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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2019 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\CMS\Factory;
use Joomla\CMS\User\User;
use Joomla\Console\Command\AbstractCommand;
use Joomla\Filter\InputFilter;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Exception\InvalidOptionException;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Question\ChoiceQuestion;
use Symfony\Component\Console\Style\SymfonyStyle;

/**
 * Console command for adding a user
 *
 * @since  4.0.0
 */
class AddUserCommand extends AbstractCommand
{
	/**
	 * The default command name
	 *
	 * @var    string
	 * @since  4.0.0
	 */
	protected static $defaultName = 'user:add';

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

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

	/**
	 * The username
	 *
	 * @var    string
	 *
	 * @since  4.0.0
	 */
	private $user;

	/**
	 * The password
	 *
	 * @var    string
	 *
	 * @since  4.0.0
	 */
	private $password;

	/**
	 *  The name
	 *
	 * @var    string
	 *
	 * @since  4.0.0
	 */
	private $name;

	/**
	 * The email address
	 *
	 * @var    string
	 *
	 * @since  4.0.0
	 */
	private $email;

	/**
	 * The usergroups
	 *
	 * @var    array
	 *
	 * @since  4.0.0
	 */
	private $userGroups = [];

	/**
	 * 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);
		$this->ioStyle->title('Add user');
		$this->user = $this->getStringFromOption('username', 'Please enter a username');
		$this->name = $this->getStringFromOption('name', 'Please enter a name (full name of user)');
		$this->email = $this->getStringFromOption('email', 'Please enter an email address');
		$this->password = $this->getStringFromOption('password', 'Please enter a password');
		$this->userGroups = $this->getUserGroups();

		if (\in_array("error", $this->userGroups))
		{
			$this->ioStyle->error("'" . $this->userGroups[1] . "' user group doesn't exist!");

			return Command::FAILURE;
		}

		// Get filter to remove invalid characters
		$filter = new InputFilter;

		$user['username'] = $filter->clean($this->user, 'USERNAME');
		$user['password'] = $this->password;
		$user['name'] = $filter->clean($this->name, 'STRING');
		$user['email'] = $this->email;
		$user['groups'] = $this->userGroups;

		$userObj = User::getInstance();
		$userObj->bind($user);

		if (!$userObj->save())
		{
			switch ($userObj->getError())
			{
				case "JLIB_DATABASE_ERROR_USERNAME_INUSE":
					$this->ioStyle->error("The username already exists!");
					break;
				case "JLIB_DATABASE_ERROR_EMAIL_INUSE":
					$this->ioStyle->error("The email address already exists!");
					break;
				case "JLIB_DATABASE_ERROR_VALID_MAIL":
					$this->ioStyle->error("The email address is invalid!");
					break;
			}

			return 1;
		}

		$this->ioStyle->success("User created!");

		return Command::SUCCESS;
	}

	/**
	 * Method to get groupId by groupName
	 *
	 * @param   string  $groupName  name of group
	 *
	 * @return  integer
	 *
	 * @since   4.0.0
	 */
	protected function getGroupId($groupName)
	{
		$db = Factory::getDbo();
		$query = $db->getQuery(true)
			->select($db->quoteName('id'))
			->from($db->quoteName('#__usergroups'))
			->where($db->quoteName('title') . ' = :groupName')
			->bind(':groupName', $groupName);
		$db->setQuery($query);

		return $db->loadResult();
	}

	/**
	 * Method to get a value from option
	 *
	 * @param   string  $option    set the option name
	 * @param   string  $question  set the question if user enters no value to option
	 *
	 * @return  string
	 *
	 * @since   4.0.0
	 */
	public function getStringFromOption($option, $question): string
	{
		$answer = (string) $this->cliInput->getOption($option);

		while (!$answer)
		{
			if ($option === 'password')
			{
				$answer = (string) $this->ioStyle->askHidden($question);
			}
			else
			{
				$answer = (string) $this->ioStyle->ask($question);
			}
		}

			return $answer;
	}

	/**
	 * Method to get a value from option
	 *
	 * @return  array
	 *
	 * @since   4.0.0
	 */
	protected function getUserGroups(): array
	{
		$groups = $this->getApplication()->getConsoleInput()->getOption('usergroup');
		$db = Factory::getDbo();

		$groupList = [];

		// Group names have been supplied as input arguments
		if (!\is_null($groups) && $groups[0])
		{
			$groups = explode(',', $groups);

			foreach ($groups as $group)
			{
				$groupId = $this->getGroupId($group);

				if (empty($groupId))
				{
					$this->ioStyle->error("Invalid group name '" . $group . "'");
					throw new InvalidOptionException("Invalid group name " . $group);
				}

				$groupList[] = $this->getGroupId($group);
			}

			return $groupList;
		}

		// Generate select list for user
		$query = $db->getQuery(true)
			->select($db->quoteName('title'))
			->from($db->quoteName('#__usergroups'))
			->order($db->quoteName('id') . 'ASC');
		$db->setQuery($query);

		$list = $db->loadColumn();

		$choice = new ChoiceQuestion(
			'Please select a usergroup (separate multiple groups with a comma)',
			$list
		);
		$choice->setMultiselect(true);

		$answer = (array) $this->ioStyle->askQuestion($choice);

		foreach ($answer as $group)
		{
			$groupList[] = $this->getGroupId($group);
		}

		return $groupList;
	}

	/**
	 * Configure the IO.
	 *
	 * @param   InputInterface   $input   The input to inject into the command.
	 * @param   OutputInterface  $output  The output to inject into the command.
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	private function configureIO(InputInterface $input, OutputInterface $output)
	{
		$this->cliInput = $input;
		$this->ioStyle = new SymfonyStyle($input, $output);
	}

	/**
	 * Configure the command.
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	protected function configure(): void
	{
		$help = "<info>%command.name%</info> will add a user
		\nUsage: <info>php %command.full_name%</info>";

		$this->addOption('username', null, InputOption::VALUE_OPTIONAL, 'username');
		$this->addOption('name', null, InputOption::VALUE_OPTIONAL, 'full name of user');
		$this->addOption('password', null, InputOption::VALUE_OPTIONAL, 'password');
		$this->addOption('email', null, InputOption::VALUE_OPTIONAL, 'email address');
		$this->addOption('usergroup', null, InputOption::VALUE_OPTIONAL, 'usergroup (separate multiple groups with comma ",")');
		$this->setDescription('Add a user');
		$this->setHelp($help);
	}
}