moodle_local_treestudyplan/classes/courseinfo.php

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<?php
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// This file is part of the Studyplan plugin for Moodle
//
// 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 <https://www.gnu.org/licenses/>.
/**
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* Class to process information about a course
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* @package local_treestudyplan
* @copyright 2023 P.M. Kuipers
* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace local_treestudyplan;
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defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir.'/externallib.php');
require_once($CFG->libdir.'/gradelib.php');
require_once($CFG->dirroot.'/course/lib.php');
use core_course\local\repository\caching_content_item_readonly_repository;
use core_course\local\repository\content_item_readonly_repository;
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use grade_item;
use grade_scale;
use grade_outcome;
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/**
* Class to process information about a course
*/
class courseinfo {
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/**
* Table name used in this class
* @var string */
const TABLE = 'course';
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/** @var stdClass */
private $course;
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/** @var \context */
private $context;
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/** @var \context */
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private $coursecontext;
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/** @var studyitem */
private $studyitem;
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/** @var array */
private static $contentitems = null;
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/**
* Cache of enrolled students in a particular course
* @var array
*/
private static $coursestudents = [];
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/**
* Return database identifier
* @return int
*/
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public function id() {
return $this->course->id;
}
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/**
* Return short name
* @return string
*/
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public function shortname() {
return $this->course->shortname;
}
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/**
* Return course record
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* @return \stdClass
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*/
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public function course() {
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return $this->course;
}
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/**
* Return course context
* @return \context
*/
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public function course_context() {
return $this->coursecontext;
}
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/**
* Return course's category context
* @return \context
*/
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public function category_context() {
return $this->context;
}
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/**
* Get content items (activity icons) from the repository
* @return content_item[]
*/
protected function get_contentitems() {
global $PAGE;
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if (empty(static::$contentitems)) {
$PAGE->set_context(\context_system::instance());
static::$contentitems = (new content_item_readonly_repository())->find_all();
}
return static::$contentitems;
}
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/**
* Check if current user is teacher in this course
* @return book
*/
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protected function am_teacher(): bool {
global $USER;
return is_enrolled($this->coursecontext, $USER, 'mod/assign:grade');
}
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/**
* Check if specified user can select gradables in this course
* @param int $userid User id to check for . Leave empty to check current user
*/
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protected function i_can_select_gradables($userid = -1) {
global $USER, $DB;
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if ($userid <= 0) {
$usr = $USER;
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} else {
$usr = $DB->get_record('user', ['id' => $userid, 'deleted' => 0]);
}
return($usr && is_enrolled($this->coursecontext, $usr, 'local/treestudyplan:selectowngradables'));
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}
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/**
* Get specific contentitem (activity icons) by name
* @param mixed $name Name of content item
* @return content_item|null
*/
public static function get_contentitem($name) {
$contentitems = static::get_contentitems();
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for ($i = 0; $i < count($contentitems); $i++) {
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if ($contentitems[$i]->get_name() == $name) {
return $contentitems[$i];
}
}
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return null;
}
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/**
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* Construct courseinfo based on course id and
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* @param int $id Course id
* @param studyitem|null $studyitem Studyitem linking this course (if applicable)
*/
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public function __construct($id, studyitem $studyitem = null) {
global $DB;
$this->studyitem = $studyitem;
$this->course = \get_course($id);
$this->context = \context_coursecat::instance($this->course->category);
$this->coursecontext = \context_course::instance($this->course->id);
}
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/**
* Check if a course with the given ID exists
* @param int $id Course id
* @return bool
*/
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public static function exists($id) {
global $DB;
return is_numeric($id) && $DB->record_exists(self::TABLE, ['id' => $id]);
}
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/**
* Find course id from shortname
* @param string $shortname Shortname of the course
* @return int Course id
*/
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public static function id_from_shortname($shortname) {
global $DB;
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return $DB->get_field(self::TABLE, "id", ['shortname' => $shortname]);
}
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/**
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* Determine course timing [future, present or past] based on a course date
* @param stdClass $course Course database record
* @return string 'future', 'present' or 'past'
*/
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public static function coursetiming($course) {
$now = time();
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if ($now > $course->startdate) {
if ($course->enddate > 0 && $now > $course->enddate) {
return "past";
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} else {
return "present";
}
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} else {
return "future";
}
}
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/**
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* Determine course timing for this course [future, present or past]
* @return string 'future', 'present' or 'past'
*/
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public function timing() {
return self::coursetiming($this->course);
}
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/**
* Determine proper display name for this course based on config settings, custom fields etc...
