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thomas.guiseppin
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278
code/web/backend/application/model/RegistrationModel.php
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278
code/web/backend/application/model/RegistrationModel.php
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<?php
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/**
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* Class RegistrationModel
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*
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* Everything registration-related happens here.
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*/
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class RegistrationModel
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{
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/**
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* Handles the entire registration process for DEFAULT users (not for people who register with
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* 3rd party services, like facebook) and creates a new user in the database if everything is fine
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*
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* @return boolean Gives back the success status of the registration
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*/
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public static function registerNewUser()
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{
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// TODO this could be written simpler and cleaner
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// clean the input
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$user_name = strip_tags(Request::post('user_name'));
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$user_email = strip_tags(Request::post('user_email'));
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$user_password_new = Request::post('user_password_new');
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$user_password_repeat = Request::post('user_password_repeat');
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// stop registration flow if registrationInputValidation() returns false (= anything breaks the input check rules)
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$validation_result = RegistrationModel::registrationInputValidation(Request::post('captcha'), $user_name, $user_password_new, $user_password_repeat, $user_email);
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if (!$validation_result) {
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return false;
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}
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// crypt the password with the PHP 5.5's password_hash() function, results in a 60 character hash string.
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// @see php.net/manual/en/function.password-hash.php for more, especially for potential options
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$user_password_hash = password_hash($user_password_new, PASSWORD_DEFAULT);
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// check if username already exists
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if (UserModel::doesUsernameAlreadyExist($user_name)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_USERNAME_ALREADY_TAKEN'));
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return false;
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}
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// check if email already exists
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if (UserModel::doesEmailAlreadyExist($user_email)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_USER_EMAIL_ALREADY_TAKEN'));
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return false;
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}
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// generate random hash for email verification (40 char string)
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$user_activation_hash = sha1(uniqid(mt_rand(), true));
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// write user data to database
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if (!RegistrationModel::writeNewUserToDatabase($user_name, $user_password_hash, $user_email, time(), $user_activation_hash)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_ACCOUNT_CREATION_FAILED'));
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}
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// get user_id of the user that has been created, to keep things clean we DON'T use lastInsertId() here
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$user_id = UserModel::getUserIdByUsername($user_name);
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if (!$user_id) {
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Session::add('feedback_negative', Text::get('FEEDBACK_UNKNOWN_ERROR'));
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return false;
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}
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// send verification email
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if (RegistrationModel::sendVerificationEmail($user_id, $user_email, $user_activation_hash)) {
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Session::add('feedback_positive', Text::get('FEEDBACK_ACCOUNT_SUCCESSFULLY_CREATED'));
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return true;
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}
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// if verification email sending failed: instantly delete the user
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RegistrationModel::rollbackRegistrationByUserId($user_id);
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Session::add('feedback_negative', Text::get('FEEDBACK_VERIFICATION_MAIL_SENDING_FAILED'));
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return false;
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}
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/**
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* Validates the registration input
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*
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* @param $captcha
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* @param $user_name
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* @param $user_password_new
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* @param $user_password_repeat
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* @param $user_email
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*
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* @return bool
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*/
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public static function registrationInputValidation($captcha, $user_name, $user_password_new, $user_password_repeat, $user_email)
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{
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// perform all necessary checks
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if (!CaptchaModel::checkCaptcha($captcha)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_CAPTCHA_WRONG'));
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return false;
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}
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// if username, email and password are all correctly validated
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if (self::validateUserName($user_name) AND self::validateUserEmail($user_email) AND self::validateUserPassword($user_password_new, $user_password_repeat)) {
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return true;
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}
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// otherwise, return false
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return false;
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}
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/**
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* Validates the username
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*
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* @param $user_name
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* @return bool
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*/
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public static function validateUserName($user_name)
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{
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if (empty($user_name)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_USERNAME_FIELD_EMPTY'));
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return false;
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}
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// if username is too short (2), too long (64) or does not fit the pattern (aZ09)
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if (!preg_match('/^[a-zA-Z0-9]{2,64}$/', $user_name)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_USERNAME_DOES_NOT_FIT_PATTERN'));
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return false;
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}
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return true;
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}
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/**
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* Validates the email
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*
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* @param $user_email
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* @return bool
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*/
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public static function validateUserEmail($user_email)
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{
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if (empty($user_email)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_EMAIL_FIELD_EMPTY'));
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return false;
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}
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// validate the email with PHP's internal filter
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// side-fact: Max length seems to be 254 chars
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// @see http://stackoverflow.com/questions/386294/what-is-the-maximum-length-of-a-valid-email-address
