class InstallCommand

class InstallCommand extends Command {
    
    /**
     * The class loader.
     *
     * @var object
     */
    protected $classLoader;
    
    /**
     * Constructs a new InstallCommand command.
     *
     * @param object $class_loader
     *   The class loader.
     */
    public function __construct($class_loader) {
        parent::__construct('install');
        $this->classLoader = $class_loader;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function configure() {
        $this->setName('install')
            ->setDescription('Installs a Drupal demo site. This is not meant for production and might be too simple for custom development. It is a quick and easy way to get Drupal running.')
            ->addArgument('install-profile', InputArgument::OPTIONAL, 'Install profile to install the site in.')
            ->addOption('langcode', NULL, InputOption::VALUE_OPTIONAL, 'The language to install the site in.', 'en')
            ->addOption('site-name', NULL, InputOption::VALUE_OPTIONAL, 'Set the site name.', 'Drupal')
            ->addUsage('demo_umami --langcode fr')
            ->addUsage('standard --site-name QuickInstall');
        parent::configure();
    }
    
    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output) {
        $io = new SymfonyStyle($input, $output);
        if (!extension_loaded('pdo_sqlite')) {
            $io->getErrorStyle()
                ->error('You must have the pdo_sqlite PHP extension installed. See core/INSTALL.sqlite.txt for instructions.');
            return 1;
        }
        // Change the directory to the Drupal root.
        chdir(dirname(__DIR__, 5));
        // Check whether there is already an installation.
        if ($this->isDrupalInstalled()) {
            // Do not fail if the site is already installed so this command can be
            // chained with ServerCommand.
            $output->writeln('<info>Drupal is already installed.</info> If you want to reinstall, remove sites/default/files and sites/default/settings.php.');
            return 0;
        }
        $install_profile = $input->getArgument('install-profile');
        if ($install_profile && !$this->validateProfile($install_profile, $io)) {
            return 1;
        }
        if (!$install_profile) {
            $install_profile = $this->selectProfile($io);
        }
        return $this->install($this->classLoader, $io, $install_profile, $input->getOption('langcode'), $this->getSitePath(), $input->getOption('site-name'));
    }
    
    /**
     * Returns whether there is already an existing Drupal installation.
     *
     * @return bool
     */
    protected function isDrupalInstalled() {
        try {
            $kernel = new DrupalKernel('prod', $this->classLoader, FALSE);
            $kernel::bootEnvironment();
            $kernel->setSitePath($this->getSitePath());
            Settings::initialize($kernel->getAppRoot(), $kernel->getSitePath(), $this->classLoader);
            $kernel->boot();
        } catch (ConnectionNotDefinedException $e) {
            return FALSE;
        }
        return !empty(Database::getConnectionInfo());
    }
    
    /**
     * Installs Drupal with specified installation profile.
     *
     * @param object $class_loader
     *   The class loader.
     * @param \Symfony\Component\Console\Style\SymfonyStyle $io
     *   The Symfony output decorator.
     * @param string $profile
     *   The installation profile to use.
     * @param string $langcode
     *   The language to install the site in.
     * @param string $site_path
     *   The path to install the site to, like 'sites/default'.
     * @param string $site_name
     *   The site name.
     *
     * @throws \Exception
     *   Thrown when failing to create the $site_path directory or settings.php.
     *
     * @return int
     *   The command exit status.
     */
    protected function install($class_loader, SymfonyStyle $io, $profile, $langcode, $site_path, $site_name) {
        $password = Crypt::randomBytesBase64(12);
        $parameters = [
            'interactive' => FALSE,
            'site_path' => $site_path,
            'parameters' => [
                'profile' => $profile,
                'langcode' => $langcode,
            ],
            'forms' => [
                'install_settings_form' => [
                    'driver' => 'sqlite',
                    'sqlite' => [
                        'database' => $site_path . '/files/.sqlite',
                    ],
                ],
                'install_configure_form' => [
                    'site_name' => $site_name,
                    'site_mail' => 'drupal@localhost',
                    'account' => [
                        'name' => 'admin',
                        'mail' => 'admin@localhost',
                        'pass' => [
                            'pass1' => $password,
                            'pass2' => $password,
                        ],
                    ],
                    'enable_update_status_module' => TRUE,
                    // \Drupal\Core\Render\Element\Checkboxes::valueCallback() requires
                    // NULL instead of FALSE values for programmatic form submissions to
                    // disable a checkbox.
'enable_update_status_emails' => NULL,
                ],
            ],
        ];
        // Create the directory and settings.php if not there so that the installer
        // works.
        if (!is_dir($site_path)) {
            if ($io->isVerbose()) {
                $io->writeln("Creating directory: {$site_path}");
            }
            if (!mkdir($site_path, 0775)) {
                throw new \RuntimeException("Failed to create directory {$site_path}");
            }
        }
        if (!file_exists("{$site_path}/settings.php")) {
            if ($io->isVerbose()) {
                $io->writeln("Creating file: {$site_path}/settings.php");
            }
            if (!copy('sites/default/default.settings.php', "{$site_path}/settings.php")) {
                throw new \RuntimeException("Copying sites/default/default.settings.php to {$site_path}/settings.php failed.");
            }
        }
        require_once 'core/includes/install.core.inc';
        $progress_bar = $io->createProgressBar();
        install_drupal($class_loader, $parameters, function ($install_state) use ($progress_bar) {
            static $started = FALSE;
            if (!$started) {
                $started = TRUE;
                // We've already done 1.
                $progress_bar->setFormat("%current%/%max% [%bar%]\n%message%\n");
                $progress_bar->setMessage(t('Installing @drupal', [
                    '@drupal' => drupal_install_profile_distribution_name(),
                ]));
                $tasks = install_tasks($install_state);
                $progress_bar->start(count($tasks) + 1);
            }
            $tasks_to_perform = install_tasks_to_perform($install_state);
            $task = current($tasks_to_perform);
            if (isset($task['display_name'])) {
                $progress_bar->setMessage($task['display_name']);
            }
            $progress_bar->advance();
        });
        $success_message = t('Congratulations, you installed @drupal!', [
            '@drupal' => drupal_install_profile_distribution_name(),
            '@name' => 'admin',
            '@pass' => $password,
        ], [
            'langcode' => $langcode,
        ]);
        $progress_bar->setMessage('<info>' . $success_message . '</info>');
        $progress_bar->display();
        $progress_bar->finish();
        $io->writeln('<info>Username:</info> admin');
        $io->writeln("<info>Password:</info> {$password}");
        return 0;
    }
    
