/**
* Display gradebook graphs
*/
public function display_graph_by_resource()
{
$headerName = $this->datagen->get_header_names();
$total_users = $this->datagen->get_total_users_count();
$displayscore = ScoreDisplay::instance();
$customdisplays = $displayscore->get_custom_score_display_settings();
if (empty($customdisplays)) {
echo get_lang('ToViewGraphScoreRuleMustBeEnabled');
return '';
}
$user_results = $this->datagen->get_data_to_graph2(false);
//if (empty($this->datagen->get_total_items_count()) || empty($total_users)) {
if (empty($user_results) || empty($total_users)) {
echo get_lang('NoResults');
return '';
}
// Removing first name
array_shift($headerName);
// Removing last name
array_shift($headerName);
$pre_result = $new_result = array();
foreach ($user_results as $result) {
for ($i = 0; $i < count($headerName); $i++) {
if (isset($result[$i + 1])) {
$pre_result[$i + 3][] = $result[$i + 1];
}
}
}
$i = 0;
$show_draw = false;
$resource_list = array();
$pre_result2 = array();
foreach ($pre_result as $key => $res_array) {
rsort($res_array);
$pre_result2[] = $res_array;
}
//@todo when a display custom does not exist the order of the color does not match
//filling all the answer that are not responded with 0
rsort($customdisplays);
if ($total_users > 0) {
foreach ($pre_result2 as $key => $res_array) {
$key_list = array();
foreach ($res_array as $user_result) {
$userResult = isset($user_result[1]) ? $user_result[1] : null;
if (!isset($resource_list[$key][$userResult])) {
$resource_list[$key][$userResult] = 0;
}
$resource_list[$key][$userResult] += 1;
$key_list[] = $userResult;
}
foreach ($customdisplays as $display) {
if (!in_array($display['display'], $key_list)) {
$resource_list[$key][$display['display']] = 0;
}
}
$i++;
}
}
//fixing $resource_list
$max = 0;
$new_list = array();
foreach ($resource_list as $key => $value) {
$new_value = array();
foreach ($customdisplays as $item) {
if ($value[$item['display']] > $max) {
$max = $value[$item['display']];
}
$new_value[$item['display']] = strip_tags($value[$item['display']]);
}
$new_list[] = $new_value;
}
$resource_list = $new_list;
$i = 1;
foreach ($resource_list as $key => $resource) {
// Reverse array, otherwise we get highest values first
$resource = array_reverse($resource, true);
$dataSet = new pData();
$dataSet->addPoints($resource, 'Serie');
$dataSet->addPoints(array_keys($resource), 'Labels');
$dataSet->setSerieDescription('Labels', strip_tags($headerName[$i - 1]));
$dataSet->setAbscissa('Labels');
$dataSet->setAbscissaName(get_lang('GradebookSkillsRanking'));
$dataSet->setAxisName(0, get_lang('Students'));
$palette = array('0' => array('R' => 186, 'G' => 206, 'B' => 151, 'Alpha' => 100), '1' => array('R' => 210, 'G' => 148, 'B' => 147, 'Alpha' => 100), '2' => array('R' => 148, 'G' => 170, 'B' => 208, 'Alpha' => 100), '3' => array('R' => 221, 'G' => 133, 'B' => 61, 'Alpha' => 100), '4' => array('R' => 65, 'G' => 153, 'B' => 176, 'Alpha' => 100), '5' => array('R' => 114, 'G' => 88, 'B' => 144, 'Alpha' => 100), '6' => array('R' => 138, 'G' => 166, 'B' => 78, 'Alpha' => 100), '7' => array('R' => 171, 'G' => 70, 'B' => 67, 'Alpha' => 100), '8' => array('R' => 69, 'G' => 115, 'B' => 168, 'Alpha' => 100));
// 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;
$myPicture = new pImage($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 */
$myPicture->drawText(250, 30, strip_tags($headerName[$i - 1]), array('FontSize' => 12, 'Align' => TEXT_ALIGN_BOTTOMMIDDLE));
/* Define the chart area */
$myPicture->setGraphArea(50, 40, $widthSize - 20, $heightSize - 50);
/* Draw the scale */
$scaleSettings = array('GridR' => 200, 'GridG' => 200, 'GridB' => 200, 'DrawSubTicks' => true, 'CycleBackground' => true, 'Mode' => SCALE_MODE_START0);
