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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2020 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Console;

\defined('JPATH_PLATFORM') or die;

use Joomla\Console\Command\AbstractCommand;
use Symfony\Component\Console\Input\Input;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

/**
 * Console command for displaying configuration options
 *
 * @since  4.0.0
 */
class GetConfigurationCommand extends AbstractCommand
{
	/**
	 * The default command name
	 *
	 * @var    string
	 * @since  4.0.0
	 */
	protected static $defaultName = 'config:get';

/**
	 * Stores the Input Object
	 * @var Input
	 * @since 4.0.0
	 */
	private $cliInput;

/**
	 * SymfonyStyle Object
	 * @var SymfonyStyle
	 * @since 4.0.0
	 */
	private $ioStyle;

/**
	 * Constant defining the Database option group
	 * @var array
	 * @since 4.0.0
	 */
	public const DB_GROUP = [
		'name' => 'db',
		'options' => [
			'dbtype',
			'host',
			'user',
			'password',
			'dbprefix',
			'db',
			'dbencryption',
			'dbsslverifyservercert',
			'dbsslkey',
			'dbsslcert',
			'dbsslca',
			'dbsslcipher'
		]
	];

/**
	 * Constant defining the Session option group
	 * @var array
	 * @since 4.0.0
	 */
	public const SESSION_GROUP = [
		'name' => 'session',
		'options' => [
			'session_handler',
			'shared_session',
			'session_metadata'
		]
	];

/**
	 * Constant defining the Mail option group
	 * @var array
	 * @since 4.0.0
	 */
	public const MAIL_GROUP = [
		'name' => 'mail',
		'options' => [
			'mailonline',
			'mailer',
			'mailfrom',
			'fromname',
			'sendmail',
			'smtpauth',
			'smtpuser',
			'smtppass',
			'smtphost',
			'smtpsecure',
			'smtpport'
		]
	];

/**
	 * Return code if configuration is get successfully
	 * @since 4.0.0
	 */
	public const CONFIG_GET_SUCCESSFUL = 0;

/**
	 * Return code if configuration group option is not found
	 * @since 4.0.0
	 */
	public const CONFIG_GET_GROUP_NOT_FOUND = 1;

/**
	 * Return code if configuration option is not found
	 * @since 4.0.0
	 */
	public const CONFIG_GET_OPTION_NOT_FOUND = 2;

/**
	 * Return code if the command has been invoked with wrong options
	 * @since 4.0.0
	 */
	public const CONFIG_GET_OPTION_FAILED = 3;

/**
	 * Configures the IO
	 *
	 * @param   InputInterface   $input   Console Input
	 * @param   OutputInterface  $output  Console Output
	 *
	 * @return void
	 *
	 * @since 4.0.0
	 *
	 */
	private function configureIO(InputInterface $input, OutputInterface $output)
	{
		$this->cliInput = $input;
		$this->ioStyle = new SymfonyStyle($input, $output);
	}

/**
	 * Displays logically grouped options
	 *
	 * @param   string  $group  The group to be processed
	 *
	 * @return integer
	 *
	 * @since 4.0.0
	 */
	public function processGroupOptions($group): int
	{
		$configs = $this->getApplication()->getConfig()->toArray();
		$configs = $this->formatConfig($configs);

$groups = $this->getGroups();

$foundGroup = false;

foreach ($groups as $key => $value)
		{
			if ($value['name'] === $group)
			{
				$foundGroup = true;
				$options = [];

foreach ($value['options'] as $option)
				{
					$options[] = [$option, $configs[$option]];
				}

$this->ioStyle->table(['Option', 'Value'], $options);
			}
		}

if (!$foundGroup)
		{
			$this->ioStyle->error("Group *$group* not found");

return self::CONFIG_GET_GROUP_NOT_FOUND;
		}

return self::CONFIG_GET_SUCCESSFUL;
	}

/**
	 * Gets the defined option groups
	 *
	 * @return array
	 *
	 * @since 4.0.0
	 */
	public function getGroups()
	{
		return [
			self::DB_GROUP,
			self::MAIL_GROUP,
			self::SESSION_GROUP
		];
	}

