moodle-mod-customcert/element/grade/lib.php

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<?php
// This file is part of the customcert module for 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/>.
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defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
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require_once($CFG->dirroot . '/mod/customcert/element/element.class.php');
require_once($CFG->libdir . '/grade/constants.php');
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require_once($CFG->dirroot . '/grade/lib.php');
require_once($CFG->dirroot . '/grade/querylib.php');
/**
* Grade - Course
*/
define('CUSTOMCERT_GRADE_COURSE', '0');
/**
* The customcert element grade's core interaction API.
*
* @package customcertelement_grade
* @copyright 2013 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class customcert_element_grade extends customcert_element_base {
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/**
* This function renders the form elements when adding a customcert element.
*
* @param mod_customcert_edit_element_form $mform the edit_form instance
*/
public function render_form_elements($mform) {
// Get the grade items we can display.
$gradeitems = array();
$gradeitems[CUSTOMCERT_GRADE_COURSE] = get_string('coursegrade', 'customcertelement_grade');
$gradeitems = $gradeitems + self::get_grade_items();
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// The grade items.
$mform->addElement('select', 'gradeitem', get_string('gradeitem', 'customcertelement_grade'), $gradeitems);
$mform->setType('gradeitem', PARAM_INT);
$mform->addHelpButton('gradeitem', 'gradeitem', 'customcertelement_grade');
// The grade format.
$mform->addElement('select', 'gradeformat', get_string('gradeformat', 'customcertelement_grade'), self::get_grade_format_options());
$mform->setType('gradeformat', PARAM_INT);
$mform->addHelpButton('gradeformat', 'gradeformat', 'customcertelement_grade');
parent::render_form_elements($mform);
}
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/**
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* This will handle how form data will be saved into the data column in the
* customcert_elements table.
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*
* @param stdClass $data the form data.
* @return string the json encoded array
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*/
public function save_unique_data($data) {
// Array of data we will be storing in the database.
$arrtostore = array(
'gradeitem' => $data->gradeitem,
'gradeformat' => $data->gradeformat
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);
// Encode these variables before saving into the DB.
return json_encode($arrtostore);
}
/**
* Handles rendering the element on the pdf.
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*
* @param pdf $pdf the pdf object
* @param bool $preview true if it is a preview, false otherwise
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*/
public function render($pdf, $preview) {
global $COURSE, $USER;
// If there is no element data, we have nothing to display.
if (empty($this->element->data)) {
return;
}
// Decode the information stored in the database.
$gradeinfo = json_decode($this->element->data);
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// If we are previewing this certificate then just show a demonstration grade.
if ($preview) {
$courseitem = grade_item::fetch_course_item($COURSE->id);
$grade = grade_format_gradevalue('100', $courseitem, true, $gradeinfo->gradeformat, 2);
} else {
// Get the grade for the grade item.
$grade = self::get_grade($gradeinfo, $USER->id);
}
parent::render_content($pdf, $grade);
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}
/**
* Render the element in html.
*
* This function is used to render the element when we are using the
* drag and drop interface to position it.
*/
public function render_html() {
global $COURSE;
// If there is no element data, we have nothing to display.
if (empty($this->element->data)) {
return;
}
// Decode the information stored in the database.
$gradeinfo = json_decode($this->element->data);
$courseitem = grade_item::fetch_course_item($COURSE->id);
// Define how many decimals to display.
$decimals = 2;
if ($gradeinfo->gradeformat == GRADE_DISPLAY_TYPE_PERCENTAGE) {
$decimals = 0;
}
$grade = grade_format_gradevalue('100', $courseitem, true, $gradeinfo->gradeformat, $decimals);
return parent::render_html_content($grade);
}
/**
* Sets the data on the form when editing an element.
*
* @param mod_customcert_edit_element_form $mform the edit_form instance
*/
public function definition_after_data($mform) {
// Set the item and format for this element.
$gradeinfo = json_decode($this->element->data);
$this->element->gradeitem = $gradeinfo->gradeitem;
$this->element->gradeformat = $gradeinfo->gradeformat;
parent::definition_after_data($mform);
}
/**
* This function is responsible for handling the restoration process of the element.
*
* We will want to update the course module the grade element is pointing to as it will
* have changed in the course restore.
*
* @param restore_customcert_activity_task $restore
*/
public function after_restore($restore) {
global $DB;
$gradeinfo = json_decode($this->element->data);
if ($newitem = restore_dbops::get_backup_ids_record($restore->get_restoreid(), 'course_module', $gradeinfo->gradeitem)) {
$gradeinfo->gradeitem = $newitem->newitemid;
$DB->set_field('customcert_elements', 'data', self::save_unique_data($gradeinfo), array('id' => $this->element->id));
}
}
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/**
* Helper function to return all the grades items for this course.
