/**
  * Class constructor (initializes gettext)
  * @param string $forcedLocale The locale that has to be used instead of the configured one
  */
 public function __construct($locale = TranslationTool::DEFAULT_LOCALE)
 {
     if ($locale == NULL && !TranslationTool::isTranslationAllowed()) {
         throw new TranslationException('Unable to set locale in an other context than web');
     }
     // TODO: check locale from broswer, session, registration params...
     $this->setLocale(TranslationTool::getLocaleFromLanguage($locale));
 }
/**
 * Exception handler
 * @param Exception $exception The exception raised
 */
function exceptionHandler($exception)
{
    try {
        $exceptionMessage = NULL;
        // If a transaction is in progress, rollback it
        if (DatabaseFactory::isTransactionInProgress()) {
            DatabaseFactory::rollback();
        }
        // logs exception before doing anything else, for logs to be filled even if an exception will occur during the exception treatment
        $logInstance = LogTool::getInstance();
        // debug exception in web context
        if ($exception instanceof GenericWarningException) {
            // logs warning
            $logInstance->logException($exception, LogTool::WARNING_LEVEL);
        } else {
            // logs error
            $logInstance->logException($exception);
        }
        $exceptionClass = get_class($exception);
        if ($exception instanceof GenericException) {
            // Displays message
            if (TranslationTool::isTranslationAllowed()) {
                $exceptionMessage = $exception->getUserLocalizedMessage();
            } else {
                $exceptionMessage = $exception->getMessage();
            }
        } else {
            // If error is not managed, displays generic message
            $exceptionMessage = 'GENERIC_EXCEPTION';
        }
        if (SystemTool::isAjaxContext()) {
            echo json_encode(array('error' => $exceptionMessage), true);
        } else {
            echo $exceptionMessage;
        }
    } catch (Exception $e) {
        echo $e->getMessage();
        try {
            LogTool::getInstance()->logException($e);
            echo $exceptionClass . ' raised : ' . $exceptionMessage;
            echo '+ ' . get_class($e) . ' while handling exception : ' . $e->getMessage();
            exit(LogTool::KO_RETURN_CODE);
        } catch (Exception $e2) {
            try {
                LogTool::getInstance()->logException($e2);
                echo $exceptionClass . ' raised (unable to display exception details)';
                exit(LogTool::KO_RETURN_CODE);
            } catch (Exception $e3) {
                echo 'unable to display exception details';
                exit;
            }
        }
    }
}
 public static function getLoginErrorMessage()
 {
     return TranslationTool::getInstance()->translate('Login ou mot de passe incorrect');
 }
 /**
  * Returns a localized error message corresponding to current exception
  * @return string The localized exception message
  */
 public function getUserLocalizedMessage()
 {
     return TranslationTool::getInstance()->translate(StringTool::upper(preg_replace('/(?<=[a-z])([A-Z])/', '_$1', get_class($this))));
 }
<?php

// Starts session before header is sent
session_start();
header('Content-type:application/json');
require_once 'globals/globals.php';
// Gets class_loader
require_once 'class_loader.inc.php';
// Gets error handler
require_once 'error_handler.inc.php';
$language = 'fr';
$t = TranslationTool::getInstance($language);
SystemTool::$context = SystemTool::CONTEXT_AJAX;
// starts transaction
DatabaseFactory::startTransaction();
$authenticationInstance = AuthenticationTool::getInstance();
if (!$authenticationInstance->isPlayerConnected()) {
    throw new PlayerNotConnectedException();
}
if (!RequestTool::isAjaxRequest()) {
    throw new Exception();
}