class DevelController

class DevelController extends ControllerBase {
    
    /**
     * The dumper service.
     *
     * @var \Drupal\devel\DevelDumperManagerInterface
     */
    protected $dumper;
    
    /**
     * EntityDebugController constructor.
     *
     * @param \Drupal\devel\DevelDumperManagerInterface $dumper
     *   The dumper service.
     */
    public function __construct(DevelDumperManagerInterface $dumper) {
        $this->dumper = $dumper;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('devel.dumper'));
    }
    
    /**
     * Clears all caches, then redirects to the previous page.
     */
    public function cacheClear() {
        drupal_flush_all_caches();
        drupal_set_message('Cache cleared.');
        return $this->redirect('<front>');
    }
    public function themeRegistry() {
        $hooks = theme_get_registry();
        ksort($hooks);
        return $this->dumper
            ->exportAsRenderable($hooks);
    }
    
    /**
     * Builds the fields info overview page.
     *
     * @return array
     *   Array of page elements to render.
     */
    public function fieldInfoPage() {
        $fields = FieldStorageConfig::loadMultiple();
        ksort($fields);
        $output['fields'] = $this->dumper
            ->exportAsRenderable($fields, $this->t('Fields'));
        $field_instances = FieldConfig::loadMultiple();
        ksort($field_instances);
        $output['instances'] = $this->dumper
            ->exportAsRenderable($field_instances, $this->t('Instances'));
        $bundles = \Drupal::service('entity_type.bundle.info')->getAllBundleInfo();
        ksort($bundles);
        $output['bundles'] = $this->dumper
            ->exportAsRenderable($bundles, $this->t('Bundles'));
        $field_types = \Drupal::service('plugin.manager.field.field_type')->getUiDefinitions();
        ksort($field_types);
        $output['field_types'] = $this->dumper
            ->exportAsRenderable($field_types, $this->t('Field types'));
        $formatter_types = \Drupal::service('plugin.manager.field.formatter')->getDefinitions();
        ksort($formatter_types);
        $output['formatter_types'] = $this->dumper
            ->exportAsRenderable($formatter_types, $this->t('Formatter types'));
        $widget_types = \Drupal::service('plugin.manager.field.widget')->getDefinitions();
        ksort($widget_types);
        $output['widget_types'] = $this->dumper
            ->exportAsRenderable($widget_types, $this->t('Widget types'));
        return $output;
    }
    
    /**
     * Builds the state variable overview page.
     *
     * @return array
     *   Array of page elements to render.
     */
    public function stateSystemPage() {
        $output['#attached']['library'][] = 'system/drupal.system.modules';
        $output['filters'] = array(
            '#type' => 'container',
            '#attributes' => array(
                'class' => array(
                    'table-filter',
                    'js-show',
                ),
            ),
        );
        $output['filters']['text'] = array(
            '#type' => 'search',
            '#title' => $this->t('Search'),
            '#size' => 30,
            '#placeholder' => $this->t('Enter state name'),
            '#attributes' => array(
                'class' => array(
                    'table-filter-text',
                ),
                'data-table' => '.devel-state-list',
                'autocomplete' => 'off',
                'title' => $this->t('Enter a part of the state name to filter by.'),
            ),
        );
        $can_edit = $this->currentUser()
            ->hasPermission('administer site configuration');
        $header = array(
            'name' => $this->t('Name'),
            'value' => $this->t('Value'),
        );
        if ($can_edit) {
            $header['edit'] = $this->t('Operations');
        }
        $rows = array();
        // State class doesn't have getAll method so we get all states from the
        // KeyValueStorage.
        foreach ($this->keyValue('state')
            ->getAll() as $state_name => $state) {
            $rows[$state_name] = array(
                'name' => array(
                    'data' => $state_name,
                    'class' => 'table-filter-text-source',
                ),
                'value' => array(
                    'data' => $this->dumper
                        ->export($state),
                ),
            );
            if ($can_edit) {
                $operations['edit'] = array(
                    'title' => $this->t('Edit'),
                    'url' => Url::fromRoute('devel.system_state_edit', array(
                        'state_name' => $state_name,
                    )),
                );
                $rows[$state_name]['edit'] = array(
                    'data' => array(
                        '#type' => 'operations',
                        '#links' => $operations,
                    ),
                );
            }
        }
        $output['states'] = array(
            '#type' => 'table',
            '#header' => $header,
            '#rows' => $rows,
            '#empty' => $this->t('No state variables found.'),
            '#attributes' => array(
                'class' => array(
                    'devel-state-list',
                ),
            ),
        );
        return $output;
    }
    
    /**
     * Builds the session overview page.
     *
     * @return array
     *   Array of page elements to render.
     */
    public function session() {
        $output['description'] = array(
            '#markup' => '<p>' . $this->t('Here are the contents of your $_SESSION variable.') . '</p>',
        );
        $output['session'] = array(
            '#type' => 'table',
            '#header' => array(
                $this->t('Session name'),
                $this->t('Session ID'),
            ),
            '#rows' => array(
                array(
                    session_name(),
                    session_id(),
                ),
            ),
            '#empty' => $this->t('No session available.'),
        );
        $output['data'] = $this->dumper
            ->exportAsRenderable($_SESSION);
        return $output;
    }

}