    /**
     * Gets the site path.
     *
     * Defaults to 'sites/default'. For testing purposes this can be overridden
     * using the DRUPAL_DEV_SITE_PATH environment variable.
     *
     * @return string
     *   The site path to use.
     */
    protected function getSitePath() {
        return getenv('DRUPAL_DEV_SITE_PATH') ?: 'sites/default';
    }
    
    /**
     * Selects the install profile to use.
     *
     * @param \Symfony\Component\Console\Style\SymfonyStyle $io
     *   Symfony style output decorator.
     *
     * @return string
     *   The selected install profile.
     *
     * @see _install_select_profile()
     * @see \Drupal\Core\Installer\Form\SelectProfileForm
     */
    protected function selectProfile(SymfonyStyle $io) {
        $profiles = $this->getProfiles();
        // If there is a distribution there will be only one profile.
        if (count($profiles) == 1) {
            return key($profiles);
        }
        // Display alphabetically by human-readable name, but always put the core
        // profiles first (if they are present in the filesystem).
        natcasesort($profiles);
        if (isset($profiles['minimal'])) {
            // If the expert ("Minimal") core profile is present, put it in front of
            // any non-core profiles rather than including it with them
            // alphabetically, since the other profiles might be intended to group
            // together in a particular way.
            $profiles = [
                'minimal' => $profiles['minimal'],
            ] + $profiles;
        }
        if (isset($profiles['standard'])) {
            // If the default ("Standard") core profile is present, put it at the very
            // top of the list. This profile will have its radio button pre-selected,
            // so we want it to always appear at the top.
            $profiles = [
                'standard' => $profiles['standard'],
            ] + $profiles;
        }
        reset($profiles);
        return $io->choice('Select an installation profile', $profiles, current($profiles));
    }
    
    /**
     * Validates a user provided install profile.
     *
     * @param string $install_profile
     *   Install profile to validate.
     * @param \Symfony\Component\Console\Style\SymfonyStyle $io
     *   Symfony style output decorator.
     *
     * @return bool
     *   TRUE if the profile is valid, FALSE if not.
     */
    protected function validateProfile($install_profile, SymfonyStyle $io) {
        // Allow people to install hidden and non-distribution profiles if they
        // supply the argument.
        $profiles = $this->getProfiles(TRUE, FALSE);
        if (!isset($profiles[$install_profile])) {
            $error_msg = sprintf("'%s' is not a valid install profile.", $install_profile);
            $alternatives = [];
            foreach (array_keys($profiles) as $profile_name) {
                $lev = levenshtein($install_profile, $profile_name);
                if ($lev <= strlen($profile_name) / 4 || FALSE !== strpos($profile_name, $install_profile)) {
                    $alternatives[] = $profile_name;
                }
            }
            if (!empty($alternatives)) {
                $error_msg .= sprintf(" Did you mean '%s'?", implode("' or '", $alternatives));
            }
            $io->getErrorStyle()
                ->error($error_msg);
            return FALSE;
        }
        return TRUE;
    }
    
    /**
     * Gets a list of profiles.
     *
     * @param bool $include_hidden
     *   (optional) Whether to include hidden profiles. Defaults to FALSE.
     * @param bool $auto_select_distributions
     *   (optional) Whether to only return the first distribution found.
     *
     * @return string[]
     *   An array of profile descriptions keyed by the profile machine name.
     */
    protected function getProfiles($include_hidden = FALSE, $auto_select_distributions = TRUE) {
        // Build a list of all available profiles.
        $listing = new ExtensionDiscovery(getcwd(), FALSE);
        $listing->setProfileDirectories([]);
        $profiles = [];
        $info_parser = new InfoParserDynamic(getcwd());
        foreach ($listing->scan('profile') as $profile) {
            $details = $info_parser->parse($profile->getPathname());
            // Don't show hidden profiles.
            if (!$include_hidden && !empty($details['hidden'])) {
                continue;
            }
            // Determine the name of the profile; default to the internal name if none
            // is specified.
            $name = $details['name'] ?? $profile->getName();
            $description = $details['description'] ?? $name;
            $profiles[$profile->getName()] = $description;
            if ($auto_select_distributions && !empty($details['distribution'])) {
                return [
                    $profile->getName() => $description,
                ];
            }
        }
        return $profiles;
    }

}