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<?php
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/* For licensing terms, see /license.txt */
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/**
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* This file is part of student graph block plugin for dashboard,
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* it should be required inside dashboard controller for showing it into dashboard interface from plattform.
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*
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* @package chamilo.dashboard
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*
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* @author Christian Fasanando
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* @author Julio Montoya <gugli100@gmail.com>
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*/
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use CpChart\Cache as pCache;
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use CpChart\Data as pData;
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use CpChart\Image as pImage;
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/**
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* This class is used like controller for student graph block plugin,
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* the class name must be registered inside path.info file
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* (e.g: controller = "BlockStudentGraph"), so dashboard controller will be instantiate it.
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*
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* @package chamilo.dashboard
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*/
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class BlockStudentGraph extends Block
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{
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private $user_id;
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private $students;
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private $path;
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private $permission = [DRH];
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/**
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* Constructor.
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*/
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public function __construct($user_id)
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{
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$this->user_id = $user_id;
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$this->path = 'block_student_graph';
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if ($this->is_block_visible_for_user($user_id)) {
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/*if (api_is_platform_admin()) {
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$this->students = UserManager::get_user_list(array('status' => STUDENT));
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} else if (api_is_drh()) {*/
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$this->students = UserManager::get_users_followed_by_drh($user_id, STUDENT);
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//}
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}
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}
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/**
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* This method check if a user is allowed to see the block inside dashboard interface.
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*
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* @param int User id
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*
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* @return bool Is block visible for user
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*/
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public function is_block_visible_for_user($user_id)
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{
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$user_info = api_get_user_info($user_id);
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$user_status = $user_info['status'];
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$is_block_visible_for_user = false;
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if (UserManager::is_admin($user_id) || in_array($user_status, $this->permission)) {
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$is_block_visible_for_user = true;
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}
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return $is_block_visible_for_user;
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}
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/**
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* This method return content html containing information about students
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* and its position for showing it inside dashboard interface
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* it's important to use the name 'get_block' for being used from dashboard controller.
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*
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* @return array column and content html
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*/
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public function get_block()
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{
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global $charset;
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$column = 1;
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$data = [];
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$students_attendance_graph = $this->get_students_attendance_graph();
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$html = '<div class="panel panel-default" id="intro">
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<div class="panel-heading">
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'.get_lang('StudentsInformationsGraph').'
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<div class="pull-right"><a class="btn btn-danger btn-xs" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'), ENT_QUOTES, $charset)).'\')) return false;" href="index.php?action=disable_block&path='.$this->path.'">
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<em class="fa fa-times"></em>
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</a></div>
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</div>
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<div class="panel-body" align="center">
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<div style="padding:10px;"><strong>'.get_lang('AttendancesFaults').'</strong></div>
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'.$students_attendance_graph.'
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</div>
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</div>';
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$data['column'] = $column;
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$data['content_html'] = $html;
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return $data;
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}
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/**
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* This method return a graph containing information about students evaluation,
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* it's used inside get_block method for showing it inside dashboard interface.
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*
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* @return string img html
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*/
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public function get_students_attendance_graph()
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{
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$students = $this->students;
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$attendance = new Attendance();
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// get data
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$attendances_faults_avg = [];
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if (is_array($students) && count($students) > 0) {
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foreach ($students as $student) {
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$student_id = $student['user_id'];
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//$student_info = api_get_user_info($student_id);
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// get average of faults in attendances by student
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$results_faults_avg = $attendance->get_faults_average_inside_courses($student_id);
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if (!empty($results_faults_avg)) {
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$attendances_faults_avg[$student['lastname']] = $results_faults_avg['porcent'];
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} else {
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$attendances_faults_avg[$student['lastname']] = 0;
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}
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}
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}
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arsort($attendances_faults_avg);
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$usernames = array_keys($attendances_faults_avg);
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$faults = [];
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foreach ($usernames as $username) {
