494 lines
12 KiB
PHP
494 lines
12 KiB
PHP
<?php
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require_once($CFG->libdir.'/gradelib.php');
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require_once($CFG->dirroot.'/grade/querylib.php');
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//namespace block_gradelevel;
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class block_gradelevel_levelset {
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const UNDEFINED_BADGE_COLOR="#3F3F3F";
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const NULL_BADGE_COLOR = "#000000";
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const DEFAULT_ICON = "/blocks/gradelevel/pix/undefinedskill.svg";
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const GLOBAL_DEFAULTS = array(
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0 => "#000000",
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250 => "#2ad4ff", // + 250
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750 => "#cd7f32", // + 500
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1750 => "#a6a6a6", // + 1000
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2750 => "#f6ae00", // + 2000
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);
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private $id;
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private $data;
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private $levels = null;
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private $global_levels = null;
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/**
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* Construct a levelset object for an existing database item
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*
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*/
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private function __construct($id = null, $dataObject = null)
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{
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global $DB;
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$this->id = $id;
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if($id != null)
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{
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if(isset($dataObject) && isset($dataObject->id) && $dataObject->id == $id) // slight sanity check
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{
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$this->data = $dataObject;
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}
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else {
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// database validity check went south, retrieve again
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$this->data = $DB->get_record('block_gradelevel_levelset', array('id' => $this->id));
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}
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//retrieve levels for this levelset
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$this->levels = $DB->get_records('block_gradelevel_levels', array('levelset_id' => $this->id));
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usort( $this->levels, function( $a, $b) {
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return ( $a->points < $b->points ) ? -1 : 1;
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} );
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}
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// retrieve global levels
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$this->global_levels = $DB->get_records('block_gradelevel_levels', array('levelset_id' => 0));
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usort( $this->global_levels, function( $a, $b) {
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return ( $a->points < $b->points ) ? -1 : 1;
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} );
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// if no global levels are defined, insert default global levels
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if(count($this->global_levels) == 0)
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{
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foreach(static::GLOBAL_DEFAULTS as $points => $color)
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{
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// setup default
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$row = new stdClass;
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$row->levelset_id = 0;
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$row->points = $points;
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$row->badgecolor = $color;
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// insert into db
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if(!$DB->insert_record('block_gradelevel_levels',$row)){
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print_error('inserterror', 'block_gradelevel');
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}
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}
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// and reload global levels;
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$this->global_levels = $DB->get_records('block_gradelevel_levels', array('levelset_id' => 0));
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usort( $this->global_levels, function( $a, $b) {
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return ( $a->points < $b->points ) ? -1 : 1;
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} );
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}
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}
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public function getId() : string
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{
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return $this->id;
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}
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public function setName(string $name)
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{
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$this->data->name = $name;
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}
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public function getName() : string
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{
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return $this->data->name;
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}
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public function setIcon(string $iconname)
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{
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$this->data->icon = $iconname;
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}
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public function getIcon() : string
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{
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$icon = $this->data->icon;
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if(empty($icon))
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{
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$icon = static::DEFAULT_ICON;
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}
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return $icon;
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}
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/**
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* Find a levelset for a given course
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*
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* @params int $course_id The id of the course to find a levelset for
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* @return levelset The levelset for this course or null if none found;
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*/
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static public function find_by_course($course_id)
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{
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global $DB;
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// FIXME: Make this more efficient by joining it into one sql statement.
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$records = $DB->get_records('block_gradelevel_course_link', array('course_id' => $course_id));
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if(count($records) > 0)
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{
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$levelset = $DB->get_record('block_gradelevel_levelset', array('id' => array_values($records)[0]->levelset_id));
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if($levelset)
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{
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return new static($levelset->id,$levelset);
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}
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}
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return null; // return null if no current levelset linked
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}
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static public function find_by_id($id)
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{
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$levelset = $DB->get_record('block_gradelevel_levelset', array('id' => array_values($records)[0]->levelset_id));
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if($levelset)
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{
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return new static($levelset->id,$levelset);
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}
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else
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{
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return null;
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}
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}
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/**
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* List attached courses for this levelset
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*
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* @return array An array with the id's of attached courses
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*/
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public function list_courses()
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{
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global $DB;
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$list = array();
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$links = $DB->get_records('block_gradelevel_course_link', array('levelset_id' => $this->id));
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foreach($links as $link)
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{
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$list[] = $link->course_id;
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}
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return $list;
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}
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/**
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* Attach a course to this levelset. The course will be detached from any other levelsets.
