AjaxController.php in Private Message 8

Namespace

Drupal\private_message\Controller

File

src/Controller/AjaxController.php

<?php

namespace Drupal\private_message\Controller;

use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Controller\ControllerBase;
use Drupal\Core\Entity\EntityManagerInterface;
use Drupal\Core\Render\RendererInterface;
use Drupal\Core\Session\AccountProxyInterface;
use Drupal\private_message\Ajax\PrivateMessageInboxUpdateCommand;
use Drupal\private_message\Ajax\PrivateMessageInsertNewMessagesCommand;
use Drupal\private_message\Ajax\PrivateMessageInboxInsertThreadsCommand;
use Drupal\private_message\Ajax\PrivateMessageInsertPreviousMessagesCommand;
use Drupal\private_message\Ajax\PrivateMessageInsertThreadCommand;
use Drupal\private_message\Ajax\PrivateMessageMembersAutocompleteResponseCommand;
use Drupal\private_message\Ajax\PrivateMessageMemberUsernameValidatedCommand;
use Drupal\private_message\Ajax\PrivateMessageUpdateUnreadThreadCountCommand;
use Drupal\private_message\Entity\PrivateMessageThread;
use Drupal\private_message\Service\PrivateMessageServiceInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\HttpFoundation\RequestStack;

/**
 * Controller to handle Ajax requests.
 */
class AjaxController extends ControllerBase implements AjaxControllerInterface {
  const AUTOCOMPLETE_COUNT = 10;

  /**
   * The renderer service.
   *
   * @var \Drupal\Core\Render\RendererInterface
   */
  protected $renderer;

  /**
   * The request stack.
   *
   * @var \Symfony\Component\HttpFoundation\RequestStack
   */
  protected $requestStack;

  /**
   * The entity manager service.
   *
   * @var \Drupal\Core\Entity\EntityManagerInterface
   */
  protected $entityManager;

  /**
   * The configuration factory.
   *
   * @var \Drupal\Core\Config\ConfigFactoryInterface
   */
  protected $configFactory;

  /**
   * The current user.
   *
   * @var \Drupal\Core\Session\AccountProxyInterface
   */
  protected $currentUser;

  /**
   * The private message service.
   *
   * @var \Drupal\private_message\Service\PrivateMessageServiceInterface
   */
  protected $privateMessageService;

  /**
   * Constructs n AjaxController object.
   *
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer service.
   * @param \Symfony\Component\HttpFoundation\RequestStack $requestStack
   *   The request stack.
   * @param \Drupal\Core\Entity\EntityManagerInterface $entityManager
   *   The entity manager service.
   * @param \Drupal\Core\Config\ConfigFactoryInterface $configFactory
   *   The configuration factory.
   * @param \Drupal\Core\Session\AccountProxyInterface $currentUser
   *   The current user.
   * @param \Drupal\private_message\Service\PrivateMessageServiceInterface $privateMessageService
   *   The private message service.
   */
  public function __construct(RendererInterface $renderer, RequestStack $requestStack, EntityManagerInterface $entityManager, ConfigFactoryInterface $configFactory, AccountProxyInterface $currentUser, PrivateMessageServiceInterface $privateMessageService) {
    $this->renderer = $renderer;
    $this->requestStack = $requestStack;
    $this->entityManager = $entityManager;
    $this->configFactory = $configFactory;
    $this->currentUser = $currentUser;
    $this->privateMessageService = $privateMessageService;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('renderer'), $container
      ->get('request_stack'), $container
      ->get('entity.manager'), $container
      ->get('config.factory'), $container
      ->get('current_user'), $container
      ->get('private_message.service'));
  }

  /**
   * {@inheritdoc}
   */
  public function ajaxCallback($op) {
    $response = new AjaxResponse();
    if ($this->currentUser
      ->hasPermission('use private messaging system')) {
      switch ($op) {
        case 'get_new_messages':
          $this
            ->getNewPrivateMessages($response);
          break;
        case 'get_old_messages':
          $this
            ->getOldPrivateMessages($response);
          break;
        case 'get_old_inbox_threads':
          $this
            ->getOldInboxThreads($response);
          break;
        case 'get_new_inbox_threads':
          $this
            ->getNewInboxThreads($response);
          break;
        case 'validate_private_message_member_username':
          $this
            ->validatePrivateMessageMemberUsername($response);
          break;
        case 'get_new_unread_thread_count':
          $this
            ->getNewUnreadThreadCount($response);
          break;
        case 'load_thread':
          $this
            ->loadThread($response);
          break;
      }
    }
    return $response;
  }

  /**
   * {@inheritdoc}
   */
  public function privateMessageMembersAutocomplete() {
    $response = new AjaxResponse();
    $username = $this->requestStack
      ->getCurrentRequest()
      ->get('username');
    $accounts = $this->privateMessageService
      ->getUsersFromString($username, self::AUTOCOMPLETE_COUNT);
    $user_info = [];
    foreach ($accounts as $account) {
      if ($account
        ->access('view', $this->currentUser)) {
        $user_info[] = [
          'uid' => $account
            ->id(),
          'username' => $account
            ->getDisplayName(),
        ];
      }
    }
    $response
      ->addCommand(new PrivateMessageMembersAutocompleteResponseCommand($username, $user_info));
    return $response;
  }

