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<?php
// src/FormValidation.php
class FormValidation
{
private array $data; // tableau associatif (probablement $_POST)
private string $validation_strategy; // à remplacer plus tard par un objet (pattern stratégie) d'interface ValidationStrategy
private array $errors;
private bool $validated = false;
public function __construct(array $data, string $validation_strategy){
$this->data = $data;
$this->validation_strategy = $validation_strategy;
}
public function validate(): bool
{
$this->errors = [];
// pattern stratégie en une seule classe
switch($this->validation_strategy){
case 'email':
$this->emailStrategy();
break;
case 'create_user':
$this->createUserStrategy();
break;
case 'connection':
$this->connectionStrategy();
break;
case 'username_update':
$this->usernameUpdateStrategy();
break;
case 'password_update':
$this->passwordUpdateStrategy();
break;
default:
http_response_code(500); // c'est un peu comme jeter une exception
echo json_encode(['success' => false, 'error' => 'server_error']);
die;
}
$this->validated = true;
return empty($this->errors);
}
public function getErrors(): array
{
return $this->errors;
}
public function getField(string $field): string
{
return $this->validated ? $this->data[$field] : '';
}
// méthodes de validation
private function captchaValidate(bool $clean_session = true): void
{
$captcha_solution = (isset($_SESSION['captcha']) && is_int($_SESSION['captcha'])) ? $_SESSION['captcha'] : 0;
$captcha_try = isset($this->data['captcha']) ? Captcha::controlInput($this->data['captcha']) : 0;
if($clean_session){
unset($_SESSION['captcha']);
}
if($captcha_try == 0){
$error = 'error_non_valid_captcha';
}
elseif($captcha_solution == 0){ // ne peut pas arriver, si?
$error = 'captcha_server_error';
}
elseif($captcha_try !== $captcha_solution){
$this->errors[] = 'bad_solution_captcha';
}
}
// erreurs à la création des mots de passe
static private function removeSpacesTabsCRLF(string $chaine): string
{
$cibles = [' ', "\t", "\n", "\r"]; // doubles quotes !!
return(str_replace($cibles, '', $chaine));
}
// stratégies
private function emailStrategy(): void
{
$this->captchaValidate(false);
if(!isset($this->data['name']) || empty($this->data['name'])
|| !isset($this->data['email']) || empty($this->data['email'])
|| !isset($this->data['message']) || empty($this->data['message'])
|| !isset($this->data['hidden']) || !empty($this->data['hidden'])){
$this->errors[] = 'missing_fields';
}
if(!filter_var(trim($this->data['email']), FILTER_VALIDATE_EMAIL)){
$this->errors[] = 'bad_email_address';
}
$this->data['name'] = htmlspecialchars(trim($this->data['name']));
$this->data['email'] = htmlspecialchars(trim($this->data['email']));
$this->data['message'] = htmlspecialchars($this->data['message']);
}
private function createUserStrategy(): void
{
$this->captchaValidate();
// test mauvais paramètres
if(!isset($this->data['login']) || empty($this->data['login'])
|| !isset($this->data['password']) || empty($this->data['password'])
|| !isset($this->data['password_confirmation']) || empty($this->data['password_confirmation'])
|| !isset($this->data['create_user_hidden']) || !empty($this->data['create_user_hidden']))
{
$this->errors[] = 'bad_login_or_password';
}
if($this->data['password'] !== $this->data['password_confirmation']){
$this->errors[] = 'different_passwords';
}
if($this->data['login'] !== self::removeSpacesTabsCRLF(htmlspecialchars($this->data['login']))
|| $this->data['password'] !== self::removeSpacesTabsCRLF(htmlspecialchars($this->data['password']))){
$this->errors[] = 'forbidden_characters';
}
}
private function connectionStrategy(): void
{
$this->captchaValidate();
if(!isset($this->data['login']) || empty($this->data['login'])
|| !isset($this->data['password']) || empty($this->data['password'])
|| !isset($this->data['connection_hidden']) || !empty($this->data['connection_hidden']))
{
$this->errors[] = 'bad_login_or_password';
}
}
private function usernameUpdateStrategy(): void
{
$this->captchaValidate();
if(!isset($this->data['login']) || empty($this->data['login'])
|| !isset($this->data['password']) || empty($this->data['password'])
|| !isset($this->data['new_login']) || empty($this->data['new_login'])
|| !isset($this->data['modify_username_hidden']) || !empty($this->data['modify_username_hidden']))
{
$this->errors[] = 'bad_login_or_password';
}
$new_login = self::removeSpacesTabsCRLF(htmlspecialchars($this->data['new_login']));
if($new_login !== $this->data['new_login']){
$this->errors[] = 'forbidden_characters';
}
if($this->data['login'] !== $_SESSION['user']){
$this->errors[] = 'bad_login_or_password';
}
if($this->data['login'] === $new_login){
$this->errors[] = 'same_username_as_before';
}
}
private function passwordUpdateStrategy(): void
{
$this->captchaValidate();
if(!isset($this->data['login']) || empty($this->data['login'])
|| !isset($this->data['password']) || empty($this->data['password'])
|| !isset($this->data['new_password']) || empty($this->data['new_password'])
|| !isset($this->data['modify_password_hidden']) || !empty($this->data['modify_password_hidden']))
{
$this->errors[] = 'bad_login_or_password';
}
$new_password = self::removeSpacesTabsCRLF(htmlspecialchars($this->data['new_password']));
if($new_password !== $this->data['new_password']){
$this->errors[] = 'forbidden_characters';
}
if($this->data['login'] !== $_SESSION['user']){
$this->errors[] = 'bad_login_or_password';
}
if($this->data['password'] === $new_password){
$this->errors[] = 'same_password_as_before';
}
}
}
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