public function contextAction()
{
$context = $this->getDI()->getShared('ltiContext');
// Send a statement tracking that they viewed this page
$statementHelper = new StatementHelper();
$statement = $statementHelper->buildStatement(["statementName" => "dashboardLaunched", "dashboardID" => "dashboard_select", "dashboardName" => "Dashboard Selector", "verbName" => "launched"], $context);
if ($statement) {
echo "working\n";
$res = $statementHelper->sendStatements("visualization", [$statement]);
echo $res;
}
echo $this->getDI()->getShared('ltiContext')->getCourseKey();
}
public function indexAction()
{
// Get our context (this takes care of starting the session, too)
$context = $this->getDI()->getShared('ltiContext');
$this->view->disable();
// Use the StatementHelper class
$statementHelper = new StatementHelper();
// Make an actual xAPI statement from the post params
$statement = $statementHelper->buildStatement($_POST, $context);
if ($statement) {
// If we've got a valid statement, send it to the visualization LRS (endpoint, username, password are defined in config.php)
echo $statementHelper->sendStatements("visualization", [$statement]);
} else {
echo "Invalid statement parameters";
}
}
public function recent_statementsAction()
{
// Get our context and check that it's valid
$context = $this->getDI()->getShared('ltiContext');
$this->view->context = $context;
if (!$context->valid) {
return;
}
$statementHelper = new StatementHelper();
// Get all statements for current user
$attempts = $statementHelper->getStatements("", ['statement.actor.name' => $context->getUserName()], []);
// Get most recent statements first, and only get 100. (The query hasn't actually been run on the server yet, so we can still add more options)
$cursor = $attempts["cursor"]->sort(['statement.timestamp' => -1]);
$cursor = $attempts["cursor"]->limit(100);
// Send result cursor to view
$this->view->statements = $cursor;
}
public function studentsAction()
{
$this->view->disable();
// Get our context (this takes care of starting the session, too)
$context = $this->getDI()->getShared('ltiContext');
if (!$context->valid) {
echo '[{"error":"Invalid lti context"}]';
return;
}
$classHelper = new ClassHelper();
$masteryHelper = new MasteryHelper();
$statementHelper = new StatementHelper();
$students = $classHelper->allStudents();
$studentInfo = [];
for ($i = 0; $i < 10; $i++) {
// For second parameter of what to query, see http://php.net/manual/en/mongocollection.find.php
$statements = $statementHelper->getStatements("ayamel", ['statement.actor.name' => $students[$i]], ['statement.object.id' => true]);
$count = $statements["cursor"]->count();
$studentInfo[] = ["name" => $students[$i], "count" => $count];
}
echo json_encode($studentInfo);
}
public function calculatePersistenceScore($studentId, $raw = false, $debug = false)
{
// Calculate and store both parts of this skill score
$statementHelper = new StatementHelper();
// Calculate number of watched statements for student
$statements = $statementHelper->getStatements("ayamel", ['statement.actor.name' => $studentId, 'statement.verb.id' => 'https://ayamel.byu.edu/watched', 'timestamp' => array('$gte' => new MongoDate(strtotime('midnight -2 weeks')))], ['statement.object.id' => true]);
if ($statements["error"]) {
$watchStatementCount = 0;
} else {
$watchStatementCount = $statements["cursor"]->count();
}
// Calculate number of question attempt (answered) statements for student
$statements = $statementHelper->getStatements("openassessments", ['statement.actor.name' => $studentId, 'statement.verb.id' => 'http://adlnet.gov/expapi/verbs/answered', 'timestamp' => array('$gte' => new MongoDate(strtotime('midnight -2 weeks')))], ['statement.object.id' => true]);
if ($statements["error"]) {
$attemptCount = 0;
} else {
