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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/>.
/**
* Library of useful functions
*
* @copyright 1999 Martin Dougiamas http://dougiamas.com
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package core_course
*/
defined('MOODLE_INTERNAL') || die;
require_once($CFG->libdir.'/completionlib.php');
require_once($CFG->libdir.'/filelib.php');
require_once($CFG->libdir.'/datalib.php');
require_once($CFG->dirroot.'/course/format/lib.php');
define('COURSE_MAX_LOGS_PER_PAGE', 1000); // Records.
define('COURSE_MAX_RECENT_PERIOD', 172800); // Two days, in seconds.
/**
* Number of courses to display when summaries are included.
* @var int
* @deprecated since 2.4, use $CFG->courseswithsummarieslimit instead.
*/
define('COURSE_MAX_SUMMARIES_PER_PAGE', 10);
// Max courses in log dropdown before switching to optional.
define('COURSE_MAX_COURSES_PER_DROPDOWN', 1000);
// Max users in log dropdown before switching to optional.
define('COURSE_MAX_USERS_PER_DROPDOWN', 1000);
define('FRONTPAGENEWS', '0');
define('FRONTPAGECATEGORYNAMES', '2');
define('FRONTPAGECATEGORYCOMBO', '4');
define('FRONTPAGEENROLLEDCOURSELIST', '5');
define('FRONTPAGEALLCOURSELIST', '6');
define('FRONTPAGECOURSESEARCH', '7');
// Important! Replaced with $CFG->frontpagecourselimit - maximum number of courses displayed on the frontpage.
define('EXCELROWS', 65535);
define('FIRSTUSEDEXCELROW', 3);
define('MOD_CLASS_ACTIVITY', 0);
define('MOD_CLASS_RESOURCE', 1);
define('COURSE_TIMELINE_ALLINCLUDINGHIDDEN', 'allincludinghidden');
define('COURSE_TIMELINE_ALL', 'all');
define('COURSE_TIMELINE_PAST', 'past');
define('COURSE_TIMELINE_INPROGRESS', 'inprogress');
define('COURSE_TIMELINE_FUTURE', 'future');
define('COURSE_FAVOURITES', 'favourites');
define('COURSE_TIMELINE_HIDDEN', 'hidden');
define('COURSE_CUSTOMFIELD', 'customfield');
define('COURSE_DB_QUERY_LIMIT', 1000);
/** Searching for all courses that have no value for the specified custom field. */
define('COURSE_CUSTOMFIELD_EMPTY', -1);
function make_log_url($module, $url) {
switch ($module) {
case 'course':
if (strpos($url, 'report/') === 0) {
// there is only one report type, course reports are deprecated
$url = "/$url";
break;
}
case 'file':
case 'login':
case 'lib':
case 'admin':
case 'category':
case 'mnet course':
if (strpos($url, '../') === 0) {
$url = ltrim($url, '.');
} else {
$url = "/course/$url";
}
break;
case 'calendar':
$url = "/calendar/$url";
break;
case 'user':
case 'blog':
$url = "/$module/$url";
break;
case 'upload':
$url = $url;
break;
case 'coursetags':
$url = '/'.$url;
break;
case 'library':
case '':
$url = '/';
break;
case 'message':
$url = "/message/$url";
break;
case 'notes':
$url = "/notes/$url";
break;
case 'tag':
$url = "/tag/$url";
break;
case 'role':
$url = '/'.$url;
break;
case 'grade':
$url = "/grade/$url";
break;
default:
$url = "/mod/$module/$url";
break;
}
//now let's sanitise urls - there might be some ugly nasties:-(
$parts = explode('?', $url);
$script = array_shift($parts);
if (strpos($script, 'http') === 0) {
$script = clean_param($script, PARAM_URL);
} else {
$script = clean_param($script, PARAM_PATH);
}
$query = '';
if ($parts) {
$query = implode('', $parts);
$query = str_replace('&', '&', $query); // both & and & are stored in db :-|
$parts = explode('&', $query);
$eq = urlencode('=');
foreach ($parts as $key=>$part) {
$part = urlencode(urldecode($part));
$part = str_replace($eq, '=', $part);
$parts[$key] = $part;
}
$query = '?'.implode('&', $parts);
}
return $script.$query;
}
function build_mnet_logs_array($hostid, $course, $user=0, $date=0, $order="l.time ASC", $limitfrom='', $limitnum='',
$modname="", $modid=0, $modaction="", $groupid=0) {
global $CFG, $DB;
// It is assumed that $date is the GMT time of midnight for that day,
// and so the next 86400 seconds worth of logs are printed.
/// Setup for group handling.
// TODO: I don't understand group/context/etc. enough to be able to do
// something interesting with it here
// What is the context of a remote course?
/// If the group mode is separate, and this user does not have editing privileges,
/// then only the user's group can be viewed.
//if ($course->groupmode == SEPARATEGROUPS and !has_capability('moodle/course:managegroups', context_course::instance($course->id))) {
// $groupid = get_current_group($course->id);
//}
/// If this course doesn't have groups, no groupid can be specified.
//else if (!$course->groupmode) {
// $groupid = 0;
//}
$groupid = 0;
$joins = array();
$where = '';
$qry = "SELECT l.*, u.firstname, u.lastname, u.picture
FROM {mnet_log} l
LEFT JOIN {user} u ON l.userid = u.id
WHERE ";
$params = array();
$where .= "l.hostid = :hostid";
$params['hostid'] = $hostid;
// TODO: Is 1 really a magic number referring to the sitename?
if ($course != SITEID || $modid != 0) {
$where .= " AND l.course=:courseid";
$params['courseid'] = $course;
}
if ($modname) {
$where .= " AND l.module = :modname";
$params['modname'] = $modname;
}
if ('site_errors' === $modid) {
$where .= " AND ( l.action='error' OR l.action='infected' )";
} else if ($modid) {
//TODO: This assumes that modids are the same across sites... probably
//not true
$where .= " AND l.cmid = :modid";
$params['modid'] = $modid;
}
if ($modaction) {
$firstletter = substr($modaction, 0, 1);
if ($firstletter == '-') {
$where .= " AND ".$DB->sql_like('l.action', ':modaction', false, true, true);
$params['modaction'] = '%'.substr($modaction, 1).'%';
} else {
$where .= " AND ".$DB->sql_like('l.action', ':modaction', false);
$params['modaction'] = '%'.$modaction.'%';
}
}
if ($user) {
$where .= " AND l.userid = :user";
$params['user'] = $user;
}
if ($date) {
$enddate = $date + 86400;
$where .= " AND l.time > :date AND l.time < :enddate";
$params['date'] = $date;
$params['enddate'] = $enddate;
}
$result = array();
$result['totalcount'] = $DB->count_records_sql("SELECT COUNT('x') FROM {mnet_log} l WHERE $where", $params);
if(!empty($result['totalcount'])) {
$where .= " ORDER BY $order";
$result['logs'] = $DB->get_records_sql("$qry $where", $params, $limitfrom, $limitnum);
} else {
$result['logs'] = array();
}
return $result;
}
/**
* Checks the integrity of the course data.
*
* In summary - compares course_sections.sequence and course_modules.section.
*
* More detailed, checks that:
* - course_sections.sequence contains each module id not more than once in the course
* - for each moduleid from course_sections.sequence the field course_modules.section
* refers to the same section id (this means course_sections.sequence is more
* important if they are different)
* - ($fullcheck only) each module in the course is present in one of
* course_sections.sequence
* - ($fullcheck only) removes non-existing course modules from section sequences
*
* If there are any mismatches, the changes are made and records are updated in DB.
*
* Course cache is NOT rebuilt if there are any errors!
*
* This function is used each time when course cache is being rebuilt with $fullcheck = false
* and in CLI script admin/cli/fix_course_sequence.php with $fullcheck = true
*
* @param int $courseid id of the course
* @param array $rawmods result of funciton {@link get_course_mods()} - containst
* the list of enabled course modules in the course. Retrieved from DB if not specified.
* Argument ignored in cashe of $fullcheck, the list is retrieved form DB anyway.
* @param array $sections records from course_sections table for this course.
* Retrieved from DB if not specified
* @param bool $fullcheck Will add orphaned modules to their sections and remove non-existing
* course modules from sequences. Only to be used in site maintenance mode when we are
* sure that another user is not in the middle of the process of moving/removing a module.
* @param bool $checkonly Only performs the check without updating DB, outputs all errors as debug messages.
* @return array array of messages with found problems. Empty output means everything is ok
*/
function course_integrity_check($courseid, $rawmods = null, $sections = null, $fullcheck = false, $checkonly = false) {
global $DB;
$messages = array();
if ($sections === null) {
$sections = $DB->get_records('course_sections', array('course' => $courseid), 'section', 'id,section,sequence');
}
if ($fullcheck) {
// Retrieve all records from course_modules regardless of module type visibility.
$rawmods = $DB->get_records('course_modules', array('course' => $courseid), 'id', 'id,section');
}
if ($rawmods === null) {
$rawmods = get_course_mods($courseid);
}
if (!$fullcheck && (empty($sections) || empty($rawmods))) {
// If either of the arrays is empty, no modules are displayed anyway.
return true;
}
$debuggingprefix = 'Failed integrity check for course ['.$courseid.']. ';
// First make sure that each module id appears in section sequences only once.
// If it appears in several section sequences the last section wins.
// If it appears twice in one section sequence, the first occurence wins.
$modsection = array();
foreach ($sections as $sectionid => $section) {
$sections[$sectionid]->newsequence = $section->sequence;
if (!empty($section->sequence)) {
$sequence = explode(",", $section->sequence);
$sequenceunique = array_unique($sequence);
if (count($sequenceunique) != count($sequence)) {
// Some course module id appears in this section sequence more than once.
ksort($sequenceunique); // Preserve initial order of modules.
$sequence = array_values($sequenceunique);
$sections[$sectionid]->newsequence = join(',', $sequence);
$messages[] = $debuggingprefix.'Sequence for course section ['.
$sectionid.'] is "'.$sections[$sectionid]->sequence.'", must be "'.$sections[$sectionid]->newsequence.'"';
}
foreach ($sequence as $cmid) {
if (array_key_exists($cmid, $modsection) && isset($rawmods[$cmid])) {
// Some course module id appears to be in more than one section's sequences.
$wrongsectionid = $modsection[$cmid];
$sections[$wrongsectionid]->newsequence = trim(preg_replace("/,$cmid,/", ',', ','.$sections[$wrongsectionid]->newsequence. ','), ',');
$messages[] = $debuggingprefix.'Course module ['.$cmid.'] must be removed from sequence of section ['.
$wrongsectionid.'] because it is also present in sequence of section ['.$sectionid.']';
}
$modsection[$cmid] = $sectionid;
}
}
}
// Add orphaned modules to their sections if they exist or to section 0 otherwise.
if ($fullcheck) {
foreach ($rawmods as $cmid => $mod) {
if (!isset($modsection[$cmid])) {
// This is a module that is not mentioned in course_section.sequence at all.
// Add it to the section $mod->section or to the last available section.
if ($mod->section && isset($sections[$mod->section])) {
$modsection[$cmid] = $mod->section;
} else {
$firstsection = reset($sections);
$modsection[$cmid] = $firstsection->id;
}
$sections[$modsection[$cmid]]->newsequence = trim($sections[$modsection[$cmid]]->newsequence.','.$cmid, ',');
$messages[] = $debuggingprefix.'Course module ['.$cmid.'] is missing from sequence of section ['.
$modsection[$cmid].']';
}
}
foreach ($modsection as $cmid => $sectionid) {
if (!isset($rawmods[$cmid])) {
// Section $sectionid refers to module id that does not exist.
$sections[$sectionid]->newsequence = trim(preg_replace("/,$cmid,/", ',', ','.$sections[$sectionid]->newsequence.','), ',');
$messages[] = $debuggingprefix.'Course module ['.$cmid.
'] does not exist but is present in the sequence of section ['.$sectionid.']';
}
}
}
// Update changed sections.
if (!$checkonly && !empty($messages)) {
foreach ($sections as $sectionid => $section) {
if ($section->newsequence !== $section->sequence) {
$DB->update_record('course_sections', array('id' => $sectionid, 'sequence' => $section->newsequence));
}
}
}
// Now make sure that all modules point to the correct sections.
foreach ($rawmods as $cmid => $mod) {
if (isset($modsection[$cmid]) && $modsection[$cmid] != $mod->section) {
if (!$checkonly) {
$DB->update_record('course_modules', array('id' => $cmid, 'section' => $modsection[$cmid]));
}
$messages[] = $debuggingprefix.'Course module ['.$cmid.
'] points to section ['.$mod->section.'] instead of ['.$modsection[$cmid].']';
}
}
return $messages;
}
/**
* For a given course, returns an array of course activity objects
* Each item in the array contains he following properties:
*/
function get_array_of_activities($courseid) {
// cm - course module id
// mod - name of the module (eg forum)
// section - the number of the section (eg week or topic)
// name - the name of the instance
// visible - is the instance visible or not
// groupingid - grouping id
// extra - contains extra string to include in any link
global $CFG, $DB;
$course = $DB->get_record('course', array('id'=>$courseid));
if (empty($course)) {
throw new moodle_exception('courseidnotfound');
}
$mod = array();
$rawmods = get_course_mods($courseid);
if (empty($rawmods)) {
return $mod; // always return array
}
$courseformat = course_get_format($course);
if ($sections = $DB->get_records('course_sections', array('course' => $courseid),
'section ASC', 'id,section,sequence,visible')) {
// First check and correct obvious mismatches between course_sections.sequence and course_modules.section.
if ($errormessages = course_integrity_check($courseid, $rawmods, $sections)) {
debugging(join('<br>', $errormessages));
$rawmods = get_course_mods($courseid);
$sections = $DB->get_records('course_sections', array('course' => $courseid),
'section ASC', 'id,section,sequence,visible');
}
// Build array of activities.
foreach ($sections as $section) {
if (!empty($section->sequence)) {
$sequence = explode(",", $section->sequence);
foreach ($sequence as $seq) {
if (empty($rawmods[$seq])) {
continue;
}
// Adjust visibleoncoursepage, value in DB may not respect format availability.
$rawmods[$seq]->visibleoncoursepage = (!$rawmods[$seq]->visible
|| $rawmods[$seq]->visibleoncoursepage
|| empty($CFG->allowstealth)
|| !$courseformat->allow_stealth_module_visibility($rawmods[$seq], $section)) ? 1 : 0;
// Create an object that will be cached.
$mod[$seq] = new stdClass();
$mod[$seq]->id = $rawmods[$seq]->instance;
$mod[$seq]->cm = $rawmods[$seq]->id;
$mod[$seq]->mod = $rawmods[$seq]->modname;
// Oh dear. Inconsistent names left here for backward compatibility.
$mod[$seq]->section = $section->section;
$mod[$seq]->sectionid = $rawmods[$seq]->section;
$mod[$seq]->module = $rawmods[$seq]->module;
$mod[$seq]->added = $rawmods[$seq]->added;
$mod[$seq]->score = $rawmods[$seq]->score;
$mod[$seq]->idnumber = $rawmods[$seq]->idnumber;
$mod[$seq]->visible = $rawmods[$seq]->visible;
$mod[$seq]->visibleoncoursepage = $rawmods[$seq]->visibleoncoursepage;
$mod[$seq]->visibleold = $rawmods[$seq]->visibleold;
$mod[$seq]->groupmode = $rawmods[$seq]->groupmode;
$mod[$seq]->groupingid = $rawmods[$seq]->groupingid;
$mod[$seq]->indent = $rawmods[$seq]->indent;
$mod[$seq]->completion = $rawmods[$seq]->completion;
$mod[$seq]->extra = "";
$mod[$seq]->completiongradeitemnumber =
$rawmods[$seq]->completiongradeitemnumber;
$mod[$seq]->completionview = $rawmods[$seq]->completionview;
$mod[$seq]->completionexpected = $rawmods[$seq]->completionexpected;
$mod[$seq]->showdescription = $rawmods[$seq]->showdescription;
$mod[$seq]->availability = $rawmods[$seq]->availability;
$mod[$seq]->deletioninprogress = $rawmods[$seq]->deletioninprogress;
$modname = $mod[$seq]->mod;
$functionname = $modname."_get_coursemodule_info";
if (!file_exists("$CFG->dirroot/mod/$modname/lib.php")) {
continue;
}
include_once("$CFG->dirroot/mod/$modname/lib.php");
if ($hasfunction = function_exists($functionname)) {
if ($info = $functionname($rawmods[$seq])) {
if (!empty($info->icon)) {
$mod[$seq]->icon = $info->icon;
}
if (!empty($info->iconcomponent)) {
$mod[$seq]->iconcomponent = $info->iconcomponent;
}
if (!empty($info->name)) {
$mod[$seq]->name = $info->name;
}
if ($info instanceof cached_cm_info) {
// When using cached_cm_info you can include three new fields
// that aren't available for legacy code
if (!empty($info->content)) {
$mod[$seq]->content = $info->content;
}
if (!empty($info->extraclasses)) {
$mod[$seq]->extraclasses = $info->extraclasses;
}
if (!empty($info->iconurl)) {
// Convert URL to string as it's easier to store. Also serialized object contains \0 byte and can not be written to Postgres DB.
$url = new moodle_url($info->iconurl);
$mod[$seq]->iconurl = $url->out(false);
}
if (!empty($info->onclick)) {
$mod[$seq]->onclick = $info->onclick;
}
if (!empty($info->customdata)) {
$mod[$seq]->customdata = $info->customdata;
}
} else {
// When using a stdclass, the (horrible) deprecated ->extra field
// is available for BC
if (!empty($info->extra)) {
$mod[$seq]->extra = $info->extra;
}
}
}
}
// When there is no modname_get_coursemodule_info function,
// but showdescriptions is enabled, then we use the 'intro'
// and 'introformat' fields in the module table
if (!$hasfunction && $rawmods[$seq]->showdescription) {
if ($modvalues = $DB->get_record($rawmods[$seq]->modname,
array('id' => $rawmods[$seq]->instance), 'name, intro, introformat')) {
// Set content from intro and introformat. Filters are disabled
// because we filter it with format_text at display time
$mod[$seq]->content = format_module_intro($rawmods[$seq]->modname,
$modvalues, $rawmods[$seq]->id, false);
// To save making another query just below, put name in here
$mod[$seq]->name = $modvalues->name;
}
}
if (!isset($mod[$seq]->name)) {
$mod[$seq]->name = $DB->get_field($rawmods[$seq]->modname, "name", array("id"=>$rawmods[$seq]->instance));
}
// Minimise the database size by unsetting default options when they are
// 'empty'. This list corresponds to code in the cm_info constructor.
foreach (array('idnumber', 'groupmode', 'groupingid',
'indent', 'completion', 'extra', 'extraclasses', 'iconurl', 'onclick', 'content',
'icon', 'iconcomponent', 'customdata', 'availability', 'completionview',
'completionexpected', 'score', 'showdescription', 'deletioninprogress') as $property) {
if (property_exists($mod[$seq], $property) &&
empty($mod[$seq]->{$property})) {
unset($mod[$seq]->{$property});
}
}
// Special case: this value is usually set to null, but may be 0
if (property_exists($mod[$seq], 'completiongradeitemnumber') &&
is_null($mod[$seq]->completiongradeitemnumber)) {
unset($mod[$seq]->completiongradeitemnumber);
}
}
}
}
}
return $mod;
}
/**
* Returns the localised human-readable names of all used modules
*
* @param bool $plural if true returns the plural forms of the names
* @return array where key is the module name (component name without 'mod_') and
* the value is the human-readable string. Array sorted alphabetically by value
*/
function get_module_types_names($plural = false) {
static $modnames = null;
global $DB, $CFG;
if ($modnames === null) {
$modnames = array(0 => array(), 1 => array());
if ($allmods = $DB->get_records("modules")) {
foreach ($allmods as $mod) {
if (file_exists("$CFG->dirroot/mod/$mod->name/lib.php") && $mod->visible) {
$modnames[0][$mod->name] = get_string("modulename", "$mod->name", null, true);
$modnames[1][$mod->name] = get_string("modulenameplural", "$mod->name", null, true);
}
}
}
}
return $modnames[(int)$plural];
}
/**
* Set highlighted section. Only one section can be highlighted at the time.
