update_task.php

<?php
header('Content-type:application/json;charset=utf-8');
/**
 * This script is to be used to receive a POST with the object information and then either updates, creates or deletes the task object
 */
require('Task.class.php');
// Assignment: Implement this script

$message = 'You either tried accessing this directly or submitted an invalid action. Please trying saving the form again';
$success = false;

if (isset($_POST)) {

    $action = filter_input(INPUT_POST, 'action', FILTER_SANITIZE_STRING);
    $taskId = filter_input(INPUT_POST, 'task_id', FILTER_SANITIZE_NUMBER_INT);
    $taskClass = new Task($taskId);

    switch ($action) {
        case 'save' :

            $taskName = filter_input(INPUT_POST, 'task_name', FILTER_SANITIZE_STRING);
            $taskDescription = filter_input(INPUT_POST, 'task_description', FILTER_SANITIZE_STRING);

            $taskClass->setTaskName($taskName);
            $taskClass->setDescription($taskDescription);
            $taskClass->Save();
            $success = true;
            $message = 'Task has been successfully created/updated';
            break;

        case 'delete' :
            $deleted = $taskClass->Delete();
            $message = "Something went wrong, couldn't delete task";
            if ($deleted) {
                $success = true;
                $message = "Task has been successfully deleted";
            }
            break;

        default :
            $message = 'Unknown action selected';

    }
}

echo json_encode(['message' => $message, 'success' => $success]);
exit;