<?php
/**
 * Login page
 *
 * PHP version 7
 *
 * Copyright (C) Ere Maijala 2010-2021
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category MLInvoice
 * @package  MLInvoice\Base
 * @author   Ere Maijala <ere@labs.fi>
 * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
 * @link     http://labs.fi/mlinvoice.eng.php
 */
require_once 'vendor/autoload.php';

// buffered, so we can redirect later if necessary
ini_set('implicit_flush', 'Off');
ob_start();

if (!file_exists(__DIR__ . DIRECTORY_SEPARATOR . 'config.php')) {
    include_once 'setup.php';
    $setup = new Setup();
    $setup->initialSetup();
    exit();
}

require_once 'sessionfuncs.php';
require_once 'sqlfuncs.php';
require_once 'miscfuncs.php';
require_once 'config.php';
require_once 'htmlfuncs.php';

if (!session_id()) {
    session_start();
}

$strLogin = getPost('login', false);
$strPasswd = getPost('passwd', false);
$strCsrf = getPost('csrf', false);
$strLogon = getPost('logon', '');
$backlink = getPostOrQuery('backlink', '0');

if (defined('_UI_LANGUAGE_SELECTION_')) {
    $languages = [];
    foreach (explode('|', _UI_LANGUAGE_SELECTION_) as $lang) {
        $lang = explode('=', $lang, 2);
        $languages[$lang[0]] = $lang[1];
    }
    $language = getPostOrQuery('lang', '');
    if ($language && isset($languages[$language])) {
        $_SESSION['sesLANG'] = $language;
    }
}
if (!isset($_SESSION['sesLANG'])) {
    $_SESSION['sesLANG'] = defined('_UI_LANGUAGE_') ? _UI_LANGUAGE_ : 'fi-FI';
}

require_once 'translator.php';

switch (verifyDatabase()) {
case 'OK':
    break;
case 'UPGRADED':
    $upgradeMessage = Translator::translate('DatabaseUpgraded');
    break;
case 'FAILED':
    $upgradeFailed = true;
    $upgradeMessage = Translator::translate('DatabaseUpgradeFailed');
    break;
}

$strMessage = Translator::translate('WelcomeMessage');

if ($strLogon) {
    if ($strLogin && $strPasswd) {
        switch (sesCreateSession($strLogin, $strPasswd, $strCsrf)) {
        case 'OK':
            if ($backlink == '1' && isset($_SESSION['BACKLINK'])) {
                header('Location: ' . $_SESSION['BACKLINK']);
            } else {
                header('Location: index.php');
            }
            exit();
        case 'FAIL':
            $strMessage = Translator::translate('InvalidCredentials');
            break;
        case 'TIMEOUT':
            $strMessage = Translator::translate('LoginTimeout');
            break;
        }
    } else {
        $strMessage = Translator::translate('MissingFields');
    }
}

usleep(rand(500, 2000) * 1000);
$csrf = sesCreateCsrf();

echo htmlPageStart('', [], false);
?>

<body>
    <div class="pagewrapper login mb-4">
<?php

$actions = [];
if (isset($languages)) {
    foreach ($languages as $code => $name) {
        if ($code == $_SESSION['sesLANG']) {
            continue;
        }
        $actions[] = [
            'title' => htmlspecialchars($name),
            'link' => "login.php?lang=$code"
        ];
    }
}

createNavBar($actions, '');
if (isset($upgradeMessage)) {
    ?>
        <div class="message alert <?php echo isset($upgradeFailed) ? 'alert-danger' : 'alert-success'?>">
            <?php echo $upgradeMessage?>
        </div>
        <br />
    <?php
}
?>
        <div class="form login-form">
            <h1><?php echo Translator::translate('Welcome')?></h1>
            <p>
                <span id="loginmsg"><?php echo $strMessage?></span>
            </p>
            <form action="login.php" method="post" name="login_form">
                <input type="hidden" name="backlink" value="<?php echo $backlink?>">
                <input type="hidden" name="csrf" id="csrf" value="<?php echo $csrf?>">
                <p>
                    <span class="label">
                        <?php echo Translator::translate('UserID')?>
                    </span>
                    <input class="form-control medium" name="login" id="login" type="text" value="">
                </p>
                <p>
                    <span class="label">
                        <?php echo Translator::translate('Password')?>
                    </span>
                    <input class="form-control medium" name="passwd" id="passwd" type="password" value="">
                </p>
                <p>
                <input class="btn btn-primary" type="submit" name="logon"
                    value="<?php echo Translator::translate('Login')?>">
                </p>
<?php
if (getSetting('password_recovery')) {
    ?>
                <p>
                  <a href="recover.php">
                    <?php echo Translator::translate('ForgotPassword')?>
                  </a>
                </p>
    <?php
}
?>
            </form>
        </div>
    </div>
</body>
</html>