*
* @param int $courseid course id
* @param int $marker highlight section with this number, 0 means remove higlightin
* @return void
*/
function course_set_marker($courseid, $marker) {
global $DB, $COURSE;
$DB->set_field("course", "marker", $marker, array('id' => $courseid));
if ($COURSE && $COURSE->id == $courseid) {
$COURSE->marker = $marker;
}
if (class_exists('format_base')) {
format_base::reset_course_cache($courseid);
}
course_modinfo::clear_instance_cache($courseid);
}
/**
* For a given course section, marks it visible or hidden,
* and does the same for every activity in that section
*
* @param int $courseid course id
* @param int $sectionnumber The section number to adjust
* @param int $visibility The new visibility
* @return array A list of resources which were hidden in the section
*/
function set_section_visible($courseid, $sectionnumber, $visibility) {
global $DB;
$resourcestotoggle = array();
if ($section = $DB->get_record("course_sections", array("course"=>$courseid, "section"=>$sectionnumber))) {
course_update_section($courseid, $section, array('visible' => $visibility));
// Determine which modules are visible for AJAX update
$modules = !empty($section->sequence) ? explode(',', $section->sequence) : array();
if (!empty($modules)) {
list($insql, $params) = $DB->get_in_or_equal($modules);
$select = 'id ' . $insql . ' AND visible = ?';
array_push($params, $visibility);
if (!$visibility) {
$select .= ' AND visibleold = 1';
}
$resourcestotoggle = $DB->get_fieldset_select('course_modules', 'id', $select, $params);
}
}
return $resourcestotoggle;
}
/**
* Retrieve all metadata for the requested modules
*
* @param object $course The Course
* @param array $modnames An array containing the list of modules and their
* names
* @param int $sectionreturn The section to return to
* @return array A list of stdClass objects containing metadata about each
* module
*/
function get_module_metadata($course, $modnames, $sectionreturn = null) {
global $OUTPUT;
// get_module_metadata will be called once per section on the page and courses may show
// different modules to one another
static $modlist = array();
if (!isset($modlist[$course->id])) {
$modlist[$course->id] = array();
}
$return = array();
$urlbase = new moodle_url('/course/mod.php', array('id' => $course->id, 'sesskey' => sesskey()));
if ($sectionreturn !== null) {
$urlbase->param('sr', $sectionreturn);
}
foreach($modnames as $modname => $modnamestr) {
if (!course_allowed_module($course, $modname)) {
continue;
}
if (isset($modlist[$course->id][$modname])) {
// This module is already cached
$return += $modlist[$course->id][$modname];
continue;
}
$modlist[$course->id][$modname] = array();
// Create an object for a default representation of this module type in the activity chooser. It will be used
// if module does not implement callback get_shortcuts() and it will also be passed to the callback if it exists.
$defaultmodule = new stdClass();
$defaultmodule->title = $modnamestr;
$defaultmodule->name = $modname;
$defaultmodule->link = new moodle_url($urlbase, array('add' => $modname));
$defaultmodule->icon = $OUTPUT->pix_icon('icon', '', $defaultmodule->name, array('class' => 'icon'));
$sm = get_string_manager();
if ($sm->string_exists('modulename_help', $modname)) {
$defaultmodule->help = get_string('modulename_help', $modname);
if ($sm->string_exists('modulename_link', $modname)) { // Link to further info in Moodle docs.
$link = get_string('modulename_link', $modname);
$linktext = get_string('morehelp');
$defaultmodule->help .= html_writer::tag('div',
$OUTPUT->doc_link($link, $linktext, true), array('class' => 'helpdoclink'));
}
}
$defaultmodule->archetype = plugin_supports('mod', $modname, FEATURE_MOD_ARCHETYPE, MOD_ARCHETYPE_OTHER);
// Each module can implement callback modulename_get_shortcuts() in its lib.php and return the list
// of elements to be added to activity chooser.
$items = component_callback($modname, 'get_shortcuts', array($defaultmodule), null);
if ($items !== null) {
foreach ($items as $item) {
// Add all items to the return array. All items must have different links, use them as a key in the return array.
if (!isset($item->archetype)) {
$item->archetype = $defaultmodule->archetype;
}
if (!isset($item->icon)) {
$item->icon = $defaultmodule->icon;
}
// If plugin returned the only one item with the same link as default item - cache it as $modname,
// otherwise append the link url to the module name.
$item->name = (count($items) == 1 &&
$item->link->out() === $defaultmodule->link->out()) ? $modname : $modname . ':' . $item->link;
// If the module provides the helptext property, append it to the help text to match the look and feel
// of the default course modules.
if (isset($item->help) && isset($item->helplink)) {
$linktext = get_string('morehelp');
$item->help .= html_writer::tag('div',
$OUTPUT->doc_link($item->helplink, $linktext, true), array('class' => 'helpdoclink'));
}
$modlist[$course->id][$modname][$item->name] = $item;
}
$return += $modlist[$course->id][$modname];
// If get_shortcuts() callback is defined, the default module action is not added.
// It is a responsibility of the callback to add it to the return value unless it is not needed.
continue;
}
// The callback get_shortcuts() was not found, use the default item for the activity chooser.
$modlist[$course->id][$modname][$modname] = $defaultmodule;
$return[$modname] = $defaultmodule;
}
core_collator::asort_objects_by_property($return, 'title');
return $return;
}
/**
* Return the course category context for the category with id $categoryid, except
* that if $categoryid is 0, return the system context.
*
* @param integer $categoryid a category id or 0.
* @return context the corresponding context
*/
function get_category_or_system_context($categoryid) {
if ($categoryid) {
return context_coursecat::instance($categoryid, IGNORE_MISSING);
} else {
return context_system::instance();
}
}
/**
* Returns full course categories trees to be used in html_writer::select()
*
* Calls {@link core_course_category::make_categories_list()} to build the tree and
* adds whitespace to denote nesting
*
* @return array array mapping course category id to the display name
*/
function make_categories_options() {
$cats = core_course_category::make_categories_list('', 0, ' / ');
foreach ($cats as $key => $value) {
// Prefix the value with the number of spaces equal to category depth (number of separators in the value).
$cats[$key] = str_repeat(' ', substr_count($value, ' / ')). $value;
}
return $cats;
}
/**
* Print the buttons relating to course requests.
*
* @param context $context current page context.
*/
function print_course_request_buttons($context) {
global $CFG, $DB, $OUTPUT;
if (empty($CFG->enablecourserequests)) {
return;
}
if (course_request::can_request($context)) {
// Print a button to request a new course.
$params = [];
if ($context instanceof context_coursecat) {
$params['category'] = $context->instanceid;
}
echo $OUTPUT->single_button(new moodle_url('/course/request.php', $params),
get_string('requestcourse'), 'get');
}
/// Print a button to manage pending requests
if (has_capability('moodle/site:approvecourse', $context)) {
$disabled = !$DB->record_exists('course_request', array());
echo $OUTPUT->single_button(new moodle_url('/course/pending.php'), get_string('coursespending'), 'get', array('disabled' => $disabled));
}
}
/**
* Does the user have permission to edit things in this category?
*
* @param integer $categoryid The id of the category we are showing, or 0 for system context.
* @return boolean has_any_capability(array(...), ...); in the appropriate context.
*/
function can_edit_in_category($categoryid = 0) {
$context = get_category_or_system_context($categoryid);
return has_any_capability(array('moodle/category:manage', 'moodle/course:create'), $context);
}
/// MODULE FUNCTIONS /////////////////////////////////////////////////////////////////
function add_course_module($mod) {
global $DB;
$mod->added = time();
unset($mod->id);
$cmid = $DB->insert_record("course_modules", $mod);
rebuild_course_cache($mod->course, true);
return $cmid;
}
/**
* Creates a course section and adds it to the specified position
*
* @param int|stdClass $courseorid course id or course object
* @param int $position position to add to, 0 means to the end. If position is greater than
* number of existing secitons, the section is added to the end. This will become sectionnum of the
* new section. All existing sections at this or bigger position will be shifted down.
* @param bool $skipcheck the check has already been made and we know that the section with this position does not exist
* @return stdClass created section object
*/
function course_create_section($courseorid, $position = 0, $skipcheck = false) {
global $DB;
$courseid = is_object($courseorid) ? $courseorid->id : $courseorid;
// Find the last sectionnum among existing sections.
if ($skipcheck) {
$lastsection = $position - 1;
} else {
$lastsection = (int)$DB->get_field_sql('SELECT max(section) from {course_sections} WHERE course = ?', [$courseid]);
}
// First add section to the end.
$cw = new stdClass();
$cw->course = $courseid;
$cw->section = $lastsection + 1;
$cw->summary = '';
$cw->summaryformat = FORMAT_HTML;
$cw->sequence = '';
$cw->name = null;
$cw->visible = 1;
$cw->availability = null;
$cw->timemodified = time();
$cw->id = $DB->insert_record("course_sections", $cw);
// Now move it to the specified position.
if ($position > 0 && $position <= $lastsection) {
$course = is_object($courseorid) ? $courseorid : get_course($courseorid);
move_section_to($course, $cw->section, $position, true);
$cw->section = $position;
}
core\event\course_section_created::create_from_section($cw)->trigger();
rebuild_course_cache($courseid, true);
return $cw;
}
/**
* Creates missing course section(s) and rebuilds course cache
*
* @param int|stdClass $courseorid course id or course object
* @param int|array $sections list of relative section numbers to create
* @return bool if there were any sections created
*/
function course_create_sections_if_missing($courseorid, $sections) {
if (!is_array($sections)) {
$sections = array($sections);
}
$existing = array_keys(get_fast_modinfo($courseorid)->get_section_info_all());
if ($newsections = array_diff($sections, $existing)) {
foreach ($newsections as $sectionnum) {
course_create_section($courseorid, $sectionnum, true);
}
return true;
}
return false;
}
/**
* Adds an existing module to the section
*
* Updates both tables {course_sections} and {course_modules}
*
* Note: This function does not use modinfo PROVIDED that the section you are
* adding the module to already exists. If the section does not exist, it will
* build modinfo if necessary and create the section.
*
* @param int|stdClass $courseorid course id or course object
* @param int $cmid id of the module already existing in course_modules table
* @param int $sectionnum relative number of the section (field course_sections.section)
* If section does not exist it will be created
* @param int|stdClass $beforemod id or object with field id corresponding to the module
* before which the module needs to be included. Null for inserting in the
* end of the section
* @return int The course_sections ID where the module is inserted
*/
function course_add_cm_to_section($courseorid, $cmid, $sectionnum, $beforemod = null) {
global $DB, $COURSE;
if (is_object($beforemod)) {
$beforemod = $beforemod->id;
}
if (is_object($courseorid)) {
$courseid = $courseorid->id;
} else {
$courseid = $courseorid;
}
// Do not try to use modinfo here, there is no guarantee it is valid!
$section = $DB->get_record('course_sections',
array('course' => $courseid, 'section' => $sectionnum), '*', IGNORE_MISSING);
if (!$section) {
// This function call requires modinfo.
course_create_sections_if_missing($courseorid, $sectionnum);
$section = $DB->get_record('course_sections',
array('course' => $courseid, 'section' => $sectionnum), '*', MUST_EXIST);
}
$modarray = explode(",", trim($section->sequence));
if (empty($section->sequence)) {
$newsequence = "$cmid";
} else if ($beforemod && ($key = array_keys($modarray, $beforemod))) {
$insertarray = array($cmid, $beforemod);
array_splice($modarray, $key[0], 1, $insertarray);
$newsequence = implode(",", $modarray);
} else {
$newsequence = "$section->sequence,$cmid";
}
$DB->set_field("course_sections", "sequence", $newsequence, array("id" => $section->id));
$DB->set_field('course_modules', 'section', $section->id, array('id' => $cmid));
if (is_object($courseorid)) {
rebuild_course_cache($courseorid->id, true);
} else {
rebuild_course_cache($courseorid, true);
}
return $section->id; // Return course_sections ID that was used.
}
/**
* Change the group mode of a course module.
*
* Note: Do not forget to trigger the event \core\event\course_module_updated as it needs
* to be triggered manually, refer to {@link \core\event\course_module_updated::create_from_cm()}.
*
* @param int $id course module ID.
* @param int $groupmode the new groupmode value.
* @return bool True if the $groupmode was updated.
*/
function set_coursemodule_groupmode($id, $groupmode) {
global $DB;
$cm = $DB->get_record('course_modules', array('id' => $id), 'id,course,groupmode', MUST_EXIST);
if ($cm->groupmode != $groupmode) {
$DB->set_field('course_modules', 'groupmode', $groupmode, array('id' => $cm->id));
rebuild_course_cache($cm->course, true);
}
return ($cm->groupmode != $groupmode);
}
function set_coursemodule_idnumber($id, $idnumber) {
global $DB;
$cm = $DB->get_record('course_modules', array('id' => $id), 'id,course,idnumber', MUST_EXIST);
if ($cm->idnumber != $idnumber) {
$DB->set_field('course_modules', 'idnumber', $idnumber, array('id' => $cm->id));
rebuild_course_cache($cm->course, true);
}
return ($cm->idnumber != $idnumber);
}
/**
* Set the visibility of a module and inherent properties.
*
* Note: Do not forget to trigger the event \core\event\course_module_updated as it needs
* to be triggered manually, refer to {@link \core\event\course_module_updated::create_from_cm()}.
*
* From 2.4 the parameter $prevstateoverrides has been removed, the logic it triggered
* has been moved to {@link set_section_visible()} which was the only place from which
* the parameter was used.
*
* @param int $id of the module
* @param int $visible state of the module
* @param int $visibleoncoursepage state of the module on the course page
* @return bool false when the module was not found, true otherwise
*/
function set_coursemodule_visible($id, $visible, $visibleoncoursepage = 1) {
global $DB, $CFG;
require_once($CFG->libdir.'/gradelib.php');
require_once($CFG->dirroot.'/calendar/lib.php');
if (!$cm = $DB->get_record('course_modules', array('id'=>$id))) {
return false;
}
// Create events and propagate visibility to associated grade items if the value has changed.
// Only do this if it's changed to avoid accidently overwriting manual showing/hiding of student grades.
if ($cm->visible == $visible && $cm->visibleoncoursepage == $visibleoncoursepage) {
return true;
}
if (!$modulename = $DB->get_field('modules', 'name', array('id'=>$cm->module))) {
return false;
}
if (($cm->visible != $visible) &&
($events = $DB->get_records('event', array('instance' => $cm->instance, 'modulename' => $modulename)))) {
foreach($events as $event) {
if ($visible) {
$event = new calendar_event($event);
$event->toggle_visibility(true);
} else {
$event = new calendar_event($event);
$event->toggle_visibility(false);
}
}
}
// Updating visible and visibleold to keep them in sync. Only changing a section visibility will
// affect visibleold to allow for an original visibility restore. See set_section_visible().
$cminfo = new stdClass();
$cminfo->id = $id;
$cminfo->visible = $visible;
$cminfo->visibleoncoursepage = $visibleoncoursepage;
$cminfo->visibleold = $visible;
$DB->update_record('course_modules', $cminfo);
// Hide the associated grade items so the teacher doesn't also have to go to the gradebook and hide them there.
// Note that this must be done after updating the row in course_modules, in case
// the modules grade_item_update function needs to access $cm->visible.
if ($cm->visible != $visible &&
plugin_supports('mod', $modulename, FEATURE_CONTROLS_GRADE_VISIBILITY) &&
component_callback_exists('mod_' . $modulename, 'grade_item_update')) {
$instance = $DB->get_record($modulename, array('id' => $cm->instance), '*', MUST_EXIST);
component_callback('mod_' . $modulename, 'grade_item_update', array($instance));
} else if ($cm->visible != $visible) {
$grade_items = grade_item::fetch_all(array('itemtype'=>'mod', 'itemmodule'=>$modulename, 'iteminstance'=>$cm->instance, 'courseid'=>$cm->course));
if ($grade_items) {
foreach ($grade_items as $grade_item) {
$grade_item->set_hidden(!$visible);
}
}
}
rebuild_course_cache($cm->course, true);
return true;
}
/**
* Changes the course module name
*
* @param int $id course module id
* @param string $name new value for a name
* @return bool whether a change was made
*/
function set_coursemodule_name($id, $name) {
global $CFG, $DB;
require_once($CFG->libdir . '/gradelib.php');
$cm = get_coursemodule_from_id('', $id, 0, false, MUST_EXIST);
$module = new \stdClass();
$module->id = $cm->instance;
// Escape strings as they would be by mform.
if (!empty($CFG->formatstringstriptags)) {
$module->name = clean_param($name, PARAM_TEXT);
} else {
$module->name = clean_param($name, PARAM_CLEANHTML);
}
if ($module->name === $cm->name || strval($module->name) === '') {
return false;
}
if (\core_text::strlen($module->name) > 255) {
throw new \moodle_exception('maximumchars', 'moodle', '', 255);
}
$module->timemodified = time();
$DB->update_record($cm->modname, $module);
$cm->name = $module->name;
\core\event\course_module_updated::create_from_cm($cm)->trigger();
rebuild_course_cache($cm->course, true);
// Attempt to update the grade item if relevant.
$grademodule = $DB->get_record($cm->modname, array('id' => $cm->instance));
$grademodule->cmidnumber = $cm->idnumber;
$grademodule->modname = $cm->modname;
grade_update_mod_grades($grademodule);
// Update calendar events with the new name.
course_module_update_calendar_events($cm->modname, $grademodule, $cm);
return true;
}
/**
* This function will handle the whole deletion process of a module. This includes calling
* the modules delete_instance function, deleting files, events, grades, conditional data,
* the data in the course_module and course_sections table and adding a module deletion
* event to the DB.
*
* @param int $cmid the course module id
* @param bool $async whether or not to try to delete the module using an adhoc task. Async also depends on a plugin hook.
* @throws moodle_exception
* @since Moodle 2.5
*/
function course_delete_module($cmid, $async = false) {
// Check the 'course_module_background_deletion_recommended' hook first.
// Only use asynchronous deletion if at least one plugin returns true and if async deletion has been requested.
// Both are checked because plugins should not be allowed to dictate the deletion behaviour, only support/decline it.
// It's up to plugins to handle things like whether or not they are enabled.
if ($async && $pluginsfunction = get_plugins_with_function('course_module_background_deletion_recommended')) {
foreach ($pluginsfunction as $plugintype => $plugins) {
foreach ($plugins as $pluginfunction) {
if ($pluginfunction()) {
return course_module_flag_for_async_deletion($cmid);
}
}
}
}
global $CFG, $DB;
require_once($CFG->libdir.'/gradelib.php');
require_once($CFG->libdir.'/questionlib.php');
require_once($CFG->dirroot.'/blog/lib.php');
require_once($CFG->dirroot.'/calendar/lib.php');
// Get the course module.
if (!$cm = $DB->get_record('course_modules', array('id' => $cmid))) {
return true;
}
// Get the module context.
$modcontext = context_module::instance($cm->id);
// Get the course module name.
$modulename = $DB->get_field('modules', 'name', array('id' => $cm->module), MUST_EXIST);
// Get the file location of the delete_instance function for this module.
$modlib = "$CFG->dirroot/mod/$modulename/lib.php";
// Include the file required to call the delete_instance function for this module.
if (file_exists($modlib)) {
require_once($modlib);
} else {
throw new moodle_exception('cannotdeletemodulemissinglib', '', '', null,
"Cannot delete this module as the file mod/$modulename/lib.php is missing.");
}
$deleteinstancefunction = $modulename . '_delete_instance';
// Ensure the delete_instance function exists for this module.
if (!function_exists($deleteinstancefunction)) {
throw new moodle_exception('cannotdeletemodulemissingfunc', '', '', null,
"Cannot delete this module as the function {$modulename}_delete_instance is missing in mod/$modulename/lib.php.");
}
// Allow plugins to use this course module before we completely delete it.
if ($pluginsfunction = get_plugins_with_function('pre_course_module_delete')) {
foreach ($pluginsfunction as $plugintype => $plugins) {
foreach ($plugins as $pluginfunction) {
$pluginfunction($cm);
}
}
}
// Delete activity context questions and question categories.
$showinfo = !defined('AJAX_SCRIPT') || AJAX_SCRIPT == '0';
question_delete_activity($cm, $showinfo);
// Call the delete_instance function, if it returns false throw an exception.
if (!$deleteinstancefunction($cm->instance)) {
throw new moodle_exception('cannotdeletemoduleinstance', '', '', null,
"Cannot delete the module $modulename (instance).");
}
// Remove all module files in case modules forget to do that.
