/**
* Generates a big graph with the number of best results
* @param array
*/
static function generate_exercise_result_graph($attempts)
{
$exercise_title = strip_tags($attempts['title']);
$attempts = $attempts['data'];
$my_exercise_result_array = $exercise_result = array();
if (empty($attempts)) {
return null;
}
foreach ($attempts as $attempt) {
if (api_get_user_id() == $attempt['exe_user_id']) {
if ($attempt['exe_weighting'] != 0) {
$my_exercise_result_array[] = $attempt['exe_result'] / $attempt['exe_weighting'];
}
} else {
if ($attempt['exe_weighting'] != 0) {
$exercise_result[] = $attempt['exe_result'] / $attempt['exe_weighting'];
}
}
}
//Getting best result
rsort($my_exercise_result_array);
$my_exercise_result = 0;
if (isset($my_exercise_result_array[0])) {
$my_exercise_result = $my_exercise_result_array[0] * 100;
}
$max = 100;
$pieces = 5;
$part = round($max / $pieces);
$x_axis = array();
$final_array = array();
$my_final_array = array();
for ($i = 1; $i <= $pieces; $i++) {
$sum = 1;
if ($i == 1) {
$sum = 0;
}
$min = ($i - 1) * $part + $sum;
$max = $i * $part;
$x_axis[] = $min . " - " . $max;
$count = 0;
foreach ($exercise_result as $result) {
$percentage = $result * 100;
if ($percentage >= $min && $percentage <= $max) {
$count++;
}
}
$final_array[] = $count;
if ($my_exercise_result >= $min && $my_exercise_result <= $max) {
$my_final_array[] = 1;
} else {
$my_final_array[] = 0;
}
}
//Fix to remove the data of the user with my data
for ($i = 0; $i <= count($my_final_array); $i++) {
if (!empty($my_final_array[$i])) {
$my_final_array[$i] = $final_array[$i] + 1;
//Add my result
$final_array[$i] = 0;
}
}
// Dataset definition
$dataSet = new pData();
$dataSet->addPoints($final_array, 'Serie1');
$dataSet->addPoints($my_final_array, 'Serie2');
$dataSet->addPoints($x_axis, 'Serie3');
$dataSet->setSerieDescription('Serie1', get_lang('Score'));
$dataSet->setSerieDescription('Serie2', get_lang('MyResults'));
$dataSet->setAbscissa('Serie3');
$dataSet->setXAxisName(get_lang('Score'));
$dataSet->normalize(100, "%");
$dataSet->loadPalette(api_get_path(SYS_CODE_PATH) . 'palettes/pchart/default.color', true);
// Cache definition
$cachePath = api_get_path(SYS_ARCHIVE_PATH);
$myCache = new pCache(array('CacheFolder' => substr($cachePath, 0, strlen($cachePath) - 1)));
$chartHash = $myCache->getHash($dataSet);
if ($myCache->isInCache($chartHash)) {
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
} else {
/* Create the pChart object */
$widthSize = 480;
$heightSize = 250;
$fontSize = 8;
$myPicture = new pImage($widthSize, $heightSize, $dataSet);
/* Turn of Antialiasing */
$myPicture->Antialias = false;
/* Add a border to the picture */
$myPicture->drawRectangle(0, 0, $widthSize - 1, $heightSize - 1, array('R' => 0, 'G' => 0, 'B' => 0));
/* Set the default font */
$myPicture->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 10));
/* Write the chart title */
$myPicture->drawText(250, 20, $exercise_title, array('FontSize' => 12, 'Align' => TEXT_ALIGN_BOTTOMMIDDLE));
/* Define the chart area */
$myPicture->setGraphArea(50, 50, $widthSize - 20, $heightSize - 30);
/* Draw the scale */
$scaleSettings = array('GridR' => 200, 'GridG' => 200, 'GridB' => 200, 'DrawSubTicks' => true, 'CycleBackground' => true, 'Mode' => SCALE_MODE_MANUAL, 'ManualScale' => array('0' => array('Min' => 0, 'Max' => 100)));
$myPicture->drawScale($scaleSettings);
/* Turn on shadow computing */
