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DBConnect.php
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<?php
class MyDB extends SQLite3
{
function __construct()
{
$dbName = 'database.sqlite';
$initDB = false;
$initDB = !file_exists($dbName);
$this->open($dbName);
$this->busyTimeout(15000);
if($initDB)
{
chmod($dbName, 0777);
DBInit($this);
//Insert a TA to get things up and going
$this->exec("BEGIN");
$sql = "INSERT INTO TAS (NetId, Counter) VALUES (:netId, 0);";
try
{
$stmt = $this->prepare($sql);
$stmt->bindValue(":netId", phpCAS::getUser());
$stmt->execute();
$stmt->close();
$this->exec("COMMIT");
}
catch(CAS_OutOfSequenceBeforeClientException $e)
{
$this->exec("ROLLBACK");
echo $e;
echo "error adding initial TA";
}
}
}
}
function DBInit($db)
{
if($db == null)
{
$db = new MyDB();
}
else
{
$createUsers = "CREATE TABLE IF NOT EXISTS Students(NetId TEXT Not NULL,name TEXT, Counter INT NOT NULL DEFAULT 0, PassOffCounter Integer DEFAULT 0, UNIQUE(NetId))";
$createTA = "CREATE TABLE IF NOT EXISTS TAS(NetId TEXT Not NULL, name TEXT, Counter INT Not NULL DEFAULT 0, PassOffCounter INT DEFAULT 0, Active Bit Default 1, UNIQUE(NetId))";
$createQueue = "CREATE TABLE IF NOT EXISTS QUEUE(NetId TEXT Not NULL, ENQUEUETIME INT Not NULL, QUEUENUM INT Not NULL, QUESTION TEXT, PASSOFF BIT, STARTEDGETTINGHELPTIME INT, BeingHelpedBy TEXT, queue_id STRING NOT NULL DEFAULT 'inlab', UNIQUE(NetId))";
$createSettings = "CREATE TABLE IF NOT EXISTS SETTINGS(name TEXT Not NULL, value TEXT NOT NULL, UNIQUE(name))";
$createQueueHistory = "CREATE TABLE IF NOT EXISTS QUEUEHISTORY(id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,NetId TEXT NOT NULL, removedBy TEXT NOT NULL,enqueueTime INTEGER NOT NULL, dequeueTime INTEGER NOT NULL, QUESTION TEXT, PASSOFF Bit, DoneGettingHelpTime INTEGER, helpedBy TEXT NOT NULL DEFAULT '', conceptualQuestion BOOLEAN, queue_id STRING NOT NULL DEFAULT 'inlab')";
//$onDeleteQueueTrigger = "CREATE TRIGGER IF NOT EXISTS updateRowonQueueTrigger AFTER UPDATE OF QUEUENUM ON QUEUE BEGIN UPDATE QUEUE SET QUEUENUM = QUEUENUM - 1 WHERE QUEUENUM > Old.QUEUENUM; END;";
$onDeleteQueueTrigger = "CREATE TRIGGER IF NOT EXISTS deleteRowonQueueTrigger AFTER DELETE ON QUEUE BEGIN UPDATE QUEUE SET QUEUENUM = QUEUENUM - 1 WHERE QUEUENUM > Old.QUEUENUM; END;";
//create an after delete trigger on the queue table (get the person who was just deleted and start there and minus one to every spot in line)
//insert the settings
$insertActiveQueue = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('queueActive', 'true')";
$insertName = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('courseTitle', '')";
$insertStudentPollTime = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('studentPollTime', '5000')";
$insertTAPollTime = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('taPollTime', '3000')";
$insertNotifyThreshold = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('notifyThreshold', '3')";
$insertPassOffColor = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('passOffHighlightColor', 'yellow')";
$insertLastXMin = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('lastXMin', '5')";
$insertRequireQuestion = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('requireQuestion', 'true')";
$insertQuestionsPerDay = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('questionsPerDay', '4')";
$insertQuestionsPerWeek = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('questionsPerWeek', '-1')";
$insertMOTD = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('motd', 'Enter your question below')";
$insertMOTDLink = "INSERT OR IGNORE INTO SETTINGS (name, value) VALUES ('motdLink', 'https://docs.google.com/document/d/1iv0NTeHQRJWtglRjoellSI-ILkTQlUBd3k8ob9u3KzE/edit')";
$extendedView = "CREATE VIEW IF NOT EXISTS EXTENDEDQUEUE AS SELECT * FROM QUEUE JOIN Students USING (NetId) WHERE queue_id != 'zoom' ORDER BY QUEUENUM";
$extendedViewOther = "CREATE VIEW IF NOT EXISTS EXTENDEDOTHERQUEUE AS SELECT * FROM QUEUE JOIN Students USING (NetId) WHERE queue_id == 'zoom' ORDER BY QUEUENUM";
$helpedView = "CREATE VIEW IF NOT EXISTS HELPED AS SELECT * FROM QUEUE JOIN Students USING (NetId) WHERE STARTEDGETTINGHELPTIME IS NOT NULL ORDER BY QUEUENUM";
