom_types() function in Moodle core. In this case, this function does not
* register anything and will return false.
*
* @return boolean true if the filetypes were registered, false if not.
* @throws coding_exception
*/
function theme_boost_union_register_webfonts_filetypes() {
global $CFG;
// If customfiletypes are set in config.php or PHP tests are running, we can't do anything.
if (array_key_exists('customfiletypes', $CFG->config_php_settings) || PHPUNIT_TEST) {
return false;
}
// Our array of webfont file types to register.
// As we want to keep things simple, we do not set a particular icon for these file types.
// Likewise, we do not set any type groups or use descriptions from the language pack.
$webfonts = [
'eot' => [
'extension' => 'eot',
'mimetype' => 'application/vnd.ms-fontobject',
'coreicon' => 'unknown',
],
'otf' => [
'extension' => 'otf',
'mimetype' => 'font/otf',
'coreicon' => 'unknown',
],
'svg' => [
'extension' => 'svg',
'mimetype' => 'image/svg+xml',
'coreicon' => 'unknown',
],
'ttf' => [
'extension' => 'ttf',
'mimetype' => 'font/ttf',
'coreicon' => 'unknown',
],
'woff' => [
'extension' => 'woff',
'mimetype' => 'font/woff',
'coreicon' => 'unknown',
],
'woff2' => [
'extension' => 'woff2',
'mimetype' => 'font/woff2',
'coreicon' => 'unknown',
],
];
// First, get the list of currently registered file types.
$currenttypes = core_filetypes::get_types();
// Iterate over the webfonts file types.
foreach ($webfonts as $f) {
// If the file type is already registered, skip it.
if (array_key_exists($f['extension'], $currenttypes)) {
continue;
}
// Otherwise, register the file type.
core_filetypes::add_type($f['extension'], $f['mimetype'], $f['coreicon']);
}
return true;
}
/**
* Helper function to render a preview of a HTML email to be shown on the theme settings page.
*
* If E-Mails have been branded, an E-Mail preview will be returned as string.
* Otherwise, null will be returned.
*
* @return string|null
*/
function theme_boost_union_get_emailbrandinghtmlpreview() {
global $OUTPUT;
// Get branding snippets.
$htmlprefix = get_string('templateemailhtmlprefix', 'theme_boost_union');
$htmlsuffix = get_string('templateemailhtmlsuffix', 'theme_boost_union');
// If no snippet was customized, return null.
if (trim($htmlprefix) == '' && trim($htmlsuffix) == '') {
return null;
}
// Otherwise, compose mail text.
$mailtemplatecontext = ['body' => get_string('emailbrandinghtmldemobody', 'theme_boost_union')];
$mail = $OUTPUT->render_from_template('core/email_html', $mailtemplatecontext);
// And compose mail preview.
$previewtemplatecontext = ['mail' => $mail, 'type' => 'html', 'monospace' => false];
$preview = $OUTPUT->render_from_template('theme_boost_union/emailpreview', $previewtemplatecontext);
return $preview;
}
/**
* Helper function to render a preview of a plaintext email to be shown on the theme settings page.
*
* If E-Mails have been branded, an E-Mail preview will be returned as string.
* Otherwise, null will be returned.
*
* @return string|null
*/
function theme_boost_union_get_emailbrandingtextpreview() {
global $OUTPUT;
// Get branding snippets.
$textprefix = get_string('templateemailtextprefix', 'theme_boost_union');
$textsuffix = get_string('templateemailtextsuffix', 'theme_boost_union');
// If no snippet was customized, return null.
if (trim($textprefix) == '' && trim($textsuffix) == '') {
return null;
}
// Otherwise, compose mail text.
$mailtemplatecontext = ['body' => get_string('emailbrandingtextdemobody', 'theme_boost_union')];
$mail = nl2br($OUTPUT->render_from_template('core/email_text', $mailtemplatecontext));
// And compose mail preview.
$previewtemplatecontext = ['mail' => $mail, 'type' => 'text', 'monospace' => true];
$preview = $OUTPUT->render_from_template('theme_boost_union/emailpreview', $previewtemplatecontext);
return $preview;
}
/**
* Helper function to compose the title of an external admin page.
* This is adopted from /admin/settings.php and done to make sure that the external admin pages look as similar as possible
* to the standard admin pages.
*
* @param string $pagename The page's name.
*
* @return string
*/
function theme_boost_union_get_externaladminpage_title($pagename) {
global $SITE;
$title = $SITE->shortname.': ';
$title .= get_string('administration', 'core').': ';
$title .= get_string('appearance', 'core').': ';
$title .= get_string('themes', 'core').': ';
$title .= get_string('pluginname', 'theme_boost_union').': ';
$title .= $pagename;
return $title;
}
/**
* Helper function to compose the heading of an external admin page.
* This is adopted from /admin/settings.php and done to make sure that the external admin pages look as similar as possible
* to the standard admin pages.
*
* @return string
*/
function theme_boost_union_get_externaladminpage_heading() {
global $SITE;
return $SITE->fullname;
}
/**
* Helper function which adds the CSS file from the flavour to the Moodle page.
* It's meant to be called by theme_boost_union_before_standard_html_head() only.
* *
* @throws coding_exception
* @throws dml_exception
* @throws moodle_exception
*/
function theme_boost_union_add_flavourcss_to_page() {
global $CFG, $PAGE;
// Require flavours library.
require_once($CFG->dirroot . '/theme/boost_union/flavours/flavourslib.php');
// If any flavour applies to this page.
$flavour = theme_boost_union_get_flavour_which_applies();
if ($flavour != null) {
// Build the flavour CSS file URL.
$flavourcssurl = new moodle_url('/theme/boost_union/flavours/styles.php',
['id' => $flavour->id, 'rev' => theme_get_revision()]);
// Add the CSS file to the page.
$PAGE->requires->css($flavourcssurl);
}
}
/**
* Helper function which returns the course header image url, picking the current course from the course settings
* or the fallback image from the theme.
* If no course header image can should be shown for the current course, the function returns null.
*
* @return null | string
*/
function theme_boost_union_get_course_header_image_url() {
global $PAGE;
// If the current course is the frontpage course (which means that we are not within any real course),
// directly return null.
if (isset($PAGE->course->id) && $PAGE->course->id == SITEID) {
return null;
}
// Get the course image.
$courseimage = \core_course\external\course_summary_exporter::get_course_image($PAGE->course);
// If the course has a course image.
if ($courseimage) {
// Then return it directly.
return $courseimage;
// Otherwise, if a fallback image is configured.
} else if (get_config('theme_boost_union', 'courseheaderimagefallback')) {
// Get the system context.
$systemcontext = \context_system::instance();
// Get filearea.
$fs = get_file_storage();