$fs = get_file_storage();
$fs->delete_area_files($modcontext->id);
// Delete events from calendar.
if ($events = $DB->get_records('event', array('instance' => $cm->instance, 'modulename' => $modulename))) {
$coursecontext = context_course::instance($cm->course);
foreach($events as $event) {
$event->context = $coursecontext;
$calendarevent = calendar_event::load($event);
$calendarevent->delete();
}
}
// Delete grade items, outcome items and grades attached to modules.
if ($grade_items = grade_item::fetch_all(array('itemtype' => 'mod', 'itemmodule' => $modulename,
'iteminstance' => $cm->instance, 'courseid' => $cm->course))) {
foreach ($grade_items as $grade_item) {
$grade_item->delete('moddelete');
}
}
// Delete associated blogs and blog tag instances.
blog_remove_associations_for_module($modcontext->id);
// Delete completion and availability data; it is better to do this even if the
// features are not turned on, in case they were turned on previously (these will be
// very quick on an empty table).
$DB->delete_records('course_modules_completion', array('coursemoduleid' => $cm->id));
$DB->delete_records('course_completion_criteria', array('moduleinstance' => $cm->id,
'course' => $cm->course,
'criteriatype' => COMPLETION_CRITERIA_TYPE_ACTIVITY));
// Delete all tag instances associated with the instance of this module.
core_tag_tag::delete_instances('mod_' . $modulename, null, $modcontext->id);
core_tag_tag::remove_all_item_tags('core', 'course_modules', $cm->id);
// Notify the competency subsystem.
\core_competency\api::hook_course_module_deleted($cm);
// Delete the context.
context_helper::delete_instance(CONTEXT_MODULE, $cm->id);
// Delete the module from the course_modules table.
$DB->delete_records('course_modules', array('id' => $cm->id));
// Delete module from that section.
if (!delete_mod_from_section($cm->id, $cm->section)) {
throw new moodle_exception('cannotdeletemodulefromsection', '', '', null,
"Cannot delete the module $modulename (instance) from section.");
}
// Trigger event for course module delete action.
$event = \core\event\course_module_deleted::create(array(
'courseid' => $cm->course,
'context' => $modcontext,
'objectid' => $cm->id,
'other' => array(
'modulename' => $modulename,
'instanceid' => $cm->instance,
)
));
$event->add_record_snapshot('course_modules', $cm);
$event->trigger();
rebuild_course_cache($cm->course, true);
}
/**
* Schedule a course module for deletion in the background using an adhoc task.
*
* This method should not be called directly. Instead, please use course_delete_module($cmid, true), to denote async deletion.
* The real deletion of the module is handled by the task, which calls 'course_delete_module($cmid)'.
*
* @param int $cmid the course module id.
* @return bool whether the module was successfully scheduled for deletion.
* @throws \moodle_exception
*/
function course_module_flag_for_async_deletion($cmid) {
global $CFG, $DB, $USER;
require_once($CFG->libdir.'/gradelib.php');
require_once($CFG->libdir.'/questionlib.php');
require_once($CFG->dirroot.'/blog/lib.php');
require_once($CFG->dirroot.'/calendar/lib.php');
// Get the course module.
if (!$cm = $DB->get_record('course_modules', array('id' => $cmid))) {
return true;
}
// We need to be reasonably certain the deletion is going to succeed before we background the process.
// Make the necessary delete_instance checks, etc. before proceeding further. Throw exceptions if required.
// Get the course module name.
$modulename = $DB->get_field('modules', 'name', array('id' => $cm->module), MUST_EXIST);
// Get the file location of the delete_instance function for this module.
$modlib = "$CFG->dirroot/mod/$modulename/lib.php";
// Include the file required to call the delete_instance function for this module.
if (file_exists($modlib)) {
require_once($modlib);
} else {
throw new \moodle_exception('cannotdeletemodulemissinglib', '', '', null,
"Cannot delete this module as the file mod/$modulename/lib.php is missing.");
}
$deleteinstancefunction = $modulename . '_delete_instance';
// Ensure the delete_instance function exists for this module.
if (!function_exists($deleteinstancefunction)) {
throw new \moodle_exception('cannotdeletemodulemissingfunc', '', '', null,
"Cannot delete this module as the function {$modulename}_delete_instance is missing in mod/$modulename/lib.php.");
}
// We are going to defer the deletion as we can't be sure how long the module's pre_delete code will run for.
$cm->deletioninprogress = '1';
$DB->update_record('course_modules', $cm);
// Create an adhoc task for the deletion of the course module. The task takes an array of course modules for removal.
$removaltask = new \core_course\task\course_delete_modules();
$removaltask->set_custom_data(array(
'cms' => array($cm),
'userid' => $USER->id,
'realuserid' => \core\session\manager::get_realuser()->id
));
// Queue the task for the next run.
\core\task\manager::queue_adhoc_task($removaltask);
// Reset the course cache to hide the module.
rebuild_course_cache($cm->course, true);
}
/**
* Checks whether the given course has any course modules scheduled for adhoc deletion.
*
* @param int $courseid the id of the course.
* @param bool $onlygradable whether to check only gradable modules or all modules.
* @return bool true if the course contains any modules pending deletion, false otherwise.
*/
function course_modules_pending_deletion(int $courseid, bool $onlygradable = false) : bool {
if (empty($courseid)) {
return false;
}
if ($onlygradable) {
// Fetch modules with grade items.
if (!$coursegradeitems = grade_item::fetch_all(['itemtype' => 'mod', 'courseid' => $courseid])) {
// Return early when there is none.
return false;
}
}
$modinfo = get_fast_modinfo($courseid);
foreach ($modinfo->get_cms() as $module) {
if ($module->deletioninprogress == '1') {
if ($onlygradable) {
// Check if the module being deleted is in the list of course modules with grade items.
foreach ($coursegradeitems as $coursegradeitem) {
if ($coursegradeitem->itemmodule == $module->modname && $coursegradeitem->iteminstance == $module->instance) {
// The module being deleted is within the gradable modules.
return true;
}
}
} else {
return true;
}
}
}
return false;
}
/**
* Checks whether the course module, as defined by modulename and instanceid, is scheduled for deletion within the given course.
*
* @param int $courseid the course id.
* @param string $modulename the module name. E.g. 'assign', 'book', etc.
* @param int $instanceid the module instance id.
* @return bool true if the course module is pending deletion, false otherwise.
*/
function course_module_instance_pending_deletion($courseid, $modulename, $instanceid) {
if (empty($courseid) || empty($modulename) || empty($instanceid)) {
return false;
}
$modinfo = get_fast_modinfo($courseid);
$instances = $modinfo->get_instances_of($modulename);
return isset($instances[$instanceid]) && $instances[$instanceid]->deletioninprogress;
}
function delete_mod_from_section($modid, $sectionid) {
global $DB;
if ($section = $DB->get_record("course_sections", array("id"=>$sectionid)) ) {
$modarray = explode(",", $section->sequence);
if ($key = array_keys ($modarray, $modid)) {
array_splice($modarray, $key[0], 1);
$newsequence = implode(",", $modarray);
$DB->set_field("course_sections", "sequence", $newsequence, array("id"=>$section->id));
rebuild_course_cache($section->course, true);
return true;
} else {
return false;
}
}
return false;
}
/**
* This function updates the calendar events from the information stored in the module table and the course
* module table.
*
* @param string $modulename Module name
* @param stdClass $instance Module object. Either the $instance or the $cm must be supplied.
* @param stdClass $cm Course module object. Either the $instance or the $cm must be supplied.
* @return bool Returns true if calendar events are updated.
* @since Moodle 3.3.4
*/
function course_module_update_calendar_events($modulename, $instance = null, $cm = null) {
global $DB;
if (isset($instance) || isset($cm)) {
if (!isset($instance)) {
$instance = $DB->get_record($modulename, array('id' => $cm->instance), '*', MUST_EXIST);
}
if (!isset($cm)) {
$cm = get_coursemodule_from_instance($modulename, $instance->id, $instance->course);
}
if (!empty($cm)) {
course_module_calendar_event_update_process($instance, $cm);
}
return true;
}
return false;
}
/**
* Update all instances through out the site or in a course.
*
* @param string $modulename Module type to update.
* @param integer $courseid Course id to update events. 0 for the whole site.
* @return bool Returns True if the update was successful.
* @since Moodle 3.3.4
*/
function course_module_bulk_update_calendar_events($modulename, $courseid = 0) {
global $DB;
$instances = null;
if ($courseid) {
if (!$instances = $DB->get_records($modulename, array('course' => $courseid))) {
return false;
}
} else {
if (!$instances = $DB->get_records($modulename)) {
return false;
}
}
foreach ($instances as $instance) {
if ($cm = get_coursemodule_from_instance($modulename, $instance->id, $instance->course)) {
course_module_calendar_event_update_process($instance, $cm);
}
}
return true;
}
/**
* Calendar events for a module instance are updated.
*
* @param stdClass $instance Module instance object.
* @param stdClass $cm Course Module object.
* @since Moodle 3.3.4
*/
function course_module_calendar_event_update_process($instance, $cm) {
// We need to call *_refresh_events() first because some modules delete 'old' events at the end of the code which
// will remove the completion events.
$refresheventsfunction = $cm->modname . '_refresh_events';
if (function_exists($refresheventsfunction)) {
call_user_func($refresheventsfunction, $cm->course, $instance, $cm);
}
$completionexpected = (!empty($cm->completionexpected)) ? $cm->completionexpected : null;
\core_completion\api::update_completion_date_event($cm->id, $cm->modname, $instance, $completionexpected);
}
/**
* Moves a section within a course, from a position to another.
* Be very careful: $section and $destination refer to section number,
* not id!.
*
* @param object $course
* @param int $section Section number (not id!!!)
* @param int $destination
* @param bool $ignorenumsections
* @return boolean Result
*/
function move_section_to($course, $section, $destination, $ignorenumsections = false) {
/// Moves a whole course section up and down within the course
global $USER, $DB;
if (!$destination && $destination != 0) {
return true;
}
// compartibility with course formats using field 'numsections'
$courseformatoptions = course_get_format($course)->get_format_options();
if ((!$ignorenumsections && array_key_exists('numsections', $courseformatoptions) &&
($destination > $courseformatoptions['numsections'])) || ($destination < 1)) {
return false;
}
// Get all sections for this course and re-order them (2 of them should now share the same section number)
if (!$sections = $DB->get_records_menu('course_sections', array('course' => $course->id),
'section ASC, id ASC', 'id, section')) {
return false;
}
$movedsections = reorder_sections($sections, $section, $destination);
// Update all sections. Do this in 2 steps to avoid breaking database
// uniqueness constraint
$transaction = $DB->start_delegated_transaction();
foreach ($movedsections as $id => $position) {
if ($sections[$id] !== $position) {
$DB->set_field('course_sections', 'section', -$position, array('id' => $id));
}
}
foreach ($movedsections as $id => $position) {
if ($sections[$id] !== $position) {
$DB->set_field('course_sections', 'section', $position, array('id' => $id));
}
}
// If we move the highlighted section itself, then just highlight the destination.
// Adjust the higlighted section location if we move something over it either direction.
if ($section == $course->marker) {
course_set_marker($course->id, $destination);
} elseif ($section > $course->marker && $course->marker >= $destination) {
course_set_marker($course->id, $course->marker+1);
} elseif ($section < $course->marker && $course->marker <= $destination) {
course_set_marker($course->id, $course->marker-1);
}
$transaction->allow_commit();
rebuild_course_cache($course->id, true);
return true;
}
/**
* This method will delete a course section and may delete all modules inside it.
*
* No permissions are checked here, use {@link course_can_delete_section()} to
* check if section can actually be deleted.
*
* @param int|stdClass $course
* @param int|stdClass|section_info $section
* @param bool $forcedeleteifnotempty if set to false section will not be deleted if it has modules in it.
* @param bool $async whether or not to try to delete the section using an adhoc task. Async also depends on a plugin hook.
* @return bool whether section was deleted
*/
function course_delete_section($course, $section, $forcedeleteifnotempty = true, $async = false) {
global $DB;
// Prepare variables.
$courseid = (is_object($course)) ? $course->id : (int)$course;
$sectionnum = (is_object($section)) ? $section->section : (int)$section;
$section = $DB->get_record('course_sections', array('course' => $courseid, 'section' => $sectionnum));
if (!$section) {
// No section exists, can't proceed.
return false;
}
// Check the 'course_module_background_deletion_recommended' hook first.
// Only use asynchronous deletion if at least one plugin returns true and if async deletion has been requested.
// Both are checked because plugins should not be allowed to dictate the deletion behaviour, only support/decline it.
// It's up to plugins to handle things like whether or not they are enabled.
if ($async && $pluginsfunction = get_plugins_with_function('course_module_background_deletion_recommended')) {
foreach ($pluginsfunction as $plugintype => $plugins) {
foreach ($plugins as $pluginfunction) {
if ($pluginfunction()) {
return course_delete_section_async($section, $forcedeleteifnotempty);
}
}
}
}
$format = course_get_format($course);
$sectionname = $format->get_section_name($section);
// Delete section.
$result = $format->delete_section($section, $forcedeleteifnotempty);
// Trigger an event for course section deletion.
if ($result) {
$context = context_course::instance($courseid);
$event = \core\event\course_section_deleted::create(
array(
'objectid' => $section->id,
'courseid' => $courseid,
'context' => $context,
'other' => array(
'sectionnum' => $section->section,
'sectionname' => $sectionname,
)
)
);
$event->add_record_snapshot('course_sections', $section);
$event->trigger();
}
return $result;
}
/**
* Course section deletion, using an adhoc task for deletion of the modules it contains.
* 1. Schedule all modules within the section for adhoc removal.
* 2. Move all modules to course section 0.
* 3. Delete the resulting empty section.
*
* @param \stdClass $section the section to schedule for deletion.
* @param bool $forcedeleteifnotempty whether to force section deletion if it contains modules.
* @return bool true if the section was scheduled for deletion, false otherwise.
*/
function course_delete_section_async($section, $forcedeleteifnotempty = true) {
global $DB, $USER;
// Objects only, and only valid ones.
if (!is_object($section) || empty($section->id)) {
return false;
}
// Does the object currently exist in the DB for removal (check for stale objects).
$section = $DB->get_record('course_sections', array('id' => $section->id));
if (!$section || !$section->section) {
// No section exists, or the section is 0. Can't proceed.
return false;
}
// Check whether the section can be removed.
if (!$forcedeleteifnotempty && (!empty($section->sequence) || !empty($section->summary))) {
return false;
}
$format = course_get_format($section->course);
$sectionname = $format->get_section_name($section);
// Flag those modules having no existing deletion flag. Some modules may have been scheduled for deletion manually, and we don't
// want to create additional adhoc deletion tasks for these. Moving them to section 0 will suffice.
$affectedmods = $DB->get_records_select('course_modules', 'course = ? AND section = ? AND deletioninprogress <> ?',
[$section->course, $section->id, 1], '', 'id');
$DB->set_field('course_modules', 'deletioninprogress', '1', ['course' => $section->course, 'section' => $section->id]);
// Move all modules to section 0.
$modules = $DB->get_records('course_modules', ['section' => $section->id], '');
$sectionzero = $DB->get_record('course_sections', ['course' => $section->course, 'section' => '0']);
foreach ($modules as $mod) {
moveto_module($mod, $sectionzero);
}
// Create and queue an adhoc task for the deletion of the modules.
$removaltask = new \core_course\task\course_delete_modules();
$data = array(
'cms' => $affectedmods,
'userid' => $USER->id,
'realuserid' => \core\session\manager::get_realuser()->id
);
$removaltask->set_custom_data($data);
\core\task\manager::queue_adhoc_task($removaltask);
// Delete the now empty section, passing in only the section number, which forces the function to fetch a new object.
// The refresh is needed because the section->sequence is now stale.
$result = $format->delete_section($section->section, $forcedeleteifnotempty);
// Trigger an event for course section deletion.
if ($result) {
$context = \context_course::instance($section->course);
$event = \core\event\course_section_deleted::create(
array(
'objectid' => $section->id,
'courseid' => $section->course,
'context' => $context,
'other' => array(
'sectionnum' => $section->section,
'sectionname' => $sectionname,
)
)
);
$event->add_record_snapshot('course_sections', $section);
$event->trigger();
}
rebuild_course_cache($section->course, true);
return $result;
}
/**
* Updates the course section
*
* This function does not check permissions or clean values - this has to be done prior to calling it.
*
* @param int|stdClass $course
* @param stdClass $section record from course_sections table - it will be updated with the new values
* @param array|stdClass $data
*/
function course_update_section($course, $section, $data) {
global $DB;
$courseid = (is_object($course)) ? $course->id : (int)$course;
// Some fields can not be updated using this method.
$data = array_diff_key((array)$data, array('id', 'course', 'section', 'sequence'));
$changevisibility = (array_key_exists('visible', $data) && (bool)$data['visible'] != (bool)$section->visible);
if (array_key_exists('name', $data) && \core_text::strlen($data['name']) > 255) {
throw new moodle_exception('maximumchars', 'moodle', '', 255);
}
// Update record in the DB and course format options.
$data['id'] = $section->id;
$data['timemodified'] = time();
$DB->update_record('course_sections', $data);
rebuild_course_cache($courseid, true);
course_get_format($courseid)->update_section_format_options($data);
// Update fields of the $section object.
foreach ($data as $key => $value) {
if (property_exists($section, $key)) {
$section->$key = $value;
}
}
// Trigger an event for course section update.
$event = \core\event\course_section_updated::create(
array(
'objectid' => $section->id,
'courseid' => $courseid,
'context' => context_course::instance($courseid),
'other' => array('sectionnum' => $section->section)
)
);
$event->trigger();
// If section visibility was changed, hide the modules in this section too.
if ($changevisibility && !empty($section->sequence)) {
$modules = explode(',', $section->sequence);
foreach ($modules as $moduleid) {
if ($cm = get_coursemodule_from_id(null, $moduleid, $courseid)) {
if ($data['visible']) {
// As we unhide the section, we use the previously saved visibility stored in visibleold.
set_coursemodule_visible($moduleid, $cm->visibleold, $cm->visibleoncoursepage);
} else {
// We hide the section, so we hide the module but we store the original state in visibleold.
set_coursemodule_visible($moduleid, 0, $cm->visibleoncoursepage);
$DB->set_field('course_modules', 'visibleold', $cm->visible, array('id' => $moduleid));
}
\core\event\course_module_updated::create_from_cm($cm)->trigger();
}
}
}
}
/**
* Checks if the current user can delete a section (if course format allows it and user has proper permissions).
*
* @param int|stdClass $course
* @param int|stdClass|section_info $section
* @return bool
*/
function course_can_delete_section($course, $section) {
if (is_object($section)) {
$section = $section->section;
}
if (!$section) {
// Not possible to delete 0-section.
return false;
}
// Course format should allow to delete sections.
if (!course_get_format($course)->can_delete_section($section)) {
return false;
}
// Make sure user has capability to update course and move sections.
$context = context_course::instance(is_object($course) ? $course->id : $course);
if (!has_all_capabilities(array('moodle/course:movesections', 'moodle/course:update'), $context)) {
return false;
}
// Make sure user has capability to delete each activity in this section.
$modinfo = get_fast_modinfo($course);
if (!empty($modinfo->sections[$section])) {
foreach ($modinfo->sections[$section] as $cmid) {
if (!has_capability('moodle/course:manageactivities', context_module::instance($cmid))) {
return false;
}
}
}
return true;
}
/**
* Reordering algorithm for course sections. Given an array of section->section indexed by section->id,
* an original position number and a target position number, rebuilds the array so that the
* move is made without any duplication of section positions.
* Note: The target_position is the position AFTER WHICH the moved section will be inserted. If you want to
* insert a section before the first one, you must give 0 as the target (section 0 can never be moved).
*
* @param array $sections
* @param int $origin_position
* @param int $target_position
* @return array
*/
function reorder_sections($sections, $origin_position, $target_position) {
if (!is_array($sections)) {
return false;
}
// We can't move section position 0
if ($origin_position < 1) {
echo "We can't move section position 0";
return false;
}
// Locate origin section in sections array
if (!$origin_key = array_search($origin_position, $sections)) {
echo "searched position not in sections array";
return false; // searched position not in sections array
}
// Extract origin section
$origin_section = $sections[$origin_key];
unset($sections[$origin_key]);
// Find offset of target position (stupid PHP's array_splice requires offset instead of key index!)