$myPicture->setShadow(true, array('X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10));
/* Draw the chart */
$myPicture->setShadow(true, array('X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10));
$settings = array('DisplayValues' => true, 'DisplaySize' => $fontSize, 'DisplayR' => 0, 'DisplayG' => 0, 'DisplayB' => 0, 'DisplayOrientation' => ORIENTATION_HORIZONTAL, 'Gradient' => false, 'Surrounding' => 30, 'InnerSurrounding' => 25);
$myPicture->drawStackedBarChart($settings);
$legendSettings = array('Mode' => LEGEND_HORIZONTAL, 'Style' => LEGEND_NOBORDER);
$myPicture->drawLegend($widthSize / 2, 30, $legendSettings);
/* Write and save into cache */
$myCache->writeToCache($chartHash, $myPicture);
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
}
return $imgPath;
}
/**
* @return string
*/
public function getGraph()
{
$data = $this->getDataForGraph();
if (!empty($data) && isset($data['categories']) && isset($data['my_result']) && isset($data['average'])) {
$dataSet = new pData();
$dataSet->addPoints($data['my_result'], get_lang('Me'));
// In order to generate random values
// $data['average'] = array(rand(0,50), rand(0,50));
$dataSet->addPoints($data['average'], get_lang('Average'));
$dataSet->addPoints($data['categories'], 'categories');
$dataSet->setAbscissa("categories");
$xSize = 600;
$ySize = 400;
$pChart = new pImage($xSize, $ySize, $dataSet);
/* Turn of Antialiasing */
$pChart->Antialias = FALSE;
/* Add a border to the picture */
$pChart->drawRectangle(0, 0, $xSize - 10, $ySize - 10, array("R" => 0, "G" => 0, "B" => 0));
$pChart->drawText(10, 16, get_lang('Results'), array("FontSize" => 11, "Align" => TEXT_ALIGN_BOTTOMLEFT));
$pChart->setGraphArea(50, 30, $xSize - 50, $ySize - 50);
$pChart->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 10));
/* Draw the scale */
$scaleSettings = array("XMargin" => 10, "YMargin" => 10, "Floating" => true, "GridR" => 200, "GridG" => 200, "GridB" => 200, "DrawSubTicks" => true, "CycleBackground" => true);
$pChart->drawScale($scaleSettings);
/* Draw the line chart */
$pChart->drawLineChart();
$pChart->drawPlotChart(array("DisplayValues" => TRUE, "PlotBorder" => TRUE, "BorderSize" => 2, "Surrounding" => -60, "BorderAlpha" => 80));
/* Write the chart legend */
$pChart->drawLegend($xSize - 180, 9, array("Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL, "FontR" => 0, "FontG" => 0, "FontB" => 0));
$cachePath = api_get_path(SYS_ARCHIVE_PATH);
$myCache = new pCache(array('CacheFolder' => substr($cachePath, 0, strlen($cachePath) - 1)));
$chartHash = $myCache->getHash($dataSet);
$myCache->writeToCache($chartHash, $pChart);
$imgSysPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgSysPath);
$imgWebPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
if (file_exists($imgSysPath)) {
$result = '<div id="contentArea" style="text-align: center;" >';
$result .= '<img src="' . $imgWebPath . '" >';
$result .= '</div>';
return $result;
}
}
return '';
}
/**
* This method return a graph containing information about evaluations
* inside courses in sessions, it's used inside get_block method for
* showing it inside dashboard interface
* @return string img html
*/
public function get_evaluations_courses_in_sessions_graph()
{
$graphs = array();
if (!empty($this->sessions)) {
$session_ids = array_keys($this->sessions);
foreach ($session_ids as $session_id) {
$courses_code = array_keys(Tracking::get_courses_list_from_session($session_id));