$waitingView = "CREATE VIEW IF NOT EXISTS WAITING AS SELECT * FROM QUEUE JOIN Students USING (NetId) WHERE STARTEDGETTINGHELPTIME IS NULL ORDER BY QUEUENUM";
$db->exec("BEGIN;");
$statement1 = $db->prepare($createUsers);
$statement2 = $db->prepare($createTA);
$statement3 = $db->prepare($createQueue);
$statement5 = $db->prepare($createSettings);
$statementQueueHistory = $db->prepare($createQueueHistory);
//$statement->bindValue(':id', $id);
$statement1->execute();
$statement2->execute();
$statement3->execute();
$statement5->execute();
$statementQueueHistory->execute();
$statement1->close();
$statement2->close();
$statement3->close();
$statement5->close();
$statementQueueHistory->close();
$statement4 = $db->prepare($onDeleteQueueTrigger);
$statement4->execute();
$statement4->close();
$statement7 = $db->prepare($extendedView);
$statement7->execute();
$statement7->close();
$statement7 = $db->prepare($extendedViewOther);
$statement7->execute();
$statement7->close();
$statement7 = $db->prepare($helpedView);
$statement7->execute();
$statement7->close();
$statement7 = $db->prepare($waitingView);
$statement7->execute();
$statement7->close();
$statement6 = $db->prepare($insertActiveQueue);
$statement6->execute();
$statement6->close();
$statement8 = $db->prepare($insertName);
$statement8->execute();
$statement8->close();
$statement9 = $db->prepare($insertStudentPollTime);
$statement9->execute();
$statement9->close();
$statement10 = $db->prepare($insertTAPollTime);
$statement10->execute();
$statement10->close();
$statement11 = $db->prepare($insertNotifyThreshold);
$statement11->execute();
$statement11->close();
$statement12 = $db->prepare($insertPassOffColor);
$statement12->execute();
$statement12->close();
$statement13 = $db->prepare($insertLastXMin);
$statement13->execute();
$statement13->close();
$statement14 = $db->prepare($insertRequireQuestion);
$statement14->execute();
$statement14->close();
$statement14 = $db->prepare($motd);
$statement14->execute();
$statement14->close();
$statement14 = $db->prepare($motdLink);
$statement14->execute();
$statement14->close();
$statement14 = $db->prepare($insertQuestionsPerDay);
$statement14->execute();
$statement14->close();
$statement14 = $db->prepare($insertQuestionsPerWeek);
$statement14->execute();
$statement14->close();
$db->exec('COMMIT');
//dont close $db because its going to be used by whom ever calle this function
}
//return "statement1: " + var_dump($statement1);
}
function enqueue($userId, $question, $passOff, $queueId)
{
//see if queue is active
if (isQueueActive() == false)
{
return getUserStatus($userId);
}
$db = new MyDB();
$db->exec("BEGIN;");
/*$onDeleteQueueTrigger = "CREATE TRIGGER IF NOT EXISTS deleteRowonQueueTrigger AFTER DELETE ON QUEUE BEGIN UPDATE QUEUE SET QUEUENUM = QUEUENUM - 1 WHERE QUEUENUM > Old.QUEUENUM; END;";
$statement4 = $db->prepare($onDeleteQueueTrigger);
$statement4->execute();
$statement4->close();*/
//check if person is already on the list
$findDups = "Select * From Queue WHERE NetId = :id";
$findDupsStmt = $db->prepare($findDups);
$findDupsStmt->bindValue(':id',$userId);
$findDupsResult = $findDupsStmt->execute();
if($findDupsRow = $findDupsResult->fetchArray(SQLITE3_ASSOC) )
{
$findDupsResult->finalize();
$findDupsStmt->close();
//return data already in DB
$db->exec("COMMIT");
$db->close();
unset($db);
if ($findDupsRow["queue_id"] == $queueId)
{
return array("status"=>"success", "userId"=>$findDupsRow["NetId"], "spot"=>$findDupsRow["QUEUENUM"], "enqueueTime"=>$findDupsRow["ENQUEUETIME"], "question"=>$findDupsRow["QUESTION"], "passOff"=>$findDupsRow["PASSOFF"], "gettingHelpTime"=>$findDupsRow["STARTEDGETTINGHELPTIME"], "beingHelpedBy"=>$findDupsRow["BeingHelpedBy"]);
}
else {
return array("status"=>"error", "message"=>"You can only be in one queue at a time. If you would like to get into this one, please remove yourself from the other queue.");
}
}
else
{
$findDupsResult->finalize();
$findDupsStmt->close();
}
/*
$getTopQueue = "SELECT MAX(QUEUENUM) AS MAXNUM FROM QUEUE";
//$getTopQueue = "SELECT Count(*) AS MAXNUM FROM QUEUE";
$statement2 = $db->prepare($getTopQueue);
$result1 = $statement2->execute();
//$getQueueNum = "SELECT Count(*) FROM QUEUE";
//$statement2 = $db->prepare($getQueueNum);
//$queueNumResult = $statement2->excecute();
if($topResultRow = $result1->fetchArray(SQLITE3_ASSOC) )