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$faults[] = $attendances_faults_avg[$username];
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}
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$graph = '';
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$img_file = '';
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if (is_array($usernames) && count($usernames) > 0) {
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// Defining data
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$dataSet = new pData();
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$dataSet->addPoints($faults, 'Serie1');
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$dataSet->addPoints($usernames, 'Labels');
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$dataSet->setSerieDescription('Series1', get_lang('Average'));
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$dataSet->setSerieDescription('Labels', get_lang('User'));
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$dataSet->setAbscissa('Labels');
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$dataSet->setAbscissaName(get_lang('User'));
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$dataSet->setAxisName(0, get_lang('Attendance'));
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$palette = [
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'0' => ['R' => 186, 'G' => 206, 'B' => 151, 'Alpha' => 100],
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'1' => ['R' => 210, 'G' => 148, 'B' => 147, 'Alpha' => 100],
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'2' => ['R' => 148, 'G' => 170, 'B' => 208, 'Alpha' => 100],
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'3' => ['R' => 221, 'G' => 133, 'B' => 61, 'Alpha' => 100],
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'4' => ['R' => 65, 'G' => 153, 'B' => 176, 'Alpha' => 100],
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'5' => ['R' => 114, 'G' => 88, 'B' => 144, 'Alpha' => 100],
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'6' => ['R' => 138, 'G' => 166, 'B' => 78, 'Alpha' => 100],
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'7' => ['R' => 171, 'G' => 70, 'B' => 67, 'Alpha' => 100],
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'8' => ['R' => 69, 'G' => 115, 'B' => 168, 'Alpha' => 100],
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];
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// Cache definition
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$cachePath = api_get_path(SYS_ARCHIVE_PATH);
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$myCache = new pCache(
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[
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'CacheFolder' => substr(
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$cachePath,
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0,
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strlen($cachePath) - 1
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),
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]
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);
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$chartHash = $myCache->getHash($dataSet);
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if ($myCache->isInCache($chartHash)) {
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$imgPath = api_get_path(SYS_ARCHIVE_PATH).$chartHash;
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$myCache->saveFromCache($chartHash, $imgPath);
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$imgPath = api_get_path(WEB_ARCHIVE_PATH).$chartHash;
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} else {
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$maxCounts = max(count($usernames), count($faults));
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if ($maxCounts < 5) {
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$heightSize = 200;
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} else {
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$heightSize = $maxCounts * 40;
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}
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/* Create the pChart object */
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$widthSize = 480;
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$angle = 40;
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$myPicture = new pImage($widthSize, $heightSize, $dataSet);
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/* Turn of Antialiasing */
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$myPicture->Antialias = false;
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/* Add a border to the picture */
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$myPicture->drawRectangle(0, 0, $widthSize - 1, $heightSize - 1, ['R' => 0, 'G' => 0, 'B' => 0]);
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/* Set the default font */
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$myPicture->setFontProperties(
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[
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'FontName' => api_get_path(SYS_FONTS_PATH).'opensans/OpenSans-Regular.ttf',
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'FontSize' => 10,
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]
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);
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/* Do NOT Write the chart title */
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/* Define the chart area */
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$myPicture->setGraphArea(80, 40, $widthSize - 20, $heightSize - 40);
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/* Draw the scale */
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$scaleSettings = [
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'GridR' => 200,
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'GridG' => 200,
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'GridB' => 200,
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'DrawSubTicks' => true,
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'CycleBackground' => true,
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'Mode' => SCALE_MODE_ADDALL_START0,
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'Pos' => SCALE_POS_TOPBOTTOM,
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'DrawXLines' => false,
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'LabelRotation' => $angle,
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];
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$myPicture->drawScale($scaleSettings);
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/* Turn on shadow computing */
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$myPicture->setShadow(true, ['X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10]);
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/* Draw the chart */
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$myPicture->setShadow(true, ['X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10]);
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$settings = [
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'OverrideColors' => $palette,
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'Gradient' => false,
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'GradientMode' => GRADIENT_SIMPLE,
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'DisplayPos' => LABEL_POS_TOP,
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'DisplayValues' => true,
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'DisplayR' => 0,
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'DisplayG' => 0,
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'DisplayB' => 0,
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'DisplayShadow' => true,
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'Surrounding' => 10,
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];
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$myPicture->drawBarChart($settings);
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/* Write and save into cache */
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$myCache->writeToCache($chartHash, $myPicture);
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$imgPath = api_get_path(SYS_ARCHIVE_PATH).$chartHash;
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$myCache->saveFromCache($chartHash, $imgPath);
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$imgPath = api_get_path(WEB_ARCHIVE_PATH).$chartHash;
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}
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$graph = '<img src="'.$imgPath.'" >';
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} else {
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$graph = '<p>'.api_convert_encoding(get_lang('GraphicNotAvailable'), 'UTF-8').'</p>';
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}
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return $graph;
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}
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/**
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* Get number of students.
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*
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* @return int
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*/
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public function get_number_of_students()
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{
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return count($this->students);
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}
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}
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Block a user