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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/>.
/**
* Functions used to retrieve grades objects
*
* @package core_grades
* @category grade
* @copyright 2008 Petr Skoda and Nicolas Connault
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
/**
* Returns the aggregated or calculated course grade(s) for a single course for one or more users
*
* @param int $courseid The ID of course
* @param int|array $userid_or_ids Optional ID of the graded user or array of user IDs; if userid not used, returns only information about grade_item
* @return stdClass Returns an object containing information about course grade item. scaleid, name, grade
* and locked status etc and user course grades: $item->grades[$userid] => $usercoursegrade
*/
function grade_get_course_grades($courseid, $userid_or_ids=null) {
$grade_item = grade_item::fetch_course_item($courseid);
if ($grade_item->needsupdate) {
grade_regrade_final_grades($courseid);
}
$item = new stdClass();
$item->scaleid = $grade_item->scaleid;
$item->name = $grade_item->get_name();
$item->grademin = $grade_item->grademin;
$item->grademax = $grade_item->grademax;
$item->gradepass = $grade_item->gradepass;
$item->locked = $grade_item->is_locked();
$item->hidden = $grade_item->is_hidden();
$item->grades = array();
switch ($grade_item->gradetype) {
case GRADE_TYPE_NONE:
break;
case GRADE_TYPE_VALUE:
$item->scaleid = 0;
break;
case GRADE_TYPE_TEXT:
$item->scaleid = 0;
$item->grademin = 0;
$item->grademax = 0;
$item->gradepass = 0;
break;
}
if (empty($userid_or_ids)) {
$userids = array();
} else if (is_array($userid_or_ids)) {
$userids = $userid_or_ids;
} else {
$userids = array($userid_or_ids);
}
if ($userids) {
$grade_grades = grade_grade::fetch_users_grades($grade_item, $userids, true);
foreach ($userids as $userid) {
$grade_grades[$userid]->grade_item =& $grade_item;
$grade = new stdClass();
$grade->grade = $grade_grades[$userid]->finalgrade;
$grade->locked = $grade_grades[$userid]->is_locked();
$grade->hidden = $grade_grades[$userid]->is_hidden();
$grade->overridden = $grade_grades[$userid]->overridden;
$grade->feedback = $grade_grades[$userid]->feedback;
$grade->feedbackformat = $grade_grades[$userid]->feedbackformat;
$grade->usermodified = $grade_grades[$userid]->usermodified;
$grade->dategraded = $grade_grades[$userid]->get_dategraded();
$grade->datesubmitted = $grade_grades[$userid]->get_datesubmitted();
// create text representation of grade
if ($grade_item->needsupdate) {
$grade->grade = false;
$grade->str_grade = get_string('error');
$grade->str_long_grade = $grade->str_grade;
} else if (is_null($grade->grade)) {
$grade->str_grade = '-';
$grade->str_long_grade = $grade->str_grade;
} else {
$grade->str_grade = grade_format_gradevalue($grade->grade, $grade_item);
if ($grade_item->gradetype == GRADE_TYPE_SCALE or $grade_item->get_displaytype() != GRADE_DISPLAY_TYPE_REAL) {
$grade->str_long_grade = $grade->str_grade;
} else {
$a = new stdClass();
$a->grade = $grade->str_grade;
$a->max = grade_format_gradevalue($grade_item->grademax, $grade_item);
$grade->str_long_grade = get_string('gradelong', 'grades', $a);
}
}
// create html representation of feedback
if (is_null($grade->feedback)) {
$grade->str_feedback = '';
} else {
$grade->str_feedback = format_text($grade->feedback, $grade->feedbackformat);
}
$item->grades[$userid] = $grade;
}
}
return $item;
}
/**
* Returns the aggregated or calculated course grade for a single user for one or more courses
*
* @param int $userid The ID of the single user
* @param int|array $courseid_or_ids Optional ID of course or array of IDs, empty means all of the user's courses
* @return mixed grade info or grades array including item info, false if error
*/
function grade_get_course_grade($userid, $courseid_or_ids=null) {
if (!is_array($courseid_or_ids)) {
if (empty($courseid_or_ids)) {
if (!$courses = enrol_get_users_courses($userid)) {
return false;
}
$courseids = array_keys($courses);
return grade_get_course_grade($userid, $courseids);
}
if (!is_numeric($courseid_or_ids)) {
return false;
}
if (!$grades = grade_get_course_grade($userid, array($courseid_or_ids))) {
return false;
} else {
// only one grade - not array
$grade = reset($grades);
return $grade;
}
}
foreach ($courseid_or_ids as $courseid) {
$grade_item = grade_item::fetch_course_item($courseid);
$course_items[$grade_item->courseid] = $grade_item;
}
$grades = array();
foreach ($course_items as $grade_item) {
if ($grade_item->needsupdate) {
grade_regrade_final_grades($courseid);
}
$item = new stdClass();
$item->scaleid = $grade_item->scaleid;
$item->name = $grade_item->get_name();
$item->grademin = $grade_item->grademin;
$item->grademax = $grade_item->grademax;
$item->gradepass = $grade_item->gradepass;
$item->locked = $grade_item->is_locked();
$item->hidden = $grade_item->is_hidden();
switch ($grade_item->gradetype) {
