<?php

/**

*

* Copyright (C) 2015-2019 FeatherBB

* based on code by (C) 2008-2015 FluxBB

* and Rickard Andersson (C) 2002-2008 PunBB

* License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher

*

* $app = new \Slim\Slim();

* $app->add(new \Slim\Extras\Middleware\FeatherBBLoader(array $config));

*

*/

namespace FeatherBB\Middleware;

use Dotenv\Dotenv;

use FeatherBB\Core\Database as DB;

use FeatherBB\Core\Error;

use FeatherBB\Core\Hooks;

use FeatherBB\Core\Interfaces\Cache;

use FeatherBB\Core\Interfaces\Config;

use FeatherBB\Core\Interfaces\Container;

use FeatherBB\Core\Interfaces\ForumEnv;

use FeatherBB\Core\Interfaces\ForumSettings;

use FeatherBB\Core\Interfaces\Lang;

use FeatherBB\Core\Parser;

use FeatherBB\Core\Plugin as PluginManager;

use FeatherBB\Core\Url;

use FeatherBB\Core\Utils;

use FeatherBB\Core\View;

class Core

{

protected $forumEnv;

protected $forumSettings;

protected $headers = [

'Cache-Control' => 'no-cache, no-store, must-revalidate',

'Pragma' => 'no-cache',

'Content-type' => 'text/html',

'X-Frame-Options' => 'deny'];

public function __construct()

{

// Define some core variables

$this->forumEnv['FEATHER_ROOT'] = realpath(dirname(__FILE__).'/../../').'/';

try {

$dotenv = Dotenv::create($this->forumEnv['FEATHER_ROOT']);

$dotenv->load();

} catch (\Dotenv\Exception\InvalidPathException $e) {}

$this->forumEnv['FORUM_CACHE_DIR'] = is_writable($this->forumEnv['FEATHER_ROOT'].'cache') ? realpath($this->forumEnv['FEATHER_ROOT'].'cache').'/' : null;

$this->forumEnv['FORUM_CONFIG_FILE'] = $this->forumEnv['FEATHER_ROOT'].'.env';

$this->forumEnv['FEATHER_DEBUG'] = $this->forumEnv['FEATHER_SHOW_QUERIES'] = (getenv('DEBUG') == 'all' || filter_var(getenv('DEBUG'), FILTER_VALIDATE_BOOLEAN) == true);

$this->forumEnv['FEATHER_SHOW_INFO'] = (getenv('DEBUG') == 'info' || getenv('DEBUG') == 'all');

if ($this->forumEnv['FEATHER_DEBUG']) {

error_reporting(E_ALL); // Let's report everything for development

ini_set('display_errors', 1);

}

// Populate forum_env

$this->forumEnv = array_merge(self::loadDefaultForumEnv(), $this->forumEnv);

// Force POSIX locale (to prevent functions such as strtolower() from messing up UTF-8 strings)

setlocale(LC_CTYPE, 'C');

}

public static function loadDefaultForumEnv()

{

return [

'FEATHER_ROOT' => '',

'FORUM_CONFIG_FILE' => '.env',

'FORUM_CACHE_DIR' => 'cache/',

'FORUM_VERSION' => '1.0.0-beta.5',

'FORUM_NAME' => 'FeatherBB',

'FORUM_DB_REVISION' => 21,

'FORUM_SI_REVISION' => 2,

'FORUM_PARSER_REVISION' => 2,

'FEATHER_UNVERIFIED' => 0,

'FEATHER_ADMIN' => 1,

'FEATHER_MOD' => 2,

'FEATHER_GUEST' => 3,

'FEATHER_MEMBER' => 4,

'FEATHER_MAX_POSTSIZE' => 32768,

'FEATHER_SEARCH_MIN_WORD' => 3,

'FEATHER_SEARCH_MAX_WORD' => 20,

'FEATHER_DEBUG' => false,

'FEATHER_SHOW_QUERIES' => false,

'FEATHER_SHOW_INFO' => false,

'DB_TYPE' => getenv('DB_TYPE'),

'DB_HOST' => getenv('DB_HOST'),

'DB_NAME' => getenv('DB_NAME'),

'DB_PREFIX' => getenv('DB_PREFIX'),

'DB_USER' => getenv('DB_USER'),

'DB_PASS' => getenv('DB_PASS'),

'COOKIE_NAME' => getenv('COOKIE_NAME'),

'JWT_TOKEN' => getenv('JWT_TOKEN'),

'JWT_ALGORITHM' => getenv('JWT_ALGORITHM')

];

}

public static function initDb($log_queries = false)

{

switch (ForumEnv::get('DB_TYPE')) {

case 'mysql':

if (!extension_loaded('pdo_mysql')) {

throw new Error('Driver pdo_mysql not installed.', 500, false, false, true);

}

DB::configure('mysql:host='.ForumEnv::get('DB_HOST').';dbname='.ForumEnv::get('DB_NAME'));