{
$queueNum = $topResultRow["MAXNUM"] + 1;
}
else
{
$queueNum = 1;
}
$result1->finalize();
$statement2->close();*/
$getTopQueue = "SELECT MAX(QUEUENUM) AS MAXNUM FROM QUEUE WHERE queue_id = :queueId";
//$getTopQueue = "SELECT Count(*) AS MAXNUM FROM QUEUE";
$statement2 = $db->prepare($getTopQueue);
$statement2->bindValue(":queueId", $queueId);
$result1 = $statement2->execute();
if($topResultRow = $result1->fetchArray(SQLITE3_ASSOC) )
{
$queueNum = $topResultRow["MAXNUM"] + 1;
}
else
{
$queueNum = 1;
}
$result1->finalize();
$statement2->close();
require_once 'CAS-1.3.4/CAS.php';
phpCAS::client(CAS_VERSION_2_0,'cas.byu.edu',443,'cas');
$auth = phpCAS::checkAuthentication();
//here we could check auth. if it is false send back a json {status:loggedOut}
//uncomment this only during testing
//$auth = true;
if(!$auth)
{
return array("status"=>"loggedOut");
}
else
{
try
{
$toReturn;
//check the supplied userID is the same as the logged in user
//*******************************************************************
//comment this only during testing
if(phpCAS::getUser() == $userId)
{
//Clean up any injecting jank
$invalid_characters = array("$", "%", "#", "<", ">", "|");
$question = str_replace($invalid_characters, "", $question);
$passOff = str_replace($invalid_characters, "", $passOff);
if($passOff == "true")
{
$question = "PASS OFF";
}
else //not passing off
{
if($question == "PASS OFF")
{
return array("status"=>"error", "message"=>"Not a valid question. If you want to pass off click the check box");
}
}
if(strlen($question) > 200)
{
return array("status"=>"error", "message"=>"Question length is too long");
}
$stmt = "SELECT value from SETTINGS WHERE name = 'questionsPerDay'";
$stmt = $db->prepare($stmt);
$result = $stmt->execute();
$questionsPerDay = $result->fetchArray(SQLITE3_ASSOC)["value"];
$result->finalize();
$stmt->close();
$stmt = "SELECT value from SETTINGS WHERE name = 'questionsPerWeek'";
$stmt = $db->prepare($stmt);
$result = $stmt->execute();
$questionsPerWeek = $result->fetchArray(SQLITE3_ASSOC)["value"];
$result->finalize();
$stmt->close();
$queueAbuseData = "SELECT COUNT(*) AS COUNT FROM QUEUEHISTORY WHERE NetId = :netId and removedBy is not :helper and enqueueTime >= :curTime and conceptualQuestion is not 'true'";
$queueAbuseStmt = $db->prepare($queueAbuseData);
$queueAbuseStmt->bindValue(':netId', $userId);
$queueAbuseStmt->bindValue(':helper', $userId);
$queueAbuseStmt->bindValue(':curTime', strtotime("today") * 1000);
$result = $queueAbuseStmt->execute();
$timesInPreviousDay = $result->fetchArray(SQLITE3_ASSOC);
$timesInPreviousDay = $timesInPreviousDay["COUNT"];
$result->finalize();
$queueAbuseStmt->close();
$queueAbuseData = "SELECT COUNT(*) AS COUNT FROM QUEUEHISTORY WHERE NetId = :netId and removedBy is not :helper and enqueueTime >= :curTime and conceptualQuestion is not 'true'";
$queueAbuseStmt = $db->prepare($queueAbuseData);
$queueAbuseStmt->bindValue(':netId', $userId);
$queueAbuseStmt->bindValue(':helper', $userId);
$queueAbuseStmt->bindValue(':curTime', strtotime("sunday last week") * 1000);
$result = $queueAbuseStmt->execute();
$timesInPreviousWeek = $result->fetchArray(SQLITE3_ASSOC);
$timesInPreviousWeek = $timesInPreviousWeek["COUNT"];
$result->finalize();
$queueAbuseStmt->close();
if ($questionsPerDay != -1 && $timesInPreviousDay > $questionsPerDay - 1)
{
return array("status"=>"error", "message"=>"You have exceeded the daily question limit.");
}
if ($questionsPerWeek != -1 && $timesInPreviousWeek > $questionsPerWeek - 1)
{
return array("status"=>"error", "message"=>"You have exceeded the weekly question limit.");
}
//enter the data in
$insertData = "INSERT INTO QUEUE (NetId, ENQUEUETIME, QUEUENUM, QUESTION, PASSOFF, queue_id) VALUES (:netId, :time, :spot, :question, :passoff, :queueId);";
$insertDupsStmt = $db->prepare($insertData);
$insertDupsStmt->bindValue(':netId',$userId);
$insertDupsStmt->bindValue(':time',time()*1000);
$insertDupsStmt->bindValue(':spot', $queueNum);
$insertDupsStmt->bindValue(':question',$question);
$insertDupsStmt->bindValue(':passoff', $passOff);
$insertDupsStmt->bindValue(':queueabuse', $queueAbuse);
$insertDupsStmt->bindValue(':queueId', $queueId);
//add the student to the student table
$insertToStudent = "INSERT OR IGNORE INTO STUDENTS (NetId, counter) VALUES (:netId, 0)";