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if (!filter_var($user_email, FILTER_VALIDATE_EMAIL)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_EMAIL_DOES_NOT_FIT_PATTERN'));
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return false;
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}
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return true;
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}
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/**
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* Validates the password
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*
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* @param $user_password_new
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* @param $user_password_repeat
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* @return bool
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*/
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public static function validateUserPassword($user_password_new, $user_password_repeat)
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{
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if (empty($user_password_new) OR empty($user_password_repeat)) {
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Session::add('feedback_negative', Text::get('FEEDBACK_PASSWORD_FIELD_EMPTY'));
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return false;
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}
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if ($user_password_new !== $user_password_repeat) {
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Session::add('feedback_negative', Text::get('FEEDBACK_PASSWORD_REPEAT_WRONG'));
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return false;
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}
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if (strlen($user_password_new) < 6) {
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Session::add('feedback_negative', Text::get('FEEDBACK_PASSWORD_TOO_SHORT'));
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return false;
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}
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return true;
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}
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/**
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* Writes the new user's data to the database
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*
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* @param $user_name
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* @param $user_password_hash
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* @param $user_email
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* @param $user_creation_timestamp
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* @param $user_activation_hash
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*
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* @return bool
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*/
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public static function writeNewUserToDatabase($user_name, $user_password_hash, $user_email, $user_creation_timestamp, $user_activation_hash)
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{
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$database = DatabaseFactory::getFactory()->getConnection();
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// write new users data into database
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$sql = "INSERT INTO users (user_name, user_password_hash, user_email, user_creation_timestamp, user_activation_hash, user_provider_type)
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VALUES (:user_name, :user_password_hash, :user_email, :user_creation_timestamp, :user_activation_hash, :user_provider_type)";
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$query = $database->prepare($sql);
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$query->execute(array(':user_name' => $user_name,
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':user_password_hash' => $user_password_hash,
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':user_email' => $user_email,
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':user_creation_timestamp' => $user_creation_timestamp,
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':user_activation_hash' => $user_activation_hash,
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':user_provider_type' => 'DEFAULT'));
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$count = $query->rowCount();
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if ($count == 1) {
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return true;
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}
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return false;
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}
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/**
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* Deletes the user from users table. Currently used to rollback a registration when verification mail sending
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* was not successful.
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*
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* @param $user_id
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*/
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public static function rollbackRegistrationByUserId($user_id)
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{
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$database = DatabaseFactory::getFactory()->getConnection();
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$query = $database->prepare("DELETE FROM users WHERE user_id = :user_id");
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$query->execute(array(':user_id' => $user_id));
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}
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/**
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* Sends the verification email (to confirm the account).
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* The construction of the mail $body looks weird at first, but it's really just a simple string.
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*
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* @param int $user_id user's id
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* @param string $user_email user's email
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* @param string $user_activation_hash user's mail verification hash string
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*
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* @return boolean gives back true if mail has been sent, gives back false if no mail could been sent
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*/
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public static function sendVerificationEmail($user_id, $user_email, $user_activation_hash)
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{
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$body = Config::get('EMAIL_VERIFICATION_CONTENT') . Config::get('URL') . Config::get('EMAIL_VERIFICATION_URL')
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. '/' . urlencode($user_id) . '/' . urlencode($user_activation_hash);
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$mail = new Mail;
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$mail_sent = $mail->sendMail($user_email, Config::get('EMAIL_VERIFICATION_FROM_EMAIL'),
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Config::get('EMAIL_VERIFICATION_FROM_NAME'), Config::get('EMAIL_VERIFICATION_SUBJECT'), $body
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);
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if ($mail_sent) {
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Session::add('feedback_positive', Text::get('FEEDBACK_VERIFICATION_MAIL_SENDING_SUCCESSFUL'));
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return true;
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} else {
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Session::add('feedback_negative', Text::get('FEEDBACK_VERIFICATION_MAIL_SENDING_ERROR') . $mail->getError() );
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return false;
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}
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}
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/**
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* checks the email/verification code combination and set the user's activation status to true in the database
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*
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* @param int $user_id user id
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* @param string $user_activation_verification_code verification token
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*
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* @return bool success status
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*/
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public static function verifyNewUser($user_id, $user_activation_verification_code)
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{
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$database = DatabaseFactory::getFactory()->getConnection();
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$sql = "UPDATE users SET user_active = 1, user_activation_hash = NULL
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WHERE user_id = :user_id AND user_activation_hash = :user_activation_hash LIMIT 1";
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$query = $database->prepare($sql);
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$query->execute(array(':user_id' => $user_id, ':user_activation_hash' => $user_activation_verification_code));
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if ($query->rowCount() == 1) {
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Session::add('feedback_positive', Text::get('FEEDBACK_ACCOUNT_ACTIVATION_SUCCESSFUL'));
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return true;
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}
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Session::add('feedback_negative', Text::get('FEEDBACK_ACCOUNT_ACTIVATION_FAILED'));
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return false;
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}
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}
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