/**
	 * Formats the configuration array into desired format
	 *
	 * @param   array  $configs  Array of the configurations
	 *
	 * @return array
	 *
	 * @since 4.0.0
	 */
	public function formatConfig(Array $configs): array
	{
		$newConfig = [];

foreach ($configs as $key => $config)
		{
			$config = $config === false ? "false" : $config;
			$config = $config === true ? "true" : $config;

if (!in_array($key, ['cwd', 'execution']))
			{
				$newConfig[$key] = $config;
			}
		}

return $newConfig;
	}

/**
	 * Handles the command when a single option is requested
	 *
	 * @param   string  $option  The option we want to get its value
	 *
	 * @return integer
	 *
	 * @since 4.0.0
	 */
	public function processSingleOption($option): int
	{
		$configs = $this->getApplication()->getConfig()->toArray();

if (!array_key_exists($option, $configs))
		{
			$this->ioStyle->error("Can't find option *$option* in configuration list");

return self::CONFIG_GET_OPTION_NOT_FOUND;
		}

$value = $this->formatConfigValue($this->getApplication()->get($option));

$this->ioStyle->table(['Option', 'Value'], [[$option, $value]]);

return self::CONFIG_GET_SUCCESSFUL;
	}

/**
	 * Formats the Configuration value
	 *
	 * @param   mixed  $value  Value to be formatted
	 *
	 * @return string
	 *
	 * @since version
	 */
	protected function formatConfigValue($value): string
	{
		if ($value === false)
		{
			return 'false';
		}
		elseif ($value === true)
		{
			return 'true';
		}
		elseif ($value === null)
		{
			return 'Not Set';
		}
		elseif (\is_array($value))
		{
			return \json_encode($value);
		}
		elseif (\is_object($value))
		{
			return \json_encode(\get_object_vars($value));
		}
		else
		{
			return $value;
		}
	}

/**
	 * Initialise the command.
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	protected function configure(): void
	{
		$groups = $this->getGroups();

foreach ($groups as $key => $group)
		{
			$groupNames[] = $group['name'];
		}

$groupNames = implode(', ', $groupNames);

$this->addArgument('option', null, 'Name of the option');
		$this->addOption('group', 'g', InputOption::VALUE_REQUIRED, 'Name of the option');

$help = "<info>%command.name%</info> displays the current value of a configuration option
				\nUsage: <info>php %command.full_name%</info> <option>
				\nGroup usage: <info>php %command.full_name%</info> --group <groupname>
				\nAvailable group names: $groupNames";

$this->setDescription('Display the current value of a configuration option');
		$this->setHelp($help);
	}

/**
	 * Internal function to execute the command.
	 *
	 * @param   InputInterface   $input   The input to inject into the command.
	 * @param   OutputInterface  $output  The output to inject into the command.
	 *
	 * @return  integer  The command exit code
	 *
	 * @since   4.0.0
	 */
	protected function doExecute(InputInterface $input, OutputInterface $output): int
	{
		$this->configureIO($input, $output);

$configs = $this->formatConfig($this->getApplication()->getConfig()->toArray());

$option = $this->cliInput->getArgument('option');
		$group  = $this->cliInput->getOption('group');

if ($group)
		{
			return $this->processGroupOptions($group);
		}

if ($option)
		{
			return $this->processSingleOption($option);
		}

if (!$option && !$group)
		{
			$options = [];

array_walk(
				$configs,
				function ($value, $key) use (&$options) {
					$options[] = [$key, $this->formatConfigValue($value)];
				}
			);

$this->ioStyle->title("Current options in Configuration");
			$this->ioStyle->table(['Option', 'Value'], $options);

return self::CONFIG_GET_SUCCESSFUL;
		}

return self::CONFIG_GET_OPTION_NOT_FOUND;
	}
}