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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Application\CMSApplicationInterface;
use Joomla\CMS\Cache\Cache;
use Joomla\CMS\Cache\CacheControllerFactoryInterface;
use Joomla\CMS\Client\ClientHelper;
use Joomla\CMS\Date\Date;
use Joomla\CMS\Document\Document;
use Joomla\CMS\Document\FactoryInterface;
use Joomla\CMS\Filesystem\Stream;
use Joomla\CMS\Input\Input;
use Joomla\CMS\Language\Language;
use Joomla\CMS\Language\LanguageFactoryInterface;
use Joomla\CMS\Log\Log;
use Joomla\CMS\Mail\Mail;
use Joomla\CMS\Mail\MailHelper;
use Joomla\CMS\Session\Session;
use Joomla\CMS\User\User;
use Joomla\Database\DatabaseDriver;
use Joomla\Database\DatabaseInterface;
use Joomla\DI\Container;
use Joomla\Registry\Registry;
use PHPMailer\PHPMailer\Exception as phpmailerException;

/**
 * Joomla Platform Factory class.
 *
 * @since  1.7.0
 */
abstract class Factory
{
	/**
	 * Global application object
	 *
	 * @var    CMSApplicationInterface
	 * @since  1.7.0
	 */
	public static $application = null;

/**
	 * Global cache object
	 *
	 * @var    Cache
	 * @since  1.7.0
	 */
	public static $cache = null;

/**
	 * Global configuration object
	 *
	 * @var         \JConfig
	 * @since       1.7.0
	 * @deprecated  5.0  Use the configuration object within the application
	 */
	public static $config = null;

/**
	 * Global container object
	 *
	 * @var    Container
	 * @since  4.0.0
	 */
	public static $container = null;

/**
	 * Container for Date instances
	 *
	 * @var    array
	 * @since  1.7.3
	 */
	public static $dates = array();

/**
	 * Global session object
	 *
	 * @var         Session
	 * @since       1.7.0
	 * @deprecated  5.0  Use the session service in the DI container
	 */
	public static $session = null;

/**
	 * Global language object
	 *
	 * @var         Language
	 * @since       1.7.0
	 * @deprecated  5.0  Use the language service in the DI container
	 */
	public static $language = null;

/**
	 * Global document object
	 *
	 * @var         Document
	 * @since       1.7.0
	 * @deprecated  5.0  Use the document service in the DI container
	 */
	public static $document = null;

/**
	 * Global database object
	 *
	 * @var         DatabaseDriver
	 * @since       1.7.0
	 * @deprecated  5.0  Use the database service in the DI container
	 */
	public static $database = null;

/**
	 * Global mailer object
	 *
	 * @var    Mail
	 * @since  1.7.0
	 */
	public static $mailer = null;

/**
	 * Get the global application object. When the global application doesn't exist, an exception is thrown.
	 *
	 * @return  CMSApplicationInterface object
	 *
	 * @since   1.7.0
	 * @throws  \Exception
	 */
	public static function getApplication()
	{
		if (!self::$application)
		{
			throw new \Exception('Failed to start application', 500);
		}

return self::$application;
	}

/**
	 * Get a configuration object
	 *
	 * Returns the global {@link \JConfig} object, only creating it if it doesn't already exist.
	 *
	 * @param   string  $file       The path to the configuration file
	 * @param   string  $type       The type of the configuration file
	 * @param   string  $namespace  The namespace of the configuration file
	 *
	 * @return  Registry
	 *
	 * @see         Registry
	 * @since       1.7.0
	 * @deprecated  5.0  Use the configuration object within the application.
	 */
	public static function getConfig($file = null, $type = 'PHP', $namespace = '')
	{
		@trigger_error(
			sprintf(
				'%s() is deprecated. The configuration object should be read from the application.',
				__METHOD__
			),
			E_USER_DEPRECATED
		);