* @return string Display name for the course
*/
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public function displayname() {
$displayfield = get_config("local_treestudyplan", "display_field");
if ($displayfield == "idnumber") {
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$idnumber = trim(preg_replace("/\s+/u", " ", $this->course->idnumber));
if (strlen($idnumber) > 0) {
return $this->course->idnumber;
}
} else if ($displayfield == "fullname") {
$fullname = trim(preg_replace("/\s+/u", " ", $this->course->fullname));
if (strlen($fullname) > 0) {
return $fullname;
}
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} else if (strpos( $displayfield , "customfield_") === 0) {
$fieldname = substr($displayfield, strlen("customfield_"));
$handler = \core_customfield\handler::get_handler('core_course', 'course');
$datas = $handler->get_instance_data($this->course->id);
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foreach ($datas as $data) {
if ($data->get_field()->get('shortname') == $fieldname) {
$value = trim(preg_replace("/\s+/u", " ", $data->get_value()));
if (strlen($value) > 0) {
return $value;
}
}
}
}
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// Fallback to shortname when the specified display field fails, since shortname is never empty.
return $this->course->shortname;
}
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/**
* Webservice structure for basic info
* @param int $value Webservice requirement constant
*/
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public static function simple_structure($value = VALUE_REQUIRED): \external_description {
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'linked course id'),
"fullname" => new \external_value(PARAM_TEXT, 'linked course name'),
"shortname" => new \external_value(PARAM_TEXT, 'linked course shortname'),
"displayname" => new \external_value(PARAM_TEXT, 'linked course displayname'),
"context" => contextinfo::structure(VALUE_OPTIONAL),
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], 'referenced course information', $value);
}
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/**
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* Webservice model for basic info
* @return array Webservice data model
*/
public function simple_model() {
$contextinfo = new contextinfo($this->context);
$info = [
'id' => $this->course->id,
'fullname' => $this->course->fullname,
'shortname' => $this->course->shortname,
'displayname' => $this->displayname(),
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'context' => $contextinfo->model(),
];
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return $info;
}
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/**
* Webservice structure for editor info
* @param int $value Webservice requirement constant
*/
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public static function editor_structure($value = VALUE_REQUIRED): \external_description {
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'linked course id'),
"fullname" => new \external_value(PARAM_TEXT, 'linked course name'),
"shortname" => new \external_value(PARAM_TEXT, 'linked course shortname'),
"displayname" => new \external_value(PARAM_TEXT, 'linked course displayname'),
"context" => contextinfo::structure(VALUE_OPTIONAL),
"ctxid" => new \external_value(PARAM_INT, 'course context id name'),
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"grades" => new \external_multiple_structure(gradeinfo::editor_structure(),
'grade list (legacy list)', VALUE_OPTIONAL),
"completion" => corecompletioninfo::editor_structure(VALUE_OPTIONAL),
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"competency" => coursecompetencyinfo::editor_structure(VALUE_OPTIONAL),
"timing" => new \external_value(PARAM_TEXT, '(past|present|future)'),
"startdate" => new \external_value(PARAM_TEXT, 'Course start date'),
"enddate" => new \external_value(PARAM_TEXT, 'Course end date'),
"amteacher" => new \external_value(PARAM_BOOL, 'Requesting user is teacher in this course'),
"canupdatecourse" => new \external_value(PARAM_BOOL, "If the current user can update this course"),
"canselectgradables" => new \external_value(PARAM_BOOL, 'Requesting user can change selected gradables'),
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"numenrolled" => new \external_value(PARAM_INT, 'number of students from this studyplan enrolled in the course'),
"tag" => new \external_value(PARAM_TEXT, 'Tag'),
"extrafields" => self::extrafields_structure(),
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], 'referenced course information', $value);
}
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/**
* Webservice model for editor info
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* @param studyitem $studyitem Specify a specific study item to check gradable selections for. Leave empty to use default
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* @return array Webservice data model
*/
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public function editor_model() {
$contextinfo = new contextinfo($this->context);
$timing = $this->timing();
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if (isset($this->studyitem)) {
$numenrolled = $this->count_enrolled_students($this->studyitem->studyline()->studyplan()->find_linked_userids());