$found = false;
$append_array = array();
foreach ($sections as $id => $position) {
if ($found) {
$append_array[$id] = $position;
unset($sections[$id]);
}
if ($position == $target_position) {
if ($target_position < $origin_position) {
$append_array[$id] = $position;
unset($sections[$id]);
}
$found = true;
}
}
// Append moved section
$sections[$origin_key] = $origin_section;
// Append rest of array (if applicable)
if (!empty($append_array)) {
foreach ($append_array as $id => $position) {
$sections[$id] = $position;
}
}
// Renumber positions
$position = 0;
foreach ($sections as $id => $p) {
$sections[$id] = $position;
$position++;
}
return $sections;
}
/**
* Move the module object $mod to the specified $section
* If $beforemod exists then that is the module
* before which $modid should be inserted
*
* @param stdClass|cm_info $mod
* @param stdClass|section_info $section
* @param int|stdClass $beforemod id or object with field id corresponding to the module
* before which the module needs to be included. Null for inserting in the
* end of the section
* @return int new value for module visibility (0 or 1)
*/
function moveto_module($mod, $section, $beforemod=NULL) {
global $OUTPUT, $DB;
// Current module visibility state - return value of this function.
$modvisible = $mod->visible;
// Remove original module from original section.
if (! delete_mod_from_section($mod->id, $mod->section)) {
echo $OUTPUT->notification("Could not delete module from existing section");
}
// If moving to a hidden section then hide module.
if ($mod->section != $section->id) {
if (!$section->visible && $mod->visible) {
// Module was visible but must become hidden after moving to hidden section.
$modvisible = 0;
set_coursemodule_visible($mod->id, 0);
// Set visibleold to 1 so module will be visible when section is made visible.
$DB->set_field('course_modules', 'visibleold', 1, array('id' => $mod->id));
}
if ($section->visible && !$mod->visible) {
// Hidden module was moved to the visible section, restore the module visibility from visibleold.
set_coursemodule_visible($mod->id, $mod->visibleold);
$modvisible = $mod->visibleold;
}
}
// Add the module into the new section.
course_add_cm_to_section($section->course, $mod->id, $section->section, $beforemod);
return $modvisible;
}
/**
* Returns the list of all editing actions that current user can perform on the module
*
* @param cm_info $mod The module to produce editing buttons for
* @param int $indent The current indenting (default -1 means no move left-right actions)
* @param int $sr The section to link back to (used for creating the links)
* @return array array of action_link or pix_icon objects
*/
function course_get_cm_edit_actions(cm_info $mod, $indent = -1, $sr = null) {
global $COURSE, $SITE, $CFG;
static $str;
$coursecontext = context_course::instance($mod->course);
$modcontext = context_module::instance($mod->id);
$courseformat = course_get_format($mod->get_course());
$editcaps = array('moodle/course:manageactivities', 'moodle/course:activityvisibility', 'moodle/role:assign');
$dupecaps = array('moodle/backup:backuptargetimport', 'moodle/restore:restoretargetimport');
// No permission to edit anything.
if (!has_any_capability($editcaps, $modcontext) and !has_all_capabilities($dupecaps, $coursecontext)) {
return array();
}
$hasmanageactivities = has_capability('moodle/course:manageactivities', $modcontext);
if (!isset($str)) {
$str = get_strings(array('delete', 'move', 'moveright', 'moveleft',
'editsettings', 'duplicate', 'modhide', 'makeavailable', 'makeunavailable', 'modshow'), 'moodle');
$str->assign = get_string('assignroles', 'role');
$str->groupsnone = get_string('clicktochangeinbrackets', 'moodle', get_string("groupsnone"));
$str->groupsseparate = get_string('clicktochangeinbrackets', 'moodle', get_string("groupsseparate"));
$str->groupsvisible = get_string('clicktochangeinbrackets', 'moodle', get_string("groupsvisible"));
}
$baseurl = new moodle_url('/course/mod.php', array('sesskey' => sesskey()));
if ($sr !== null) {
$baseurl->param('sr', $sr);
}
$actions = array();
// Update.
if ($hasmanageactivities) {
$actions['update'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('update' => $mod->id)),
new pix_icon('t/edit', '', 'moodle', array('class' => 'iconsmall')),
$str->editsettings,
array('class' => 'editing_update', 'data-action' => 'update')
);
}
// Indent.
if ($hasmanageactivities && $indent >= 0) {
$indentlimits = new stdClass();
$indentlimits->min = 0;
$indentlimits->max = 16;
if (right_to_left()) { // Exchange arrows on RTL
$rightarrow = 't/left';
$leftarrow = 't/right';
} else {
$rightarrow = 't/right';
$leftarrow = 't/left';
}
if ($indent >= $indentlimits->max) {
$enabledclass = 'hidden';
} else {
$enabledclass = '';
}
$actions['moveright'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('id' => $mod->id, 'indent' => '1')),
new pix_icon($rightarrow, '', 'moodle', array('class' => 'iconsmall')),
$str->moveright,
array('class' => 'editing_moveright ' . $enabledclass, 'data-action' => 'moveright',
'data-keepopen' => true, 'data-sectionreturn' => $sr)
);
if ($indent <= $indentlimits->min) {
$enabledclass = 'hidden';
} else {
$enabledclass = '';
}
$actions['moveleft'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('id' => $mod->id, 'indent' => '-1')),
new pix_icon($leftarrow, '', 'moodle', array('class' => 'iconsmall')),
$str->moveleft,
array('class' => 'editing_moveleft ' . $enabledclass, 'data-action' => 'moveleft',
'data-keepopen' => true, 'data-sectionreturn' => $sr)
);
}
// Hide/Show/Available/Unavailable.
if (has_capability('moodle/course:activityvisibility', $modcontext)) {
$allowstealth = !empty($CFG->allowstealth) && $courseformat->allow_stealth_module_visibility($mod, $mod->get_section_info());
$sectionvisible = $mod->get_section_info()->visible;
// The module on the course page may be in one of the following states:
// - Available and displayed on the course page ($displayedoncoursepage);
// - Not available and not displayed on the course page ($unavailable);
// - Available but not displayed on the course page ($stealth) - this can also be a visible activity in a hidden section.
$displayedoncoursepage = $mod->visible && $mod->visibleoncoursepage && $sectionvisible;
$unavailable = !$mod->visible;
$stealth = $mod->visible && (!$mod->visibleoncoursepage || !$sectionvisible);
if ($displayedoncoursepage) {
$actions['hide'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('hide' => $mod->id)),
new pix_icon('t/hide', '', 'moodle', array('class' => 'iconsmall')),
$str->modhide,
array('class' => 'editing_hide', 'data-action' => 'hide')
);
} else if (!$displayedoncoursepage && $sectionvisible) {
// Offer to "show" only if the section is visible.
$actions['show'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('show' => $mod->id)),
new pix_icon('t/show', '', 'moodle', array('class' => 'iconsmall')),
$str->modshow,
array('class' => 'editing_show', 'data-action' => 'show')
);
}
if ($stealth) {
// When making the "stealth" module unavailable we perform the same action as hiding the visible module.
$actions['hide'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('hide' => $mod->id)),
new pix_icon('t/unblock', '', 'moodle', array('class' => 'iconsmall')),
$str->makeunavailable,
array('class' => 'editing_makeunavailable', 'data-action' => 'hide', 'data-sectionreturn' => $sr)
);
} else if ($unavailable && (!$sectionvisible || $allowstealth) && $mod->has_view()) {
// Allow to make visually hidden module available in gradebook and other reports by making it a "stealth" module.
// When the section is hidden it is an equivalent of "showing" the module.
// Activities without the link (i.e. labels) can not be made available but hidden on course page.
$action = $sectionvisible ? 'stealth' : 'show';
$actions[$action] = new action_menu_link_secondary(
new moodle_url($baseurl, array($action => $mod->id)),
new pix_icon('t/block', '', 'moodle', array('class' => 'iconsmall')),
$str->makeavailable,
array('class' => 'editing_makeavailable', 'data-action' => $action, 'data-sectionreturn' => $sr)
);
}
}
// Duplicate (require both target import caps to be able to duplicate and backup2 support, see modduplicate.php)
if (has_all_capabilities($dupecaps, $coursecontext) &&
plugin_supports('mod', $mod->modname, FEATURE_BACKUP_MOODLE2) &&
course_allowed_module($mod->get_course(), $mod->modname)) {
$actions['duplicate'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('duplicate' => $mod->id)),
new pix_icon('t/copy', '', 'moodle', array('class' => 'iconsmall')),
$str->duplicate,
array('class' => 'editing_duplicate', 'data-action' => 'duplicate', 'data-sectionreturn' => $sr)
);
}
// Groupmode.
if ($hasmanageactivities && !$mod->coursegroupmodeforce) {
if (plugin_supports('mod', $mod->modname, FEATURE_GROUPS, false)) {
if ($mod->effectivegroupmode == SEPARATEGROUPS) {
$nextgroupmode = VISIBLEGROUPS;
$grouptitle = $str->groupsseparate;
$actionname = 'groupsseparate';
$nextactionname = 'groupsvisible';
$groupimage = 'i/groups';
} else if ($mod->effectivegroupmode == VISIBLEGROUPS) {
$nextgroupmode = NOGROUPS;
$grouptitle = $str->groupsvisible;
$actionname = 'groupsvisible';
$nextactionname = 'groupsnone';
$groupimage = 'i/groupv';
} else {
$nextgroupmode = SEPARATEGROUPS;
$grouptitle = $str->groupsnone;
$actionname = 'groupsnone';
$nextactionname = 'groupsseparate';
$groupimage = 'i/groupn';
}
$actions[$actionname] = new action_menu_link_primary(
new moodle_url($baseurl, array('id' => $mod->id, 'groupmode' => $nextgroupmode)),
new pix_icon($groupimage, '', 'moodle', array('class' => 'iconsmall')),
$grouptitle,
array('class' => 'editing_'. $actionname, 'data-action' => $nextactionname,
'aria-live' => 'assertive', 'data-sectionreturn' => $sr)
);
} else {
$actions['nogroupsupport'] = new action_menu_filler();
}
}
// Assign.
if (has_capability('moodle/role:assign', $modcontext)){
$actions['assign'] = new action_menu_link_secondary(
new moodle_url('/admin/roles/assign.php', array('contextid' => $modcontext->id)),
new pix_icon('t/assignroles', '', 'moodle', array('class' => 'iconsmall')),
$str->assign,
array('class' => 'editing_assign', 'data-action' => 'assignroles', 'data-sectionreturn' => $sr)
);
}
// Delete.
if ($hasmanageactivities) {
$actions['delete'] = new action_menu_link_secondary(
new moodle_url($baseurl, array('delete' => $mod->id)),
new pix_icon('t/delete', '', 'moodle', array('class' => 'iconsmall')),
$str->delete,
array('class' => 'editing_delete', 'data-action' => 'delete', 'data-sectionreturn' => $sr)
);
}
return $actions;
}
/**
* Returns the move action.
*
* @param cm_info $mod The module to produce a move button for
* @param int $sr The section to link back to (used for creating the links)
* @return The markup for the move action, or an empty string if not available.
*/
function course_get_cm_move(cm_info $mod, $sr = null) {
global $OUTPUT;
static $str;
static $baseurl;
$modcontext = context_module::instance($mod->id);
$hasmanageactivities = has_capability('moodle/course:manageactivities', $modcontext);
if (!isset($str)) {
$str = get_strings(array('move'));
}
if (!isset($baseurl)) {
$baseurl = new moodle_url('/course/mod.php', array('sesskey' => sesskey()));
if ($sr !== null) {
$baseurl->param('sr', $sr);
}
}
if ($hasmanageactivities) {
$pixicon = 'i/dragdrop';
if (!course_ajax_enabled($mod->get_course())) {
// Override for course frontpage until we get drag/drop working there.
$pixicon = 't/move';
}
return html_writer::link(
new moodle_url($baseurl, array('copy' => $mod->id)),
$OUTPUT->pix_icon($pixicon, $str->move, 'moodle', array('class' => 'iconsmall', 'title' => '')),
array('class' => 'editing_move', 'data-action' => 'move', 'data-sectionreturn' => $sr)
);
}
return '';
}
/**
* given a course object with shortname & fullname, this function will
* truncate the the number of chars allowed and add ... if it was too long
*/
function course_format_name ($course,$max=100) {
$context = context_course::instance($course->id);
$shortname = format_string($course->shortname, true, array('context' => $context));
$fullname = format_string($course->fullname, true, array('context' => context_course::instance($course->id)));
$str = $shortname.': '. $fullname;
if (core_text::strlen($str) <= $max) {
return $str;
}
else {
return core_text::substr($str,0,$max-3).'...';
}
}
/**
* Is the user allowed to add this type of module to this course?
* @param object $course the course settings. Only $course->id is used.
* @param string $modname the module name. E.g. 'forum' or 'quiz'.
* @return bool whether the current user is allowed to add this type of module to this course.
*/
function course_allowed_module($course, $modname) {
if (is_numeric($modname)) {
throw new coding_exception('Function course_allowed_module no longer
supports numeric module ids. Please update your code to pass the module name.');
}
$capability = 'mod/' . $modname . ':addinstance';
if (!get_capability_info($capability)) {
// Debug warning that the capability does not exist, but no more than once per page.
static $warned = array();
$archetype = plugin_supports('mod', $modname, FEATURE_MOD_ARCHETYPE, MOD_ARCHETYPE_OTHER);
if (!isset($warned[$modname]) && $archetype !== MOD_ARCHETYPE_SYSTEM) {
debugging('The module ' . $modname . ' does not define the standard capability ' .
$capability , DEBUG_DEVELOPER);
$warned[$modname] = 1;
}
// If the capability does not exist, the module can always be added.
return true;
}
$coursecontext = context_course::instance($course->id);
return has_capability($capability, $coursecontext);
}
/**
* Efficiently moves many courses around while maintaining
* sortorder in order.
*
* @param array $courseids is an array of course ids
* @param int $categoryid
* @return bool success
*/
function move_courses($courseids, $categoryid) {
global $DB;
if (empty($courseids)) {
// Nothing to do.
return false;
}
if (!$category = $DB->get_record('course_categories', array('id' => $categoryid))) {
return false;
}
$courseids = array_reverse($courseids);
$newparent = context_coursecat::instance($category->id);
$i = 1;
list($where, $params) = $DB->get_in_or_equal($courseids);
$dbcourses = $DB->get_records_select('course', 'id ' . $where, $params, '', 'id, category, shortname, fullname');
foreach ($dbcourses as $dbcourse) {
$course = new stdClass();
$course->id = $dbcourse->id;
$course->timemodified = time();
$course->category = $category->id;
$course->sortorder = $category->sortorder + MAX_COURSES_IN_CATEGORY - $i++;
if ($category->visible == 0) {
// Hide the course when moving into hidden category, do not update the visibleold flag - we want to get
// to previous state if somebody unhides the category.
$course->visible = 0;
}
$DB->update_record('course', $course);
// Update context, so it can be passed to event.
$context = context_course::instance($course->id);
$context->update_moved($newparent);
// Trigger a course updated event.
$event = \core\event\course_updated::create(array(
'objectid' => $course->id,
'context' => context_course::instance($course->id),
'other' => array('shortname' => $dbcourse->shortname,
'fullname' => $dbcourse->fullname,
'updatedfields' => array('category' => $category->id))
));
$event->set_legacy_logdata(array($course->id, 'course', 'move', 'edit.php?id=' . $course->id, $course->id));
$event->trigger();
}
fix_course_sortorder();
cache_helper::purge_by_event('changesincourse');
return true;
}
/**
* Returns the display name of the given section that the course prefers
*
* Implementation of this function is provided by course format
* @see format_base::get_section_name()
*
* @param int|stdClass $courseorid The course to get the section name for (object or just course id)
* @param int|stdClass $section Section object from database or just field course_sections.section
* @return string Display name that the course format prefers, e.g. "Week 2"
*/
function get_section_name($courseorid, $section) {
return course_get_format($courseorid)->get_section_name($section);
}
/**
* Tells if current course format uses sections
*
* @param string $format Course format ID e.g. 'weeks' $course->format
* @return bool
*/
function course_format_uses_sections($format) {
$course = new stdClass();
$course->format = $format;
return course_get_format($course)->uses_sections();
}
/**
* Returns the information about the ajax support in the given source format
*
* The returned object's property (boolean)capable indicates that
* the course format supports Moodle course ajax features.
*
* @param string $format
* @return stdClass
*/
function course_format_ajax_support($format) {
$course = new stdClass();
$course->format = $format;
return course_get_format($course)->supports_ajax();
}
/**
* Can the current user delete this course?
* Course creators have exception,
* 1 day after the creation they can sill delete the course.
* @param int $courseid
* @return boolean
*/
function can_delete_course($courseid) {
global $USER;
$context = context_course::instance($courseid);
if (has_capability('moodle/course:delete', $context)) {
return true;
}
// hack: now try to find out if creator created this course recently (1 day)
if (!has_capability('moodle/course:create', $context)) {
return false;
}
$since = time() - 60*60*24;
$course = get_course($courseid);
if ($course->timecreated < $since) {
return false; // Return if the course was not created in last 24 hours.
}
$logmanger = get_log_manager();
$readers = $logmanger->get_readers('\core\log\sql_reader');
$reader = reset($readers);
if (empty($reader)) {
return false; // No log reader found.
}
// A proper reader.
$select = "userid = :userid AND courseid = :courseid AND eventname = :eventname AND timecreated > :since";
$params = array('userid' => $USER->id, 'since' => $since, 'courseid' => $course->id, 'eventname' => '\core\event\course_created');
return (bool)$reader->get_events_select_count($select, $params);
}
/**
* Save the Your name for 'Some role' strings.
*
* @param integer $courseid the id of this course.
* @param array $data the data that came from the course settings form.
*/
function save_local_role_names($courseid, $data) {
global $DB;
$context = context_course::instance($courseid);
foreach ($data as $fieldname => $value) {
if (strpos($fieldname, 'role_') !== 0) {
continue;
}
list($ignored, $roleid) = explode('_', $fieldname);
// make up our mind whether we want to delete, update or insert
if (!$value) {
$DB->delete_records('role_names', array('contextid' => $context->id, 'roleid' => $roleid));
} else if ($rolename = $DB->get_record('role_names', array('contextid' => $context->id, 'roleid' => $roleid))) {
$rolename->name = $value;
$DB->update_record('role_names', $rolename);
} else {
$rolename = new stdClass;
$rolename->contextid = $context->id;
$rolename->roleid = $roleid;
$rolename->name = $value;
$DB->insert_record('role_names', $rolename);
}
// This will ensure the course contacts cache is purged..
core_course_category::role_assignment_changed($roleid, $context);
}
}
/**
* Returns options to use in course overviewfiles filemanager
*
* @param null|stdClass|core_course_list_element|int $course either object that has 'id' property or just the course id;
* may be empty if course does not exist yet (course create form)
* @return array|null array of options such as maxfiles, maxbytes, accepted_types, etc.
* or null if overviewfiles are disabled
*/
function course_overviewfiles_options($course) {
global $CFG;
if (empty($CFG->courseoverviewfileslimit)) {
return null;
}
$accepted_types = preg_split('/\s*,\s*/', trim($CFG->courseoverviewfilesext), -1, PREG_SPLIT_NO_EMPTY);
if (in_array('*', $accepted_types) || empty($accepted_types)) {
$accepted_types = '*';
} else {
// Since config for $CFG->courseoverviewfilesext is a text box, human factor must be considered.
// Make sure extensions are prefixed with dot unless they are valid typegroups
foreach ($accepted_types as $i => $type) {
if (substr($type, 0, 1) !== '.') {
require_once($CFG->libdir. '/filelib.php');
if (!count(file_get_typegroup('extension', $type))) {
// It does not start with dot and is not a valid typegroup, this is most likely extension.
$accepted_types[$i] = '.'. $type;
$corrected = true;
}
}
}
if (!empty($corrected)) {
set_config('courseoverviewfilesext', join(',', $accepted_types));
}
}
$options = array(
'maxfiles' => $CFG->courseoverviewfileslimit,
'maxbytes' => $CFG->maxbytes,
'subdirs' => 0,
'accepted_types' => $accepted_types
);
if (!empty($course->id)) {
$options['context'] = context_course::instance($course->id);
} else if (is_int($course) && $course > 0) {
$options['context'] = context_course::instance($course);
}
return $options;
}
/**
* Create a course and either return a $course object
*
* Please note this functions does not verify any access control,
* the calling code is responsible for all validation (usually it is the form definition).
