Command.php

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<?php

namespace Elgg\Cli;

use RuntimeException;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

abstract class Command extends BaseCommand {

    final public function execute(InputInterface $input, OutputInterface $output) {

        $this->input = $input;
        $this->output = $output;

        $transport = new ResponseTransport($this);
        _elgg_services()->responseFactory->setTransport($transport);

        $this->login();

        try {
            $result = $this->command();

            if (is_callable($result)) {
                $result = call_user_func($result, $this);
            }
        } catch (\Exception $ex) {
            $this->error($ex);

            $result = $ex->getCode() ? : 1;
        }

        $this->dumpRegisters();

        $this->logout();

        return (int) $result;
    }

    abstract protected function command();

    final protected function login() {
        if (!$this->getDefinition()->hasOption('as')) {
            return;
        }
        $username = $this->option('as');
        if (!$username) {
            return;
        }
        $user = get_user_by_username($username);
        if (!$user) {
            throw new RuntimeException("User with username $username not found");
        }
        if (!login($user)) {
            throw new RuntimeException("Unable to login as $username");
        }
        elgg_log("Logged in as $username [guid: $user->guid]");
    }

    final protected function logout() {
        if (elgg_is_logged_in()) {
            logout();
        }
    }
}