$insertToStudentStmt = $db->prepare($insertToStudent);
$insertToStudentStmt->bindValue(':netId',$userId);
$insertDupsStmt->execute();
$insertToStudentStmt->execute();
$insertDupsStmt->close();
$insertToStudentStmt->close();
$toReturn = array("status"=>"success", "enqueueTime"=>time()*1000, "spot"=>$queueNum, "question"=>$question, "passOff"=>$passOff);
}
else
{
$toReturn = array("status"=>"error", "message"=>"not authorized");
}
$db->exec("COMMIT");
$db->close();
unset($db);
return $toReturn;
}
catch(CAS_OutOfSequenceBeforeClientException $e)
{
//return error
$db->exec("ROLLBACK");
$db->close();
unset($db);
return array("status"=>"error", "message"=>"not authorized");
}
}
}
function shouldLimitDaily()
{
$db = new MyDB();
$db->exec("BEGIN;");
$stmt = "SELECT value from SETTINGS WHERE name = 'questionsPerDay'";
$stmt = $db->prepare($stmt);
$result = $stmt->execute();
$questionsPerDay = $result->fetchArray(SQLITE3_ASSOC)["value"];
$result->finalize();
$stmt->close();
$db->exec("COMMIT");
$db->close();
unset($db);
return $questionsPerDay != -1;
}
function shouldLimitWeekly()
{
$db = new MyDB();
$db->exec("BEGIN;");
$stmt = "SELECT value from SETTINGS WHERE name = 'questionsPerWeek'";
$stmt = $db->prepare($stmt);
$result = $stmt->execute();
$questionsPerWeek = $result->fetchArray(SQLITE3_ASSOC)["value"];
$result->finalize();
$stmt->close();
$db->exec("COMMIT");
$db->close();
unset($db);
return $questionsPerWeek != -1;
}
function finishHelping($userIdToRemove, $isConceptual)
{
try
{
require_once 'CAS-1.3.4/CAS.php';
phpCAS::client(CAS_VERSION_2_0,'cas.byu.edu',443,'cas');
$auth = phpCAS::checkAuthentication();
$thisUsersID = phpCAS::getUser();
//only uncomment during testing
//$thisUsersID = $userIdToRemove; //this means someones removing themselves
//$thisUsersID = $userIdToRemove . "NOT"; //this means a TA is removing someone
$settings = getSettings();
$db = new MyDB();
$db->exec("BEGIN;");
$arrayToReturn;
$enqueueDetails = getEnqueueDetails($db, $userIdToRemove);
//the student is removing themselves
if($thisUsersID == $userIdToRemove)
{
//check if they were being helped, if so treat is as if the TA removed them, otherwise just remove them
if($enqueueDetails["startedGettingHelpTime"] == null)
{
//just remove student from queue no mas
/*$updateQueue = "UPDATE QUEUE SET QUEUENUM = QUEUENUM - 1 WHERE QUEUENUM > Old.QUEUENUM";
$updateStmt = $db->prepare($updateQueue);
$updateStmt->excecute();
$updateStmt->close();*/
$removeUser = "DELETE FROM QUEUE WHERE NetId = :netId";
$removeUserStmt = $db->prepare($removeUser);
$removeUserStmt->bindValue(':netId',$userIdToRemove);
$removeUserStmt->execute();
$removeUserStmt->close();
if($db->changes() > 0)
{
insertHistory($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, "inlab");
}
}
else //the student was being helped by a TA, so act like a TA removed them
{
dequeueHelperForTa($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, "inlab");
}
//update
$avgs = getAverages($db);
$arrayToReturn = array("status"=>'success', "userId"=>$thisUsersID, "spot"=>-1, "enqueueTime"=>0, "settings"=>$settings, "avgs"=>$avgs);
}
else //it could be a TA. Lets check
{
$findTA = "SELECT COUNT(*) AS NUM FROM TAS WHERE NetId = :netId";
$findTAStmt = $db->prepare($findTA);
$findTAStmt->bindValue(':netId',$thisUsersID);
$findTARslt = $findTAStmt->execute();
//A TA was found
$findTARow = $findTARslt->fetchArray(SQLITE3_ASSOC);
if($findTARow["NUM"] == 1)
{
$findTARslt->finalize();
$findTAStmt->close();
//
// //Check if STARTEDGETTINGHELPTIME is empty, if so, update QUEUE and set STARTEDGETTINGHELPTIME to current time
// if($enqueueDetails["startedGettingHelpTime"] == null)
// {
// $sql = "UPDATE QUEUE Set startedGettingHelpTime = :time, BeingHelpedBy = :taId, QUEUENUM = 0 WHERE netId = :netId"; //Q
// $updateStmt = $db->prepare($sql);
// $updateStmt->bindValue(":netId", $userIdToRemove);
// $updateStmt->bindValue(":taId", $thisUsersID);
// $updateStmt->bindValue("time", time()*1000);
// $updateStmt->execute();
// $updateStmt->close();
// }
// else //remove them from the queue and update the history
// {
dequeueHelperForTaConceptual($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, $isConceptual, "inlab");
// }
$avgs = getAverages($db);
