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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Application;

\defined('JPATH_PLATFORM') or die;

use Joomla\Application\AbstractApplication;
use Joomla\CMS\Application\CLI\CliInput;
use Joomla\CMS\Application\CLI\CliOutput;
use Joomla\CMS\Application\CLI\Output\Stdout;
use Joomla\CMS\Extension\ExtensionManagerTrait;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Language;
use Joomla\DI\Container;
use Joomla\DI\ContainerAwareTrait;
use Joomla\Event\DispatcherAwareInterface;
use Joomla\Event\DispatcherAwareTrait;
use Joomla\Event\DispatcherInterface;
use Joomla\Input\Input;
use Joomla\Registry\Registry;
use Joomla\Session\SessionInterface;

/**
 * Base class for a Joomla! command line application.
 *
 * @since       2.5.0
 * @deprecated  5.0  Use the ConsoleApplication instead
 */
abstract class CliApplication extends AbstractApplication implements DispatcherAwareInterface, CMSApplicationInterface
{
	use DispatcherAwareTrait, EventAware, IdentityAware, ContainerAwareTrait, ExtensionManagerTrait, ExtensionNamespaceMapper;

/**
	 * Output object
	 *
	 * @var    CliOutput
	 * @since  4.0.0
	 */
	protected $output;

/**
	 * The input.
	 *
	 * @var    \Joomla\Input\Input
	 * @since  4.0.0
	 */
	protected $input = null;

/**
	 * CLI Input object
	 *
	 * @var    CliInput
	 * @since  4.0.0
	 */
	protected $cliInput;

/**
	 * The application language object.
	 *
	 * @var    Language
	 * @since  4.0.0
	 */
	protected $language;

/**
	 * The application message queue.
	 *
	 * @var    array
	 * @since  4.0.0
	 */
	protected $messages = [];

/**
	 * The application instance.
	 *
	 * @var    CliApplication
	 * @since  1.7.0
	 */
	protected static $instance;

/**
	 * Class constructor.
	 *
	 * @param   Input                $input       An optional argument to provide dependency injection for the application's
	 *                                            input object.  If the argument is a JInputCli object that object will become
	 *                                            the application's input object, otherwise a default input object is created.
	 * @param   Registry             $config      An optional argument to provide dependency injection for the application's
	 *                                            config object.  If the argument is a Registry object that object will become
	 *                                            the application's config object, otherwise a default config object is created.
	 * @param   CliOutput            $output      The output handler.
	 * @param   CliInput             $cliInput    The CLI input handler.
	 * @param   DispatcherInterface  $dispatcher  An optional argument to provide dependency injection for the application's
	 *                                            event dispatcher.  If the argument is a DispatcherInterface object that object will become
	 *                                            the application's event dispatcher, if it is null then the default event dispatcher
	 *                                            will be created based on the application's loadDispatcher() method.
	 * @param   Container            $container   Dependency injection container.
	 *
	 * @since   1.7.0
	 */
	public function __construct(Input $input = null, Registry $config = null, CliOutput $output = null, CliInput $cliInput = null,
		DispatcherInterface $dispatcher = null, Container $container = null
	)
	{
		// Close the application if we are not executed from the command line.
		if (!\defined('STDOUT') || !\defined('STDIN') || !isset($_SERVER['argv']))
		{
			$this->close();
		}

$container = $container ?: Factory::getContainer();
		$this->setContainer($container);
		$this->setDispatcher($dispatcher ?: $container->get(\Joomla\Event\DispatcherInterface::class));

if (!$container->has('session'))
		{
			$container->alias('session', 'session.cli')
				->alias('JSession', 'session.cli')
				->alias(\Joomla\CMS\Session\Session::class, 'session.cli')
				->alias(\Joomla\Session\Session::class, 'session.cli')
				->alias(\Joomla\Session\SessionInterface::class, 'session.cli');
		}

$this->input    = new \Joomla\CMS\Input\Cli;
		$this->language = Factory::getLanguage();
		$this->output   = $output ?: new Stdout;
		$this->cliInput = $cliInput ?: new CliInput;

parent::__construct($config);

// Set the current directory.
		$this->set('cwd', getcwd());

// Set up the environment
		$this->input->set('format', 'cli');
	}

/**
	 * Magic method to access properties of the application.
	 *
	 * @param   string  $name  The name of the property.
	 *
	 * @return  mixed   A value if the property name is valid, null otherwise.
	 *
	 * @since       4.0.0
	 * @deprecated  5.0  This is a B/C proxy for deprecated read accesses
	 */
	public function __get($name)
	{
		switch ($name)
		{
			case 'input':
				@trigger_error(
					'Accessing the input property of the application is deprecated, use the getInput() method instead.',
					E_USER_DEPRECATED
				);

return $this->getInput();

default:
				$trace = debug_backtrace();
				trigger_error(
					sprintf(
						'Undefined property via __get(): %1$s in %2$s on line %3$s',
						$name,
						$trace[0]['file'],
						$trace[0]['line']
					),
					E_USER_NOTICE
				);
		}
	}

