SettingsForm.php

<?php

namespace Drupal\advagg_js_minify\Form;

use Drupal\advagg\AdvaggSettersTrait;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Configure advagg_js_minify settings for this site.
 */
class SettingsForm extends ConfigFormBase {
    use AdvaggSettersTrait;
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        
        /**
         * @var \Drupal\advagg_js_minify\Form\SettingsForm
         */
        $instance = parent::create($container);
        $instance->setCache($container->get('cache.advagg'));
        return $instance;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return 'advagg_js_minify_settings';
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getEditableConfigNames() {
        return [
            'advagg_js_minify.settings',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        
        /** @var \Drupal\Core\Config\Config $config */
        $config = $this->config('advagg_js_minify.settings');
        $form = [];
        if ($this->config('advagg.settings')
            ->get('cache_level') === 0) {
            $form['advagg_devel_msg'] = [
                '#markup' => '<p>' . $this->t('The settings below will not have any effect because AdvAgg is currently in <a href="@devel">development mode</a>. Once the cache settings have been set to a non-development level, JS minification will take place.', [
                    '@devel' => Url::fromRoute('advagg.settings', [], [
                        'fragment' => 'edit-advagg-cache-level',
                    ])->toString(),
                ]) . '</p>',
            ];
        }
        $options = [
            0 => $this->t('Disabled'),
            1 => $this->t('JSMin+ ~1300ms'),
            // 2 => $this->t('Packer ~500ms'),
            // 3 is JSMin c extension.
4 => $this->t('JShrink ~1000ms'),
            5 => $this->t('JSqueeze ~600ms'),
        ];
        if (function_exists('jsmin')) {
            $options[3] = $this->t('JSMin ~2ms');
            $description = $this->t('JSMin is the very fast C complied version. Recommend using it.');
        }
        else {
            $description = $this->t('You can use the much faster C version of JSMin (~2ms) by installing the <a href="@php_jsmin">JSMin PHP Extension</a> on this server.', [
                '@php_jsmin' => 'https://github.com/sqmk/pecl-jsmin/',
            ]);
        }
        $form['minifier'] = [
            '#type' => 'radios',
            '#title' => $this->t('Minification: Select a minifier'),
            '#default_value' => $config->get('minifier'),
            '#options' => $options,
            '#description' => $description,
        ];
        $form['add_license'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Add licensing comments'),
            '#default_value' => $config->get('add_license'),
            '#description' => $this->t("If unchecked, the Advanced Aggregation module's licensing comments\n      will be omitted from the aggregated files. Omitting the comments will produce somewhat better scores in\n      some automated security scans but otherwise should not affect your site. These are included by default in order to better follow the spirit of the GPL by providing the source for javascript files."),
        ];
        return parent::buildForm($form, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        
        /** @var \Drupal\Core\Config\Config $config */
        $config = $this->config('advagg_js_minify.settings');
        // Clear Caches.
        Cache::invalidateTags([
            'library_info',
        ]);
        $this->cache
            ->invalidateAll();
        // Save settings.
        $config->set('add_license', $form_state->getValue('add_license'))
            ->set('minifier', $form_state->getValue('minifier'))
            ->save();
        parent::submitForm($form, $form_state);
    }

}