<?php
include "Functions.php";
$filepath = "./user_data.dat";
//$Master_user_array = array(
//$user1 = array('username' => "john", 'password' => "doe", 'email' => 'johndoe@hawaii.edu'));
//array_to_arrayfile($Master_user_array, $filepath);

$Master_user_array = arrayfile_to_array($filepath);

$usernameErr = $emailErr = $passwordErr = $cpasswordErr =  "";
$username = $email = $password = $cpassword ="";

$no_errors = true;
     // checking if user input new items
if(array_key_exists('create', $_POST)){
   $newname = $_POST['username'];

  if (empty($_POST["username"])) {
    $usernameErr = "Username is required";
    $no_errors = false;
  } else {
    $username = test_input($_POST["username"]);
    // check if name only contains letters and whitespace
    if (!preg_match("/^[a-zA-Z0-9 ]*$/",$username)) {
      $usernameErr = "Only letters, numbers and white space allowed";
      $no_errors = false;
    }
  }
  if (array_key_exists($newname, $Master_user_array)){
          $usernameErr = "Username already exists";
          $no_errors = false;
  }
    if(empty($_POST["password"])){
        $passwordErr = "Password is required";
        $no_errors = false;
}
if (strlen($_POST["password"]) <'6') {
        $passwordErr = "Your Password Must Contain At Least 6 Characters!";
        $no_errors = false;
    }
 else {
    $password = test_input($_POST["password"]);
    $cpassword = test_input($_POST["cpassword"]);
}
if(($_POST["password"] !== $_POST["cpassword"])) {
    $cpasswordErr = "Passwords do not match";
    $no_errors = false;
    }


  if (empty($_POST["email"])) {
    $emailErr = "Email is required";
    $no_errors = false;
  } else {
    $email = test_input($_POST["email"]);
    // check if e-mail address is well-formed
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
      $emailErr = "Invalid email format";
      $no_errors = false;
    }
  }
    if ($no_errors == true){
        $new_users = array('username' => $_POST['username'], 'password' => $_POST['password'], 'email' => $_POST['email']);
        $Master_user_array[strtolower($new_users['username'])] = $new_users;// convert to lower case, name of individual user data array in
        array_to_arrayfile($Master_user_array, $filepath);


    }
}




function test_input($data) {
  $data = trim($data);
  $data = stripslashes($data);
  $data = htmlspecialchars($data);
  return $data;
}
?>

<h2>Create A New User</h2>
<p><span class="error">* required field.</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
  Username: <input type="text" name="username" value="<?php echo $username;?>">
  <span class="error">* <?php echo $usernameErr;?></span>
  <br><br>
  Password: <input type="password" name="password" value="<?php echo $password;?>">
  <span class="error">* <?php echo $passwordErr;?></span>
  <br><br>
  Confirm Password: <input type="password" name="cpassword" value="<?php echo $cpassword;?>">
  <span class="error">* <?php echo $cpasswordErr;?></span>
  <br><br>
  E-mail: <input type="text" name="email" value="<?php echo $email;?>">
  <span class="error">* <?php echo $emailErr;?></span>
  <br><br>

  <br><br>
  <input type="submit" name="create" value="Create">
</form>