push_progress.php

<?php

include 'modules/common/userlist_build.php';
include 'modules/common/check_login.php';
include 'modules/get_ids.php';

session_start();

if(valid_login()) {
  
  $_SESSION['save_success'] = false;
  
  $id_array = get_work_ids(); 
  
  if ( isset($_POST['progress']) && empty(array_diff($_POST['progress'], $id_array)) ) { // checks if only valid work IDs are being saved
    if ( isset($_POST['username']) && valid_user($_POST['username']) ) { // checks if user is valid
      
      $progress = $_POST['progress'];
      $user = $_POST['username'];
      
      $handle = fopen("data/progress/$user", "w");
      fwrite($handle, implode(',', $progress));
      
      $_SESSION['save_success'] = true;
      
      setcookie("user", $user); // always return to user that the work has been saved for to avoid confusion
      
    }
  }
  
}

header("Location: main.php");
exit();

 ?>