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} else {
$numenrolled = 0;
}
$info = [
'id' => $this->course->id,
'fullname' => $this->course->fullname,
'shortname' => $this->course->shortname,
'displayname' => $this->displayname(),
'context' => $contextinfo->model(),
'ctxid' => $this->coursecontext->id,
'timing' => $timing,
'startdate' => date("Y-m-d", $this->course->startdate),
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'enddate' => date("Y-m-d", $this->course->enddate),
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'amteacher' => $this->am_teacher(),
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'canupdatecourse' => \has_capability("moodle/course:update", $this->coursecontext),
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'canselectgradables' => $this->i_can_select_gradables(),
'tag' => "Editormodel",
'extrafields' => $this->extrafields_model(true),
'grades' => [],
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'numenrolled' => $numenrolled,
];
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if (isset($this->studyitem)) {
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$aggregator = $this->studyitem->studyline()->studyplan()->aggregator();
if ($aggregator->use_manualactivityselection()) {
$gradables = gradeinfo::list_course_gradables($this->course, $this->studyitem );
foreach ($gradables as $gradable) {
$info['grades'][] = $gradable->editor_model($this->studyitem);
}
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}
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if ($aggregator->use_corecompletioninfo()) {
$cc = new corecompletioninfo($this->course, $this->studyitem);
$studentlist = $this->studyitem->studyline()->studyplan()->find_linked_userids();
$info['completion'] = $cc->editor_model($studentlist);
}
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if ($aggregator->use_coursecompetencies()) {
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$ci = new coursecompetencyinfo($this->course, $this->studyitem);
$studentlist = $this->studyitem->studyline()->studyplan()->find_linked_userids();
$info['competency'] = $ci->editor_model($studentlist);
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}
}
return $info;
}
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/**
* Webservice structure for userinfo
* @param int $value Webservice requirement constant
*/
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public static function user_structure($value = VALUE_REQUIRED): \external_description {
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'linked course id'),
"fullname" => new \external_value(PARAM_TEXT, 'linked course name'),
"shortname" => new \external_value(PARAM_TEXT, 'linked course shortname'),
"displayname" => new \external_value(PARAM_TEXT, 'linked course displayname'),
"context" => contextinfo::structure(VALUE_OPTIONAL),
"ctxid" => new \external_value(PARAM_INT, 'course context id name'),
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"grades" => new \external_multiple_structure(gradeinfo::user_structure(), 'grade list (legacy list)', VALUE_OPTIONAL),
"completion" => corecompletioninfo::user_structure(VALUE_OPTIONAL),
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"competency" => coursecompetencyinfo::user_structure(VALUE_OPTIONAL),
"timing" => new \external_value(PARAM_TEXT, '(past|present|future)'),
"startdate" => new \external_value(PARAM_TEXT, 'Course start date'),
"enddate" => new \external_value(PARAM_TEXT, 'Course end date'),
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"enrolled" => new \external_value(PARAM_BOOL, 'True if student is enrolled as student in this course'),
"extrafields" => self::extrafields_structure(),
"showprogressbar" => new \external_value(PARAM_BOOL, "Whether to show the progress bar in the header"),
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], 'course information', $value);
}
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/**
* List all users enrolled in a course as student by userid
* @param int $courseid Course id of the course to check
* @return int[] Array if user ids
*/
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public static function get_course_students($courseid): array {
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global $CFG;
if (!array_key_exists($courseid, self::$coursestudents)) {
$students = [];
$context = \context_course::instance($courseid);
foreach (explode(', ', $CFG->gradebookroles) as $roleid) {
$roleid = trim($roleid);
$students = array_keys(get_role_users($roleid, $context, false, 'u.id', 'u.id ASC'));
}
self::$coursestudents[$courseid] = $students;
}
return self::$coursestudents[$courseid];
}
/**
* Check if a user is enrolled as a student in this course
* (Has a gradebook role)
* @param int $userid The user Id to check
*/
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public function is_enrolled_student($userid): bool {
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global $CFG;
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foreach (explode(', ', $CFG->gradebookroles) as $roleid) {
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if (user_has_role_assignment($userid, $roleid, $this->coursecontext->id)) {