/**
		 * If there is an application object, fetch the configuration from there.
		 * Check it's not null because LanguagesModel can make it null and if it's null
		 * we would want to re-init it from configuration.php.
		 */
		if (self::$application && self::$application->getConfig() !== null)
		{
			return self::$application->getConfig();
		}

if (!self::$config)
		{
			if ($file === null)
			{
				$file = JPATH_CONFIGURATION . '/configuration.php';
			}

self::$config = self::createConfig($file, $type, $namespace);
		}

return self::$config;
	}

/**
	 * Get a container object
	 *
	 * Returns the global service container object, only creating it if it doesn't already exist.
	 *
	 * This method is only suggested for use in code whose responsibility is to create new services
	 * and needs to be able to resolve the dependencies, and should therefore only be used when the
	 * container is not accessible by other means.  Valid uses of this method include:
	 *
	 * - A static `getInstance()` method calling a factory service from the container,
	 *   see `Joomla\CMS\Toolbar\Toolbar::getInstance()` as an example
	 * - An application front controller loading and executing the Joomla application class,
	 *   see the `cli/joomla.php` file as an example
	 * - Retrieving optional constructor dependencies when not injected into a class during a transitional
	 *   period to retain backward compatibility, in this case a deprecation notice should also be emitted to
	 *   notify developers of changes needed in their code
	 *
	 * This method is not suggested for use as a one-for-one replacement of static calls, such as
	 * replacing calls to `Factory::getDbo()` with calls to `Factory::getContainer()->get('db')`, code
	 * should be refactored to support dependency injection instead of making this change.
	 *
	 * @return  Container
	 *
	 * @since   4.0.0
	 */
	public static function getContainer(): Container
	{
		if (!self::$container)
		{
			self::$container = self::createContainer();
		}

return self::$container;
	}

/**
	 * Get a session object.
	 *
	 * Returns the global {@link Session} object, only creating it if it doesn't already exist.
	 *
	 * @param   array  $options  An array containing session options
	 *
	 * @return  Session object
	 *
	 * @see         Session
	 * @since       1.7.0
	 * @deprecated  5.0  Load the session service from the dependency injection container or via $app->getSession()
	 */
	public static function getSession(array $options = array())
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated. Load the session from the dependency injection container or via %2$s::getApplication()->getSession().',
				__METHOD__,
				__CLASS__
			),
			E_USER_DEPRECATED
		);

return self::getApplication()->getSession();
	}

/**
	 * Get a language object.
	 *
	 * Returns the global {@link Language} object, only creating it if it doesn't already exist.
	 *
	 * @return  Language object
	 *
	 * @see         Language
	 * @since       1.7.0
	 * @deprecated  5.0  Load the language service from the dependency injection container or via $app->getLanguage()
	 */
	public static function getLanguage()
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated. Load the language from the dependency injection container or via %2$s::getApplication()->getLanguage().',
				__METHOD__,
				__CLASS__
			),
			E_USER_DEPRECATED
		);

if (!self::$language)
		{
			self::$language = self::createLanguage();
		}

return self::$language;
	}

/**
	 * Get a document object.
	 *
	 * Returns the global {@link \Joomla\CMS\Document\Document} object, only creating it if it doesn't already exist.
	 *
	 * @return  Document object
	 *
	 * @see         Document
	 * @since       1.7.0
	 * @deprecated  5.0  Load the document service from the dependency injection container or via $app->getDocument()
	 */
	public static function getDocument()
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated. Load the document from the dependency injection container or via %2$s::getApplication()->getDocument().',
				__METHOD__,
				__CLASS__
			),
			E_USER_DEPRECATED
		);

if (!self::$document)
		{
			self::$document = self::createDocument();
		}

return self::$document;
	}

/**
	 * Get a user object.
	 *
	 * Returns the global {@link User} object, only creating it if it doesn't already exist.
	 *
	 * @param   integer  $id  The user to load - Can be an integer or string - If string, it is converted to ID automatically.
	 *
	 * @return  User object
	 *
	 * @see         User
	 * @since       1.7.0
	 * @deprecated  5.0  Load the user service from the dependency injection container or via $app->getIdentity()
	 */
	public static function getUser($id = null)
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated. Load the user from the dependency injection container or via %2$s::getApplication()->getIdentity().',
				__METHOD__,
				__CLASS__
			),
			E_USER_DEPRECATED
		);

