Interactive shell for kirby cli

i.php

<?php

namespace rasteiner\kirby\cli\interactive;

class Shell {
	public function __autocomplete(string $str): array {
		$info = readline_info();
		$line = $info['line_buffer'];
		$pos = $info['end'];
		$line = substr($line, 0, $pos);
		
		$commands = $this->cli->commands();
		$commands = ['exit', ... $commands['core'], ... $commands['global'], ... $commands['custom']];

		return array_filter($commands, function($command) use ($line) {
			return strpos($command, $line) === 0;
		});
	}

	public function __construct(public $cli) {
		$cli->info('Welcome to the Kirby Shell');
		$cli->br();
		$cli->info('Type "exit" to quit');

		readline_completion_function([$this, '__autocomplete']);

		while (true) {
			$line = trim(readline('kirby> '));

			if ($line === 'exit') {
				break;
			}

			if ($line === 'i') {
				$cli->info('You are already running the interactive shell');
				continue;
			}

			// split line into command and arguments
			$parts = explode(' ', $line);
			$cli->command(... $parts);
		}
	}
}

return [
	'description' => 'Interactive Kirby Shell',
	'args' => [],
	'command' => static function ($cli): void {
		if(!function_exists('readline')) {
			$cli->error('Readline is not available');
			return;
		}

		new Shell($cli);
	}
];