/**
* 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;
}
/**
* This function draw the graphic to be displayed on the user view as an image
*
* @param array $sql_result
* @param string $start_date
* @param string $end_date
* @param string $type
* @author Jorge Frisancho Jibaja
* @version OCT-22- 2010
* @return string
*/
function grapher($sql_result, $start_date, $end_date, $type = "")
{
if (empty($start_date)) {
$start_date = "";
}
if (empty($end_date)) {
$end_date = "";
}
if ($type == "") {
$type = 'day';
}
$main_year = $main_month_year = $main_day = array();
// get last 8 days/months
$last_days = 5;
$last_months = 3;
for ($i = $last_days; $i >= 0; $i--) {
$main_day[date('d-m-Y', mktime() - $i * 3600 * 24)] = 0;
}
for ($i = $last_months; $i >= 0; $i--) {
$main_month_year[date('m-Y', mktime() - $i * 30 * 3600 * 24)] = 0;
}
$i = 0;
if (is_array($sql_result) && count($sql_result) > 0) {
foreach ($sql_result as $key => $data) {
//creating the main array
$main_month_year[date('m-Y', $data['login'])] += float_format(($data['logout'] - $data['login']) / 60, 0);
$main_day[date('d-m-Y', $data['login'])] += float_format(($data['logout'] - $data['login']) / 60, 0);
if ($i > 500) {
break;
}
$i++;
}
switch ($type) {
case 'day':
$main_date = $main_day;
break;
case 'month':
$main_date = $main_month_year;
break;
case 'year':
$main_date = $main_year;
break;
}
// the nice graphics :D
$labels = array_keys($main_date);
if (count($main_date) == 1) {
$labels = $labels[0];
$main_date = $main_date[$labels];
}
/* Create and populate the pData object */
$myData = new pData();
$myData->addPoints($main_date, 'Serie1');
if (count($main_date) != 1) {
$myData->addPoints($labels, 'Labels');
$myData->setSerieDescription('Labels', 'Months');
$myData->setAbscissa('Labels');
}
$myData->setSerieWeight('Serie1', 1);
$myData->setSerieDescription('Serie1', get_lang('MyResults'));
$myData->setAxisName(0, get_lang('Minutes'));
$myData->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 = $myCache->getHash($myData);
if ($myCache->isInCache($chartHash)) {
//if we already created the img
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
} else {
/* Define width, height and angle */
$mainWidth = 760;
$mainHeight = 230;
$angle = 50;
/* Create the pChart object */
$myPicture = new pImage($mainWidth, $mainHeight, $myData);
/* Turn of Antialiasing */
$myPicture->Antialias = false;
/* Draw the background */
$settings = array("R" => 255, "G" => 255, "B" => 255);
$myPicture->drawFilledRectangle(0, 0, $mainWidth, $mainHeight, $settings);
/* Add a border to the picture */
$myPicture->drawRectangle(0, 0, $mainWidth - 1, $mainHeight - 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 */
$myPicture->drawText($mainWidth / 2, 30, get_lang('ExercisesInTimeProgressChart'), array("FontSize" => 12, "Align" => TEXT_ALIGN_BOTTOMMIDDLE));
/* Set the default font */
$myPicture->setFontProperties(array("FontName" => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', "FontSize" => 8));
/* Define the chart area */
$myPicture->setGraphArea(50, 40, $mainWidth - 40, $mainHeight - 80);
/* Draw the scale */
$scaleSettings = array('XMargin' => 10, 'YMargin' => 10, 'Floating' => true, 'GridR' => 200, 'GridG' => 200, 'GridB' => 200, 'DrawSubTicks' => true, 'CycleBackground' => true, 'LabelRotation' => $angle, 'Mode' => SCALE_MODE_ADDALL_START0);
$myPicture->drawScale($scaleSettings);
/* Turn on Antialiasing */
$myPicture->Antialias = true;
/* Enable shadow computing */
$myPicture->setShadow(true, array("X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10));
/* Draw the line chart */
$myPicture->setFontProperties(array("FontName" => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', "FontSize" => 10));
$myPicture->drawSplineChart();
$myPicture->drawPlotChart(array("DisplayValues" => true, "PlotBorder" => true, "BorderSize" => 1, "Surrounding" => -60, "BorderAlpha" => 80));
/* Do NOT Write the chart legend */
/* 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;
}
$html = '<img src="' . $imgPath . '">';
return $html;
} else {
$foo_img = api_convert_encoding('<div id="messages" class="warning-message">' . get_lang('GraphicNotAvailable') . '</div>', 'UTF-8');
return $foo_img;
}
}
/**
* 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;
}