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return true;
}
}
return false;
}
/**
* List how many users from a list also enrolled as students
* (Has a gradebook role)
* @param int[] $userids The user Ids to check
*/
private function count_enrolled_students(array $userids) {
$count = 0;
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foreach ($userids as $userid) {
if ($this->is_enrolled_student($userid)) {
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$count++;
}
}
return $count;
}
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/**
* Webservice model for user info
* @param int $userid ID of user to check specific info for
* @return array Webservice data model
*/
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public function user_model($userid) {
global $DB;
$contextinfo = new contextinfo($this->context);
$timing = $this->timing();
$info = [
'id' => $this->course->id,
'fullname' => $this->course->fullname,
'shortname' => $this->course->shortname,
'displayname' => $this->displayname(),
'context' => $contextinfo->model(),
'ctxid' => $this->coursecontext->id,
'timing' => $timing,
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'startdate' => date("Y-m-d", $this->course->startdate),
'enddate' => date("Y-m-d", $this->course->enddate),
'grades' => [],
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'enrolled' => $this->is_enrolled_student($userid),
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'extrafields' => $this->extrafields_model(),
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'showprogressbar' => get_config("local_treestudyplan", "courseprogressbar"),
];
if (isset($this->studyitem)) {
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$aggregator = $this->studyitem->studyline()->studyplan()->aggregator();
if ($aggregator->use_manualactivityselection()) {
$gradables = gradeinfo::list_studyitem_gradables($this->studyitem);
foreach ($gradables as $gi) {
$info['grades'][] = $gi->user_model($userid);
}
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}
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if ($aggregator->use_corecompletioninfo()) {
$cc = new corecompletioninfo($this->course, $this->studyitem);
$info['completion'] = $cc->user_model($userid);
}
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if ($aggregator->use_coursecompetencies()) {
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$ci = new coursecompetencyinfo($this->course, $this->studyitem);
$info['competency'] = $ci->user_model($userid);
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}
}
return $info;
}
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/**
* Webservice structure for extra fields
* @param int $value Webservice requirement constant
*/
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public static function extrafields_structure($value = VALUE_REQUIRED): \external_description {
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return new \external_multiple_structure(new \external_single_structure([
"title" => new \external_value(PARAM_RAW, 'title'),
"value" => new \external_value(PARAM_RAW, 'value'),
"position" => new \external_value(PARAM_TEXT, 'position'),
"type" => new \external_value(PARAM_TEXT, 'value type'),
"fieldname" => new \external_value(PARAM_TEXT, 'field name'),
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"checked" => new \external_value(PARAM_BOOL, 'checkbox value', VALUE_OPTIONAL),
"courseid" => new \external_value(PARAM_TEXT, 'course id number'),
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], 'referenced course information'), $value);
}
/**
* Webservice model for basic info
* @param $includeteachervisible Include custom fiel
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* @return array Webservice data model
*/
public function extrafields_model($includeteachervisible=false) {
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$list = [];
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for ($i = 1; $i <= 5; $i++) {
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$field = get_config('local_treestudyplan', 'courseinfo'.$i.'_field');
if ($field) {
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$title = self::extrafields_localize_title(get_config('local_treestudyplan', 'courseinfo'.$i.'_title'));
$pos = get_config('local_treestudyplan', 'courseinfo'.$i.'_position');
[$value, $type, $raw] = $this->extrafields_value($field, $includeteachervisible);
if ($type) {
$list[] = [
"title" => $title,
"value" => $value,
"position" => $pos,
"type" => $type,
"fieldname" => $field,
"courseid" => $this->course->id,
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"checked" => ($type == "checkbox") ? ($raw ? true : false) : null,
];
}
}
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}
return $list;
}
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/**
* Localize title for extra field
* @param string $field
*/
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protected static function extrafields_localize_title($field) {
$lang = trim(current_language());
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$lines = explode("\n", $field);
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$title = "";
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$fallback = ""; // Fallback to first title.