$arrayToReturn = array("status"=>"success", "list"=>getQueue($db, "inlab"), "helped"=>getHelped($db, "inlab"), "other_list"=>getQueue($db, "zoom"), "other_helped"=>getHelped($db, "zoom"), "avgs"=>$avgs);
}
else
{
$findTARslt->finalize();
$findTAStmt->close();
//return error
$arrayToReturn = array("status"=>"error", "message"=>"not authorized to remove that person");
}
}
$db->exec("COMMIT");
}
catch(CAS_OutOfSequenceBeforeClientException $e)
{
//return error
$db->exec("ROLLBACK");
$arrayToReturn = array("status"=>"error", "message"=>"not authorized");
}
$db->close();
unset($db);
return $arrayToReturn;
}
function finishHelpingOtherQueue($userIdToRemove, $isConceptual)
{
try
{
require_once 'CAS-1.3.4/CAS.php';
phpCAS::client(CAS_VERSION_2_0,'cas.byu.edu',443,'cas');
$auth = phpCAS::checkAuthentication();
$thisUsersID = phpCAS::getUser();
//only uncomment during testing
//$thisUsersID = $userIdToRemove; //this means someones removing themselves
//$thisUsersID = $userIdToRemove . "NOT"; //this means a TA is removing someone
$settings = getSettings();
$db = new MyDB();
$db->exec("BEGIN;");
$arrayToReturn;
$enqueueDetails = getEnqueueDetails($db, $userIdToRemove);
//the student is removing themselves
if($thisUsersID == $userIdToRemove)
{
//check if they were being helped, if so treat is as if the TA removed them, otherwise just remove them
if($enqueueDetails["startedGettingHelpTime"] == null)
{
//just remove student from queue no mas
/*$updateQueue = "UPDATE QUEUE SET QUEUENUM = QUEUENUM - 1 WHERE QUEUENUM > Old.QUEUENUM";
$updateStmt = $db->prepare($updateQueue);
$updateStmt->excecute();
$updateStmt->close();*/
$removeUser = "DELETE FROM QUEUE WHERE NetId = :netId and queue_id = :queueId";
$removeUserStmt = $db->prepare($removeUser);
$removeUserStmt->bindValue(':netId',$userIdToRemove);
$removeUserStmt->bindValue(':netId',"zoom");
$removeUserStmt->execute();
$removeUserStmt->close();
if($db->changes() > 0)
{
insertHistory($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, "zoom");
}
}
else //the student was being helped by a TA, so act like a TA removed them
{
dequeueHelperForTa($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, "zoom");
}
//update
$avgs = getAverages($db);
$arrayToReturn = array("status"=>'success', "userId"=>$thisUsersID, "spot"=>-1, "enqueueTime"=>0, "settings"=>$settings, "avgs"=>$avgs);
}
else //it could be a TA. Lets check
{
$findTA = "SELECT COUNT(*) AS NUM FROM TAS WHERE NetId = :netId";
$findTAStmt = $db->prepare($findTA);
$findTAStmt->bindValue(':netId',$thisUsersID);
$findTARslt = $findTAStmt->execute();
//A TA was found
$findTARow = $findTARslt->fetchArray(SQLITE3_ASSOC);
if($findTARow["NUM"] == 1)
{
$findTARslt->finalize();
$findTAStmt->close();
dequeueHelperForTaConceptual($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, $isConceptual, "zoom");
$avgs = getAverages($db);
$arrayToReturn = array("status"=>"success", "list"=>getQueue($db, "inlab"), "helped"=>getHelped($db, "inlab"), "other_list"=>getQueue($db, "zoom"), "other_helped"=>getHelped($db, "zoom"), "avgs"=>$avgs);
}
else
{
$findTARslt->finalize();
$findTAStmt->close();
//return error
$arrayToReturn = array("status"=>"error", "message"=>"not authorized to remove that person");
}
}
$db->exec("COMMIT");
}
catch(CAS_OutOfSequenceBeforeClientException $e)
{
//return error
$db->exec("ROLLBACK");
$arrayToReturn = array("status"=>"error", "message"=>"not authorized");
}
$db->close();
unset($db);
return $arrayToReturn;
}
function dequeueUser($userIdToRemove)
{
try
{
require_once 'CAS-1.3.4/CAS.php';
phpCAS::client(CAS_VERSION_2_0,'cas.byu.edu',443,'cas');
$auth = phpCAS::checkAuthentication();
$thisUsersID = phpCAS::getUser();
//only uncomment during testing
//$thisUsersID = $userIdToRemove; //this means someones removing themselves
//$thisUsersID = $userIdToRemove . "NOT"; //this means a TA is removing someone
$settings = getSettings();
$db = new MyDB();
$db->exec("BEGIN;");
$arrayToReturn;
$enqueueDetails = getEnqueueDetails($db, $userIdToRemove);
//the student is removing themselves
if($thisUsersID == $userIdToRemove)
{
//check if they were being helped, if so treat is as if the TA removed them, otherwise just remove them
if($enqueueDetails["startedGettingHelpTime"] == null)
{
//just remove student from queue no mas