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*
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* @params int $course_id The id of the course to attach
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*/
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public function attach_course($course_id)
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{
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global $DB;
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// check if course attachement is already done
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if(!in_array($course_id,$this->list_courses))
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{
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// no, now find an existing attachment for this course
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$rows = $DB->get_records('block_gradelevel_course_link', array('course_id' => $course_id));
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if(empty($rows))
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{
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// create new attachment if existing link was not found
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$row = new stdClass;
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$row->levelset_id = $this->id;
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$row->course_id = $course_id;
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// insert new row
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if(!$DB->insert_record('block_gradelevel_course_link',$row)){
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print_error('inserterror', 'block_gradelevel');
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}
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}
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else
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{
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// update existing link (automatically detaches course from its previous levelset)
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$row = array_values($rows)[0];
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$row->course_id = $course_id;
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// update existing row
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if(!$DB->update_record('block_gradelevel_course_link',$row)){
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print_error('updateerror', 'block_gradelevel');
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}
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}
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}
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}
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/**
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* Detache a course from this levelset.
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*
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* @params int $course_id The id of the course to detach
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*/
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public function detach_course($course_id)
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{
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global $DB;
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$rows = $DB->get_records('block_gradelevel_course_link', array('course_id' => $course_id, 'levelset_id' => $this->id));
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if(!empty($rows))
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{
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if(!$DB->delete_records('block_gradelevel_course_link', array('id' => array_values($rows)[0]->id)))
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{
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print_error('deleteerror','block_gradelevel');
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}
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}
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}
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/**
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* Store changes made to the levelset data parameter containing levelset data
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*
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*/
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public function save_data()
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{
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global $DB;
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if($this->data->id == $this->id) // sanity check so we don't kill everything
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{
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if(!$DB->update_record('block_gradelevel_levelset',$this->data)){
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print_error('updateerror', 'block_gradelevel');
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error_log('UPDATE-ERROR\n', 3, '/tmp/moodledevlog.log');
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}
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}
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else
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{
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print_error('datarowchanged_error', 'block_gradelevel');
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error_log('DATAROW-INVALID\n', 3, '/tmp/moodledevlog.log');
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}
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}
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/**
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* Retrieve point total for all attached courses for a given user
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*
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* @param int $user_id The id
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* @return int Total points for this user in this levelset
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*/
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public function get_levelset_grade($user_id)
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{
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// loop through all attached courses and add up the grade points gathered
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$points = 0;
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foreach($this->list_courses() as $course_id)
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{
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$result = grade_get_course_grade($user_id,$course_id);
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$points += $result->grade;
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}
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return $points;
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}
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/**
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* Return the levelup data for a given userid in this levelset
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*
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* @param int $user_id The id
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* @return stdClass A stdClass containing the level data for the specified number of point
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*/
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public function get_user_leveldata($user_id)
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{
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$points = $this->get_levelset_grade($user_id);
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return $this->calculate_level($points);
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}
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/**
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* Create a new levelset
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*
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* @params string $name Optional name of the new levelset
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* @return levelset The new levelset
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*/
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static public function create_new($name="New levelset")
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{
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global $DB;
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// create a new levelset
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$row = new stdClass;
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$row->name = $name;
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if(!$id = $DB->insert_record('block_gradelevel_levelset',$row, true)){
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print_error('inserterror', 'block_gradelevel');
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}
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else
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{
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$rows = $DB->get_records('block_gradelevel_levelset', array('id' => $id));
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if(count($rows) > 0)
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{
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return new static($id,array_values($rows)[0]);
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}
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}
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throw new RuntimeException("Could not create new levelset");
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}
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/**
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* List all levelsets
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*
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* @return array Array of levelset
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*/
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static public function list_all()
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{
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global $DB;
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$list = array();
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$levelsets = $DB->get_records('block_gradelevel_levelset');
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foreach($levelsets as $lset)
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{
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$list[] = new static($lset->id,$lset);
