225 lines
7.9 KiB
PHP
225 lines
7.9 KiB
PHP
<?php
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// This file is part of the Studyplan plugin for Moodle
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <https://www.gnu.org/licenses/>.
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/**
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* Scan gradables for a pending grading action
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* @package local_treestudyplan
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* @copyright 2023 P.M. Kuipers
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* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace local_treestudyplan;
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->libdir.'/externallib.php');
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use \grade_item;
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/**
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* Scan gradables for a pending grading action
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*/
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class gradingscanner {
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/**
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* Cache of supported mods
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* @var array
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*/
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private static $modsupported = [];
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/**
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* Cache of enrolled students in a particular course
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* @var array
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*/
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private static $coursestudents = [];
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/** The internally used grading scanner
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* @var local\ungradedscanners\scanner_base
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*/
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private $scanner = null;
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/** @var grade_item */
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private $gi = null;
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/**
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* Cache of pending ungraded results per user
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* @var array
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*/
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private $pendingcache = [];
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/**
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* Check if a certain activity type is supported for scanning pending results
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* @param string $mod name of activity module
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*/
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public static function supported($mod) : bool {
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if (!array_key_exists($mod, self::$modsupported)) {
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self::$modsupported[$mod] = class_exists("\local_treestudyplan\\local\\ungradedscanners\\{$mod}_scanner");
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}
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return self::$modsupported[$mod];
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}
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/**
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* List all users enrolled in a course as student by userid
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* @param int $courseid Course id of the course to check
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* @return int[] Array if user ids
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*/
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public static function get_course_students($courseid) : array {
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global $CFG;
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if (!array_key_exists($courseid, self::$coursestudents)) {
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$students = [];
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$context = \context_course::instance($courseid);
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foreach (explode(', ', $CFG->gradebookroles) as $roleid) {
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$roleid = trim($roleid);
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$students = array_keys(get_role_users($roleid, $context, false, 'u.id', 'u.id ASC'));
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}
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self::$coursestudents[$courseid] = $students;
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}
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return self::$coursestudents[$courseid];
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}
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/**
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* Construct new scanner based on grade item
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* @param grade_item $gi Grade item
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*/
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public function __construct(grade_item $gi) {
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$this->courseid = $gi->courseid;
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$this->gi = $gi;
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if (self::supported($gi->itemmodule)) {
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$scannerclass = "\local_treestudyplan\\local\ungradedscanners\\{$gi->itemmodule}_scanner";
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$this->scanner = new $scannerclass($gi);
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}
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}
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/**
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* Check if this scanner is usable (has an internal activity specific scanner)
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*/
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public function is_available() : bool {
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return $this->scanner !== null;
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}
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/**
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* Check if the gradable item this scanner scans has pending submissions for a specific user
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* @param int $userid ID of the user to check for
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*/
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public function pending($userid) : bool {
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if (!array_key_exists($userid, $this->pendingcache)) {
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if ($this->scanner === null) {
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$this->pendingcache[$userid] = false;
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} else {
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$this->pendingcache[$userid] = $this->scanner->has_ungraded_submission($userid);;
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}
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}
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return $this->pendingcache[$userid];
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}
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/**
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* Webservice structure for basic info
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* @param int $value Webservice requirement constant
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*/
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public static function structure($value = VALUE_OPTIONAL) : \external_description {
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return new \external_single_structure([
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"ungraded" => new \external_value(PARAM_INT, 'number of ungraded submissions'),
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"completed" => new \external_value(PARAM_INT, 'number of completed students'),
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"completed_pass" => new \external_value(PARAM_INT, 'number of completed-pass students'),
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"completed_fail" => new \external_value(PARAM_INT, 'number of completed-fail students'),
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"students" => new \external_value(PARAM_INT, 'number of students that should submit'),
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], "details about gradable submissions", $value);
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}
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/**
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* Webservice model for basic info
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*/
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public function model() : array {
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// Upda.
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$students = self::get_course_students($this->courseid);
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$completed = 0;
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$ungraded = 0;
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$completedpass = 0;
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$completedfail = 0;
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foreach ($students as $userid) {
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if ($this->pending($userid)) {
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// First check if the completion needs grading.
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$ungraded++;
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} else {
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$grade = $this->gi->get_final($userid);
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if ( (!empty($grade->finalgrade)) && is_numeric($grade->finalgrade)) {
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// Compare grade to minimum grade.
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if ($this->grade_passed($grade)) {
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$completedpass++;
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} else {
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$completedfail++;
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}
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}
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}
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}
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return [
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'ungraded' => $ungraded,
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'completed' => $completed,
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'completed_pass' => $completedpass,
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'completed_fail' => $completedfail,
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'students' => count($students),
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];
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}
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/**
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* Check if a grade is considered passed according to the rules
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* @param grade_grade $grade
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*/
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private function grade_passed($grade) : bool {
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// Function copied from bistate aggregator to avoid reference mazes.
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global $DB;
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$table = "local_treestudyplan_gradecfg";
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// First determine if we have a grade_config for this scale or this maximum grade.
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$finalgrade = $grade->finalgrade;
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$scale = $this->gi->load_scale();
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if ( isset($scale)) {
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$gradecfg = $DB->get_record($table, ["scale_id" => $scale->id]);
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} else if ($this->gi->grademin == 0) {
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$gradecfg = $DB->get_record($table, ["grade_points" => $this->gi->grademax]);
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} else {
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$gradecfg = null;
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}
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// For point grades, a provided grade pass overrides the defaults in the gradeconfig.
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// For scales, the configuration in the gradeconfig is leading.
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if ($gradecfg && (isset($scale) || $this->gi->gradepass == 0)) {
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// If so, we need to know if the grade is .
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if ($finalgrade >= $gradecfg->min_completed) {
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return true;
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} else {
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return false;
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}
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} else if ($this->gi->gradepass > 0) {
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$range = floatval($this->gi->grademax - $this->gi->grademin);
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// If no gradeconfig and gradepass is set, use that one to determine config.
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if ($finalgrade >= $this->gi->gradepass) {
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return true;
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} else {
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return false;
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}
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} else {
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// Blind assumptions if nothing is provided.
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// Over 55% of range is completed.
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// If range >= 3 and failed is enabled, assume that this means failed.
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$g = floatval($finalgrade - $this->gi->grademin);
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$range = floatval($this->gi->grademax - $this->gi->grademin);
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$score = $g / $range;
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if ($score > 0.55) {
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return true;
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} else {
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return false;
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}
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}
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}
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}
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