/*$updateQueue = "UPDATE QUEUE SET QUEUENUM = QUEUENUM - 1 WHERE QUEUENUM > Old.QUEUENUM";
$updateStmt = $db->prepare($updateQueue);
$updateStmt->excecute();
$updateStmt->close();*/
$removeUser = "DELETE FROM QUEUE WHERE NetId = :netId";
$removeUserStmt = $db->prepare($removeUser);
$removeUserStmt->bindValue(':netId',$userIdToRemove);
$removeUserStmt->execute();
$removeUserStmt->close();
if($db->changes() > 0)
{
insertHistory($db, $userIdToRemove, $userIdToRemove, $enqueueDetails, "inlab");
}
}
else //the student was being helped by a TA, so act like a TA removed them
{
dequeueHelperForTa($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, "inlab");
}
//update
$avgs = getAverages($db);
$arrayToReturn = array("status"=>'success', "userId"=>$thisUsersID, "spot"=>-1, "enqueueTime"=>0, "settings"=>$settings, "avgs"=>$avgs);
}
else //it could be a TA. Lets check
{
$findTA = "SELECT COUNT(*) AS NUM FROM TAS WHERE NetId = :netId";
$findTAStmt = $db->prepare($findTA);
$findTAStmt->bindValue(':netId',$thisUsersID);
$findTARslt = $findTAStmt->execute();
//A TA was found
$findTARow = $findTARslt->fetchArray(SQLITE3_ASSOC);
if($findTARow["NUM"] == 1)
{
$findTARslt->finalize();
$findTAStmt->close();
//Check if STARTEDGETTINGHELPTIME is empty, if so, update QUEUE and set STARTEDGETTINGHELPTIME to current time
if($enqueueDetails["startedGettingHelpTime"] == null)
{
$sql = "UPDATE QUEUE Set startedGettingHelpTime = :time, BeingHelpedBy = :taId, QUEUENUM = 0 WHERE netId = :netId"; //Q
$updateStmt = $db->prepare($sql);
$updateStmt->bindValue(":netId", $userIdToRemove);
$updateStmt->bindValue(":taId", $thisUsersID);
$updateStmt->bindValue("time", time()*1000);
$updateStmt->execute();
$updateStmt->close();
}
// else //remove them from the queue and update the history
// {
// dequeueHelperForTa($db, $userIdToRemove, $thisUsersID, $enqueueDetails);
// }
$avgs = getAverages($db);
$arrayToReturn = array("status"=>"success", "list"=>getQueue($db, "inlab"), "helped"=>getHelped($db, "inlab"), "other_list"=>getQueue($db, "zoom"), "other_helped"=>getHelped($db, "zoom"), "avgs"=>$avgs);
}
else
{
$findTARslt->finalize();
$findTAStmt->close();
//return error
$arrayToReturn = array("status"=>"error", "message"=>"not authorized to remove that person");
}
}
$db->exec("COMMIT");
}
catch(CAS_OutOfSequenceBeforeClientException $e)
{
//return error
$db->exec("ROLLBACK");
$arrayToReturn = array("status"=>"error", "message"=>"not authorized");
}
$db->close();
unset($db);
return $arrayToReturn;
}
function dequeueUserOtherQueue($userIdToRemove)
{
try
{
require_once 'CAS-1.3.4/CAS.php';
phpCAS::client(CAS_VERSION_2_0,'cas.byu.edu',443,'cas');
$auth = phpCAS::checkAuthentication();
$thisUsersID = phpCAS::getUser();
//only uncomment during testing
//$thisUsersID = $userIdToRemove; //this means someones removing themselves
//$thisUsersID = $userIdToRemove . "NOT"; //this means a TA is removing someone
$settings = getSettings();
$db = new MyDB();
$db->exec("BEGIN;");
$arrayToReturn;
$enqueueDetails = getEnqueueDetails($db, $userIdToRemove);
//the student is removing themselves
if($thisUsersID == $userIdToRemove)
{
//check if they were being helped, if so treat is as if the TA removed them, otherwise just remove them
if($enqueueDetails["startedGettingHelpTime"] == null)
{
//just remove student from queue no mas
/*$updateQueue = "UPDATE QUEUE SET QUEUENUM = QUEUENUM - 1 WHERE QUEUENUM > Old.QUEUENUM";
$updateStmt = $db->prepare($updateQueue);
$updateStmt->excecute();
$updateStmt->close();*/
$removeUser = "DELETE FROM QUEUE WHERE NetId = :netId AND queue_id == 'zoom'";
$removeUserStmt = $db->prepare($removeUser);
$removeUserStmt->bindValue(':netId',$userIdToRemove);
$removeUserStmt->execute();
$removeUserStmt->close();
if($db->changes() > 0)
{
insertHistory($db, $userIdToRemove, $userIdToRemove, $enqueueDetails, "zoom");
}
}
else //the student was being helped by a TA, so act like a TA removed them
{
dequeueHelperForTa($db, $userIdToRemove, $enqueueDetails["beingHelpedBy"], $enqueueDetails, "zoom");
}
//update
$avgs = getAverages($db);
$arrayToReturn = array("status"=>'success', "userId"=>$thisUsersID, "spot"=>-1, "enqueueTime"=>0, "settings"=>$settings, "avgs"=>$avgs);
}
else //it could be a TA. Lets check
{
$findTA = "SELECT COUNT(*) AS NUM FROM TAS WHERE NetId = :netId";