*
* @param array $editoroptions course description editor options
* @param object $data - all the data needed for an entry in the 'course' table
* @return object new course instance
*/
function create_course($data, $editoroptions = NULL) {
global $DB, $CFG;
//check the categoryid - must be given for all new courses
$category = $DB->get_record('course_categories', array('id'=>$data->category), '*', MUST_EXIST);
// Check if the shortname already exists.
if (!empty($data->shortname)) {
if ($DB->record_exists('course', array('shortname' => $data->shortname))) {
throw new moodle_exception('shortnametaken', '', '', $data->shortname);
}
}
// Check if the idnumber already exists.
if (!empty($data->idnumber)) {
if ($DB->record_exists('course', array('idnumber' => $data->idnumber))) {
throw new moodle_exception('courseidnumbertaken', '', '', $data->idnumber);
}
}
if (empty($CFG->enablecourserelativedates)) {
// Make sure we're not setting the relative dates mode when the setting is disabled.
unset($data->relativedatesmode);
}
if ($errorcode = course_validate_dates((array)$data)) {
throw new moodle_exception($errorcode);
}
// Check if timecreated is given.
$data->timecreated = !empty($data->timecreated) ? $data->timecreated : time();
$data->timemodified = $data->timecreated;
// place at beginning of any category
$data->sortorder = 0;
if ($editoroptions) {
// summary text is updated later, we need context to store the files first
$data->summary = '';
$data->summary_format = FORMAT_HTML;
}
if (!isset($data->visible)) {
// data not from form, add missing visibility info
$data->visible = $category->visible;
}
$data->visibleold = $data->visible;
$newcourseid = $DB->insert_record('course', $data);
$context = context_course::instance($newcourseid, MUST_EXIST);
if ($editoroptions) {
// Save the files used in the summary editor and store
$data = file_postupdate_standard_editor($data, 'summary', $editoroptions, $context, 'course', 'summary', 0);
$DB->set_field('course', 'summary', $data->summary, array('id'=>$newcourseid));
$DB->set_field('course', 'summaryformat', $data->summary_format, array('id'=>$newcourseid));
}
if ($overviewfilesoptions = course_overviewfiles_options($newcourseid)) {
// Save the course overviewfiles
$data = file_postupdate_standard_filemanager($data, 'overviewfiles', $overviewfilesoptions, $context, 'course', 'overviewfiles', 0);
}
// update course format options
course_get_format($newcourseid)->update_course_format_options($data);
$course = course_get_format($newcourseid)->get_course();
fix_course_sortorder();
// purge appropriate caches in case fix_course_sortorder() did not change anything
cache_helper::purge_by_event('changesincourse');
// Trigger a course created event.
$event = \core\event\course_created::create(array(
'objectid' => $course->id,
'context' => context_course::instance($course->id),
'other' => array('shortname' => $course->shortname,
'fullname' => $course->fullname)
));
$event->trigger();
// Setup the blocks
blocks_add_default_course_blocks($course);
// Create default section and initial sections if specified (unless they've already been created earlier).
// We do not want to call course_create_sections_if_missing() because to avoid creating course cache.
$numsections = isset($data->numsections) ? $data->numsections : 0;
$existingsections = $DB->get_fieldset_sql('SELECT section from {course_sections} WHERE course = ?', [$newcourseid]);
$newsections = array_diff(range(0, $numsections), $existingsections);
foreach ($newsections as $sectionnum) {
course_create_section($newcourseid, $sectionnum, true);
}
// Save any custom role names.
save_local_role_names($course->id, (array)$data);
// set up enrolments
enrol_course_updated(true, $course, $data);
// Update course tags.
if (isset($data->tags)) {
core_tag_tag::set_item_tags('core', 'course', $course->id, context_course::instance($course->id), $data->tags);
}
// Save custom fields if there are any of them in the form.
$handler = core_course\customfield\course_handler::create();
// Make sure to set the handler's parent context first.
$coursecatcontext = context_coursecat::instance($category->id);
$handler->set_parent_context($coursecatcontext);
// Save the custom field data.
$data->id = $course->id;
$handler->instance_form_save($data, true);
return $course;
}
/**
* Update a course.
*
* Please note this functions does not verify any access control,
* the calling code is responsible for all validation (usually it is the form definition).
*
* @param object $data - all the data needed for an entry in the 'course' table
* @param array $editoroptions course description editor options
* @return void
*/
function update_course($data, $editoroptions = NULL) {
global $DB, $CFG;
// Prevent changes on front page course.
if ($data->id == SITEID) {
throw new moodle_exception('invalidcourse', 'error');
}
$oldcourse = course_get_format($data->id)->get_course();
$context = context_course::instance($oldcourse->id);
// Make sure we're not changing whatever the course's relativedatesmode setting is.
unset($data->relativedatesmode);
// Capture the updated fields for the log data.
$updatedfields = [];
foreach (get_object_vars($oldcourse) as $field => $value) {
if ($field == 'summary_editor') {
if (($data->$field)['text'] !== $value['text']) {
// The summary might be very long, we don't wan't to fill up the log record with the full text.
$updatedfields[$field] = '(updated)';
}
} else if ($field == 'tags' && isset($data->tags)) {
// Tags might not have the same array keys, just check the values.
if (array_values($data->$field) !== array_values($value)) {
$updatedfields[$field] = $data->$field;
}
} else {
if (isset($data->$field) && $data->$field != $value) {
$updatedfields[$field] = $data->$field;
}
}
}
$data->timemodified = time();
if ($editoroptions) {
$data = file_postupdate_standard_editor($data, 'summary', $editoroptions, $context, 'course', 'summary', 0);
}
if ($overviewfilesoptions = course_overviewfiles_options($data->id)) {
$data = file_postupdate_standard_filemanager($data, 'overviewfiles', $overviewfilesoptions, $context, 'course', 'overviewfiles', 0);
}
// Check we don't have a duplicate shortname.
if (!empty($data->shortname) && $oldcourse->shortname != $data->shortname) {
if ($DB->record_exists_sql('SELECT id from {course} WHERE shortname = ? AND id <> ?', array($data->shortname, $data->id))) {
throw new moodle_exception('shortnametaken', '', '', $data->shortname);
}
}
// Check we don't have a duplicate idnumber.
if (!empty($data->idnumber) && $oldcourse->idnumber != $data->idnumber) {
if ($DB->record_exists_sql('SELECT id from {course} WHERE idnumber = ? AND id <> ?', array($data->idnumber, $data->id))) {
throw new moodle_exception('courseidnumbertaken', '', '', $data->idnumber);
}
}
if ($errorcode = course_validate_dates((array)$data)) {
throw new moodle_exception($errorcode);
}
if (!isset($data->category) or empty($data->category)) {
// prevent nulls and 0 in category field
unset($data->category);
}
$changesincoursecat = $movecat = (isset($data->category) and $oldcourse->category != $data->category);
if (!isset($data->visible)) {
// data not from form, add missing visibility info
$data->visible = $oldcourse->visible;
}
if ($data->visible != $oldcourse->visible) {
// reset the visibleold flag when manually hiding/unhiding course
$data->visibleold = $data->visible;
$changesincoursecat = true;
} else {
if ($movecat) {
$newcategory = $DB->get_record('course_categories', array('id'=>$data->category));
if (empty($newcategory->visible)) {
// make sure when moving into hidden category the course is hidden automatically
$data->visible = 0;
}
}
}
// Set newsitems to 0 if format does not support announcements.
if (isset($data->format)) {
$newcourseformat = course_get_format((object)['format' => $data->format]);
if (!$newcourseformat->supports_news()) {
$data->newsitems = 0;
}
}
// Update custom fields if there are any of them in the form.
$handler = core_course\customfield\course_handler::create();
$handler->instance_form_save($data);
// Update with the new data
$DB->update_record('course', $data);
// make sure the modinfo cache is reset
rebuild_course_cache($data->id);
// update course format options with full course data
course_get_format($data->id)->update_course_format_options($data, $oldcourse);
$course = $DB->get_record('course', array('id'=>$data->id));
if ($movecat) {
$newparent = context_coursecat::instance($course->category);
$context->update_moved($newparent);
}
$fixcoursesortorder = $movecat || (isset($data->sortorder) && ($oldcourse->sortorder != $data->sortorder));
if ($fixcoursesortorder) {
fix_course_sortorder();
}
// purge appropriate caches in case fix_course_sortorder() did not change anything
cache_helper::purge_by_event('changesincourse');
if ($changesincoursecat) {
cache_helper::purge_by_event('changesincoursecat');
}
// Test for and remove blocks which aren't appropriate anymore
blocks_remove_inappropriate($course);
// Save any custom role names.
save_local_role_names($course->id, $data);
// update enrol settings
enrol_course_updated(false, $course, $data);
// Update course tags.
if (isset($data->tags)) {
core_tag_tag::set_item_tags('core', 'course', $course->id, context_course::instance($course->id), $data->tags);
}
// Trigger a course updated event.
$event = \core\event\course_updated::create(array(
'objectid' => $course->id,
'context' => context_course::instance($course->id),
'other' => array('shortname' => $course->shortname,
'fullname' => $course->fullname,
'updatedfields' => $updatedfields)
));
$event->set_legacy_logdata(array($course->id, 'course', 'update', 'edit.php?id=' . $course->id, $course->id));
$event->trigger();
if ($oldcourse->format !== $course->format) {
// Remove all options stored for the previous format
// We assume that new course format migrated everything it needed watching trigger
// 'course_updated' and in method format_XXX::update_course_format_options()
$DB->delete_records('course_format_options',
array('courseid' => $course->id, 'format' => $oldcourse->format));
}
}
/**
* Average number of participants
* @return integer
*/
function average_number_of_participants() {
global $DB, $SITE;
//count total of enrolments for visible course (except front page)
$sql = 'SELECT COUNT(*) FROM (
SELECT DISTINCT ue.userid, e.courseid
FROM {user_enrolments} ue, {enrol} e, {course} c
WHERE ue.enrolid = e.id
AND e.courseid <> :siteid
AND c.id = e.courseid
AND c.visible = 1) total';
$params = array('siteid' => $SITE->id);
$enrolmenttotal = $DB->count_records_sql($sql, $params);
//count total of visible courses (minus front page)
$coursetotal = $DB->count_records('course', array('visible' => 1));
$coursetotal = $coursetotal - 1 ;
//average of enrolment
if (empty($coursetotal)) {
$participantaverage = 0;
} else {
$participantaverage = $enrolmenttotal / $coursetotal;
}
return $participantaverage;
}
/**
* Average number of course modules
* @return integer
*/
function average_number_of_courses_modules() {
global $DB, $SITE;
//count total of visible course module (except front page)
$sql = 'SELECT COUNT(*) FROM (
SELECT cm.course, cm.module
FROM {course} c, {course_modules} cm
WHERE c.id = cm.course
AND c.id <> :siteid
AND cm.visible = 1
AND c.visible = 1) total';
$params = array('siteid' => $SITE->id);
$moduletotal = $DB->count_records_sql($sql, $params);
//count total of visible courses (minus front page)
$coursetotal = $DB->count_records('course', array('visible' => 1));
$coursetotal = $coursetotal - 1 ;
//average of course module
if (empty($coursetotal)) {
$coursemoduleaverage = 0;
} else {
$coursemoduleaverage = $moduletotal / $coursetotal;
}
return $coursemoduleaverage;
}
/**
* This class pertains to course requests and contains methods associated with
* create, approving, and removing course requests.
*
* Please note we do not allow embedded images here because there is no context
* to store them with proper access control.
*
* @copyright 2009 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.0
*
* @property-read int $id
* @property-read string $fullname
* @property-read string $shortname
* @property-read string $summary
* @property-read int $summaryformat
* @property-read int $summarytrust
* @property-read string $reason
* @property-read int $requester
*/
class course_request {
/**
* This is the stdClass that stores the properties for the course request
* and is externally accessed through the __get magic method
* @var stdClass
*/
protected $properties;
/**
* An array of options for the summary editor used by course request forms.
* This is initially set by {@link summary_editor_options()}
* @var array
* @static
*/
protected static $summaryeditoroptions;
/**
* Static function to prepare the summary editor for working with a course
* request.
*
* @static
* @param null|stdClass $data Optional, an object containing the default values
* for the form, these may be modified when preparing the
* editor so this should be called before creating the form
* @return stdClass An object that can be used to set the default values for
* an mforms form
*/
public static function prepare($data=null) {
if ($data === null) {
$data = new stdClass;
}
$data = file_prepare_standard_editor($data, 'summary', self::summary_editor_options());
return $data;
}
/**
* Static function to create a new course request when passed an array of properties
* for it.
*
* This function also handles saving any files that may have been used in the editor
*
* @static
* @param stdClass $data
* @return course_request The newly created course request
*/
public static function create($data) {
global $USER, $DB, $CFG;
$data->requester = $USER->id;
// Setting the default category if none set.
if (empty($data->category) || !empty($CFG->lockrequestcategory)) {
$data->category = $CFG->defaultrequestcategory;
}
// Summary is a required field so copy the text over
$data->summary = $data->summary_editor['text'];
$data->summaryformat = $data->summary_editor['format'];
$data->id = $DB->insert_record('course_request', $data);
// Create a new course_request object and return it
$request = new course_request($data);
// Notify the admin if required.
if ($users = get_users_from_config($CFG->courserequestnotify, 'moodle/site:approvecourse')) {
$a = new stdClass;
$a->link = "$CFG->wwwroot/course/pending.php";
$a->user = fullname($USER);
$subject = get_string('courserequest');
$message = get_string('courserequestnotifyemail', 'admin', $a);
foreach ($users as $user) {
$request->notify($user, $USER, 'courserequested', $subject, $message);
}
}
return $request;
}
/**
* Returns an array of options to use with a summary editor
*
* @uses course_request::$summaryeditoroptions
* @return array An array of options to use with the editor
*/
public static function summary_editor_options() {
global $CFG;
if (self::$summaryeditoroptions === null) {
self::$summaryeditoroptions = array('maxfiles' => 0, 'maxbytes'=>0);
}
return self::$summaryeditoroptions;
}
/**
* Loads the properties for this course request object. Id is required and if
* only id is provided then we load the rest of the properties from the database
*
* @param stdClass|int $properties Either an object containing properties
* or the course_request id to load
*/
public function __construct($properties) {
global $DB;
if (empty($properties->id)) {
if (empty($properties)) {
throw new coding_exception('You must provide a course request id when creating a course_request object');
}
$id = $properties;
$properties = new stdClass;
$properties->id = (int)$id;
unset($id);
}
if (empty($properties->requester)) {
if (!($this->properties = $DB->get_record('course_request', array('id' => $properties->id)))) {
print_error('unknowncourserequest');
}
} else {
$this->properties = $properties;
}
$this->properties->collision = null;
}
/**
* Returns the requested property
*
* @param string $key
* @return mixed
*/
public function __get($key) {
return $this->properties->$key;
}
/**
* Override this to ensure empty($request->blah) calls return a reliable answer...
*
* This is required because we define the __get method
*
* @param mixed $key
* @return bool True is it not empty, false otherwise
*/
public function __isset($key) {
return (!empty($this->properties->$key));
}
/**
* Returns the user who requested this course
*
* Uses a static var to cache the results and cut down the number of db queries
*
* @staticvar array $requesters An array of cached users
* @return stdClass The user who requested the course
*/
public function get_requester() {
global $DB;
static $requesters= array();
if (!array_key_exists($this->properties->requester, $requesters)) {
$requesters[$this->properties->requester] = $DB->get_record('user', array('id'=>$this->properties->requester));
}
return $requesters[$this->properties->requester];
}
/**
* Checks that the shortname used by the course does not conflict with any other
* courses that exist
*
* @param string|null $shortnamemark The string to append to the requests shortname
* should a conflict be found
* @return bool true is there is a conflict, false otherwise
*/
public function check_shortname_collision($shortnamemark = '[*]') {
global $DB;
if ($this->properties->collision !== null) {
return $this->properties->collision;
}
if (empty($this->properties->shortname)) {
debugging('Attempting to check a course request shortname before it has been set', DEBUG_DEVELOPER);
$this->properties->collision = false;
} else if ($DB->record_exists('course', array('shortname' => $this->properties->shortname))) {
if (!empty($shortnamemark)) {
$this->properties->shortname .= ' '.$shortnamemark;
}
$this->properties->collision = true;
} else {
$this->properties->collision = false;
}
return $this->properties->collision;
}
/**
* Checks user capability to approve a requested course
*
* If course was requested without category for some reason (might happen if $CFG->defaultrequestcategory is
* misconfigured), we check capabilities 'moodle/site:approvecourse' and 'moodle/course:changecategory'.
*
* @return bool
*/
public function can_approve() {
global $CFG;
$category = null;
if ($this->properties->category) {
$category = core_course_category::get($this->properties->category, IGNORE_MISSING);
} else if ($CFG->defaultrequestcategory) {
$category = core_course_category::get($CFG->defaultrequestcategory, IGNORE_MISSING);
}
if ($category) {
return has_capability('moodle/site:approvecourse', $category->get_context());
}
// We can not determine the context where the course should be created. The approver should have
// both capabilities to approve courses and change course category in the system context.
return has_all_capabilities(['moodle/site:approvecourse', 'moodle/course:changecategory'], context_system::instance());
}
/**
* Returns the category where this course request should be created
*
* Note that we don't check here that user has a capability to view
* hidden categories if he has capabilities 'moodle/site:approvecourse' and
* 'moodle/course:changecategory'
*
* @return core_course_category
*/
public function get_category() {
global $CFG;
if ($this->properties->category && ($category = core_course_category::get($this->properties->category, IGNORE_MISSING))) {
return $category;
} else if ($CFG->defaultrequestcategory &&
($category = core_course_category::get($CFG->defaultrequestcategory, IGNORE_MISSING))) {
return $category;
} else {
return core_course_category::get_default();
}
}
/**
* This function approves the request turning it into a course
*
* This function converts the course request into a course, at the same time
* transferring any files used in the summary to the new course and then removing
* the course request and the files associated with it.
*
* @return int The id of the course that was created from this request
*/
public function approve() {
global $CFG, $DB, $USER;
require_once($CFG->dirroot . '/backup/util/includes/restore_includes.php');
$user = $DB->get_record('user', array('id' => $this->properties->requester, 'deleted'=>0), '*', MUST_EXIST);
$courseconfig = get_config('moodlecourse');
// Transfer appropriate settings
$data = clone($this->properties);
unset($data->id);
unset($data->reason);
unset($data->requester);
// Set category
$category = $this->get_category();
$data->category = $category->id;
// Set misc settings
$data->requested = 1;
// Apply course default settings
$data->format = $courseconfig->format;
$data->newsitems = $courseconfig->newsitems;
$data->showgrades = $courseconfig->showgrades;
$data->showreports = $courseconfig->showreports;
$data->maxbytes = $courseconfig->maxbytes;
$data->groupmode = $courseconfig->groupmode;
$data->groupmodeforce = $courseconfig->groupmodeforce;
$data->visible = $courseconfig->visible;
$data->visibleold = $data->visible;
$data->lang = $courseconfig->lang;
$data->enablecompletion = $courseconfig->enablecompletion;
$data->numsections = $courseconfig->numsections;
$data->startdate = usergetmidnight(time());
if ($courseconfig->courseenddateenabled) {
$data->enddate = usergetmidnight(time()) + $courseconfig->courseduration;
}
list($data->fullname, $data->shortname) = restore_dbops::calculate_course_names(0, $data->fullname, $data->shortname);
$course = create_course($data);
$context = context_course::instance($course->id, MUST_EXIST);
// add enrol instances
if (!$DB->record_exists('enrol', array('courseid'=>$course->id, 'enrol'=>'manual'))) {
if ($manual = enrol_get_plugin('manual')) {
$manual->add_default_instance($course);
}
}
// enrol the requester as teacher if necessary
if (!empty($CFG->creatornewroleid) and !is_viewing($context, $user, 'moodle/role:assign') and !is_enrolled($context, $user, 'moodle/role:assign')) {
enrol_try_internal_enrol($course->id, $user->id, $CFG->creatornewroleid);
}
$this->delete();
$a = new stdClass();
$a->name = format_string($course->fullname, true, array('context' => context_course::instance($course->id)));
$a->url = $CFG->wwwroot.'/course/view.php?id=' . $course->id;
$this->notify($user, $USER, 'courserequestapproved', get_string('courseapprovedsubject'), get_string('courseapprovedemail2', 'moodle', $a), $course->id);
return $course->id;
}
/**
* Reject a course request
*
* This function rejects a course request, emailing the requesting user the
* provided notice and then removing the request from the database
*
* @param string $notice The message to display to the user
*/
public function reject($notice) {
global $USER, $DB;
$user = $DB->get_record('user', array('id' => $this->properties->requester), '*', MUST_EXIST);
$this->notify($user, $USER, 'courserequestrejected', get_string('courserejectsubject'), get_string('courserejectemail', 'moodle', $notice));
$this->delete();
}
/**
* Deletes the course request and any associated files
*/
public function delete() {
global $DB;
$DB->delete_records('course_request', array('id' => $this->properties->id));
}
/**
* Send a message from one user to another using events_trigger
*
* @param object $touser
* @param object $fromuser
* @param string $name
* @param string $subject
* @param string $message
* @param int|null $courseid
*/
protected function notify($touser, $fromuser, $name='courserequested', $subject, $message, $courseid = null) {
$eventdata = new \core\message\message();
$eventdata->courseid = empty($courseid) ? SITEID : $courseid;
$eventdata->component = 'moodle';
$eventdata->name = $name;
$eventdata->userfrom = $fromuser;
$eventdata->userto = $touser;
$eventdata->subject = $subject;
$eventdata->fullmessage = $message;
$eventdata->fullmessageformat = FORMAT_PLAIN;
$eventdata->fullmessagehtml = '';
$eventdata->smallmessage = '';
$eventdata->notification = 1;
message_send($eventdata);
}
/**
* Checks if current user can request a course in this context
*
* @param context $context
* @return bool
*/
public static function can_request(context $context) {
global $CFG;
if (empty($CFG->enablecourserequests)) {
return false;
}
if (has_capability('moodle/course:create', $context)) {
return false;
}
if ($context instanceof context_system) {
$defaultcontext = context_coursecat::instance($CFG->defaultrequestcategory, IGNORE_MISSING);
return $defaultcontext &&
has_capability('moodle/course:request', $defaultcontext);
} else if ($context instanceof context_coursecat) {
if (!$CFG->lockrequestcategory || $CFG->defaultrequestcategory == $context->instanceid) {
return has_capability('moodle/course:request', $context);
}
}
return false;
}
}
/**
* Return a list of page types
* @param string $pagetype current page type
* @param context $parentcontext Block's parent context
* @param context $currentcontext Current context of block
* @return array array of page types
*/
function course_page_type_list($pagetype, $parentcontext, $currentcontext) {
if ($pagetype === 'course-index' || $pagetype === 'course-index-category') {
// For courses and categories browsing pages (/course/index.php) add option to show on ANY category page
$pagetypes = array('*' => get_string('page-x', 'pagetype'),
'course-index-*' => get_string('page-course-index-x', 'pagetype'),
);
} else if ($currentcontext && (!($coursecontext = $currentcontext->get_course_context(false)) || $coursecontext->instanceid == SITEID)) {
// We know for sure that despite pagetype starts with 'course-' this is not a page in course context (i.e. /course/search.php, etc.)
