class InstallerConfigDirectoryTestBase

abstract class InstallerConfigDirectoryTestBase extends InstallerTestBase {
    
    /**
     * This is set by the profile in the core.extension extracted.
     *
     * If set to FALSE, then the install will proceed without an install profile.
     *
     * @var string|null|bool
     */
    protected $profile = NULL;
    
    /**
     * @var bool
     */
    protected $existingSyncDirectory = FALSE;
    
    /**
     * This copies a source directory to a destination directory recursively.
     *
     * @param string $source
     *   Source directory.
     * @param string $destination
     *   Destination directory.
     */
    protected function copyDirectory(string $source, string $destination) : void {
        if (!is_dir($destination)) {
            mkdir($destination, 0755, TRUE);
        }
        $files = scandir($source);
        foreach ($files as $file) {
            if ($file !== '.' && $file !== '..') {
                $sourceFile = $source . '/' . $file;
                $destinationFile = $destination . '/' . $file;
                if (is_dir($sourceFile)) {
                    $this->copyDirectory($sourceFile, $destinationFile);
                }
                else {
                    copy($sourceFile, $destinationFile);
                }
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function prepareEnvironment() {
        parent::prepareEnvironment();
        if ($this->profile === NULL) {
            $core_extension_location = $this->getConfigLocation() . '/core.extension.yml';
            $core_extension = Yaml::decode(file_get_contents($core_extension_location));
            $this->profile = $core_extension['profile'];
        }
        if ($this->profile !== FALSE) {
            // Create a profile for testing. We set core_version_requirement to '*' for
            // the test so that it does not need to be updated between major versions.
            $info = [
                'type' => 'profile',
                'core_version_requirement' => '*',
                'name' => 'Configuration installation test profile (' . $this->profile . ')',
            ];
            // File API functions are not available yet.
            $path = $this->siteDirectory . '/profiles/' . $this->profile;
            // Put the sync directory inside the profile.
            $config_sync_directory = $path . '/config/sync';
            mkdir($path, 0777, TRUE);
            file_put_contents("{$path}/{$this->profile}.info.yml", Yaml::encode($info));
        }
        else {
            // If we have no profile we must use an existing sync directory.
            $this->existingSyncDirectory = TRUE;
            $config_sync_directory = $this->siteDirectory . '/config/sync';
        }
        if ($this->existingSyncDirectory) {
            $config_sync_directory = $this->siteDirectory . '/config/sync';
            $this->settings['settings']['config_sync_directory'] = (object) [
                'value' => $config_sync_directory,
                'required' => TRUE,
            ];
        }
        // Create config/sync directory and extract tarball contents to it.
        mkdir($config_sync_directory, 0777, TRUE);
        $this->copyDirectory($this->getConfigLocation(), $config_sync_directory);
        // Add the module that is providing the database driver to the list of
        // modules that can not be uninstalled in the core.extension configuration.
        if (file_exists($config_sync_directory . '/core.extension.yml')) {
            $core_extension = Yaml::decode(file_get_contents($config_sync_directory . '/core.extension.yml'));
            $module = Database::getConnection()->getProvider();
            if ($module !== 'core') {
                $core_extension['module'][$module] = 0;
                $core_extension['module'] = module_config_sort($core_extension['module']);
            }
            if ($this->profile === FALSE && array_key_exists('profile', $core_extension)) {
                // Remove the profile.
                unset($core_extension['module'][$core_extension['profile']]);
                unset($core_extension['profile']);
                // Set a default theme to the first theme that will be installed as this
                // can not be retrieved from the profile.
                $this->defaultTheme = array_key_first($core_extension['theme']);
            }
            file_put_contents($config_sync_directory . '/core.extension.yml', Yaml::encode($core_extension));
        }
    }
    
    /**
     * Gets the path to the configuration directory.
     *
     * The directory will be copied to the install profile's config/sync
     * directory for testing.
     *
     * @return string
     *   The path to the configuration directory.
     */
    protected abstract function getConfigLocation();
    
    /**
     * {@inheritdoc}
     */
    protected function installParameters() {
        $parameters = parent::installParameters();
        // The options that change configuration are disabled when installing from
        // existing configuration.
        unset($parameters['forms']['install_configure_form']['site_name']);
        unset($parameters['forms']['install_configure_form']['site_mail']);
        unset($parameters['forms']['install_configure_form']['enable_update_status_module']);
        unset($parameters['forms']['install_configure_form']['enable_update_status_emails']);
        return $parameters;
    }
    
    /**
     * Confirms that the installation installed the configuration correctly.
     */
    public function testConfigSync() : void {
        // After installation there is no snapshot and nothing to import.
        $change_list = $this->configImporter()
            ->getStorageComparer()
            ->getChangelist();
        $expected = [
            'create' => [],
            // The system.mail is changed configuration because the test system
            // changes it to ensure that mails are not sent.
'update' => [
                'system.mail',
            ],
            'delete' => [],
            'rename' => [],
        ];
        $this->assertEquals($expected, $change_list);
    }
    
    /**
     * Installer step: Select installation profile.
     */
    protected function setUpProfile() {
        if ($this->existingSyncDirectory) {
            $edit = [
                'profile' => SelectProfileForm::CONFIG_INSTALL_PROFILE_KEY,
            ];
            $this->submitForm($edit, $this->translations['Save and continue']);
        }
        else {
            parent::setUpProfile();
        }
    }

}