$attemptCount = $statements["cursor"]->count();
}
// store raw, and then return scaled
$rawAttemptsScore = $attemptCount;
$this->saveRawSkillScore($studentId, "persistence_attempts", $rawAttemptsScore);
$rawWatchedScore = $watchStatementCount;
$this->saveRawSkillScore($studentId, "persistence_watched", $rawWatchedScore);
if ($raw) {
return "{$rawAttemptsScore} , {$rawWatchedScore}";
}
return $this->getScaledSkillScore($studentId, "persistence");
}
public function studentsAction($start, $finish)
{
$this->view->disable();
// Get our context (this takes care of starting the session, too)
$context = $this->getDI()->getShared('ltiContext');
if (!$context->valid) {
echo '[{"error":"Invalid lti context"}]';
return;
}
$timeArray[] = 280;
$classHelper = new ClassHelper();
$masteryHelper = new MasteryHelper();
$statementHelper = new StatementHelper();
$recent_concepts = MappingHelper::conceptsWithin2Weeks();
$students = $classHelper->allStudents();
// $students = ["John Logie Baird","me"];
$studentInfo = [];
$maxCount = 0;
//count($students)
for ($i = $start; $i < $finish; $i++) {
$startTime = microtime(true);
$studentAverages = StudentMasteryHistory::findFirst(["conditions" => "email = ?1", "bind" => array(1 => $students[$i]), "order" => 'time_stored DESC']);
// For second parameter of what to query, see http://php.net/manual/en/mongocollection.find.php
$visStatements = $statementHelper->getStatements("visualization", ['statement.actor.name' => $students[$i]], ['statement.object.id' => true]);
$hints = $statementHelper->getStatements("openassessments", ['statement.actor.name' => $students[$i], 'statement.verb.id' => 'http://adlnet.gov/expapi/verbs/showed-hint'], ['statement.object.id' => true]);
$showAnswer = $statementHelper->getStatements("openassessments", ['statement.actor.name' => $students[$i], 'statement.verb.id' => 'http://adlnet.gov/expapi/verbs/showed-answer'], ['statement.object.id' => true]);
$questionsAnswered = $statementHelper->getStatements("openassessments", ['statement.actor.name' => $students[$i], 'statement.verb.id' => 'http://adlnet.gov/expapi/verbs/answered'], ['statement.object.id' => true, 'statement.context.extensions' => true]);
$hintsShowed = $hints["cursor"]->count();
$answersShowed = $showAnswer["cursor"]->count();
$high = 0;
$medium = 0;
$low = 0;
$attempts = $questionsAnswered["cursor"]->count();
$correct = 0;
foreach ($questionsAnswered["cursor"] as $confidenceCheck) {
$confidenceCheck = StatementHelper::replaceHtmlEntity($confidenceCheck, true);
if ($confidenceCheck['statement']['context']['extensions']['http://byuopenanalytics.byu.edu/expapi/extensions/correct'] == true) {
$correct++;
}
if (array_key_exists('http://byuopenanalytics.byu.edu/expapi/extensions/confidence_level', $confidenceCheck['statement']['context']['extensions'])) {
if ($confidenceCheck['statement']['context']['extensions']['http://byuopenanalytics.byu.edu/expapi/extensions/confidence_level'] == "high") {
$high++;
}
if ($confidenceCheck['statement']['context']['extensions']['http://byuopenanalytics.byu.edu/expapi/extensions/confidence_level'] == "medium") {
$medium++;
}
if ($confidenceCheck['statement']['context']['extensions']['http://byuopenanalytics.byu.edu/expapi/extensions/confidence_level'] == "low") {
$low++;
}
}
}
$commonConfidence = max($high, $medium, $low);
if ($commonConfidence == $high) {
$medianConfidence = "High";
} else {
if ($commonConfidence == $medium) {
$medianConfidence = "Medium";
} else {
$medianConfidence = "Low";
}
}
$count = $visStatements["cursor"]->count();
$escapedString = str_replace("'", "", $students[$i]);
// echo $escapedString;
$lastHistory = VideoHistory::findFirst(["student = '{$escapedString}'", "order" => "time_stored DESC"]);
$vidPercent = $lastHistory->vidpercentage;