$pagetypes = array('*' => get_string('page-x', 'pagetype'));
} else {
// Otherwise consider it a page inside a course even if $currentcontext is null
$pagetypes = array('*' => get_string('page-x', 'pagetype'),
'course-*' => get_string('page-course-x', 'pagetype'),
'course-view-*' => get_string('page-course-view-x', 'pagetype')
);
}
return $pagetypes;
}
/**
* Determine whether course ajax should be enabled for the specified course
*
* @param stdClass $course The course to test against
* @return boolean Whether course ajax is enabled or note
*/
function course_ajax_enabled($course) {
global $CFG, $PAGE, $SITE;
// The user must be editing for AJAX to be included
if (!$PAGE->user_is_editing()) {
return false;
}
// Check that the theme suports
if (!$PAGE->theme->enablecourseajax) {
return false;
}
// Check that the course format supports ajax functionality
// The site 'format' doesn't have information on course format support
if ($SITE->id !== $course->id) {
$courseformatajaxsupport = course_format_ajax_support($course->format);
if (!$courseformatajaxsupport->capable) {
return false;
}
}
// All conditions have been met so course ajax should be enabled
return true;
}
/**
* Include the relevant javascript and language strings for the resource
* toolbox YUI module
*
* @param integer $id The ID of the course being applied to
* @param array $usedmodules An array containing the names of the modules in use on the page
* @param array $enabledmodules An array containing the names of the enabled (visible) modules on this site
* @param stdClass $config An object containing configuration parameters for ajax modules including:
* * resourceurl The URL to post changes to for resource changes
* * sectionurl The URL to post changes to for section changes
* * pageparams Additional parameters to pass through in the post
* @return bool
*/
function include_course_ajax($course, $usedmodules = array(), $enabledmodules = null, $config = null) {
global $CFG, $PAGE, $SITE;
// Ensure that ajax should be included
if (!course_ajax_enabled($course)) {
return false;
}
if (!$config) {
$config = new stdClass();
}
// The URL to use for resource changes
if (!isset($config->resourceurl)) {
$config->resourceurl = '/course/rest.php';
}
// The URL to use for section changes
if (!isset($config->sectionurl)) {
$config->sectionurl = '/course/rest.php';
}
// Any additional parameters which need to be included on page submission
if (!isset($config->pageparams)) {
$config->pageparams = array();
}
// Include course dragdrop
if (course_format_uses_sections($course->format)) {
$PAGE->requires->yui_module('moodle-course-dragdrop', 'M.course.init_section_dragdrop',
array(array(
'courseid' => $course->id,
'ajaxurl' => $config->sectionurl,
'config' => $config,
)), null, true);
$PAGE->requires->yui_module('moodle-course-dragdrop', 'M.course.init_resource_dragdrop',
array(array(
'courseid' => $course->id,
'ajaxurl' => $config->resourceurl,
'config' => $config,
)), null, true);
}
// Require various strings for the command toolbox
$PAGE->requires->strings_for_js(array(
'moveleft',
'deletechecktype',
'deletechecktypename',
'edittitle',
'edittitleinstructions',
'show',
'hide',
'highlight',
'highlightoff',
'groupsnone',
'groupsvisible',
'groupsseparate',
'clicktochangeinbrackets',
'markthistopic',
'markedthistopic',
'movesection',
'movecoursemodule',
'movecoursesection',
'movecontent',
'tocontent',
'emptydragdropregion',
'afterresource',
'aftersection',
'totopofsection',
), 'moodle');
// Include section-specific strings for formats which support sections.
if (course_format_uses_sections($course->format)) {
$PAGE->requires->strings_for_js(array(
'showfromothers',
'hidefromothers',
), 'format_' . $course->format);
}
// For confirming resource deletion we need the name of the module in question
foreach ($usedmodules as $module => $modname) {
$PAGE->requires->string_for_js('pluginname', $module);
}
// Load drag and drop upload AJAX.
require_once($CFG->dirroot.'/course/dnduploadlib.php');
dndupload_add_to_course($course, $enabledmodules);
$PAGE->requires->js_call_amd('core_course/actions', 'initCoursePage', array($course->format));
return true;
}
/**
* Returns the sorted list of available course formats, filtered by enabled if necessary
*
* @param bool $enabledonly return only formats that are enabled
* @return array array of sorted format names
*/
function get_sorted_course_formats($enabledonly = false) {
global $CFG;
$formats = core_component::get_plugin_list('format');
if (!empty($CFG->format_plugins_sortorder)) {
$order = explode(',', $CFG->format_plugins_sortorder);
$order = array_merge(array_intersect($order, array_keys($formats)),
array_diff(array_keys($formats), $order));
} else {
$order = array_keys($formats);
}
if (!$enabledonly) {
return $order;
}
$sortedformats = array();
foreach ($order as $formatname) {
if (!get_config('format_'.$formatname, 'disabled')) {
$sortedformats[] = $formatname;
}
}
return $sortedformats;
}
/**
* The URL to use for the specified course (with section)
*
* @param int|stdClass $courseorid The course to get the section name for (either object or just course id)
* @param int|stdClass $section Section object from database or just field course_sections.section
* if omitted the course view page is returned
* @param array $options options for view URL. At the moment core uses:
* 'navigation' (bool) if true and section has no separate page, the function returns null
* 'sr' (int) used by multipage formats to specify to which section to return
* @return moodle_url The url of course
*/
function course_get_url($courseorid, $section = null, $options = array()) {
return course_get_format($courseorid)->get_view_url($section, $options);
}
/**
* Create a module.
*
* It includes:
* - capability checks and other checks
* - create the module from the module info
*
* @param object $module
* @return object the created module info
* @throws moodle_exception if user is not allowed to perform the action or module is not allowed in this course
*/
function create_module($moduleinfo) {
global $DB, $CFG;
require_once($CFG->dirroot . '/course/modlib.php');
// Check manadatory attributs.
$mandatoryfields = array('modulename', 'course', 'section', 'visible');
if (plugin_supports('mod', $moduleinfo->modulename, FEATURE_MOD_INTRO, true)) {
$mandatoryfields[] = 'introeditor';
}
foreach($mandatoryfields as $mandatoryfield) {
if (!isset($moduleinfo->{$mandatoryfield})) {
throw new moodle_exception('createmodulemissingattribut', '', '', $mandatoryfield);
}
}
// Some additional checks (capability / existing instances).
$course = $DB->get_record('course', array('id'=>$moduleinfo->course), '*', MUST_EXIST);
list($module, $context, $cw) = can_add_moduleinfo($course, $moduleinfo->modulename, $moduleinfo->section);
// Add the module.
$moduleinfo->module = $module->id;
$moduleinfo = add_moduleinfo($moduleinfo, $course, null);
return $moduleinfo;
}
/**
* Update a module.
*
* It includes:
* - capability and other checks
* - update the module
*
* @param object $module
* @return object the updated module info
* @throws moodle_exception if current user is not allowed to update the module
*/
function update_module($moduleinfo) {
global $DB, $CFG;
require_once($CFG->dirroot . '/course/modlib.php');
// Check the course module exists.
$cm = get_coursemodule_from_id('', $moduleinfo->coursemodule, 0, false, MUST_EXIST);
// Check the course exists.
$course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
// Some checks (capaibility / existing instances).
list($cm, $context, $module, $data, $cw) = can_update_moduleinfo($cm);
// Retrieve few information needed by update_moduleinfo.
$moduleinfo->modulename = $cm->modname;
if (!isset($moduleinfo->scale)) {
$moduleinfo->scale = 0;
}
$moduleinfo->type = 'mod';
// Update the module.
list($cm, $moduleinfo) = update_moduleinfo($cm, $moduleinfo, $course, null);
return $moduleinfo;
}
/**
* Duplicate a module on the course for ajax.
*
* @see mod_duplicate_module()
* @param object $course The course
* @param object $cm The course module to duplicate
* @param int $sr The section to link back to (used for creating the links)
* @throws moodle_exception if the plugin doesn't support duplication
* @return Object containing:
* - fullcontent: The HTML markup for the created CM
* - cmid: The CMID of the newly created CM
* - redirect: Whether to trigger a redirect following this change
*/
function mod_duplicate_activity($course, $cm, $sr = null) {
global $PAGE;
$newcm = duplicate_module($course, $cm);
$resp = new stdClass();
if ($newcm) {
$courserenderer = $PAGE->get_renderer('core', 'course');
$completioninfo = new completion_info($course);
$modulehtml = $courserenderer->course_section_cm($course, $completioninfo,
$newcm, null, array());
$resp->fullcontent = $courserenderer->course_section_cm_list_item($course, $completioninfo, $newcm, $sr);
$resp->cmid = $newcm->id;
} else {
// Trigger a redirect.
$resp->redirect = true;
}
return $resp;
}
/**
* Api to duplicate a module.
*
* @param object $course course object.
* @param object $cm course module object to be duplicated.
* @since Moodle 2.8
*
* @throws Exception
* @throws coding_exception
* @throws moodle_exception
* @throws restore_controller_exception
*
* @return cm_info|null cminfo object if we sucessfully duplicated the mod and found the new cm.
*/
function duplicate_module($course, $cm) {
global $CFG, $DB, $USER;
require_once($CFG->dirroot . '/backup/util/includes/backup_includes.php');
require_once($CFG->dirroot . '/backup/util/includes/restore_includes.php');
require_once($CFG->libdir . '/filelib.php');
$a = new stdClass();
$a->modtype = get_string('modulename', $cm->modname);
$a->modname = format_string($cm->name);
if (!plugin_supports('mod', $cm->modname, FEATURE_BACKUP_MOODLE2)) {
throw new moodle_exception('duplicatenosupport', 'error', '', $a);
}
// Backup the activity.
$bc = new backup_controller(backup::TYPE_1ACTIVITY, $cm->id, backup::FORMAT_MOODLE,
backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id);
$backupid = $bc->get_backupid();
$backupbasepath = $bc->get_plan()->get_basepath();
$bc->execute_plan();
$bc->destroy();
// Restore the backup immediately.
$rc = new restore_controller($backupid, $course->id,
backup::INTERACTIVE_NO, backup::MODE_IMPORT, $USER->id, backup::TARGET_CURRENT_ADDING);
// Make sure that the restore_general_groups setting is always enabled when duplicating an activity.
$plan = $rc->get_plan();
$groupsetting = $plan->get_setting('groups');
if (empty($groupsetting->get_value())) {
$groupsetting->set_value(true);
}
$cmcontext = context_module::instance($cm->id);
if (!$rc->execute_precheck()) {
$precheckresults = $rc->get_precheck_results();
if (is_array($precheckresults) && !empty($precheckresults['errors'])) {
if (empty($CFG->keeptempdirectoriesonbackup)) {
fulldelete($backupbasepath);
}
}
}
$rc->execute_plan();
// Now a bit hacky part follows - we try to get the cmid of the newly
// restored copy of the module.
$newcmid = null;
$tasks = $rc->get_plan()->get_tasks();
foreach ($tasks as $task) {
if (is_subclass_of($task, 'restore_activity_task')) {
if ($task->get_old_contextid() == $cmcontext->id) {
$newcmid = $task->get_moduleid();
break;
}
}
}
$rc->destroy();
if (empty($CFG->keeptempdirectoriesonbackup)) {
fulldelete($backupbasepath);
}
// If we know the cmid of the new course module, let us move it
// right below the original one. otherwise it will stay at the
// end of the section.
if ($newcmid) {
// Proceed with activity renaming before everything else. We don't use APIs here to avoid
// triggering a lot of create/update duplicated events.
$newcm = get_coursemodule_from_id($cm->modname, $newcmid, $cm->course);
// Add ' (copy)' to duplicates. Note we don't cleanup or validate lengths here. It comes
// from original name that was valid, so the copy should be too.
$newname = get_string('duplicatedmodule', 'moodle', $newcm->name);
$DB->set_field($cm->modname, 'name', $newname, ['id' => $newcm->instance]);
$section = $DB->get_record('course_sections', array('id' => $cm->section, 'course' => $cm->course));
$modarray = explode(",", trim($section->sequence));
$cmindex = array_search($cm->id, $modarray);
if ($cmindex !== false && $cmindex < count($modarray) - 1) {
moveto_module($newcm, $section, $modarray[$cmindex + 1]);
}
// Update calendar events with the duplicated module.
// The following line is to be removed in MDL-58906.
course_module_update_calendar_events($newcm->modname, null, $newcm);
// Trigger course module created event. We can trigger the event only if we know the newcmid.
$newcm = get_fast_modinfo($cm->course)->get_cm($newcmid);
$event = \core\event\course_module_created::create_from_cm($newcm);
$event->trigger();
}
return isset($newcm) ? $newcm : null;
}
/**
* Compare two objects to find out their correct order based on timestamp (to be used by usort).
* Sorts by descending order of time.
*
* @param stdClass $a First object
* @param stdClass $b Second object
* @return int 0,1,-1 representing the order
*/
function compare_activities_by_time_desc($a, $b) {
// Make sure the activities actually have a timestamp property.
if ((!property_exists($a, 'timestamp')) && (!property_exists($b, 'timestamp'))) {
return 0;
}
// We treat instances without timestamp as if they have a timestamp of 0.
if ((!property_exists($a, 'timestamp')) && (property_exists($b,'timestamp'))) {
return 1;
}
if ((property_exists($a, 'timestamp')) && (!property_exists($b, 'timestamp'))) {
return -1;
}
if ($a->timestamp == $b->timestamp) {
return 0;
}
return ($a->timestamp > $b->timestamp) ? -1 : 1;
}
/**
* Compare two objects to find out their correct order based on timestamp (to be used by usort).
* Sorts by ascending order of time.
*
* @param stdClass $a First object
* @param stdClass $b Second object
* @return int 0,1,-1 representing the order
*/
function compare_activities_by_time_asc($a, $b) {
// Make sure the activities actually have a timestamp property.
if ((!property_exists($a, 'timestamp')) && (!property_exists($b, 'timestamp'))) {
return 0;
}
// We treat instances without timestamp as if they have a timestamp of 0.
if ((!property_exists($a, 'timestamp')) && (property_exists($b, 'timestamp'))) {
return -1;
}
if ((property_exists($a, 'timestamp')) && (!property_exists($b, 'timestamp'))) {
return 1;
}
if ($a->timestamp == $b->timestamp) {
return 0;
}
return ($a->timestamp < $b->timestamp) ? -1 : 1;
}
/**
* Changes the visibility of a course.
*
* @param int $courseid The course to change.
* @param bool $show True to make it visible, false otherwise.
* @return bool
*/
function course_change_visibility($courseid, $show = true) {
$course = new stdClass;
$course->id = $courseid;
$course->visible = ($show) ? '1' : '0';
$course->visibleold = $course->visible;
update_course($course);
return true;
}
/**
* Changes the course sortorder by one, moving it up or down one in respect to sort order.
*
* @param stdClass|core_course_list_element $course
* @param bool $up If set to true the course will be moved up one. Otherwise down one.
* @return bool
*/
function course_change_sortorder_by_one($course, $up) {
global $DB;
$params = array($course->sortorder, $course->category);
if ($up) {
$select = 'sortorder < ? AND category = ?';
$sort = 'sortorder DESC';
} else {
$select = 'sortorder > ? AND category = ?';
$sort = 'sortorder ASC';
}
fix_course_sortorder();
$swapcourse = $DB->get_records_select('course', $select, $params, $sort, '*', 0, 1);
if ($swapcourse) {
$swapcourse = reset($swapcourse);
$DB->set_field('course', 'sortorder', $swapcourse->sortorder, array('id' => $course->id));
$DB->set_field('course', 'sortorder', $course->sortorder, array('id' => $swapcourse->id));
// Finally reorder courses.
fix_course_sortorder();
cache_helper::purge_by_event('changesincourse');
return true;
}
return false;
}
/**
* Changes the sort order of courses in a category so that the first course appears after the second.
*
* @param int|stdClass $courseorid The course to focus on.
* @param int $moveaftercourseid The course to shifter after or 0 if you want it to be the first course in the category.
* @return bool
*/
function course_change_sortorder_after_course($courseorid, $moveaftercourseid) {
global $DB;
if (!is_object($courseorid)) {
$course = get_course($courseorid);
} else {
$course = $courseorid;
}
if ((int)$moveaftercourseid === 0) {
// We've moving the course to the start of the queue.
$sql = 'SELECT sortorder
FROM {course}
WHERE category = :categoryid
ORDER BY sortorder';
$params = array(
'categoryid' => $course->category
);
$sortorder = $DB->get_field_sql($sql, $params, IGNORE_MULTIPLE);
$sql = 'UPDATE {course}
SET sortorder = sortorder + 1
WHERE category = :categoryid
AND id <> :id';
$params = array(
'categoryid' => $course->category,
'id' => $course->id,
);
$DB->execute($sql, $params);
$DB->set_field('course', 'sortorder', $sortorder, array('id' => $course->id));
} else if ($course->id === $moveaftercourseid) {
// They're the same - moronic.
debugging("Invalid move after course given.", DEBUG_DEVELOPER);
return false;
} else {
// Moving this course after the given course. It could be before it could be after.
$moveaftercourse = get_course($moveaftercourseid);
if ($course->category !== $moveaftercourse->category) {
debugging("Cannot re-order courses. The given courses do not belong to the same category.", DEBUG_DEVELOPER);
return false;
}
// Increment all courses in the same category that are ordered after the moveafter course.
// This makes a space for the course we're moving.
$sql = 'UPDATE {course}
SET sortorder = sortorder + 1
WHERE category = :categoryid
AND sortorder > :sortorder';
$params = array(
'categoryid' => $moveaftercourse->category,
'sortorder' => $moveaftercourse->sortorder
);
$DB->execute($sql, $params);
$DB->set_field('course', 'sortorder', $moveaftercourse->sortorder + 1, array('id' => $course->id));
}
fix_course_sortorder();
cache_helper::purge_by_event('changesincourse');
return true;
}
/**
* Trigger course viewed event. This API function is used when course view actions happens,
* usually in course/view.php but also in external functions.