$courses_graph = array();
foreach ($courses_code as $course_code) {
$cats = Category::load(null, null, $course_code, null, null, $session_id);
if (isset($cats) && isset($cats[0])) {
$alleval = $cats[0]->get_evaluations(null, true, $course_code);
$alllinks = $cats[0]->get_links(null, true);
$users = GradebookUtils::get_all_users($alleval, $alllinks);
$datagen = new FlatViewDataGenerator($users, $alleval, $alllinks);
$evaluation_sumary = $datagen->get_evaluation_sumary_results();
if (!empty($evaluation_sumary)) {
$items = array_keys($evaluation_sumary);
$max = $min = $avg = array();
foreach ($evaluation_sumary as $evaluation) {
$max[] = $evaluation['max'];
$min[] = $evaluation['min'];
$avg[] = $evaluation['avg'];
}
// Dataset definition
$dataSet = new pData();
$dataSet->addPoints($min, 'Serie3');
$dataSet->addPoints($avg, 'Serie2');
$dataSet->addPoints($max, 'Serie1');
$dataSet->addPoints($items, 'Labels');
$dataSet->setSerieDescription('Serie1', get_lang('Max'));
$dataSet->setSerieDescription('Serie2', get_lang('Avg'));
$dataSet->setSerieDescription('Serie3', get_lang('Min'));
$dataSet->setAbscissa('Labels');
$dataSet->setAbscissaName(get_lang('EvaluationName'));
$dataSet->normalize(100, '%');
$dataSet->loadPalette(api_get_path(SYS_CODE_PATH) . 'palettes/pchart/default.color', true);
// Cache definition
$cachePath = api_get_path(SYS_ARCHIVE_PATH);
$myCache = new pCache(array('CacheFolder' => substr($cachePath, 0, strlen($cachePath) - 1)));
$chartHash = $myCache->getHash($dataSet);
if ($myCache->isInCache($chartHash)) {
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
} else {
/* Create the pChart object */
$widthSize = $this->bg_width;
$heightSize = $this->bg_height;
$fontSize = 8;
$angle = 50;
$myPicture = new pImage($widthSize, $heightSize, $dataSet);
/* Turn of Antialiasing */
$myPicture->Antialias = false;
/* Add a border to the picture */
$myPicture->drawRectangle(0, 0, $widthSize - 1, $heightSize - 1, array('R' => 0, 'G' => 0, 'B' => 0));
/* Set the default font */
$myPicture->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 10));
/* Do NOT Write the chart title */
/* Define the chart area */
$myPicture->setGraphArea(50, 30, $widthSize - 20, $heightSize - 100);
/* Draw the scale */
$scaleSettings = array('GridR' => 200, 'GridG' => 200, 'GridB' => 200, 'DrawSubTicks' => true, 'CycleBackground' => true, 'Mode' => SCALE_MODE_MANUAL, 'ManualScale' => array('0' => array('Min' => 0, 'Max' => 100)), 'LabelRotation' => $angle);
$myPicture->drawScale($scaleSettings);
/* Turn on shadow computing */
$myPicture->setShadow(true, array('X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10));
/* Draw the chart */
$myPicture->setShadow(true, array('X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10));
$settings = array('DisplayValues' => true, 'DisplaySize' => $fontSize, 'DisplayR' => 0, 'DisplayG' => 0, 'DisplayB' => 0, 'DisplayOrientation' => ORIENTATION_HORIZONTAL, 'Gradient' => false, 'Surrounding' => 30, 'InnerSurrounding' => 25);
$myPicture->drawStackedBarChart($settings);
$legendSettings = array('Mode' => LEGEND_HORIZONTAL, 'Style' => LEGEND_NOBORDER);
$myPicture->drawLegend($widthSize / 2, 15, $legendSettings);
/* Write and save into cache */
$myCache->writeToCache($chartHash, $myPicture);
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
}
if (!empty($imgPath)) {
$courses_graph[$course_code] = '<img src="' . $imgPath . '">';
}