$instance = self::getApplication()->getSession()->get('user');

if (\is_null($id))
		{
			if (!($instance instanceof User))
			{
				$instance = User::getInstance();
			}
		}
		// Check if we have a string as the id or if the numeric id is the current instance
		elseif (!($instance instanceof User) || \is_string($id) || $instance->id !== $id)
		{
			$instance = User::getInstance($id);
		}

return $instance;
	}

/**
	 * Get a cache object
	 *
	 * Returns the global {@link CacheController} object
	 *
	 * @param   string  $group    The cache group name
	 * @param   string  $handler  The handler to use
	 * @param   string  $storage  The storage method
	 *
	 * @return  \Joomla\CMS\Cache\CacheController object
	 *
	 * @see         Cache
	 * @since       1.7.0
	 * @deprecated  5.0 Use the cache controller factory instead
	 */
	public static function getCache($group = '', $handler = 'callback', $storage = null)
	{
		@trigger_error(
			sprintf(
				'%s() is deprecated. The cache controller should be fetched from the factory.',
				__METHOD__
			),
			E_USER_DEPRECATED
		);

$hash = md5($group . $handler . $storage);

if (isset(self::$cache[$hash]))
		{
			return self::$cache[$hash];
		}

$handler = ($handler === 'function') ? 'callback' : $handler;

$options = array('defaultgroup' => $group);

if (isset($storage))
		{
			$options['storage'] = $storage;
		}

$cache = self::getContainer()->get(CacheControllerFactoryInterface::class)->createCacheController($handler, $options);

self::$cache[$hash] = $cache;

return self::$cache[$hash];
	}

/**
	 * Get a database object.
	 *
	 * Returns the global {@link DatabaseDriver} object, only creating it if it doesn't already exist.
	 *
	 * @return  DatabaseDriver
	 *
	 * @see         DatabaseDriver
	 * @since       1.7.0
	 * @deprecated  5.0  Load the database service from the dependency injection container
	 */
	public static function getDbo()
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated. Load the database from the dependency injection container.',
				__METHOD__
			),
			E_USER_DEPRECATED
		);

if (!self::$database)
		{
			if (self::getContainer()->has('DatabaseDriver'))
			{
				self::$database = self::getContainer()->get('DatabaseDriver');
			}
			else
			{
				self::$database = self::createDbo();
			}
		}

return self::$database;
	}

/**
	 * Get a mailer object.
	 *
	 * Returns the global {@link Mail} object, only creating it if it doesn't already exist.
	 *
	 * @return  Mail object
	 *
	 * @see     Mail
	 * @since   1.7.0
	 */
	public static function getMailer()
	{
		if (!self::$mailer)
		{
			self::$mailer = self::createMailer();
		}

$copy = clone self::$mailer;

return $copy;
	}

/**
	 * Return the {@link Date} object
	 *
	 * @param   mixed  $time      The initial time for the Date object
	 * @param   mixed  $tzOffset  The timezone offset.
	 *
	 * @return  Date object
	 *
	 * @see     Date
	 * @since   1.7.0
	 */
	public static function getDate($time = 'now', $tzOffset = null)
	{
		static $classname;
		static $mainLocale;

$language = self::getLanguage();
		$locale = $language->getTag();

if (!isset($classname) || $locale != $mainLocale)
		{
			// Store the locale for future reference
			$mainLocale = $locale;

if ($mainLocale !== false)
			{
				$classname = str_replace('-', '_', $mainLocale) . 'Date';

if (!class_exists($classname))
				{
					// The class does not exist, default to Date
					$classname = 'Joomla\\CMS\\Date\\Date';
				}
			}
			else
			{
				// No tag, so default to Date
				$classname = 'Joomla\\CMS\\Date\\Date';
			}
		}

$key = $time . '-' . ($tzOffset instanceof \DateTimeZone ? $tzOffset->getName() : (string) $tzOffset);

if (!isset(self::$dates[$classname][$key]))
		{
			self::$dates[$classname][$key] = new $classname($time, $tzOffset);
		}

$date = clone self::$dates[$classname][$key];

return $date;
	}

/**
	 * Create a configuration object
	 *
	 * @param   string  $file       The path to the configuration file.
	 * @param   string  $type       The type of the configuration file.
	 * @param   string  $namespace  The namespace of the configuration file.
	 *
	 * @return  Registry
	 *
	 * @see         Registry
	 * @since       1.7.0
	 * @deprecated  5.0  Use the configuration object within the application.
	 */
	protected static function createConfig($file, $type = 'PHP', $namespace = '')
	{
		@trigger_error(
			sprintf(
				'%s() is deprecated. The configuration object should be read from the application.',
				__METHOD__
			),
			E_USER_DEPRECATED
		);

if (is_file($file))
		{
			include_once $file;
		}

// Create the registry with a default namespace of config
		$registry = new Registry;

