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+<?php
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+/**
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+ * This file is part of teacher 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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+ * @package chamilo.dashboard
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+ * @author Christian Fasanando
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+ */
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+
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+/**
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+ * required files for getting data
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+ */
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+require_once api_get_path(LIBRARY_PATH).'usermanager.lib.php';
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+require_once api_get_path(LIBRARY_PATH).'course.lib.php';
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+require_once api_get_path(LIBRARY_PATH).'tracking.lib.php';
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+
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+/**
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+ * This class is used like controller for teacher graph block plugin,
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+ * the class name must be registered inside path.info file (e.g: controller = "BlockTeacherGraph"), so dashboard controller will be instantiate it
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+ * @package chamilo.dashboard
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+ */
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+class BlockTeacherGraph extends Block {
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+
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+ private $user_id;
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+ private $teachers;
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+ private $path;
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+
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+ /**
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+ * Controller
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+ */
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+ public function __construct ($user_id) {
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+ $this->user_id = $user_id;
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+ if (api_is_platform_admin()) {
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+ $this->teachers = UserManager::get_user_list(array('status' => COURSEMANAGER));
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+ } else if (api_is_drh()) {
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+ $this->teachers = UserManager::get_users_followed_by_drh($user_id, COURSEMANAGER);
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+ }
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+ $this->path = 'block_teacher_graph';
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+ }
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+
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+ /**
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+ * This method return content html containing information about teachers and its position for showing it inside dashboard interface
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+ * it's important to use the name 'get_block' for beeing used from dashboard controller
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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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+
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+ $column = 1;
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+ $data = array();
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+
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+ /*if (api_is_platform_admin()) {
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+ $teacher_content_html = $this->get_teachers_content_html_for_platform_admin();
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+ } else if (api_is_drh()) {*/
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+ $teacher_information_graph = $this->get_teachers_information_graph();
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+ //}
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+
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+ $html = '
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+ <li class="widget color-blue" id="intro">
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+ <div class="widget-head">
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+ <h3>'.get_lang('TeachersInformationsGraph').'</h3>
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+ <div class="widget-actions"><a onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'),ENT_QUOTES,$charset)).'\')) return false;" href="index.php?action=disable_block&path='.$this->path.'">'.Display::return_icon('close.gif',get_lang('Close')).'</a></div>
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+ </div>
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+ <div class="widget-content" align="center">
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+ '.$teacher_information_graph.'
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+ </div>
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+ </li>
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+ ';
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+
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+ $data['column'] = $column;
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+ $data['content_html'] = $html;
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+
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+ return $data;
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+
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+ }
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+
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+ /**
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+ * This method return a content html, it's used inside get_block method for showing it inside dashboard interface
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+ * @return string content html
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+ */
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+ public function get_teachers_information_graph() {
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+
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+ $teachers = $this->teachers;
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+ $graph = '';
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+
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+ // get data
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+ $time_on_the_platform = array();
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+ foreach ($teachers as $teacher) {
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+ $teacher_id = $teacher['user_id'];
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+ // get time on platform last week
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+ $time_on_platform_last_week = Tracking :: get_time_spent_on_the_platform($teacher_id,true);
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+ if (!empty($time_on_platform_last_week)) {
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+ $time_on_the_platform[$teacher_id] = $time_on_platform_last_week;
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+ } else {
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+ $time_on_the_platform[$teacher_id] = 0;
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+ }
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+ }
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+
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+ arsort($time_on_the_platform);
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+ // get only until five users
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+ if (count($time_on_the_platform) > 5) { array_splice($time_on_the_platform,5); }