}
}
}
if (!empty($courses_graph)) {
$graphs[$session_id] = $courses_graph;
}
}
}
return $graphs;
}
/**
* This method return a content html, it's used inside get_block method for showing it inside dashboard interface
* @return string content html
*/
public function get_teachers_information_graph()
{
$teachers = $this->teachers;
$graph = '';
$user_ids = array_keys($teachers);
$a_last_week = get_last_week();
if (is_array($user_ids) && count($user_ids) > 0) {
$dataSet = new pData();
foreach ($user_ids as $user_id) {
$teacher_info = api_get_user_info($user_id);
$username = $teacher_info['username'];
$time_by_days = array();
foreach ($a_last_week as $day) {
// day is received as y-m-d 12:00:00
$start_date = api_get_utc_datetime($day);
$end_date = api_get_utc_datetime($day + (3600 * 24 - 1));
$time_on_platform_by_day = Tracking::get_time_spent_on_the_platform($user_id, 'custom', $start_date, $end_date);
$hours = floor($time_on_platform_by_day / 3600);
$min = floor(($time_on_platform_by_day - $hours * 3600) / 60);
$time_by_days[] = $min;
}
$dataSet->addPoints($time_by_days, $username);
}
$last_week = date('Y-m-d', $a_last_week[0]) . ' ' . get_lang('To') . ' ' . date('Y-m-d', $a_last_week[6]);
$days_on_week = array();
foreach ($a_last_week as $weekday) {
$days_on_week[] = date('d/m', $weekday);
}
$dataSet->addPoints($days_on_week, 'Days');
$dataSet->setAbscissaName($last_week);
$dataSet->setAxisName(0, get_lang('Minutes'));
$dataSet->setAbscissa('Days');
$dataSet->loadPalette(api_get_path(SYS_CODE_PATH) . 'palettes/pchart/default.color', true);
// Cache definition
$cachePath = api_get_path(SYS_ARCHIVE_PATH);
$myCache = new pCache(array('CacheFolder' => substr($cachePath, 0, strlen($cachePath) - 1)));
$chartHash = $myCache->getHash($dataSet);
if ($myCache->isInCache($chartHash)) {
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
} else {
/* Create the pChart object */
$widthSize = 440;
$heightSize = 350;
$angle = 50;
$myPicture = new pImage($widthSize, $heightSize, $dataSet);
/* Turn of Antialiasing */
$myPicture->Antialias = false;
/* Add a border to the picture */
$myPicture->drawRectangle(0, 0, $widthSize - 1, $heightSize - 1, array('R' => 0, 'G' => 0, 'B' => 0));
/* Set the default font */
$myPicture->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 10));
/* Do NOT Write the chart title */
/* Define the chart area */
$myPicture->setGraphArea(40, 40, $widthSize - 20, $heightSize - 80);
/* Draw the scale */
$scaleSettings = array('GridR' => 200, 'GridG' => 200, 'GridB' => 200, 'DrawSubTicks' => true, 'CycleBackground' => true, 'Mode' => SCALE_MODE_ADDALL_START0, 'LabelRotation' => $angle);
$myPicture->drawScale($scaleSettings);
/* Turn on shadow computing */
$myPicture->setShadow(true, array('X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10));
/* Draw the chart */
$myPicture->setShadow(true, array('X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10));
$settings = array('DisplayValues' => true, 'DisplayR' => 0, 'DisplayG' => 0, 'DisplayB' => 0);
$myPicture->drawFilledSplineChart($settings);
$myPicture->drawLegend(40, 20, array('Mode' => LEGEND_HORIZONTAL));
/* Write and save into cache */
$myCache->writeToCache($chartHash, $myPicture);
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
}
$graph = '<img src="' . $imgPath . '" >';
} else {
$graph = '<p>' . api_convert_encoding(get_lang('GraphicNotAvailable'), 'UTF-8') . '</p>';
}
return $graph;
}