$myPicture->drawScale($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('OverrideColors' => $palette, 'Gradient' => false, 'GradientMode' => GRADIENT_SIMPLE, 'DisplayPos' => LABEL_POS_TOP, 'DisplayValues' => true, 'DisplayR' => 0, 'DisplayG' => 0, 'DisplayB' => 0, 'DisplayShadow' => true, 'Surrounding' => 10);
$myPicture->drawBarChart($settings);
/* Render the picture (choose the best way) */
$myCache->writeToCache($chartHash, $myPicture);
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
}
echo '<img src="' . $imgPath . '" >';
if ($i % 2 == 0 && $i != 0) {
echo '<br /><br />';
} else {
echo ' ';
}
$i++;
}
}
/**
* This method return a graph containing information about students evaluation,
* it's used inside get_block method for showing it inside dashboard interface
* @return string img html
*/
public function get_students_attendance_graph()
{
$students = $this->students;
$attendance = new Attendance();
// get data
$attendances_faults_avg = array();
if (is_array($students) && count($students) > 0) {
foreach ($students as $student) {
$student_id = $student['user_id'];
//$student_info = api_get_user_info($student_id);
// get average of faults in attendances by student
$results_faults_avg = $attendance->get_faults_average_inside_courses($student_id);
if (!empty($results_faults_avg)) {
$attendances_faults_avg[$student['lastname']] = $results_faults_avg['porcent'];
} else {
$attendances_faults_avg[$student['lastname']] = 0;
}
}
}
arsort($attendances_faults_avg);
$usernames = array_keys($attendances_faults_avg);
$faults = array();
foreach ($usernames as $username) {
$faults[] = $attendances_faults_avg[$username];
}
$graph = '';
$img_file = '';
if (is_array($usernames) && count($usernames) > 0) {
// Defining data
$dataSet = new pData();
$dataSet->addPoints($faults, 'Serie1');
$dataSet->addPoints($usernames, 'Labels');
$dataSet->setSerieDescription('Series1', get_lang('Average'));
$dataSet->setSerieDescription('Labels', get_lang('User'));
$dataSet->setAbscissa('Labels');
$dataSet->setAbscissaName(get_lang('User'));
$dataSet->setAxisName(0, get_lang('Attendance'));
$palette = array('0' => array('R' => 186, 'G' => 206, 'B' => 151, 'Alpha' => 100), '1' => array('R' => 210, 'G' => 148, 'B' => 147, 'Alpha' => 100), '2' => array('R' => 148, 'G' => 170, 'B' => 208, 'Alpha' => 100), '3' => array('R' => 221, 'G' => 133, 'B' => 61, 'Alpha' => 100), '4' => array('R' => 65, 'G' => 153, 'B' => 176, 'Alpha' => 100), '5' => array('R' => 114, 'G' => 88, 'B' => 144, 'Alpha' => 100), '6' => array('R' => 138, 'G' => 166, 'B' => 78, 'Alpha' => 100), '7' => array('R' => 171, 'G' => 70, 'B' => 67, 'Alpha' => 100), '8' => array('R' => 69, 'G' => 115, 'B' => 168, 'Alpha' => 100));
// 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 {
$maxCounts = max(count($usernames), count($faults));
if ($maxCounts < 5) {
$heightSize = 200;
} else {
$heightSize = $maxCounts * 40;
}
/* Create the pChart object */
$widthSize = 480;
$angle = 40;
$myPicture = new pImage($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(80, 40, $widthSize - 20, $heightSize - 40);
/* Draw the scale */
$scaleSettings = array('GridR' => 200, 'GridG' => 200, 'GridB' => 200, 'DrawSubTicks' => true, 'CycleBackground' => true, 'Mode' => SCALE_MODE_ADDALL_START0, 'Pos' => SCALE_POS_TOPBOTTOM, 'DrawXLines' => false, '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('OverrideColors' => $palette, 'Gradient' => false, 'GradientMode' => GRADIENT_SIMPLE, 'DisplayPos' => LABEL_POS_TOP, 'DisplayValues' => true, 'DisplayR' => 0, 'DisplayG' => 0, 'DisplayB' => 0, 'DisplayShadow' => true, 'Surrounding' => 10);
$myPicture->drawBarChart($settings);
/* 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;
}