/**
	 * Method to get the application input object.
	 *
	 * @return  Input
	 *
	 * @since   4.0.0
	 */
	public function getInput(): Input
	{
		return $this->input;
	}

/**
	 * Method to get the application language object.
	 *
	 * @return  Language  The language object
	 *
	 * @since   4.0.0
	 */
	public function getLanguage()
	{
		return $this->language;
	}

/**
	 * Returns a reference to the global CliApplication object, only creating it if it doesn't already exist.
	 *
	 * This method must be invoked as: $cli = CliApplication::getInstance();
	 *
	 * @param   string  $name  The name (optional) of the JApplicationCli class to instantiate.
	 *
	 * @return  CliApplication
	 *
	 * @since       1.7.0
	 * @deprecated  5.0 Load the app through the container
	 * @throws  \RuntimeException
	 */
	public static function getInstance($name = null)
	{
		// Only create the object if it doesn't exist.
		if (empty(static::$instance))
		{
			if (!class_exists($name))
			{
				throw new \RuntimeException(sprintf('Unable to load application: %s', $name), 500);
			}

static::$instance = new $name;
		}

return static::$instance;
	}

/**
	 * Execute the application.
	 *
	 * @return  void
	 *
	 * @since   1.7.0
	 */
	public function execute()
	{
		$this->createExtensionNamespaceMap();

// Trigger the onBeforeExecute event
		$this->triggerEvent('onBeforeExecute');

// Perform application routines.
		$this->doExecute();

// Trigger the onAfterExecute event.
		$this->triggerEvent('onAfterExecute');
	}

/**
	 * Get an output object.
	 *
	 * @return  CliOutput
	 *
	 * @since   4.0.0
	 */
	public function getOutput()
	{
		return $this->output;
	}

/**
	 * Get a CLI input object.
	 *
	 * @return  CliInput
	 *
	 * @since   4.0.0
	 */
	public function getCliInput()
	{
		return $this->cliInput;
	}

/**
	 * Write a string to standard output.
	 *
	 * @param   string   $text  The text to display.
	 * @param   boolean  $nl    True (default) to append a new line at the end of the output string.
	 *
	 * @return  $this
	 *
	 * @since   4.0.0
	 */
	public function out($text = '', $nl = true)
	{
		$this->getOutput()->out($text, $nl);

return $this;
	}

/**
	 * Get a value from standard input.
	 *
	 * @return  string  The input string from standard input.
	 *
	 * @codeCoverageIgnore
	 * @since   4.0.0
	 */
	public function in()
	{
		return $this->getCliInput()->in();
	}

/**
	 * Set an output object.
	 *
	 * @param   CliOutput  $output  CliOutput object
	 *
	 * @return  $this
	 *
	 * @since   3.3
	 */
	public function setOutput(CliOutput $output)
	{
		$this->output = $output;

return $this;
	}

/**
	 * Enqueue a system message.
	 *
	 * @param   string  $msg   The message to enqueue.
	 * @param   string  $type  The message type.
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	public function enqueueMessage($msg, $type = self::MSG_INFO)
	{
		if (!\array_key_exists($type, $this->messages))
		{
			$this->messages[$type] = [];
		}

$this->messages[$type][] = $msg;
	}

/**
	 * Get the system message queue.
	 *
	 * @return  array  The system message queue.
	 *
	 * @since   4.0.0
	 */
	public function getMessageQueue()
	{
		return $this->messages;
	}

/**
	 * Check the client interface by name.
	 *
	 * @param   string  $identifier  String identifier for the application interface
	 *
	 * @return  boolean  True if this application is of the given type client interface.
	 *
	 * @since   4.0.0
	 */
	public function isClient($identifier)
	{
		return $identifier === 'cli';
	}

/**
	 * Method to get the application session object.
	 *
	 * @return  SessionInterface  The session object
	 *
	 * @since   4.0.0
	 */
	public function getSession()
	{
		return $this->container->get(SessionInterface::class);
	}

/**
	 * Retrieve the application configuration object.
	 *
	 * @return  Registry
	 *
	 * @since   4.0.0
	 */
	public function getConfig()
	{
		return $this->config;
	}

/**
	 * Flag if the application instance is a CLI or web based application.
	 *
	 * Helper function, you should use the native PHP functions to detect if it is a CLI application.
	 *
	 * @return  boolean
	 *
	 * @since       4.0.0
	 * @deprecated  5.0  Will be removed without replacements
	 */
	public function isCli()
	{
		return true;
	}
}