*
* @return array the array of gradeable items in the course
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*/
public static function get_grade_items() {
global $COURSE, $DB;
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// Array to store the grade items.
$modules = array();
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// Collect course modules data.
$modinfo = get_fast_modinfo($COURSE);
$mods = $modinfo->get_cms();
$sections = $modinfo->get_section_info_all();
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// Create the section label depending on course format.
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switch ($COURSE->format) {
case 'topics':
$sectionlabel = get_string('topic');
break;
case 'weeks':
$sectionlabel = get_string('week');
break;
default:
$sectionlabel = get_string('section');
break;
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}
// Loop through each course section.
for ($i = 0; $i <= count($sections) - 1; $i++) {
// Confirm the index exists, should always be true.
if (isset($sections[$i])) {
// Get the individual section.
$section = $sections[$i];
// Get the mods for this section.
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$sectionmods = explode(",", $section->sequence);
// Loop through the section mods.
foreach ($sectionmods as $sectionmod) {
// Should never happen unless DB is borked.
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if (empty($mods[$sectionmod])) {
continue;
}
$mod = $mods[$sectionmod];
$instance = $DB->get_record($mod->modname, array('id' => $mod->instance));
// Get the grade items for this activity.
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if ($gradeitems = grade_get_grade_items_for_activity($mod)) {
$moditem = grade_get_grades($COURSE->id, 'mod', $mod->modname, $mod->instance);
$gradeitem = reset($moditem->items);
if (isset($gradeitem->grademax)) {
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$modules[$mod->id] = $sectionlabel . ' ' . $section->section . ' : ' . $instance->name;
}
}
}
}
}
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return $modules;
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}
/**
* Helper function to return all the possible grade formats.
*
* @return array returns an array of grade formats
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*/
public static function get_grade_format_options() {
$gradeformat = array();
$gradeformat[GRADE_DISPLAY_TYPE_REAL] = get_string('gradepoints', 'customcertelement_grade');
$gradeformat[GRADE_DISPLAY_TYPE_PERCENTAGE] = get_string('gradepercent', 'customcertelement_grade');
$gradeformat[GRADE_DISPLAY_TYPE_LETTER] = get_string('gradeletter', 'customcertelement_grade');
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return $gradeformat;
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}
/**
* Helper function to return the grade to display.
*
* @param stdClass $gradeinfo
* @param int $userid
* @return string the grade result
*/
public static function get_grade($gradeinfo, $userid) {
global $COURSE;
// Get the grade information.
$gradeitem = $gradeinfo->gradeitem;
$gradeformat = $gradeinfo->gradeformat;
// Check if we are displaying the course grade.
if ($gradeitem == CUSTOMCERT_GRADE_COURSE) {
if ($courseitem = grade_item::fetch_course_item($COURSE->id)) {
// Set the grade type we want.
$courseitem->gradetype = GRADE_TYPE_VALUE;
$grade = new grade_grade(array('itemid' => $courseitem->id, 'userid' => $userid));
$coursegrade = grade_format_gradevalue($grade->finalgrade, $courseitem, true, $gradeformat, 2);
return $coursegrade;
}
} else { // Get the module grade.
if ($modinfo = self::get_mod_grade($gradeitem, $gradeformat, $userid)) {
return $modinfo->gradetodisplay;
}
}
// Only gets here if no grade was retrieved from the DB.
return '';
}
/**
* Helper function to return the grade the user achieved for a specified module.
*
* @param int $moduleid
* @param int $gradeformat
* @param int $userid
* @return stdClass the grade information
*/
public static function get_mod_grade($moduleid, $gradeformat, $userid) {
global $DB;
$cm = $DB->get_record('course_modules', array('id' => $moduleid), '*', MUST_EXIST);
$module = $DB->get_record('modules', array('id' => $cm->module), '*', MUST_EXIST);
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$gradeitem = grade_get_grades($cm->course, 'mod', $module->name, $cm->instance, $userid);
if (!empty($gradeitem)) {
$item = new grade_item();
$item->gradetype = GRADE_TYPE_VALUE;
$item->courseid = $cm->course;
$itemproperties = reset($gradeitem->items);
foreach ($itemproperties as $key => $value) {
$item->$key = $value;
}
// Grade for the user.
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$grade = $item->grades[$userid]->grade;
// Define how many decimals to display.
$decimals = 2;
if ($gradeformat == GRADE_DISPLAY_TYPE_PERCENTAGE) {
$decimals = 0;
}
// Create the object we will be returning.
$modinfo = new stdClass;
$modinfo->name = $DB->get_field($module->name, 'name', array('id' => $cm->instance));
$modinfo->gradetodisplay = grade_format_gradevalue($grade, $item, true, $gradeformat, $decimals);
if ($grade) {
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$modinfo->dategraded = $item->grades[$userid]->dategraded;
} else {
$modinfo->dategraded = time();
}
return $modinfo;
}
return false;
}
}