class ContainerInfoController

class ContainerInfoController extends ControllerBase implements ContainerAwareInterface {
    use ContainerAwareTrait;
    
    /**
     * The drupal kernel.
     *
     * @var \Drupal\Core\DrupalKernelInterface
     */
    protected $kernel;
    
    /**
     * The dumper manager service.
     *
     * @var \Drupal\devel\DevelDumperManagerInterface
     */
    protected $dumper;
    
    /**
     * ServiceInfoController constructor.
     *
     * @param \Drupal\Core\DrupalKernelInterface $drupalKernel
     *   The drupal kernel.
     * @param \Drupal\devel\DevelDumperManagerInterface $dumper
     *   The dumper manager service.
     */
    public function __construct(DrupalKernelInterface $drupalKernel, DevelDumperManagerInterface $dumper) {
        $this->kernel = $drupalKernel;
        $this->dumper = $dumper;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('kernel'), $container->get('devel.dumper'));
    }
    
    /**
     * Builds the services overview page.
     *
     * @return array
     *   A render array as expected by the renderer.
     */
    public function serviceList() {
        $headers = [
            $this->t('ID'),
            $this->t('Class'),
            $this->t('Alias'),
            $this->t('Operations'),
        ];
        $rows = [];
        if ($container = $this->kernel
            ->getCachedContainerDefinition()) {
            foreach ($container['services'] as $service_id => $definition) {
                $service = unserialize($definition);
                $row['id'] = [
                    'data' => $service_id,
                    'class' => 'table-filter-text-source',
                ];
                $row['class'] = [
                    'data' => isset($service['class']) ? $service['class'] : '',
                    'class' => 'table-filter-text-source',
                ];
                $row['alias'] = [
                    'data' => array_search($service_id, $container['aliases']) ?: '',
                    'class' => 'table-filter-text-source',
                ];
                $row['operations']['data'] = [
                    '#type' => 'operations',
                    '#links' => [
                        'devel' => [
                            'title' => $this->t('Devel'),
                            'url' => Url::fromRoute('devel.container_info.service.detail', [
                                'service_id' => $service_id,
                            ]),
                        ],
                    ],
                ];
                $rows[$service_id] = $row;
            }
            ksort($rows);
        }
        $output['#attached']['library'][] = 'system/drupal.system.modules';
        $output['filters'] = [
            '#type' => 'container',
            '#attributes' => [
                'class' => [
                    'table-filter',
                    'js-show',
                ],
            ],
        ];
        $output['filters']['text'] = [
            '#type' => 'search',
            '#title' => $this->t('Search'),
            '#size' => 30,
            '#placeholder' => $this->t('Enter service id, alias or class'),
            '#attributes' => [
                'class' => [
                    'table-filter-text',
                ],
                'data-table' => '.devel-filter-text',
                'autocomplete' => 'off',
                'title' => $this->t('Enter a part of the service id, service alias or class to filter by.'),
            ],
        ];
        $output['services'] = [
            '#type' => 'table',
            '#header' => $headers,
            '#rows' => $rows,
            '#empty' => $this->t('No services found.'),
            '#sticky' => TRUE,
            '#attributes' => [
                'class' => [
                    'devel-service-list',
                    'devel-filter-text',
                ],
            ],
        ];
        return $output;
    }
    
    /**
     * Returns a render array representation of the service.
     *
     * @param string $service_id
     *   The ID of the service to retrieve.
     *
     * @return array
     *   A render array containing the service detail.
     *
     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
     *   If the requested service is not defined.
     */
    public function serviceDetail($service_id) {
        $instance = $this->container
            ->get($service_id, ContainerInterface::NULL_ON_INVALID_REFERENCE);
        if ($instance === NULL) {
            throw new NotFoundHttpException();
        }
        $output = [];
        if ($cached_definitions = $this->kernel
            ->getCachedContainerDefinition()) {
            // Tries to retrieve the service definition from the kernel's cached
            // container definition.
            if (isset($cached_definitions['services'][$service_id])) {
                $definition = unserialize($cached_definitions['services'][$service_id]);
                // If the service has an alias add it to the definition.
                if ($alias = array_search($service_id, $cached_definitions['aliases'])) {
                    $definition['alias'] = $alias;
                }
                $output['definition'] = $this->dumper
                    ->exportAsRenderable($definition, $this->t('Computed Definition'));
            }
        }
        $output['instance'] = $this->dumper
            ->exportAsRenderable($instance, $this->t('Instance'));
        return $output;
    }
    
    /**
     * Builds the parameters overview page.
     *
     * @return array
     *   A render array as expected by the renderer.
     */
    public function parameterList() {
        $headers = [
            $this->t('Name'),
            $this->t('Operations'),
        ];
        $rows = [];
        if ($container = $this->kernel
            ->getCachedContainerDefinition()) {
            foreach ($container['parameters'] as $parameter_name => $definition) {
                $row['name'] = [
                    'data' => $parameter_name,
                    'class' => 'table-filter-text-source',
                ];
                $row['operations']['data'] = [
                    '#type' => 'operations',
                    '#links' => [
                        'devel' => [
                            'title' => $this->t('Devel'),
                            'url' => Url::fromRoute('devel.container_info.parameter.detail', [
                                'parameter_name' => $parameter_name,
                            ]),
                        ],
                    ],
                ];
                $rows[$parameter_name] = $row;
            }
            ksort($rows);
        }
        $output['#attached']['library'][] = 'system/drupal.system.modules';
        $output['filters'] = [
            '#type' => 'container',
            '#attributes' => [
                'class' => [
                    'table-filter',
                    'js-show',
                ],
            ],
        ];
        $output['filters']['text'] = [
            '#type' => 'search',
            '#title' => $this->t('Search'),
            '#size' => 30,
            '#placeholder' => $this->t('Enter parameter name'),
            '#attributes' => [
                'class' => [
                    'table-filter-text',
                ],
                'data-table' => '.devel-filter-text',
                'autocomplete' => 'off',
                'title' => $this->t('Enter a part of the parameter name to filter by.'),
            ],
        ];
        $output['parameters'] = [
            '#type' => 'table',
            '#header' => $headers,
            '#rows' => $rows,
            '#empty' => $this->t('No parameters found.'),
            '#sticky' => TRUE,
            '#attributes' => [
                'class' => [
                    'devel-parameter-list',
                    'devel-filter-text',
                ],
            ],
        ];
        return $output;
    }
    
    /**
     * Returns a render array representation of the parameter value.
     *
     * @param string $parameter_name
     *   The name of the parameter to retrieve.
     *
     * @return array
     *   A render array containing the parameter value.
     *
     * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
     *   If the requested parameter is not defined.
     */
    public function parameterDetail($parameter_name) {
        try {
            $parameter = $this->container
                ->getParameter($parameter_name);
        } catch (ParameterNotFoundException $e) {
            throw new NotFoundHttpException();
        }
        return $this->dumper
            ->exportAsRenderable($parameter);
    }

}