// Sanitize the namespace.
		$namespace = ucfirst((string) preg_replace('/[^A-Z_]/i', '', $namespace));

// Build the config name.
		$name = 'JConfig' . $namespace;

// Handle the PHP configuration type.
		if ($type === 'PHP' && class_exists($name))
		{
			// Create the JConfig object
			$config = new $name;

// Load the configuration values into the registry
			$registry->loadObject($config);
		}

return $registry;
	}

/**
	 * Create a container object
	 *
	 * @return  Container
	 *
	 * @since   4.0.0
	 */
	protected static function createContainer(): Container
	{
		$container = (new Container)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Application)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Authentication)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\CacheController)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Config)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Console)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Database)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Dispatcher)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Document)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Form)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Logger)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Language)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Menu)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Pathway)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\HTMLRegistry)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Session)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\Toolbar)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\WebAssetRegistry)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\ApiRouter)
			->registerServiceProvider(new \Joomla\CMS\Service\Provider\User);

return $container;
	}

/**
	 * Create a database object
	 *
	 * @return  DatabaseDriver
	 *
	 * @see         DatabaseDriver
	 * @since       1.7.0
	 * @deprecated  5.0  Use the database service in the DI container
	 */
	protected static function createDbo()
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated, register a service provider to create a %2$s instance instead.',
				__METHOD__,
				DatabaseInterface::class
			),
			E_USER_DEPRECATED
		);

$conf = self::getConfig();

$host = $conf->get('host');
		$user = $conf->get('user');
		$password = $conf->get('password');
		$database = $conf->get('db');
		$prefix = $conf->get('dbprefix');
		$driver = $conf->get('dbtype');

$options = array('driver' => $driver, 'host' => $host, 'user' => $user, 'password' => $password, 'database' => $database, 'prefix' => $prefix);

if ((int) $conf->get('dbencryption') !== 0)
		{
			$options['ssl'] = [
				'enable'             => true,
				'verify_server_cert' => (bool) $conf->get('dbsslverifyservercert'),
			];

foreach (['cipher', 'ca', 'key', 'cert'] as $value)
			{
				$confVal = trim($conf->get('dbssl' . $value, ''));

if ($confVal !== '')
				{
					$options['ssl'][$value] = $confVal;
				}
			}
		}

try
		{
			$db = DatabaseDriver::getInstance($options);
		}
		catch (\RuntimeException $e)
		{
			if (!headers_sent())
			{
				header('HTTP/1.1 500 Internal Server Error');
			}

jexit('Database Error: ' . $e->getMessage());
		}

return $db;
	}

/**
	 * Create a mailer object
	 *
	 * @return  Mail object
	 *
	 * @see     Mail
	 * @since   1.7.0
	 */
	protected static function createMailer()
	{
		$conf = self::getConfig();

$smtpauth = ($conf->get('smtpauth') == 0) ? null : 1;
		$smtpuser = $conf->get('smtpuser');
		$smtppass = $conf->get('smtppass');
		$smtphost = $conf->get('smtphost');
		$smtpsecure = $conf->get('smtpsecure');
		$smtpport = $conf->get('smtpport');
		$mailfrom = $conf->get('mailfrom');
		$fromname = $conf->get('fromname');
		$mailer = $conf->get('mailer');

// Create a Mail object
		$mail = Mail::getInstance();

// Clean the email address
		$mailfrom = MailHelper::cleanLine($mailfrom);

// Set default sender without Reply-to if the mailfrom is a valid address
		if (MailHelper::isEmailAddress($mailfrom))
		{
			// Wrap in try/catch to catch phpmailerExceptions if it is throwing them
			try
			{
				// Check for a false return value if exception throwing is disabled
				if ($mail->setFrom($mailfrom, MailHelper::cleanLine($fromname), false) === false)
				{
					Log::add(__METHOD__ . '() could not set the sender data.', Log::WARNING, 'mail');
				}
			}
			catch (phpmailerException $e)
			{
				Log::add(__METHOD__ . '() could not set the sender data.', Log::WARNING, 'mail');
			}
		}

