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✏️ Editing: Commands.php

<?php

/**
 * This file is part of the 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\CLI;

use CodeIgniter\Autoloader\FileLocator;
use CodeIgniter\Log\Logger;
use ReflectionClass;
use ReflectionException;

/**
 * Core functionality for running, listing, etc commands.
 */
class Commands
{
	/**
	 * The found commands.
	 *
	 * @var array
	 */
	protected $commands = [];

/**
	 * Logger instance.
	 *
	 * @var Logger
	 */
	protected $logger;

/**
	 * Constructor
	 *
	 * @param Logger|null $logger
	 */
	public function __construct($logger = null)
	{
		$this->logger = $logger ?? service('logger');
		$this->discoverCommands();
	}

/**
	 * Runs a command given
	 *
	 * @param string $command
	 * @param array  $params
	 */
	public function run(string $command, array $params)
	{
		if (! $this->verifyCommand($command, $this->commands))
		{
			return;
		}

// The file would have already been loaded during the
		// createCommandList function...
		$className = $this->commands[$command]['class'];
		$class     = new $className($this->logger, $this);

return $class->run($params);
	}

/**
	 * Provide access to the list of commands.
	 *
	 * @return array
	 */
	public function getCommands()
	{
		return $this->commands;
	}

/**
	 * Discovers all commands in the framework and within user code,
	 * and collects instances of them to work with.
	 *
	 * @return void
	 */
	public function discoverCommands()
	{
		if ($this->commands !== [])
		{
			return;
		}

/** @var FileLocator $locator */
		$locator = service('locator');
		$files   = $locator->listFiles('Commands/');

// If no matching command files were found, bail
		// This should never happen in unit testing.
		if ($files === [])
		{
			return; // @codeCoverageIgnore
		}

// Loop over each file checking to see if a command with that
		// alias exists in the class.
		foreach ($files as $file)
		{
			$className = $locator->findQualifiedNameFromPath($file);

if (empty($className) || ! class_exists($className))
			{
				continue;
			}

try
			{
				$class = new ReflectionClass($className);

if (! $class->isInstantiable() || ! $class->isSubclassOf(BaseCommand::class))
				{
					continue;
				}

/** @var BaseCommand $class */
				$class = new $className($this->logger, $this);

if (isset($class->group))
				{
					$this->commands[$class->name] = [
						'class'       => $className,
						'file'        => $file,
						'group'       => $class->group,
						'description' => $class->description,
					];
				}

unset($class);
			}
			catch (ReflectionException $e)
			{
				$this->logger->error($e->getMessage());
			}
		}

asort($this->commands);
	}

/**
	 * Verifies if the command being sought is found
	 * in the commands list.
	 *
	 * @param string $command
	 * @param array  $commands
	 *
	 * @return boolean
	 */
	public function verifyCommand(string $command, array $commands): bool
	{
		if (isset($commands[$command]))
		{
			return true;
		}

$message = lang('CLI.commandNotFound', [$command]);

if ($alternatives = $this->getCommandAlternatives($command, $commands))
		{
			if (count($alternatives) === 1)
			{
				$message .= "\n\n" . lang('CLI.altCommandSingular') . "\n    ";
			}
			else
			{
				$message .= "\n\n" . lang('CLI.altCommandPlural') . "\n    ";
			}

$message .= implode("\n    ", $alternatives);
		}

CLI::error($message);
		CLI::newLine();

return false;
	}

/**
	 * Finds alternative of `$name` among collection
	 * of commands.
	 *
	 * @param string $name
	 * @param array  $collection
	 *
	 * @return array
	 */
	protected function getCommandAlternatives(string $name, array $collection): array
	{
		$alternatives = [];

foreach (array_keys($collection) as $commandName)
		{
			$lev = levenshtein($name, $commandName);

if ($lev <= strlen($commandName) / 3 || strpos($commandName, $name) !== false)
			{
				$alternatives[$commandName] = $lev;
			}
		}

ksort($alternatives, SORT_NATURAL | SORT_FLAG_CASE);

return array_keys($alternatives);
	}
}

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