$findTAStmt = $db->prepare($findTA);
$findTAStmt->bindValue(':netId',$thisUsersID);
$findTARslt = $findTAStmt->execute();
//A TA was found
$findTARow = $findTARslt->fetchArray(SQLITE3_ASSOC);
if($findTARow["NUM"] == 1)
{
$findTARslt->finalize();
$findTAStmt->close();
//Check if STARTEDGETTINGHELPTIME is empty, if so, update QUEUE and set STARTEDGETTINGHELPTIME to current time
if($enqueueDetails["startedGettingHelpTime"] == null)
{
$sql = "UPDATE QUEUE Set startedGettingHelpTime = :time, BeingHelpedBy = :taId, QUEUENUM = 0 WHERE netId = :netId and queue_id = :queudId"; //Q
$updateStmt = $db->prepare($sql);
$updateStmt->bindValue(":netId", $userIdToRemove);
$updateStmt->bindValue(":taId", $thisUsersID);
$updateStmt->bindValue("time", time()*1000);
$updateStmt->bindValue(":queueId", "zoom");
$updateStmt->execute();
$updateStmt->close();
}
// else //remove them from the queue and update the history
// {
// dequeueHelperForTa($db, $userIdToRemove, $thisUsersID, $enqueueDetails);
// }
$avgs = getAverages($db);
$arrayToReturn = array("status"=>"success", "list"=>getQueue($db, "inlab"), "helped"=>getHelped($db, "inlab"), "other_list"=>getQueue($db, "zoom"), "other_helped"=>getHelped($db, "zoom"), "avgs"=>$avgs);
}
else
{
$findTARslt->finalize();
$findTAStmt->close();
//return error
$arrayToReturn = array("status"=>"error", "message"=>"not authorized to remove that person");
}
}
$db->exec("COMMIT");
}
catch(CAS_OutOfSequenceBeforeClientException $e)
{
//return error
$db->exec("ROLLBACK");
$arrayToReturn = array("status"=>"error", "message"=>"not authorized");
}
$db->close();
unset($db);
return $arrayToReturn;
}
function dequeueHelperForTa($db, $userIdToRemove, $thisUsersID, $enqueueDetails, $queueId)
{
dequeueHelperForTaConceptual($db, $userIdToRemove, $thisUsersID, $enqueueDetails, false, $queueId);
}
function dequeueHelperForTaConceptual($db, $userIdToRemove, $thisUsersID, $enqueueDetails, $isConceptual, $queueId)
{
//remove the student from the queue (a trigger will update everyone elses spot in line)
$removeStudentSQL = "DELETE FROM QUEUE WHERE NetId = :netId AND queue_id = :queueId";
$removeStudentStmt = $db->prepare($removeStudentSQL);
$removeStudentStmt->bindValue(':netId',$userIdToRemove);
$removeStudentStmt->bindValue(':queueId', $queueId);
$removeStudentStmt->execute();
$removeStudentStmt->close();
if($db->changes() > 0)
{
$incrementStudentCounter;
$incrementTACounter;
if($enqueueDetails["passOff"] == "true")
{
$incrementTACounter = "UPDATE TAS SET PassOffCounter = PassOffCounter + 1 WHERE NetId = :netId";
$incrementStudentCounter = "UPDATE Students SET PassOffCOUNTER = PassOffCOUNTER + 1 WHERE NetId = :netId";
}
else
{
$incrementTACounter = "UPDATE TAS SET Counter = Counter + 1 WHERE NetId = :netId";
$incrementStudentCounter = "UPDATE Students SET COUNTER = COUNTER + 1 WHERE NetId = :netId";
}
//increment the TAs counter
$incrementTACounterStmt = $db->prepare($incrementTACounter);
$incrementTACounterStmt->bindValue(':netId',$thisUsersID);
$incrementTACounterStmt->execute();
$incrementTACounterStmt->close();
//increment the Students counter
$incrementStudentCounterStmt = $db->prepare($incrementStudentCounter);
$incrementStudentCounterStmt->bindValue(':netId',$userIdToRemove);
$incrementStudentCounterStmt->execute();
$incrementStudentCounterStmt->close();
insertHistoryConceptual($db, $userIdToRemove, $thisUsersID, $enqueueDetails, $isConceptual, $queueId);
}
}
function getEnqueueDetails($db, $netId)
{
$getTimeStamp = "Select * FROM QUEUE WHERE NetId = :netId";
$getTimeStampStmt = $db->prepare($getTimeStamp);
$getTimeStampStmt->bindValue(':netId', $netId);
$getTimeStampResult = $getTimeStampStmt->execute();
$toReturn = array();
if($getTimeStampRow = $getTimeStampResult->fetchArray(SQLITE3_ASSOC) )
{
$toReturn = array("enqueueTime"=>$getTimeStampRow["ENQUEUETIME"], "question"=>$getTimeStampRow["QUESTION"], "passOff"=>$getTimeStampRow["PASSOFF"], "startedGettingHelpTime"=>$getTimeStampRow["STARTEDGETTINGHELPTIME"], "beingHelpedBy"=>$getTimeStampRow["BeingHelpedBy"]);
}
$getTimeStampResult->finalize();
$getTimeStampStmt->close();
return $toReturn;
}
function insertHistory($db, $netId, $removedBy, $enqueueDetails, $queueId)
{
insertHistoryConceptual($db, $netId, $removedBy, $enqueueDetails, false, $queueId);