// Default mailer is to use PHP's mail function
		switch ($mailer)
		{
			case 'smtp':
				$mail->useSmtp($smtpauth, $smtphost, $smtpuser, $smtppass, $smtpsecure, $smtpport);
				break;

case 'sendmail':
				$mail->isSendmail();
				break;

default:
				$mail->isMail();
				break;
		}

return $mail;
	}

/**
	 * Create a language object
	 *
	 * @return  Language object
	 *
	 * @see         Language
	 * @since       1.7.0
	 * @deprecated  5.0  Load the language service from the dependency injection container or via $app->getLanguage()
	 */
	protected static function createLanguage()
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated. Load the language from the dependency injection container or via %2$s::getApplication()->getLanguage().',
				__METHOD__,
				__CLASS__
			),
			E_USER_DEPRECATED
		);

$conf = self::getConfig();
		$locale = $conf->get('language');
		$debug = $conf->get('debug_lang');
		$lang = self::getContainer()->get(LanguageFactoryInterface::class)->createLanguage($locale, $debug);

return $lang;
	}

/**
	 * Create a document object
	 *
	 * @return  Document object
	 *
	 * @see         Document
	 * @since       1.7.0
	 * @deprecated  5.0  Load the document service from the dependency injection container or via $app->getDocument()
	 */
	protected static function createDocument()
	{
		@trigger_error(
			sprintf(
				'%1$s() is deprecated. Load the document from the dependency injection container or via %2$s::getApplication()->getDocument().',
				__METHOD__,
				__CLASS__
			),
			E_USER_DEPRECATED
		);

$lang = self::getLanguage();

$input = self::getApplication()->input;
		$type = $input->get('format', 'html', 'cmd');

$version = new Version;

$attributes = array(
			'charset'      => 'utf-8',
			'lineend'      => 'unix',
			'tab'          => "\t",
			'language'     => $lang->getTag(),
			'direction'    => $lang->isRtl() ? 'rtl' : 'ltr',
			'mediaversion' => $version->getMediaVersion(),
		);

return self::getContainer()->get(FactoryInterface::class)->createDocument($type, $attributes);
	}

/**
	 * Creates a new stream object with appropriate prefix
	 *
	 * @param   boolean  $usePrefix        Prefix the connections for writing
	 * @param   boolean  $useNetwork       Use network if available for writing; use false to disable (e.g. FTP, SCP)
	 * @param   string   $userAgentSuffix  String to append to user agent
	 * @param   boolean  $maskUserAgent    User agent masking (prefix Mozilla)
	 *
	 * @return  Stream
	 *
	 * @see     Stream
	 * @since   1.7.0
	 */
	public static function getStream($usePrefix = true, $useNetwork = true, $userAgentSuffix = 'Joomla', $maskUserAgent = false)
	{
		// Setup the context; Joomla! UA and overwrite
		$context = array();
		$version = new Version;

// Set the UA for HTTP and overwrite for FTP
		$context['http']['user_agent'] = $version->getUserAgent($userAgentSuffix, $maskUserAgent);
		$context['ftp']['overwrite'] = true;

if ($usePrefix)
		{
			$FTPOptions = ClientHelper::getCredentials('ftp');
			$SCPOptions = ClientHelper::getCredentials('scp');

if ($FTPOptions['enabled'] == 1 && $useNetwork)
			{
				$prefix = 'ftp://' . $FTPOptions['user'] . ':' . $FTPOptions['pass'] . '@' . $FTPOptions['host'];
				$prefix .= $FTPOptions['port'] ? ':' . $FTPOptions['port'] : '';
				$prefix .= $FTPOptions['root'];
			}
			elseif ($SCPOptions['enabled'] == 1 && $useNetwork)
			{
				$prefix = 'ssh2.sftp://' . $SCPOptions['user'] . ':' . $SCPOptions['pass'] . '@' . $SCPOptions['host'];
				$prefix .= $SCPOptions['port'] ? ':' . $SCPOptions['port'] : '';
				$prefix .= $SCPOptions['root'];
			}
			else
			{
				$prefix = JPATH_ROOT . '/';
			}

$retval = new Stream($prefix, JPATH_ROOT, $context);
		}
		else
		{
			$retval = new Stream('', '', $context);
		}

return $retval;
	}
}