<?php
require_once('connec.php');
$pdo = new \PDO(DSN, USER, PASS);

$query = "SELECT * FROM friend";
$statement = $pdo->query($query);
$friends = $statement->fetchAll();


$firstname = '';
$lastname = '';
$firstnameError = '';
$lastnameError ='';
$errors = 0;


if ($_SERVER["REQUEST_METHOD"] == "POST"){
	$firstname = test_input($_POST["firstname"]);
	$lastname = test_input($_POST["lastname"]);
}

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

if ($_SERVER["REQUEST_METHOD"] === "POST") {
	if (empty($_POST["firstname"])) {
		$firstnameError = "Firstname is required";
		$errors += 1;
	} else {
		$firstname = test_input($_POST["firstname"]);
		if (!preg_match("/^[a-zA-Z ]*$/", $firstname) || strlen($firstname) > 45) {
			$firstnameError = "Only letters and white space allowed";
			$errors += 1;
		}
	}
	if (empty($_POST["lastname"])) {
		$lastnameError = "Lastname is required";
		$errors += 1;
	} else {
		$lastname = test_input($_POST["lastname"]);
		if (!preg_match("/^[a-zA-Z ]*$/", $lastname)) {
			$lastnameError = "Only letters and white space allowed";
			$errors += 1;
		}
	}
	if ($errors=== 0) {
		$query = "INSERT INTO friend (firstname, lastname) VALUES (:firstname, :lastname)";
		$statement = $pdo->prepare($query);
		$statement->bindValue(':firstname', $lastname, \PDO::PARAM_STR);
		$statement->bindValue(':lastname', $lastname, \PDO::PARAM_STR);
        $statement -> execute();
        header('location: success.php');
    }
}
?>


<ul>
<?php foreach($friends as $friend) {?>
	<li> <?= $friend['firstname'] . ' ' . $friend['lastname'];}?>
</ul>


<form  action="index.php"  method="post">
	<div>
		<label  for="firstname">Firstname :</label>
		<input  type="text"  id="firstname"  name="firstname">
        <span class="error">*<?php echo $firstnameError;?></span>
    </div>
	<div>
		<label  for="lastname">Lastname :</label>
		<input  type="text"  id="lastname"  name="lastname">
        <span class="error">*<?php echo $lastnameError;?></span>
    </div>
        <button  type="submit">Send</button>
</form>