if ($count > $maxCount && $students[$i] != 'John Logie Baird') {
$maxCount = $count;
}
if (!is_object($studentAverages)) {
$newStudent = ["name" => $students[$i], "average" => 0, "count" => $count, "vPercentage" => $vidPercent, "correct" => $correct, "attempts" => $attempts, "hintsShowed" => $hintsShowed, "answersShowed" => $answersShowed, "confidence" => $medianConfidence];
} else {
$newStudent = ["name" => $studentAverages->email, "average" => $studentAverages->recent_average, "count" => $count, "vPercentage" => $vidPercent, "correct" => $correct, "attempts" => $attempts, "hintsShowed" => $hintsShowed, "answersShowed" => $answersShowed, "confidence" => $medianConfidence];
}
if ($students[$i] != 'John Logie Baird' && $students[$i] != 'Bob Bodily') {
$studentInfo[] = $newStudent;
}
$endTime = microtime(true);
$timeArray[$i] = $endTime - $startTime;
//echo "Execution time: " . ($endTime - $startTime) ." seconds\n";
}
$avg = 0;
foreach ($timeArray as $time) {
$avg += $time;
}
$avg = $avg / 280;
// echo "Average Time: ".$avg." seconds\n";
//Sorts the students by their recent mastery average, from highest to lowest.
usort($studentInfo, function ($student1, $student2) {
return $student1["average"] <= $student2["average"];
});
$firstRow = ["max" => $maxCount];
array_unshift($studentInfo, $firstRow);
echo json_encode($studentInfo);
}
public function confidence_averageAction()
{
// TODO take out error reporting for production
error_reporting(E_ALL);
$this->view->disable();
// Get our context (this takes care of starting the session, too)
$context = $this->getDI()->getShared('ltiContext');
if (!$context->valid) {
echo '[{"error":"Invalid lti context"}]';
return;
}
// This contains our different data elements
$result = array();
$statementHelper = new StatementHelper();
// Numerical confidence values
$levelValue = ["low" => -1, "medium" => 0, "high" => 1];
$userConfidences = ["overall" => array(), "correct" => array(), "incorrect" => array()];
$classConfidences = ["overall" => array(), "correct" => array(), "incorrect" => array()];
//Get all user answer attempts
$attempts = $statementHelper->getStatements("openassessments", ['statement.verb.id' => 'http://adlnet.gov/expapi/verbs/answered'], ['_id' => false, 'statement.actor.mbox' => true, 'statement.context.extensions' => true, 'statement.result.success' => true]);
if ($attempts["error"]) {
$result[] = ["error" => $attempts["error"]];
} else {
foreach ($attempts["cursor"] as $statement) {
// Since we're now doing more than just counting, we need to do processing that Learning Locker normally would first:
$statement = StatementHelper::replaceHtmlEntity($statement, true);
if (isset($statement['statement']['context']['extensions']['http://byuopenanalytics.byu.edu/expapi/extensions/confidence_level']) && isset($statement['statement']['result']['success'])) {
$level = $statement['statement']['context']['extensions']['http://byuopenanalytics.byu.edu/expapi/extensions/confidence_level'];
$correct = $statement['statement']['result']['success'];
//Put this in user confidences if necessary
if (isset($statement['statement']['actor']['mbox']) && $statement['statement']['actor']['mbox'] == 'mailto:' . $context->getUserEmail()) {
$userConfidences["overall"][] = $levelValue[$level];
if ($correct == true) {
$userConfidences["correct"][] = $levelValue[$level];
} else {
$userConfidences["incorrect"][] = $levelValue[$level];
}
}
// Then always in class confidences
$classConfidences["overall"][] = $levelValue[$level];
if ($correct == true) {
$classConfidences["correct"][] = $levelValue[$level];
} else {
$classConfidences["incorrect"][] = $levelValue[$level];
}
}
}
// User stats
foreach ($userConfidences as $name => $list) {
//Avoid division by 0
$average = count($list) > 0 ? array_sum($list) / count($list) : 0;