DB::configure('driver_options', [\PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8']);

break;

case 'sqlite':

case 'sqlite3':

if (!extension_loaded('pdo_sqlite')) {

throw new Error('Driver pdo_mysql not installed.', 500, false, false, true);

}

DB::configure('sqlite:./'.ForumEnv::get('DB_NAME'));

break;

case 'pgsql':

if (!extension_loaded('pdo_pgsql')) {

throw new Error('Driver pdo_mysql not installed.', 500, false, false, true);

}

DB::configure('pgsql:host='.ForumEnv::get('DB_HOST').'dbname='.ForumEnv::get('DB_NAME'));

break;

}

DB::configure('username', ForumEnv::get('DB_USER'));

DB::configure('password', ForumEnv::get('DB_PASS'));

DB::configure('prefix', ForumEnv::get('DB_PREFIX'));

if ($log_queries) {

DB::configure('logging', true);

}

DB::configure('id_column_overrides', [

ForumEnv::get('DB_PREFIX').'groups' => 'g_id',

]);

}

public static function loadPlugins()

{

$manager = new PluginManager();

$manager->loadPlugins();

}

// Headers

protected function setHeaders($res)

{

foreach ($this->headers as $label => $value) {

$res = $res->withHeader($label, $value);

}

$res = $res->withHeader('X-Powered-By', $this->forumEnv['FORUM_NAME']);

return $res;

}

public function __invoke($req, $res, $next)

{

// Set headers

$res = $this->setHeaders($res);

// Block prefetch requests

if ((isset($_SERVER['HTTP_X_MOZ'])) && ($_SERVER['HTTP_X_MOZ'] == 'prefetch')) {

$res = $res->withStatus(403);

return $next($req, $res);

}

// Populate Slim object with forum_env vars

Container::set('forum_env', $this->forumEnv);

// Load FeatherBB utils class

Container::set('utils', function ($container) {

return new Utils();

});

// Record start time

Container::set('start', Utils::getMicrotime());

// Define now var

Container::set('now', function () {

return time();

});

// Load FeatherBB cache

Container::set('cache', function ($container) {

$path = $this->forumEnv['FORUM_CACHE_DIR'];

return new \FeatherBB\Core\Cache(['name' => 'feather',

'path' => $path,

'extension' => '.cache.php']);

});

// Load FeatherBB permissions

Container::set('perms', function ($container) {

return new \FeatherBB\Core\Permissions();

});

// Load FeatherBB preferences

Container::set('prefs', function ($container) {

return new \FeatherBB\Core\Preferences();

});

// Load FeatherBB view

Container::set('template', function ($container) {

return new View();

});

// Load FeatherBB url class

Container::set('url', function ($container) {

return new Url();

});

// Load FeatherBB hooks

Container::set('hooks', function ($container) {

return new Hooks();

});

Container::set('parser', function ($container) {

return new Parser();

});

// Set cookies

Container::set('cookie', function ($container) {

$request = $container->get('request');

return new \Slim\Http\Cookies($request->getCookieParams());

});

Container::set('flash', function ($c) {

return new \Slim\Flash\Messages;

});

// This is the very first hook fired

\FeatherBB\Core\Interfaces\Hooks::fire('core.start');

if (!is_file(ForumEnv::get('FORUM_CONFIG_FILE'))) {

// Reset cache

Cache::flush();

$installer = new \FeatherBB\Controller\Install();

return $installer->run();

}

// Init DB and configure Slim

self::initDb(ForumEnv::get('FEATHER_SHOW_INFO'));

Config::set('displayErrorDetails', ForumEnv::get('FEATHER_DEBUG'));

// Ensure cached forum data exist

if (!Cache::isCached('config')) {

$config = array_merge(\FeatherBB\Model\Cache::getConfig(), \FeatherBB\Model\Cache::getPreferences());

Cache::store('config', $config);

}

if (!Cache::isCached('permissions')) {

Cache::store('permissions', \FeatherBB\Model\Cache::getPermissions());

}

if (!Cache::isCached('group_preferences')) {

Cache::store('group_preferences', \FeatherBB\Model\Cache::getGroupPreferences());

}

// Finalize forum_settings array

$this->forumSettings = Cache::retrieve('config');

Container::set('forum_settings', $this->forumSettings);

Lang::construct();

// Run activated plugins

self::loadPlugins();

// Define time formats and add them to the container

Container::set('forum_time_formats', [ForumSettings::get('time_format'), 'H:i:s', 'H:i', 'g:i:s a', 'g:i a']);

Container::set('forum_date_formats', [ForumSettings::get('date_format'), 'Y-m-d', 'Y-d-m', 'd-m-Y', 'm-d-Y', 'M j Y', 'jS M Y']);

// Check if we have DOM support (not installed by default in PHP >= 7.0, results in utf8_decode not defined

if (!function_exists('utf8_decode')) {

throw new Error('Please install the php7.0-xml package.', 500, false, false, true);

}

return $next($req, $res);

}

}