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+
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+ $user_ids = array_keys($time_on_the_platform);
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+ $a_last_week = get_last_week();
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+
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+ if (is_array($user_ids) && count($user_ids) > 0) {
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+ $data_set = new pData;
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+ foreach ($user_ids as $user_id) {
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+ $teacher_info = api_get_user_info($user_id);
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+ $username = $teacher_info['username'];
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+
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+ $time_by_days = array();
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+ foreach ($a_last_week as $day) {
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+ $time_on_platform_by_day = Tracking::get_time_spent_on_the_platform($user_id, false, $day);
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+ $hours = floor($time_on_platform_by_day / 3600);
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+ $min = floor(($time_on_platform_by_day - ($hours * 3600)) / 60);
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+ $time_by_days[] = $min;
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+ }
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+
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+ $data_set->AddPoint($time_by_days,$username);
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+ $data_set->AddSerie($username);
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+
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+ }
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+
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+ $last_week = date('Y-m-d',$a_last_week[0]).' '.get_lang('To').' '.date('Y-m-d', $a_last_week[6]);
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+ foreach ($a_last_week as &$weekday) {
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+ $weekday = date('d/m',$weekday);
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+ }
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+
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+ $data_set->AddPoint($a_last_week,"Days");
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+ $data_set->SetXAxisName($last_week);
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+ $data_set->SetYAxisName(get_lang('Minutes'));
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+
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+ $data_set->SetAbsciseLabelSerie("Days");
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+ $graph_id = $this->user_id.'TeacherConnectionsGraph';
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+
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+ $cache = new pCache();
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+ // the graph id
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+ $data = $data_set->GetData();
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+
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+ if ($cache->IsInCache($graph_id, $data_set->GetData())) {
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+ //if we already created the img
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+ $img_file = $cache->GetHash($graph_id, $data_set->GetData());
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+ } else {
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+
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+ // Initializing the graph
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+ $test = new pChart(400,280);
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+ $test->setFontProperties(api_get_path(LIBRARY_PATH).'pchart/fonts/tahoma.ttf',8);
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+ $test->setGraphArea(65,30,350,200);
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+ $test->drawFilledRoundedRectangle(7,7,393,253,5,240,240,240);
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+ $test->drawRoundedRectangle(5,5,395,255,5,230,230,230);
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+ $test->drawGraphArea(255,255,255,TRUE);
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+ $test->drawScale($data_set->GetData(),$data_set->GetDataDescription(),SCALE_NORMAL,150,150,150,TRUE,0,2,TRUE);
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+ $test->drawGrid(4,TRUE,230,230,230,50);
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+
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+ // Drawing lines
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+ $test->drawLineGraph($data_set->GetData(),$data_set->GetDataDescription());
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+ $test->drawPlotGraph($data_set->GetData(),$data_set->GetDataDescription(),3,2,255,255,255);
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+
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+ // Drawing Legend
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+ $test->setFontProperties(api_get_path(LIBRARY_PATH).'pchart/fonts/tahoma.ttf',8);
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+ $test->drawLegend(320,20,$data_set->GetDataDescription(),204,204,255);
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+
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+ // Drawing title
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+ $test->setFontProperties(api_get_path(LIBRARY_PATH).'pchart/fonts/tahoma.ttf',10);
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+ $test->drawTitle(50,22,get_lang('TimeSpentOnThePlatformLastWeekByDay'),50,50,50,385);
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+
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+ $test->writeValues($data_set->GetData(),$data_set->GetDataDescription(),"Days");
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+
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+ $cache->WriteToCache($graph_id, $data_set->GetData(), $test);
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+ ob_start();
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+ $test->Stroke();
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+ ob_end_clean();
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+ $img_file = $cache->GetHash($graph_id, $data_set->GetData());
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+
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+ }
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+
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+ if (!empty($img_file)) {
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+ $graph = '<img src="'.api_get_path(WEB_ARCHIVE_PATH).$img_file.'">';
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+ }
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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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+
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+ return $graph;
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+
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+ }
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+
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+
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+ /**
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+ * Get number of teachers
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+ * @return int
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+ */
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+ function get_number_of_teachers() {
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+ return count($this->teachers);
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+ }
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+
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+}
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+
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+?>
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