1 files changed, 186 insertions, 0 deletions

diff --git a/src/FormValidation.php b/src/FormValidation.php
new file mode 100644
index 0000000..743cd13
--- /dev/null
+++ b/src/FormValidation.php
@@ -0,0 +1,186 @@
+<?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';
+                }
+        }
+}
\ No newline at end of file