$result['user'][$name] = $average;
//$result []= ["name" => $name, "value" => $average];
}
// Class stats
foreach ($classConfidences as $name => $list) {
//Avoid division by 0
$average = count($list) > 0 ? array_sum($list) / count($list) : 0;
$result['class'][$name] = $average;
//$result []= ["name" => $name, "value" => $average];
}
echo json_encode($result);
}
}
public function selectAction()
{
$this->tag->setTitle('Dashboard Selection');
$this->view->pageTitle = 'Dashboard Selection';
// Get our context (this takes care of starting the session, too)
$context = $this->getDI()->getShared('ltiContext');
// Send a statement tracking that they viewed this page
$statementHelper = new StatementHelper();
$statement = $statementHelper->buildStatement(["statementName" => "dashboardLaunched", "dashboardID" => "dashboard_select", "dashboardName" => "Dashboard Selector", "verbName" => "launched"], $context);
if ($statement) {
$statementHelper->sendStatements("visualization", [$statement]);
}
}
public static function calculateUniqueVideoPercentageForVideo($studentId, $video, $debug = false)
{
// Length of each statement in video seconds
$watchedStatementLength = 10;
$possibleWatchedStatementCount = 0;
$userWatchedStatementCount = 0;
// TODO maybe check if $video is a string or int (so that just the ID, e.g. 1234, can be passed in), and then fetch the rest of the info based on that
// Length of video divided by 10 rounded down will be the total number of possible unique watched statements for that video
$possibleWatchedStatementCount += floor($video["Video Length"] / $watchedStatementLength);
// Get the statement ID to search for
$videoId = 'https://ayamel.byu.edu/content/' . $video["Video ID"];
// Calculate how much time this video was watched
$statementHelper = new StatementHelper();
$statements = $statementHelper->getStatements("ayamel", ['statement.actor.name' => $studentId, 'statement.verb.id' => 'https://ayamel.byu.edu/watched', 'statement.object.id' => $videoId], ['statement.object.id' => true, 'statement.object.definition.extensions' => true]);
if ($statements["error"]) {
$userWatchedStatementCount = 0;
if ($debug) {
echo "Error in fetching watched statements for concept {$conceptId} and videos: \n";
print_r($videoIds);
}
} else {
// We need to track unique statements, so student can't get 100% video watched by watching the first half twice
$videoTrackers = [];
$watchStatementCount = $statements["cursor"]->count();
foreach ($statements["cursor"] as $statement) {
// We need to get rid of encoded "."s in extension names
$statement = StatementHelper::replaceHtmlEntity($statement["statement"], true);
// Set a flag for each rounded timestamp for each video
$videoId = $statement["object"]["id"];
$roundedTime = round($statement["object"]["definition"]["extensions"]["https://ayamel.byu.edu/playerTime"] / $watchedStatementLength);
if (!isset($videoTrackers[$videoId])) {
$videoTrackers[$videoId] = [];
}
// See if a statement with the same rounded timestamp was already tracked
if (isset($videoTrackers[$videoId][$roundedTime]) && $videoTrackers[$videoId][$roundedTime] == true) {
$isUnique = false;
} else {
$isUnique = true;
$userWatchedStatementCount++;
// Track this statement
$videoTrackers[$videoId][$roundedTime] = true;
}
if ($debug) {
print_r($statement);
echo "Video id: {$videoId}, rounded time: {$roundedTime}, unique: {$isUnique} \n<hr>";
}
}
}
if ($debug) {
echo "Videos {$videoId} : {$userWatchedStatementCount} unique watched statements out of {$possibleWatchedStatementCount} possible\n";
}
// Return percentage (0-100) of videos watched, avoiding division by 0
$percentage = $possibleWatchedStatementCount != 0 ? $userWatchedStatementCount / $possibleWatchedStatementCount : 0;
$percentage = round($percentage * 100);
return min($percentage, 100);
}