*
* @param stdClass $context course context object
* @param int $sectionnumber section number
* @since Moodle 2.9
*/
function course_view($context, $sectionnumber = 0) {
$eventdata = array('context' => $context);
if (!empty($sectionnumber)) {
$eventdata['other']['coursesectionnumber'] = $sectionnumber;
}
$event = \core\event\course_viewed::create($eventdata);
$event->trigger();
user_accesstime_log($context->instanceid);
}
/**
* Returns courses tagged with a specified tag.
*
* @param core_tag_tag $tag
* @param bool $exclusivemode if set to true it means that no other entities tagged with this tag
* are displayed on the page and the per-page limit may be bigger
* @param int $fromctx context id where the link was displayed, may be used by callbacks
* to display items in the same context first
* @param int $ctx context id where to search for records
* @param bool $rec search in subcontexts as well
* @param int $page 0-based number of page being displayed
* @return \core_tag\output\tagindex
*/
function course_get_tagged_courses($tag, $exclusivemode = false, $fromctx = 0, $ctx = 0, $rec = 1, $page = 0) {
global $CFG, $PAGE;
$perpage = $exclusivemode ? $CFG->coursesperpage : 5;
$displayoptions = array(
'limit' => $perpage,
'offset' => $page * $perpage,
'viewmoreurl' => null,
);
$courserenderer = $PAGE->get_renderer('core', 'course');
$totalcount = core_course_category::search_courses_count(array('tagid' => $tag->id, 'ctx' => $ctx, 'rec' => $rec));
$content = $courserenderer->tagged_courses($tag->id, $exclusivemode, $ctx, $rec, $displayoptions);
$totalpages = ceil($totalcount / $perpage);
return new core_tag\output\tagindex($tag, 'core', 'course', $content,
$exclusivemode, $fromctx, $ctx, $rec, $page, $totalpages);
}
/**
* Implements callback inplace_editable() allowing to edit values in-place
*
* @param string $itemtype
* @param int $itemid
* @param mixed $newvalue
* @return \core\output\inplace_editable
*/
function core_course_inplace_editable($itemtype, $itemid, $newvalue) {
if ($itemtype === 'activityname') {
return \core_course\output\course_module_name::update($itemid, $newvalue);
}
}
/**
* This function calculates the minimum and maximum cutoff values for the timestart of
* the given event.
*
* It will return an array with two values, the first being the minimum cutoff value and
* the second being the maximum cutoff value. Either or both values can be null, which
* indicates there is no minimum or maximum, respectively.
*
* If a cutoff is required then the function must return an array containing the cutoff
* timestamp and error string to display to the user if the cutoff value is violated.
*
* A minimum and maximum cutoff return value will look like:
* [
* [1505704373, 'The date must be after this date'],
* [1506741172, 'The date must be before this date']
* ]
*
* @param calendar_event $event The calendar event to get the time range for
* @param stdClass $course The course object to get the range from
* @return array Returns an array with min and max date.
*/
function core_course_core_calendar_get_valid_event_timestart_range(\calendar_event $event, $course) {
$mindate = null;
$maxdate = null;
if ($course->startdate) {
$mindate = [
$course->startdate,
get_string('errorbeforecoursestart', 'calendar')
];
}
return [$mindate, $maxdate];
}
/**
* Returns course modules tagged with a specified tag ready for output on tag/index.php page
*
* This is a callback used by the tag area core/course_modules to search for course modules
* tagged with a specific tag.
*
* @param core_tag_tag $tag
* @param bool $exclusivemode if set to true it means that no other entities tagged with this tag
* are displayed on the page and the per-page limit may be bigger
* @param int $fromcontextid context id where the link was displayed, may be used by callbacks
* to display items in the same context first
* @param int $contextid context id where to search for records
* @param bool $recursivecontext search in subcontexts as well
* @param int $page 0-based number of page being displayed
* @return \core_tag\output\tagindex
*/
function course_get_tagged_course_modules($tag, $exclusivemode = false, $fromcontextid = 0, $contextid = 0,
$recursivecontext = 1, $page = 0) {
global $OUTPUT;
$perpage = $exclusivemode ? 20 : 5;
// Build select query.
$ctxselect = context_helper::get_preload_record_columns_sql('ctx');
$query = "SELECT cm.id AS cmid, c.id AS courseid, $ctxselect
FROM {course_modules} cm
JOIN {tag_instance} tt ON cm.id = tt.itemid
JOIN {course} c ON cm.course = c.id
JOIN {context} ctx ON ctx.instanceid = cm.id AND ctx.contextlevel = :coursemodulecontextlevel
WHERE tt.itemtype = :itemtype AND tt.tagid = :tagid AND tt.component = :component
AND cm.deletioninprogress = 0
AND c.id %COURSEFILTER% AND cm.id %ITEMFILTER%";
$params = array('itemtype' => 'course_modules', 'tagid' => $tag->id, 'component' => 'core',
'coursemodulecontextlevel' => CONTEXT_MODULE);
if ($contextid) {
$context = context::instance_by_id($contextid);
$query .= $recursivecontext ? ' AND (ctx.id = :contextid OR ctx.path LIKE :path)' : ' AND ctx.id = :contextid';
$params['contextid'] = $context->id;
$params['path'] = $context->path.'/%';
}
$query .= ' ORDER BY';
if ($fromcontextid) {
// In order-clause specify that modules from inside "fromctx" context should be returned first.
$fromcontext = context::instance_by_id($fromcontextid);
$query .= ' (CASE WHEN ctx.id = :fromcontextid OR ctx.path LIKE :frompath THEN 0 ELSE 1 END),';
$params['fromcontextid'] = $fromcontext->id;
$params['frompath'] = $fromcontext->path.'/%';
}
$query .= ' c.sortorder, cm.id';
$totalpages = $page + 1;
// Use core_tag_index_builder to build and filter the list of items.
// Request one item more than we need so we know if next page exists.
$builder = new core_tag_index_builder('core', 'course_modules', $query, $params, $page * $perpage, $perpage + 1);
while ($item = $builder->has_item_that_needs_access_check()) {
context_helper::preload_from_record($item);
$courseid = $item->courseid;
if (!$builder->can_access_course($courseid)) {
$builder->set_accessible($item, false);
continue;
}
$modinfo = get_fast_modinfo($builder->get_course($courseid));
// Set accessibility of this item and all other items in the same course.
$builder->walk(function ($taggeditem) use ($courseid, $modinfo, $builder) {
if ($taggeditem->courseid == $courseid) {
$cm = $modinfo->get_cm($taggeditem->cmid);
$builder->set_accessible($taggeditem, $cm->uservisible);
}
});
}
$items = $builder->get_items();
if (count($items) > $perpage) {
$totalpages = $page + 2; // We don't need exact page count, just indicate that the next page exists.
array_pop($items);
}
// Build the display contents.
if ($items) {
$tagfeed = new core_tag\output\tagfeed();
foreach ($items as $item) {
context_helper::preload_from_record($item);
$course = $builder->get_course($item->courseid);
$modinfo = get_fast_modinfo($course);
$cm = $modinfo->get_cm($item->cmid);
$courseurl = course_get_url($item->courseid, $cm->sectionnum);
$cmname = $cm->get_formatted_name();
if (!$exclusivemode) {
$cmname = shorten_text($cmname, 100);
}
$cmname = html_writer::link($cm->url?:$courseurl, $cmname);
$coursename = format_string($course->fullname, true,
array('context' => context_course::instance($item->courseid)));
$coursename = html_writer::link($courseurl, $coursename);
$icon = html_writer::empty_tag('img', array('src' => $cm->get_icon_url()));
$tagfeed->add($icon, $cmname, $coursename);
}
$content = $OUTPUT->render_from_template('core_tag/tagfeed',
$tagfeed->export_for_template($OUTPUT));
return new core_tag\output\tagindex($tag, 'core', 'course_modules', $content,
$exclusivemode, $fromcontextid, $contextid, $recursivecontext, $page, $totalpages);
}
}
/**
* Return an object with the list of navigation options in a course that are avaialable or not for the current user.
* This function also handles the frontpage course.
*
* @param stdClass $context context object (it can be a course context or the system context for frontpage settings)
* @param stdClass $course the course where the settings are being rendered
* @return stdClass the navigation options in a course and their availability status
* @since Moodle 3.2
*/
function course_get_user_navigation_options($context, $course = null) {
global $CFG;
$isloggedin = isloggedin();
$isguestuser = isguestuser();
$isfrontpage = $context->contextlevel == CONTEXT_SYSTEM;
if ($isfrontpage) {
$sitecontext = $context;
} else {
$sitecontext = context_system::instance();
}
// Sets defaults for all options.
$options = (object) [
'badges' => false,
'blogs' => false,
'calendar' => false,
'competencies' => false,
'grades' => false,
'notes' => false,
'participants' => false,
'search' => false,
'tags' => false,
];
$options->blogs = !empty($CFG->enableblogs) &&
($CFG->bloglevel == BLOG_GLOBAL_LEVEL ||
($CFG->bloglevel == BLOG_SITE_LEVEL and ($isloggedin and !$isguestuser)))
&& has_capability('moodle/blog:view', $sitecontext);
$options->notes = !empty($CFG->enablenotes) && has_any_capability(array('moodle/notes:manage', 'moodle/notes:view'), $context);
// Frontpage settings?
if ($isfrontpage) {
// We are on the front page, so make sure we use the proper capability (site:viewparticipants).
$options->participants = course_can_view_participants($sitecontext);
$options->badges = !empty($CFG->enablebadges) && has_capability('moodle/badges:viewbadges', $sitecontext);
$options->tags = !empty($CFG->usetags) && $isloggedin;
$options->search = !empty($CFG->enableglobalsearch) && has_capability('moodle/search:query', $sitecontext);
$options->calendar = $isloggedin;
} else {
// We are in a course, so make sure we use the proper capability (course:viewparticipants).
$options->participants = course_can_view_participants($context);
$options->badges = !empty($CFG->enablebadges) && !empty($CFG->badges_allowcoursebadges) &&
has_capability('moodle/badges:viewbadges', $context);
// Add view grade report is permitted.
$grades = false;
if (has_capability('moodle/grade:viewall', $context)) {
$grades = true;
} else if (!empty($course->showgrades)) {
$reports = core_component::get_plugin_list('gradereport');
if (is_array($reports) && count($reports) > 0) { // Get all installed reports.
arsort($reports); // User is last, we want to test it first.
foreach ($reports as $plugin => $plugindir) {
if (has_capability('gradereport/'.$plugin.':view', $context)) {
// Stop when the first visible plugin is found.
$grades = true;
break;
}
}
}
}
$options->grades = $grades;
}
if (\core_competency\api::is_enabled()) {
$capabilities = array('moodle/competency:coursecompetencyview', 'moodle/competency:coursecompetencymanage');
$options->competencies = has_any_capability($capabilities, $context);
}
return $options;
}
/**
* Return an object with the list of administration options in a course that are available or not for the current user.
* This function also handles the frontpage settings.
*
* @param stdClass $course course object (for frontpage it should be a clone of $SITE)
* @param stdClass $context context object (course context)
* @return stdClass the administration options in a course and their availability status
* @since Moodle 3.2
*/
function course_get_user_administration_options($course, $context) {
global $CFG;
$isfrontpage = $course->id == SITEID;
$completionenabled = $CFG->enablecompletion && $course->enablecompletion;
$hascompletiontabs = count(core_completion\manager::get_available_completion_tabs($course, $context)) > 0;
$options = new stdClass;
$options->update = has_capability('moodle/course:update', $context);
$options->editcompletion = $CFG->enablecompletion &&
$course->enablecompletion &&
($options->update || $hascompletiontabs);
$options->filters = has_capability('moodle/filter:manage', $context) &&
count(filter_get_available_in_context($context)) > 0;
$options->reports = has_capability('moodle/site:viewreports', $context);
$options->backup = has_capability('moodle/backup:backupcourse', $context);
$options->restore = has_capability('moodle/restore:restorecourse', $context);
$options->files = ($course->legacyfiles == 2 && has_capability('moodle/course:managefiles', $context));
if (!$isfrontpage) {
$options->tags = has_capability('moodle/course:tag', $context);
$options->gradebook = has_capability('moodle/grade:manage', $context);
$options->outcomes = !empty($CFG->enableoutcomes) && has_capability('moodle/course:update', $context);
$options->badges = !empty($CFG->enablebadges);
$options->import = has_capability('moodle/restore:restoretargetimport', $context);
$options->reset = has_capability('moodle/course:reset', $context);
$options->roles = has_capability('moodle/role:switchroles', $context);
} else {
// Set default options to false.
$listofoptions = array('tags', 'gradebook', 'outcomes', 'badges', 'import', 'publish', 'reset', 'roles', 'grades');
foreach ($listofoptions as $option) {
$options->$option = false;
}
}
return $options;
}
/**
* Validates course start and end dates.
*
* Checks that the end course date is not greater than the start course date.
*
* $coursedata['startdate'] or $coursedata['enddate'] may not be set, it depends on the form and user input.
*
* @param array $coursedata May contain startdate and enddate timestamps, depends on the user input.
* @return mixed False if everything alright, error codes otherwise.
*/
function course_validate_dates($coursedata) {
// If both start and end dates are set end date should be later than the start date.
if (!empty($coursedata['startdate']) && !empty($coursedata['enddate']) &&
($coursedata['enddate'] < $coursedata['startdate'])) {
return 'enddatebeforestartdate';
}
// If start date is not set end date can not be set.
if (empty($coursedata['startdate']) && !empty($coursedata['enddate'])) {
return 'nostartdatenoenddate';
}
return false;
}
/**
* Check for course updates in the given context level instances (only modules supported right Now)
*
* @param stdClass $course course object
* @param array $tocheck instances to check for updates
* @param array $filter check only for updates in these areas
* @return array list of warnings and instances with updates information
* @since Moodle 3.2
*/
function course_check_updates($course, $tocheck, $filter = array()) {
global $CFG, $DB;
$instances = array();
$warnings = array();
$modulescallbacksupport = array();
$modinfo = get_fast_modinfo($course);
$supportedplugins = get_plugin_list_with_function('mod', 'check_updates_since');
// Check instances.
foreach ($tocheck as $instance) {
if ($instance['contextlevel'] == 'module') {
// Check module visibility.
try {
$cm = $modinfo->get_cm($instance['id']);
} catch (Exception $e) {
$warnings[] = array(
'item' => 'module',
'itemid' => $instance['id'],
'warningcode' => 'cmidnotincourse',
'message' => 'This module id does not belong to this course.'
);
continue;
}
if (!$cm->uservisible) {
$warnings[] = array(
'item' => 'module',
'itemid' => $instance['id'],
'warningcode' => 'nonuservisible',
'message' => 'You don\'t have access to this module.'
);
continue;
}
if (empty($supportedplugins['mod_' . $cm->modname])) {
$warnings[] = array(
'item' => 'module',
'itemid' => $instance['id'],
'warningcode' => 'missingcallback',
'message' => 'This module does not implement the check_updates_since callback: ' . $instance['contextlevel'],
);
continue;
}
// Retrieve the module instance.
$instances[] = array(
'contextlevel' => $instance['contextlevel'],
'id' => $instance['id'],
'updates' => call_user_func($cm->modname . '_check_updates_since', $cm, $instance['since'], $filter)
);
} else {
$warnings[] = array(
'item' => 'contextlevel',
'itemid' => $instance['id'],
'warningcode' => 'contextlevelnotsupported',
'message' => 'Context level not yet supported ' . $instance['contextlevel'],
);
}
}
return array($instances, $warnings);
}
/**
* This function classifies a course as past, in progress or future.
*
* This function may incur a DB hit to calculate course completion.
* @param stdClass $course Course record
* @param stdClass $user User record (optional - defaults to $USER).
* @param completion_info $completioninfo Completion record for the user (optional - will be fetched if required).
* @return string (one of COURSE_TIMELINE_FUTURE, COURSE_TIMELINE_INPROGRESS or COURSE_TIMELINE_PAST)
*/
function course_classify_for_timeline($course, $user = null, $completioninfo = null) {
global $USER;
if ($user == null) {
$user = $USER;
}
$today = time();
// End date past.
if (!empty($course->enddate) && (course_classify_end_date($course) < $today)) {
return COURSE_TIMELINE_PAST;
}
if ($completioninfo == null) {
$completioninfo = new completion_info($course);
}
// Course was completed.
if ($completioninfo->is_enabled() && $completioninfo->is_course_complete($user->id)) {
return COURSE_TIMELINE_PAST;
}
// Start date not reached.
if (!empty($course->startdate) && (course_classify_start_date($course) > $today)) {
return COURSE_TIMELINE_FUTURE;
}
// Everything else is in progress.
return COURSE_TIMELINE_INPROGRESS;
}
/**
* This function calculates the end date to use for display classification purposes,
* incorporating the grace period, if any.
*
* @param stdClass $course The course record.
* @return int The new enddate.
*/
function course_classify_end_date($course) {
global $CFG;
$coursegraceperiodafter = (empty($CFG->coursegraceperiodafter)) ? 0 : $CFG->coursegraceperiodafter;
$enddate = (new \DateTimeImmutable())->setTimestamp($course->enddate)->modify("+{$coursegraceperiodafter} days");
return $enddate->getTimestamp();
}
/**
* This function calculates the start date to use for display classification purposes,
* incorporating the grace period, if any.
*
* @param stdClass $course The course record.
* @return int The new startdate.
*/
function course_classify_start_date($course) {
global $CFG;
$coursegraceperiodbefore = (empty($CFG->coursegraceperiodbefore)) ? 0 : $CFG->coursegraceperiodbefore;
$startdate = (new \DateTimeImmutable())->setTimestamp($course->startdate)->modify("-{$coursegraceperiodbefore} days");
return $startdate->getTimestamp();
}
/**
* Group a list of courses into either past, future, or in progress.
*
* The return value will be an array indexed by the COURSE_TIMELINE_* constants
* with each value being an array of courses in that group.
* E.g.
* [
* COURSE_TIMELINE_PAST => [... list of past courses ...],
* COURSE_TIMELINE_FUTURE => [],
* COURSE_TIMELINE_INPROGRESS => []
* ]
*
* @param array $courses List of courses to be grouped.
* @return array
*/
function course_classify_courses_for_timeline(array $courses) {
return array_reduce($courses, function($carry, $course) {
$classification = course_classify_for_timeline($course);
array_push($carry[$classification], $course);
return $carry;
}, [
COURSE_TIMELINE_PAST => [],
COURSE_TIMELINE_FUTURE => [],
COURSE_TIMELINE_INPROGRESS => []
]);
}
/**
* Get the list of enrolled courses for the current user.
*
* This function returns a Generator. The courses will be loaded from the database
* in chunks rather than a single query.
*
* @param int $limit Restrict result set to this amount
* @param int $offset Skip this number of records from the start of the result set
* @param string|null $sort SQL string for sorting
* @param string|null $fields SQL string for fields to be returned
* @param int $dbquerylimit The number of records to load per DB request
* @param array $includecourses courses ids to be restricted
* @param array $hiddencourses courses ids to be excluded
* @return Generator
*/
function course_get_enrolled_courses_for_logged_in_user(
int $limit = 0,
int $offset = 0,
string $sort = null,
string $fields = null,
int $dbquerylimit = COURSE_DB_QUERY_LIMIT,
array $includecourses = [],
array $hiddencourses = []
) : Generator {
$haslimit = !empty($limit);
$recordsloaded = 0;
$querylimit = (!$haslimit || $limit > $dbquerylimit) ? $dbquerylimit : $limit;
while ($courses = enrol_get_my_courses($fields, $sort, $querylimit, $includecourses, false, $offset, $hiddencourses)) {
yield from $courses;
$recordsloaded += $querylimit;
if (count($courses) < $querylimit) {
break;
}
if ($haslimit && $recordsloaded >= $limit) {
break;
}
$offset += $querylimit;
}
}
/**
* Search the given $courses for any that match the given $classification up to the specified
* $limit.
*
* This function will return the subset of courses that match the classification as well as the
* number of courses it had to process to build that subset.
*
* It is recommended that for larger sets of courses this function is given a Generator that loads
* the courses from the database in chunks.