}
function insertHistoryConceptual($db, $netId, $removedBy, $enqueueDetails, $isConceptual, $queueId)
{
$insertHistory = "Insert Into QUEUEHISTORY (NetId, removedBy, enqueueTime, dequeueTime, QUESTION, PASSOFF, DoneGettingHelpTime, conceptualQuestion, queue_id) VALUES (:netId, :removedBy, :enqueueTime, :dequeueTime, :question, :passoff, :doneGettingHelpTime, :isConceptual, :queueId)";
$dequeueHistoryStmt = $db->prepare($insertHistory);
$dequeueHistoryStmt->bindValue(':netId', $netId);
$dequeueHistoryStmt->bindValue(':removedBy', $removedBy);
$dequeueHistoryStmt->bindValue(':enqueueTime', $enqueueDetails["enqueueTime"]);
//if startedGettingHelpTime is null and were here it means a student got out of line without getting help. Just insert the current time
$dequeueHistoryStmt->bindValue(':dequeueTime', ($enqueueDetails["startedGettingHelpTime"] == null ? time()*1000 : $enqueueDetails["startedGettingHelpTime"]));
$dequeueHistoryStmt->bindValue(':question', $enqueueDetails["question"]);
$dequeueHistoryStmt->bindValue(':passoff', $enqueueDetails["passOff"]);
//if startedGettingHelpTime is null they didn't get help so just put null here, other wise put in the current time
$dequeueHistoryStmt->bindValue(':doneGettingHelpTime', ($enqueueDetails["startedGettingHelpTime"] == null ? $enqueueDetails["startedGettingHelpTime"] : time()*1000));
$dequeueHistoryStmt->bindValue(':isConceptual', $isConceptual);
$dequeueHistoryStmt->bindValue(':queueId', $queueId);
$dequeueHistoryStmt->execute();
$dequeueHistoryStmt->close();
}
function clearQueue()
{
$toReturn;
try
{
require_once 'CAS-1.3.4/CAS.php';
phpCAS::client(CAS_VERSION_2_0,'cas.byu.edu',443,'cas');
$auth = phpCAS::checkAuthentication();
//only a TA can do this
if(verifyTA(phpCAS::getUser()))
{
$db = new MyDB();
$db->exec("BEGIN;");
//get all entrys in the queue, have to insert them into queuehistory table
//After thinking it over I decided to comment this out. My reasoning is that if someone clears the
//queue, no ones stats are increased, so why should the QueueHistory reflect that
/* $getAllQueue = "Select * FROM QUEUE";
$getAllQueueStmt = $db->prepare($getAllQueue);
$getAllQueueRslt = $getAllQueueStmt->execute();
$insertHistory = "Insert Into QUEUEHISTORY (NetId, removedBy, enqueueTime, dequeueTime) VALUES (:netId, :removedBy, :enqueueTime, :dequeueTime)";
$dequeueHistoryStmt = $db->prepare($insertHistory);
while($row = $getAllQueueRslt->fetchArray(SQLITE3_ASSOC) )
{
$dequeueHistoryStmt->bindValue(':netId', $row["NetId"]);
$dequeueHistoryStmt->bindValue(':removedBy', phpCAS::getUser());
$dequeueHistoryStmt->bindValue(':enqueueTime', $row["ENQUEUETIME"]);
$dequeueHistoryStmt->bindValue(':dequeueTime', time()*1000);
$dequeueHistoryStmt->execute();
}
$getAllQueueRslt->finalize();
$getAllQueueStmt->close();
$dequeueHistoryStmt->close();
*/
$sql = "DELETE FROM QUEUE";
$stmt = $db->prepare($sql);
$stmt->execute();
$stmt->close();
$avgs = getAverages($db);
$toReturn = array("status"=>"success", "list"=>getQueue($db, "inlab"), "helped"=>getHelped($db, "inlab"), "other_list"=>getQueue($db, "zoom"), "other_helped"=>getHelped($db, "zoom"), "avgs"=>$avgs);
$db->exec("COMMIT");
$db->close();
unset($db);
}
else
$toReturn = array("status"=>"No authorized to do that");
}
catch(CAS_OutOfSequenceBeforeClientException $e)
{
$toReturn = array("status"=>"error", "message"=>"login error");
}
return $toReturn;
}
function getQuestionStatus($db, $userId)
{
$stmt = "SELECT value from SETTINGS WHERE name = 'questionsPerDay'";
$stmt = $db->prepare($stmt);
$result = $stmt->execute();
$questionsPerDay = $result->fetchArray(SQLITE3_ASSOC)["value"];
$result->finalize();
$stmt->close();
$stmt = "SELECT value from SETTINGS WHERE name = 'questionsPerWeek'";
$stmt = $db->prepare($stmt);
$result = $stmt->execute();
$questionsPerWeek = $result->fetchArray(SQLITE3_ASSOC)["value"];
$result->finalize();
$stmt->close();
$queueAbuseData = "SELECT COUNT(*) AS COUNT FROM QUEUEHISTORY WHERE NetId is :netId and removedBy is not :helper and enqueueTime >= :curTime and conceptualQuestion is not 'true'";
$queueAbuseStmt = $db->prepare($queueAbuseData);
$queueAbuseStmt->bindValue(':netId', $userId);
$queueAbuseStmt->bindValue(':helper', $userId);
$queueAbuseStmt->bindValue(':curTime', strtotime("today") * 1000);