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Filename : Help.php
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<?php

/**
 * This file is part of CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace CodeIgniter\Commands;

use CodeIgniter\CLI\BaseCommand;

/**
 * CI Help command for the spark script.
 *
 * Lists the basic usage information for the spark script,
 * and provides a way to list help for other commands.
 */
class Help extends BaseCommand
{
    /**
     * The group the command is lumped under
     * when listing commands.
     *
     * @var string
     */
    protected $group = 'CodeIgniter';

    /**
     * The Command's name
     *
     * @var string
     */
    protected $name = 'help';

    /**
     * the Command's short description
     *
     * @var string
     */
    protected $description = 'Displays basic usage information.';

    /**
     * the Command's usage
     *
     * @var string
     */
    protected $usage = 'help [<command_name>]';

    /**
     * the Command's Arguments
     *
     * @var array
     */
    protected $arguments = [
        'command_name' => 'The command name [default: "help"]',
    ];

    /**
     * the Command's Options
     *
     * @var array
     */
    protected $options = [];

    /**
     * Displays the help for spark commands.
     */
    public function run(array $params)
    {
        $command = array_shift($params);
        $command ??= 'help';
        $commands = $this->commands->getCommands();

        if (! $this->commands->verifyCommand($command, $commands)) {
            return;
        }

        $class = new $commands[$command]['class']($this->logger, $this->commands);
        $class->showHelp();
    }
}