case GRADE_TYPE_NONE:
break;
case GRADE_TYPE_VALUE:
$item->scaleid = 0;
break;
case GRADE_TYPE_TEXT:
$item->scaleid = 0;
$item->grademin = 0;
$item->grademax = 0;
$item->gradepass = 0;
break;
}
$grade_grade = new grade_grade(array('userid'=>$userid, 'itemid'=>$grade_item->id));
$grade_grade->grade_item =& $grade_item;
$grade = new stdClass();
$grade->grade = $grade_grade->finalgrade;
$grade->locked = $grade_grade->is_locked();
$grade->hidden = $grade_grade->is_hidden();
$grade->overridden = $grade_grade->overridden;
$grade->feedback = $grade_grade->feedback;
$grade->feedbackformat = $grade_grade->feedbackformat;
$grade->usermodified = $grade_grade->usermodified;
$grade->dategraded = $grade_grade->get_dategraded();
$grade->item = $item;
// create text representation of grade
if ($grade_item->needsupdate) {
$grade->grade = false;
$grade->str_grade = get_string('error');
$grade->str_long_grade = $grade->str_grade;
} else if (is_null($grade->grade)) {
$grade->str_grade = '-';
$grade->str_long_grade = $grade->str_grade;
} else {
$grade->str_grade = grade_format_gradevalue($grade->grade, $grade_item);
if ($grade_item->gradetype == GRADE_TYPE_SCALE or $grade_item->get_displaytype() != GRADE_DISPLAY_TYPE_REAL) {
$grade->str_long_grade = $grade->str_grade;
} else {
$a = new stdClass();
$a->grade = $grade->str_grade;
$a->max = grade_format_gradevalue($grade_item->grademax, $grade_item);
$grade->str_long_grade = get_string('gradelong', 'grades', $a);
}
}
// create html representation of feedback
if (is_null($grade->feedback)) {
$grade->str_feedback = '';
} else {
$grade->str_feedback = format_text($grade->feedback, $grade->feedbackformat);
}
$grades[$grade_item->courseid] = $grade;
}
return $grades;
}
/**
* Returns all grade items (including outcomes) or main item for a given activity identified by $cm object.
*
* @param cm_info $cm A course module object (preferably with modname property)
* @param bool $only_main_item Limit the search to the primary grade item for the activity, 'itemnumber'==0
* @return mixed An array of grade item instances, one grade item if $only_main_item == true, false if error or not found
*/
function grade_get_grade_items_for_activity($cm, $only_main_item=false) {
global $CFG, $DB;
if (!isset($cm->modname)) {
$params = array($cm->id);
$cm = $DB->get_record_sql("SELECT cm.*, md.name as modname
FROM {course_modules} cm,
{modules} md
WHERE cm.id = ? AND md.id = cm.module", $params);
}
if (empty($cm) or empty($cm->instance) or empty($cm->course)) {
debugging("Incorrect cm parameter in grade_get_grade_items_for_activity()!");
return false;
}
if ($only_main_item) {
return grade_item::fetch_all(array('itemtype'=>'mod', 'itemmodule'=>$cm->modname, 'iteminstance'=>$cm->instance, 'courseid'=>$cm->course, 'itemnumber'=>0));
} else {
return grade_item::fetch_all(array('itemtype'=>'mod', 'itemmodule'=>$cm->modname, 'iteminstance'=>$cm->instance, 'courseid'=>$cm->course));
}
}
/**
* Returns whether or not a user received grades in main grade item for given activity
*
* @param cm_info $cm The activity context module
* @param int $userid The user ID
* @return bool True if graded, false if user not graded yet
*/
function grade_is_user_graded_in_activity($cm, $userid) {
$grade_items = grade_get_grade_items_for_activity($cm, true);
if (empty($grade_items)) {
return false;
}
$grade_item = reset($grade_items);
if ($grade_item->gradetype == GRADE_TYPE_NONE) {
return false;
}
if ($grade_item->needsupdate) {
// activity items should never fail to regrade
grade_regrade_final_grades($grade_item->courseid);
}
if (!$grade = $grade_item->get_final($userid)) {
return false;
}
if (is_null($grade->finalgrade)) {
return false;
}
return true;
}
/**
* Returns an array of activities (defined as $cm objects) which are gradeable from gradebook, outcomes are ignored.
*
* @param int $courseid If provided then restrict to one course.
* @param string $modulename If defined (could be 'forum', 'assignment' etc) then only that type are returned.
* @return array $cm objects
*/
function grade_get_gradable_activities($courseid, $modulename='') {
global $CFG, $DB;
if (empty($modulename)) {
if (!$modules = $DB->get_records('modules', array('visible' => '1'))) {
return false;
}
$result = array();
foreach ($modules as $module) {
if ($cms = grade_get_gradable_activities($courseid, $module->name)) {
$result = $result + $cms;
}
}
if (empty($result)) {
return false;
} else {
return $result;
}
}
$params = array($courseid, $modulename, GRADE_TYPE_NONE, $modulename);
$sql = "SELECT cm.*, m.name, md.name as modname
FROM {grade_items} gi, {course_modules} cm, {modules} md, {{$modulename}} m
WHERE gi.courseid = ? AND
gi.itemtype = 'mod' AND
gi.itemmodule = ? AND
gi.itemnumber = 0 AND
gi.gradetype != ? AND
gi.iteminstance = cm.instance AND
cm.instance = m.id AND
md.name = ? AND
md.id = cm.module";
return $DB->get_records_sql($sql, $params);
}