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foreach ($lines as $l) {
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$parts = explode("|", $l, 2);
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if (count($parts) > 0) {
// Set the first line as fallback.
if (empty($firsttitle) && !empty($parts[0])) {
$fallback = $parts[0];
}
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if (count($parts) == 1 && empty($title)) {
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// Set line without language as default if no localized line found.
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$title = trim($parts[0]);
} else if (trim($parts[1]) == $lang) {
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return trim($parts[0]);
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}
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}
}
// Return default title or fall back to first localizef title.
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return (strlen($title) > 0) ? $title : $fallback;
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}
/**
* Determine value and type of an extra field for this course
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* @return array [value, type] of the field for this
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*/
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protected function extrafields_value($fieldname, $includeteachervisible=false) {
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global $PAGE;
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if ($fieldname == "description") {
// Process embedded files.
$value = \file_rewrite_pluginfile_urls(
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// The description content.
$this->course()->summary,
// The pluginfile URL which will serve the request.
'pluginfile.php',
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// The combination of contextid / component / filearea / itemid.
// Form the virtual bucket that file are stored in.
$this->coursecontext->id, // System instance is always used for this.
'course',
'summary',
''
);
return [$value, "textarea", $this->course()->summary];
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} else if ($fieldname == "idnumber") {
$idnumber = trim(preg_replace("/\s+/u", " ", $this->course->idnumber));
return [$idnumber, "text", $this->course->idnumber];
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} else if ($fieldname == "contacts") {
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$cle = new \core_course_list_element($this->course());
$contacts = $cle->get_course_contacts();
$value = "";
foreach ($contacts as $uid => $contact) {
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if (strlen($value) > 0) {
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$value .= ", ";
}
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$value .= $contact["username"];
}
if (empty($value)) {
$value = get_string("none");
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}
return [$value, "text", $value];
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} else if (strpos( $fieldname , "customfield_") === 0) {
$fieldshortname = substr($fieldname, strlen("customfield_"));
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$handler = \core_customfield\handler::get_handler('core_course', 'course');
$datas = $handler->get_instance_data($this->course->id);
foreach ($datas as $data) {
$field = $data->get_field();
$fshortname = $field->get('shortname');
if ($fshortname == $fieldshortname) {
$visibility = $field->get_configdata_property("visibility");
$raw = $data->get_value();
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$type = $field->get('type');
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// Only show if visibility is "Everyone" or ("Teachers" and in teacher view ).
if ($visibility > 0 && ($visibility == 2 || $includeteachervisible)) {
if ($type == "date") {
// Date should be converted to YYYY-MM-DD so the javascript can properly format it.
if ($raw == 0) {
$value = "";
} else {
// Convert to YYYY-MM-DD format.
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$value = date("Y-m-d", $raw);
}
} else {
// Everything else can just use the export value.
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$PAGE->set_context(\context_system::instance());
$value = $data->export_value();
}
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return [$value, $type, $raw];
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}
}
}
}
// Fallback to empty if finding a match fails.
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return [null, null, null];
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}
}