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acceptRequest.php
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acceptRequest.php
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<?php
header("Content-type:application/json");
$_SERVER['CONTENT_TYPE'] = "application/x-www-form-urlencoded";
error_reporting(E_ALL ^ E_WARNING && E_NOTICE);
//Response class
class AcceptRequestResponse
{
var $successful;
var $errorCode;
var $emailed;
function __construct()
{
$this->emailed = false;
$this->successful = false;
$this->errorCode = "";
}
}
//Connection properties
$servername = "localhost";
$username = "root";
$password = "admin";
//Create connection
$conn = new mysqli($servername, $username, $password);
//Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
//cold initialization
$requestType = $_POST["requestType"];
$roomID = $_POST["roomID"];
$userID = $_POST["userID"];
$courseID = $_POST["courseID"];
$dayOfWeek = $_POST["dayOfWeek"];
$slot = $_POST["slot"];
$length = $_POST["length"];
$busySlots = [0, 0, 0, 0, 0, 0, 0];
if ($requestType == "EXTRA") {
// Call the slots and lengths of each class that is schedule in the same room for the same day
$extraScheduleSlots = "SELECT slot, class_length FROM db_classroom_management.tbl_extra_schedule WHERE room_id = $roomID AND day_of_week = $dayOfWeek AND request_type = 'EXTRA' AND accept_status = 'ACCEPTED'";
$extraScheduleSlotsResult = mysqli_query($conn, $extraScheduleSlots);
$slotsNo = mysqli_num_rows($extraScheduleSlotsResult);
while ($row = mysqli_fetch_assoc($extraScheduleSlotsResult)) {
$tempSlot = $row['slot'];
$tempLength = $row['class_length'];
$busySlots[$tempSlot - 1] = 1;
if ($tempLength == 2) {
$busySlots[$tempSlot] = 1;
}
if ($tempLength == 3) {
$busySlots[$tempSlot] = 1;
$busySlots[$tempSlot + 1] = 1;
}
}
// Now check if the current slot and length combo coincides with the already accepted ones
$coincides = false;
if ($busySlots[$slot - 1] == 1) {
$coincides = true;
} else if ($length == 2 && $busySlots[$slot] == 1) {
$coincides = true;
} else if ($length == 3 && ($busySlots[$slot] == 1 || $busySlots[$slot + 1] == 1)) {
$coincides = true;
}
// If the timing coincides, then a class has already been accepted
if ($coincides) {
// Set the error message and echo it
$response = new AcceptRequestResponse();
$response->successful = false;
$response->errorCode = "alreadyaccepted";
echo (json_encode($response));
return;
}
// No error, so udpate the extra request table
$updateExtraQuery = "UPDATE db_classroom_management.tbl_extra_schedule SET accept_status = 'ACCEPTED' WHERE room_id = $roomID AND course_id = $courseID AND day_of_week = $dayOfWeek AND slot = $slot AND request_type = 'EXTRA'";
$updateResult = mysqli_query($conn, $updateExtraQuery);
if ($updateResult) {
// Set the success message and echo it
$response = new AcceptRequestResponse();
$response->successful = true;
$response->errorCode = "none";
// Email the user
//Run query for login authorization
$checkEmailQuery = "SELECT * FROM db_classroom_management.tbl_login_accounts where account_id = $userID";
$checkEmailQueryResult = mysqli_query($conn, $checkEmailQuery);
//Handle login authorization response
$numberOfRows = mysqli_num_rows($checkEmailQueryResult);
if ($numberOfRows == 1) {
$row = mysqli_fetch_assoc($checkEmailQueryResult);
// Converting day of week from 1-5 to Monday-Friday
$day = "";
switch ($dayOfWeek) {
case 1:
$day = "Monday";
break;
case 2:
$day = "Tuesday";
break;
case 3:
$day = "Wednesday";
break;
case 4:
$day = "Thursday";
break;
case 5:
$day = "Friday";
break;
}
//Email Sending
$to = $row["email_address"];
$subject = "Follow up for your cancel request.";
$message = "Hello Sir/Miss! \r\n";
$message .= "You recently requested an extra class in Room $roomID, on $day, in slot $slot for $length credit hour(s)\r\n";
$message .= "We would like to update you that your request has been accepted.\r\n";
$message .= "Kind Regards.";
$header = "From:[email protected] \r\n";
$header .= "MIME-Version: 1.0\r\n";
$header .= "Content-type: text/html\r\n";
$retval = mail($to, $subject, $message, $header);
if ($retval == true) {
$response->emailed = true;
}
}
echo (json_encode($response));
return;
} else {
// Set the error message and echo it
$response = new AcceptRequestResponse();
$response->successful = false;
$response->errorCode = "unknown";
echo (json_encode($response));
return;
}
} else {
// Find the id of this entry in week schedule table
$getScheduleID = "SELECT schedule_id FROM db_classroom_management.tbl_schedule WHERE room_id = $roomID AND day_of_week = $dayOfWeek AND slot = $slot";
$getScheduleIDResult = mysqli_query($conn, $getScheduleID);
// Retrieve the ID from result
$temp = mysqli_fetch_assoc($getScheduleIDResult);
$scheduleID = $temp['schedule_id'];
// Delete the entry from week schedule table
$deleteQuery = "DELETE FROM db_classroom_management.tbl_week_schedule WHERE schedule_id = $scheduleID";
$deleteQueryResult = mysqli_query($conn, $deleteQuery);
// if the record was successfully deleted, run the update query
if ($deleteQueryResult) {
$updateCancelQuery = "UPDATE db_classroom_management.tbl_extra_schedule SET accept_status = 'ACCEPTED' WHERE room_id = $roomID AND day_of_week = $dayOfWeek AND slot = $slot AND request_type = 'CANCEL'";
$updateCancelQueryResult = mysqli_query($conn, $updateCancelQuery);
if ($updateCancelQuery) {
// Set the success message and echo it
$response = new AcceptRequestResponse();
$response->successful = true;
$response->errorCode = "none";
// Email the user
//Run query for login authorization
$checkEmailQuery = "SELECT * FROM db_classroom_management.tbl_login_accounts where account_id = $userID";
$checkEmailQueryResult = mysqli_query($conn, $checkEmailQuery);
//Handle login authorization response
$numberOfRows = mysqli_num_rows($checkEmailQueryResult);
if ($numberOfRows == 1) {
$row = mysqli_fetch_assoc($checkEmailQueryResult);
// Converting day of week from 1-5 to Monday-Friday
$day = "";
switch ($dayOfWeek) {
case 1:
$day = "Monday";
break;
case 2:
$day = "Tuesday";
break;
case 3:
$day = "Wednesday";
break;
case 4:
$day = "Thursday";
break;
case 5:
$day = "Friday";
break;
}
//Email Sending
$to = $row["email_address"];
$subject = "Follow up for your cancel request.";
$message = "Hello Sir/Miss! \r\n";
$message .= "You recently requested to cancel your class held in in Room $roomID, on $day, in slot $slot for $length credit hour(s)\r\n";
$message .= "We would like to update you that your class has been cancelled.\r\n";
$message .= "Kind Regards.";
$header = "From:[email protected] \r\n";
$header .= "MIME-Version: 1.0\r\n";
$header .= "Content-type: text/html\r\n";
$retval = mail($to, $subject, $message, $header);
if ($retval == true) {
$response->emailed = true;
}
}
echo (json_encode($response));
return;
}
} else {
// Set the error message and echo it
$response = new AcceptRequestResponse();
$response->successful = false;
$response->errorCode = "unknown";
echo (json_encode($response));
return;
}
}
?>