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}
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return $list;
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}
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/**
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* Calculate the levelup data, given a specified set of points
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*
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* @params int points The amount of points to calculate for
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* @return stdClass A stdClass containing the level data for the specified number of point
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*/
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public function calculate_level($points){
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$levels = $this->badgelevels($levelset_id);
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$level = 0;
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$badge_color = static::NULL_BADGE_COLOR;
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$current_at = 0;
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$next_at = 0;
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foreach($levels as $threshold => $badgeColor)
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{
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if($points >= $threshold){
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$level++;
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$badge_color = $badgeColor;
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$current_at = $threshold;
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}
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else
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{
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$next_at = $threshold;
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break;
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}
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}
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$levelup_points = $next_at - $current_at;
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$points_in_level = $points - $current_at;
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if($levelup_points == 0){ // at max level
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$progress = 0;
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$points_in_level = 0;
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}
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else
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{
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$progress = $points_in_level / $levelup_points;
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}
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$result = new stdClass;
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$result->level = $level;
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$result->badge_color = $badge_color;
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$result->progress = $progress;
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$result->next_at = $next_at;
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$result->levelup_total = $levelup_points;
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$result->points_in_level = $points_in_level;
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return $result;
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}
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/**
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* Simplified list of levels and associated badge colors for this levelset
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* Takes data from global levelset if more specialized data is not set
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*
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* @return array An array of points (keys) and badge color (values), sorted by level
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*/
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public function badgelevels()
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{
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$level_info = array();
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// If we have levels defined, use those, otherwise use the global levels
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if(!empty($this->levels))
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{
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print ("EXSTING_LEVELS");
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if(array_values($this->levels)[0]->points > 0)
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{
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// insert level 0
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$level_info[0] = static::NULL_BADGE_COLOR;
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}
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$i = 0;
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foreach($this->levels as $lvl)
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{
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// Check if color is properly set or needs to be retrieved from global config
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if(!empty($lvl->badgecolor)) {
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$color = $lvl->badgecolor;
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}
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elseif(isset($this->global_levels[$i]))
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{
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$color = $this->global_levels[$i]->badgecolor;
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}
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else
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{
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$color = static::UNDEFINED_BADGE_COLOR;
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}
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$level_info[$lvl->points];
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}
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}
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else
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{
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if(empty($this->global_levels) || array_values($this->global_levels)[0]->points > 0)
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{
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// insert level 1 if levels don't start at 0 points,
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// or if no global levels are defined. - At least start somewhere...
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$level_info[0] = static::NULL_BADGE_COLOR;
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}
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// use global levels if levelset is not defined.
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foreach($this->global_levels as $lvl)
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{
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// Check if color is properly set
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if(!empty($lvl->badgecolor)) {
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$color = $lvl->badgecolor;
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}
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else
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{
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$color = static::UNDEFINED_BADGE_COLOR;
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}
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$level_info[$lvl->points] = $color;
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}
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}
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return $level_info;
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}
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public function render_badge(int $points,int $size=150){
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global $CFG;
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$info = $this->calculate_level($points);
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$image = $this->getIcon();
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if(strncmp($image,"data: ",6) != 0)
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{
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$image_url = $CFG->wwwroot.$image;
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}
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else
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{
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$image_url = $image;
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}
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$html = "<figure class='levelbadge'";
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$html .= " data-color='{$info->badge_color}'";
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$html .= " data-progress='{$info->progress}'";
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$html .= " data-level='{$info->level}'";
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$html .= " data-width='{$size}'";
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$html .= " data-height='{$size}'";
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$html .= ">";
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if(!empty($image))
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{
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$html .= "<img style='display:none' src='{$image_url}' />";
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}
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$html .= "</figure>";
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return $html;
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}
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public function render_demo_badge(int $size=100)
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{
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$levels = $this->badgelevels();
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$maxpoints = array_pop(array_keys($levels));
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return $this->render_badge($maxpoints,$size);
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}
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} |