*
* @param array|Traversable $courses List of courses to process
* @param string $classification One of the COURSE_TIMELINE_* constants
* @param int $limit Limit the number of results to this amount
* @return array First value is the filtered courses, second value is the number of courses processed
*/
function course_filter_courses_by_timeline_classification(
$courses,
string $classification,
int $limit = 0
) : array {
if (!in_array($classification,
[COURSE_TIMELINE_ALLINCLUDINGHIDDEN, COURSE_TIMELINE_ALL, COURSE_TIMELINE_PAST, COURSE_TIMELINE_INPROGRESS,
COURSE_TIMELINE_FUTURE, COURSE_TIMELINE_HIDDEN])) {
$message = 'Classification must be one of COURSE_TIMELINE_ALLINCLUDINGHIDDEN, COURSE_TIMELINE_ALL, COURSE_TIMELINE_PAST, '
. 'COURSE_TIMELINE_INPROGRESS or COURSE_TIMELINE_FUTURE';
throw new moodle_exception($message);
}
$filteredcourses = [];
$numberofcoursesprocessed = 0;
$filtermatches = 0;
foreach ($courses as $course) {
$numberofcoursesprocessed++;
$pref = get_user_preferences('block_myoverview_hidden_course_' . $course->id, 0);
// Added as of MDL-63457 toggle viewability for each user.
if ($classification == COURSE_TIMELINE_ALLINCLUDINGHIDDEN || ($classification == COURSE_TIMELINE_HIDDEN && $pref) ||
(($classification == COURSE_TIMELINE_ALL || $classification == course_classify_for_timeline($course)) && !$pref)) {
$filteredcourses[] = $course;
$filtermatches++;
}
if ($limit && $filtermatches >= $limit) {
// We've found the number of requested courses. No need to continue searching.
break;
}
}
// Return the number of filtered courses as well as the number of courses that were searched
// in order to find the matching courses. This allows the calling code to do some kind of
// pagination.
return [$filteredcourses, $numberofcoursesprocessed];
}
/**
* Search the given $courses for any that match the given $classification up to the specified
* $limit.
*
* This function will return the subset of courses that are favourites as well as the
* number of courses it had to process to build that subset.
*
* It is recommended that for larger sets of courses this function is given a Generator that loads
* the courses from the database in chunks.
*
* @param array|Traversable $courses List of courses to process
* @param array $favouritecourseids Array of favourite courses.
* @param int $limit Limit the number of results to this amount
* @return array First value is the filtered courses, second value is the number of courses processed
*/
function course_filter_courses_by_favourites(
$courses,
$favouritecourseids,
int $limit = 0
) : array {
$filteredcourses = [];
$numberofcoursesprocessed = 0;
$filtermatches = 0;
foreach ($courses as $course) {
$numberofcoursesprocessed++;
if (in_array($course->id, $favouritecourseids)) {
$filteredcourses[] = $course;
$filtermatches++;
}
if ($limit && $filtermatches >= $limit) {
// We've found the number of requested courses. No need to continue searching.
break;
}
}
// Return the number of filtered courses as well as the number of courses that were searched
// in order to find the matching courses. This allows the calling code to do some kind of
// pagination.
return [$filteredcourses, $numberofcoursesprocessed];
}
/**
* Search the given $courses for any that have a $customfieldname value that matches the given
* $customfieldvalue, up to the specified $limit.
*
* This function will return the subset of courses that matches the value as well as the
* number of courses it had to process to build that subset.
*
* It is recommended that for larger sets of courses this function is given a Generator that loads
* the courses from the database in chunks.
*
* @param array|Traversable $courses List of courses to process
* @param string $customfieldname the shortname of the custom field to match against
* @param string $customfieldvalue the value this custom field needs to match
* @param int $limit Limit the number of results to this amount
* @return array First value is the filtered courses, second value is the number of courses processed
*/
function course_filter_courses_by_customfield(
$courses,
$customfieldname,
$customfieldvalue,
int $limit = 0
) : array {
global $DB;
if (!$courses) {
return [[], 0];
}
// Prepare the list of courses to search through.
$coursesbyid = [];
foreach ($courses as $course) {
$coursesbyid[$course->id] = $course;
}
if (!$coursesbyid) {
return [[], 0];
}
list($csql, $params) = $DB->get_in_or_equal(array_keys($coursesbyid), SQL_PARAMS_NAMED);
// Get the id of the custom field.
$sql = "
SELECT f.id
FROM {customfield_field} f
JOIN {customfield_category} cat ON cat.id = f.categoryid
WHERE f.shortname = ?
AND cat.component = 'core_course'
AND cat.area = 'course'
";
$fieldid = $DB->get_field_sql($sql, [$customfieldname]);
if (!$fieldid) {
return [[], 0];
}
// Get a list of courseids that match that custom field value.
if ($customfieldvalue == COURSE_CUSTOMFIELD_EMPTY) {
$comparevalue = $DB->sql_compare_text('cd.value');
$sql = "
SELECT c.id
FROM {course} c
LEFT JOIN {customfield_data} cd ON cd.instanceid = c.id AND cd.fieldid = :fieldid
WHERE c.id $csql
AND (cd.value IS NULL OR $comparevalue = '' OR $comparevalue = '0')
";
$params['fieldid'] = $fieldid;
$matchcourseids = $DB->get_fieldset_sql($sql, $params);
} else {
$comparevalue = $DB->sql_compare_text('value');
$select = "fieldid = :fieldid AND $comparevalue = :customfieldvalue AND instanceid $csql";
$params['fieldid'] = $fieldid;
$params['customfieldvalue'] = $customfieldvalue;
$matchcourseids = $DB->get_fieldset_select('customfield_data', 'instanceid', $select, $params);
}
// Prepare the list of courses to return.
$filteredcourses = [];
$numberofcoursesprocessed = 0;
$filtermatches = 0;
foreach ($coursesbyid as $course) {
$numberofcoursesprocessed++;
if (in_array($course->id, $matchcourseids)) {
$filteredcourses[] = $course;
$filtermatches++;
}
if ($limit && $filtermatches >= $limit) {
// We've found the number of requested courses. No need to continue searching.
break;
}
}
// Return the number of filtered courses as well as the number of courses that were searched
// in order to find the matching courses. This allows the calling code to do some kind of
// pagination.
return [$filteredcourses, $numberofcoursesprocessed];
}
/**
* Check module updates since a given time.
* This function checks for updates in the module config, file areas, completion, grades, comments and ratings.
*
* @param cm_info $cm course module data
* @param int $from the time to check
* @param array $fileareas additional file ares to check
* @param array $filter if we need to filter and return only selected updates
* @return stdClass object with the different updates
* @since Moodle 3.2
*/
function course_check_module_updates_since($cm, $from, $fileareas = array(), $filter = array()) {
global $DB, $CFG, $USER;
$context = $cm->context;
$mod = $DB->get_record($cm->modname, array('id' => $cm->instance), '*', MUST_EXIST);
$updates = new stdClass();
$course = get_course($cm->course);
$component = 'mod_' . $cm->modname;
// Check changes in the module configuration.
if (isset($mod->timemodified) and (empty($filter) or in_array('configuration', $filter))) {
$updates->configuration = (object) array('updated' => false);
if ($updates->configuration->updated = $mod->timemodified > $from) {
$updates->configuration->timeupdated = $mod->timemodified;
}
}
// Check for updates in files.
if (plugin_supports('mod', $cm->modname, FEATURE_MOD_INTRO)) {
$fileareas[] = 'intro';
}
if (!empty($fileareas) and (empty($filter) or in_array('fileareas', $filter))) {
$fs = get_file_storage();
$files = $fs->get_area_files($context->id, $component, $fileareas, false, "filearea, timemodified DESC", false, $from);
foreach ($fileareas as $filearea) {
$updates->{$filearea . 'files'} = (object) array('updated' => false);
}
foreach ($files as $file) {
$updates->{$file->get_filearea() . 'files'}->updated = true;
$updates->{$file->get_filearea() . 'files'}->itemids[] = $file->get_id();
}
}
// Check completion.
$supportcompletion = plugin_supports('mod', $cm->modname, FEATURE_COMPLETION_HAS_RULES);
$supportcompletion = $supportcompletion or plugin_supports('mod', $cm->modname, FEATURE_COMPLETION_TRACKS_VIEWS);
if ($supportcompletion and (empty($filter) or in_array('completion', $filter))) {
$updates->completion = (object) array('updated' => false);
$completion = new completion_info($course);
// Use wholecourse to cache all the modules the first time.
$completiondata = $completion->get_data($cm, true);
if ($updates->completion->updated = !empty($completiondata->timemodified) && $completiondata->timemodified > $from) {
$updates->completion->timemodified = $completiondata->timemodified;
}
}
// Check grades.
$supportgrades = plugin_supports('mod', $cm->modname, FEATURE_GRADE_HAS_GRADE);
$supportgrades = $supportgrades or plugin_supports('mod', $cm->modname, FEATURE_GRADE_OUTCOMES);
if ($supportgrades and (empty($filter) or (in_array('gradeitems', $filter) or in_array('outcomes', $filter)))) {
require_once($CFG->libdir . '/gradelib.php');
$grades = grade_get_grades($course->id, 'mod', $cm->modname, $mod->id, $USER->id);
if (empty($filter) or in_array('gradeitems', $filter)) {
$updates->gradeitems = (object) array('updated' => false);
foreach ($grades->items as $gradeitem) {
foreach ($gradeitem->grades as $grade) {
if ($grade->datesubmitted > $from or $grade->dategraded > $from) {
$updates->gradeitems->updated = true;
$updates->gradeitems->itemids[] = $gradeitem->id;
}
}
}
}
if (empty($filter) or in_array('outcomes', $filter)) {
$updates->outcomes = (object) array('updated' => false);
foreach ($grades->outcomes as $outcome) {
foreach ($outcome->grades as $grade) {
if ($grade->datesubmitted > $from or $grade->dategraded > $from) {
$updates->outcomes->updated = true;
$updates->outcomes->itemids[] = $outcome->id;
}
}
}
}
}
// Check comments.
if (plugin_supports('mod', $cm->modname, FEATURE_COMMENT) and (empty($filter) or in_array('comments', $filter))) {
$updates->comments = (object) array('updated' => false);
require_once($CFG->dirroot . '/comment/lib.php');
require_once($CFG->dirroot . '/comment/locallib.php');
$manager = new comment_manager();
$comments = $manager->get_component_comments_since($course, $context, $component, $from, $cm);
if (!empty($comments)) {
$updates->comments->updated = true;
$updates->comments->itemids = array_keys($comments);
}
}
// Check ratings.
if (plugin_supports('mod', $cm->modname, FEATURE_RATE) and (empty($filter) or in_array('ratings', $filter))) {
$updates->ratings = (object) array('updated' => false);
require_once($CFG->dirroot . '/rating/lib.php');
$manager = new rating_manager();
$ratings = $manager->get_component_ratings_since($context, $component, $from);
if (!empty($ratings)) {
$updates->ratings->updated = true;
$updates->ratings->itemids = array_keys($ratings);
}
}
return $updates;
}
/**
* Returns true if the user can view the participant page, false otherwise,
*
* @param context $context The context we are checking.
* @return bool
*/
function course_can_view_participants($context) {
$viewparticipantscap = 'moodle/course:viewparticipants';
if ($context->contextlevel == CONTEXT_SYSTEM) {
$viewparticipantscap = 'moodle/site:viewparticipants';
}
return has_any_capability([$viewparticipantscap, 'moodle/course:enrolreview'], $context);
}
/**
* Checks if a user can view the participant page, if not throws an exception.
*
* @param context $context The context we are checking.
* @throws required_capability_exception
*/
function course_require_view_participants($context) {
if (!course_can_view_participants($context)) {
$viewparticipantscap = 'moodle/course:viewparticipants';
if ($context->contextlevel == CONTEXT_SYSTEM) {
$viewparticipantscap = 'moodle/site:viewparticipants';
}
throw new required_capability_exception($context, $viewparticipantscap, 'nopermissions', '');
}
}
/**
* Return whether the user can download from the specified backup file area in the given context.
*
* @param string $filearea the backup file area. E.g. 'course', 'backup' or 'automated'.
* @param \context $context
* @param stdClass $user the user object. If not provided, the current user will be checked.
* @return bool true if the user is allowed to download in the context, false otherwise.
*/
function can_download_from_backup_filearea($filearea, \context $context, stdClass $user = null) {
$candownload = false;
switch ($filearea) {
case 'course':
case 'backup':
$candownload = has_capability('moodle/backup:downloadfile', $context, $user);
break;
case 'automated':
// Given the automated backups may contain userinfo, we restrict access such that only users who are able to
// restore with userinfo are able to download the file. Users can't create these backups, so checking 'backup:userinfo'
// doesn't make sense here.
$candownload = has_capability('moodle/backup:downloadfile', $context, $user) &&
has_capability('moodle/restore:userinfo', $context, $user);
break;
default:
break;
}
return $candownload;
}
/**
* Get a list of hidden courses
*
* @param int|object|null $user User override to get the filter from. Defaults to current user
* @return array $ids List of hidden courses
* @throws coding_exception
*/
function get_hidden_courses_on_timeline($user = null) {
global $USER;
if (empty($user)) {
$user = $USER->id;
}
$preferences = get_user_preferences(null, null, $user);
$ids = [];
foreach ($preferences as $key => $value) {
if (preg_match('/block_myoverview_hidden_course_(\d)+/', $key)) {
$id = preg_split('/block_myoverview_hidden_course_/', $key);
$ids[] = $id[1];
}
}
return $ids;
}
/**
* Returns a list of the most recently courses accessed by a user
*
* @param int $userid User id from which the courses will be obtained
* @param int $limit Restrict result set to this amount
* @param int $offset Skip this number of records from the start of the result set
* @param string|null $sort SQL string for sorting
* @return array
*/
function course_get_recent_courses(int $userid = null, int $limit = 0, int $offset = 0, string $sort = null) {
global $CFG, $USER, $DB;
if (empty($userid)) {
$userid = $USER->id;
}
$basefields = array('id', 'idnumber', 'summary', 'summaryformat', 'startdate', 'enddate', 'category',
'shortname', 'fullname', 'timeaccess', 'component', 'visible');
$sort = trim($sort);
if (empty($sort)) {
$sort = 'timeaccess DESC';
} else {
$rawsorts = explode(',', $sort);
$sorts = array();
foreach ($rawsorts as $rawsort) {
$rawsort = trim($rawsort);
$sorts[] = trim($rawsort);
}
$sort = implode(',', $sorts);
}
$orderby = "ORDER BY $sort";
$ctxfields = context_helper::get_preload_record_columns_sql('ctx');
$coursefields = 'c.' .join(',', $basefields);
// Ask the favourites service to give us the join SQL for favourited courses,
// so we can include favourite information in the query.
$usercontext = \context_user::instance($userid);
$favservice = \core_favourites\service_factory::get_service_for_user_context($usercontext);
list($favsql, $favparams) = $favservice->get_join_sql_by_type('core_course', 'courses', 'fav', 'ul.courseid');
$sql = "SELECT $coursefields, $ctxfields
FROM {course} c
JOIN {context} ctx
ON ctx.contextlevel = :contextlevel
AND ctx.instanceid = c.id
JOIN {user_lastaccess} ul
ON ul.courseid = c.id
$favsql
WHERE ul.userid = :userid
AND c.visible = :visible
AND EXISTS (SELECT e.id
FROM {enrol} e
LEFT JOIN {user_enrolments} ue ON ue.enrolid = e.id
WHERE e.courseid = c.id
AND e.status = :statusenrol
AND ((ue.status = :status
AND ue.userid = ul.userid
AND ue.timestart < :now1
AND (ue.timeend = 0 OR ue.timeend > :now2)
)
OR e.enrol = :guestenrol
)
)
$orderby";
$now = round(time(), -2); // Improves db caching.
$params = ['userid' => $userid, 'contextlevel' => CONTEXT_COURSE, 'visible' => 1, 'status' => ENROL_USER_ACTIVE,
'statusenrol' => ENROL_INSTANCE_ENABLED, 'guestenrol' => 'guest', 'now1' => $now, 'now2' => $now] + $favparams;
$recentcourses = $DB->get_records_sql($sql, $params, $offset, $limit);
// Filter courses if last access field is hidden.
$hiddenfields = array_flip(explode(',', $CFG->hiddenuserfields));
if ($userid != $USER->id && isset($hiddenfields['lastaccess'])) {
$recentcourses = array_filter($recentcourses, function($course) {
context_helper::preload_from_record($course);
$context = context_course::instance($course->id, IGNORE_MISSING);
// If last access was a hidden field, a user requesting info about another user would need permission to view hidden
// fields.
return has_capability('moodle/course:viewhiddenuserfields', $context);
});
}
return $recentcourses;
}
/**
* Calculate the course start date and offset for the given user ids.
*
* If the course is a fixed date course then the course start date will be returned.
* If the course is a relative date course then the course date will be calculated and
* and offset provided.
*
* The dates are returned as an array with the index being the user id. The array
* contains the start date and start offset values for the user.
*
* If the user is not enrolled in the course then the course start date will be returned.
*
* If we have a course which starts on 1563244000 and 2 users, id 123 and 456, where the
* former is enrolled in the course at 1563244693 and the latter is not enrolled then the
* return value would look like:
* [
* '123' => [
* 'start' => 1563244693,
* 'startoffset' => 693
* ],
* '456' => [
* 'start' => 1563244000,
* 'startoffset' => 0
* ]
* ]
*
* @param stdClass $course The course to fetch dates for.
* @param array $userids The list of user ids to get dates for.
* @return array
*/
function course_get_course_dates_for_user_ids(stdClass $course, array $userids): array {
if (empty($course->relativedatesmode)) {
// This course isn't set to relative dates so we can early return with the course
// start date.
return array_reduce($userids, function($carry, $userid) use ($course) {
$carry[$userid] = [
'start' => $course->startdate,
'startoffset' => 0
];
return $carry;
}, []);
}
// We're dealing with a relative dates course now so we need to calculate some dates.
$cache = cache::make('core', 'course_user_dates');
$dates = [];
$uncacheduserids = [];
// Try fetching the values from the cache so that we don't need to do a DB request.
foreach ($userids as $userid) {
$cachekey = "{$course->id}_{$userid}";
$cachedvalue = $cache->get($cachekey);
if ($cachedvalue === false) {
// Looks like we haven't seen this user for this course before so we'll have
// to fetch it.
$uncacheduserids[] = $userid;
} else {
[$start, $startoffset] = $cachedvalue;
$dates[$userid] = [
'start' => $start,
'startoffset' => $startoffset
];
}
}
if (!empty($uncacheduserids)) {
// Load the enrolments for any users we haven't seen yet. Set the "onlyactive" param
// to false because it filters out users with enrolment start times in the future which
// we don't want.
$enrolments = enrol_get_course_users($course->id, false, $uncacheduserids);
foreach ($uncacheduserids as $userid) {
// Find the user enrolment that has the earliest start date.
$enrolment = array_reduce(array_values($enrolments), function($carry, $enrolment) use ($userid) {
// Only consider enrolments for this user if the user enrolment is active and the
// enrolment method is enabled.
if (
$enrolment->uestatus == ENROL_USER_ACTIVE &&
$enrolment->estatus == ENROL_INSTANCE_ENABLED &&
$enrolment->id == $userid
) {
if (is_null($carry)) {
// Haven't found an enrolment yet for this user so use the one we just found.
$carry = $enrolment;
} else {
// We've already found an enrolment for this user so let's use which ever one
// has the earliest start time.
$carry = $carry->uetimestart < $enrolment->uetimestart ? $carry : $enrolment;
}
}
return $carry;
}, null);
if ($enrolment) {
// The course is in relative dates mode so we calculate the student's start
// date based on their enrolment start date.
$start = $course->startdate > $enrolment->uetimestart ? $course->startdate : $enrolment->uetimestart;
$startoffset = $start - $course->startdate;
} else {
// The user is not enrolled in the course so default back to the course start date.
$start = $course->startdate;
$startoffset = 0;
}
$dates[$userid] = [
'start' => $start,
'startoffset' => $startoffset
];
$cachekey = "{$course->id}_{$userid}";
$cache->set($cachekey, [$start, $startoffset]);
}
}
return $dates;
}
/**
* Calculate the course start date and offset for the given user id.
*
* If the course is a fixed date course then the course start date will be returned.
* If the course is a relative date course then the course date will be calculated and
* and offset provided.
*
* The return array contains the start date and start offset values for the user.
*
* If the user is not enrolled in the course then the course start date will be returned.
*
* If we have a course which starts on 1563244000. If a user's enrolment starts on 1563244693
* then the return would be:
* [
* 'start' => 1563244693,
* 'startoffset' => 693
* ]
*
* If the use was not enrolled then the return would be:
* [
* 'start' => 1563244000,
* 'startoffset' => 0
* ]
*
* @param stdClass $course The course to fetch dates for.
* @param int $userid The user id to get dates for.
* @return array
*/
function course_get_course_dates_for_user_id(stdClass $course, int $userid): array {
return (course_get_course_dates_for_user_ids($course, [$userid]))[$userid];
}