  /**
   * Creates an Ajax Command containing new private message.
   *
   * @param Drupal\Core\Ajax\AjaxResponse $response
   *   The response to which any commands should be attached.
   */
  protected function getNewPrivateMessages(AjaxResponse $response) {
    $thread_id = $this->requestStack
      ->getCurrentRequest()
      ->get('threadid');
    $message_id = $this->requestStack
      ->getCurrentRequest()
      ->get('messageid');
    if (is_numeric($thread_id) && is_numeric($message_id)) {
      $new_messages = $this->privateMessageService
        ->getNewMessages($thread_id, $message_id);
      if (count($new_messages)) {
        $messages = [];
        $view_builder = $this->entityManager
          ->getViewBuilder('private_message');
        foreach ($new_messages as $message) {
          if ($message
            ->access('view', $this->currentUser)) {
            $messages[] = $view_builder
              ->view($message);
          }
        }
        $response
          ->addCommand(new PrivateMessageInsertNewMessagesCommand($this->renderer
          ->renderRoot($messages)));
      }
    }
  }

  /**
   * Create an Ajax Command containing old private messages.
   *
   * @param Drupal\Core\Ajax\AjaxResponse $response
   *   The response to which any commands should be attached.
   */
  protected function getOldPrivateMessages(AjaxResponse $response) {
    $current_request = $this->requestStack
      ->getCurrentRequest();
    $thread_id = $current_request
      ->get('threadid');
    $message_id = $current_request
      ->get('messageid');
    if (is_numeric($thread_id) && is_numeric($message_id)) {
      $message_info = $this->privateMessageService
        ->getPreviousMessages($thread_id, $message_id);
      if (count($message_info)) {
        $messages = [];
        $view_builder = $this->entityManager
          ->getViewBuilder('private_message');
        foreach ($message_info as $message) {
          if ($message
            ->access('view', $this->currentUser)) {
            $messages[] = $view_builder
              ->view($message);
          }
        }
        $response
          ->addCommand(new PrivateMessageInsertPreviousMessagesCommand($this->renderer
          ->renderRoot($messages)));
      }
      else {
        $response
          ->addCommand(new PrivateMessageInsertPreviousMessagesCommand(''));
      }
    }
  }

  /**
   * Creates and Ajax Command containing old threads for the inbox.
   *
   * @param Drupal\Core\Ajax\AjaxResponse $response
   *   The response to which any commands should be attached.
   */
  protected function getOldInboxThreads(AjaxResponse $response) {
    $timestamp = $this->requestStack
      ->getCurrentRequest()
      ->get('timestamp');
    $thread_count = $this->requestStack
      ->getCurrentRequest()
      ->get('count');
    if (is_numeric($timestamp)) {
      $thread_info = $this->privateMessageService
        ->getThreadsForUser($thread_count, $timestamp);
      if (count($thread_info['threads'])) {
        $oldest_timestamp = FALSE;
        $view_builder = $this->entityManager
          ->getViewBuilder('private_message_thread');
        $threads = [];
        foreach ($thread_info['threads'] as $thread) {
          if ($thread
            ->access('view', $this->currentUser)) {
            if ($thread_info['next_exists']) {
              $oldest_timestamp = $thread
                ->get('updated')->value;
            }
            $threads[] = $view_builder
              ->view($thread, 'inbox');
          }
        }
        $response
          ->addCommand(new PrivateMessageInboxInsertThreadsCommand($this->renderer
          ->renderRoot($threads), $oldest_timestamp));
      }
      else {
        $response
          ->addCommand(new PrivateMessageInboxInsertThreadsCommand('', FALSE));
      }
    }
  }

  /**
   * Creates an Ajax Command with new threads for the private message inbox.
   *
   * @param Drupal\Core\Ajax\AjaxResponse $response
   *   The response to which any commands should be attached.
   */
  protected function getNewInboxThreads(AjaxResponse $response) {
    $info = $this->requestStack
      ->getCurrentRequest()
      ->get('ids');

    // Check to see if any thread IDs were POSTed.
    if (is_array($info) && count($info)) {

      // Get new inbox information based on the posted IDs.
      $inbox_threads = $this->privateMessageService
        ->getUpdatedInboxThreads($info);
    }
    else {

      // No IDs were posted, so the maximum possible number of threads to be
      // returned is retrieved from the block settings.
      $thread_count = $this->configFactory
        ->get('block.block.privatemessageinbox')
        ->get('settings.thread_count');
      $inbox_threads = $this->privateMessageService
        ->getUpdatedInboxThreads([], $thread_count);
    }

    // Only need to do something if any thread IDS were found.
    if (count($inbox_threads['thread_ids'])) {
      $view_builder = $this->entityManager
        ->getViewBuilder('private_message_thread');

      // Render any new threads as HTML to be sent to the browser.
      $rendered_threads = [];
      foreach (array_keys($inbox_threads['new_threads']) as $thread_id) {
        if ($inbox_threads['new_threads'][$thread_id]
          ->access('view', $this->currentUser)) {
          $renderable = $view_builder
            ->view($inbox_threads['new_threads'][$thread_id], 'inbox');
          $rendered_threads[$thread_id] = $this->renderer
            ->renderRoot($renderable);
        }
      }

      // Add the command that will tell the inbox which thread items to update.
      $response
        ->addCommand(new PrivateMessageInboxUpdateCommand($inbox_threads['thread_ids'], $rendered_threads));
    }
  }

  /**
   * Create Ajax Command determining whether a given username is valid.
   *
   * @param Drupal\Core\Ajax\AjaxResponse $response
   *   The response to which any commands should be attached.
   */
  protected function validatePrivateMessageMemberUsername(AjaxResponse $response) {
    $username = $this->requestStack
      ->getCurrentRequest()
      ->get('username');
    $valid = $this->privateMessageService
      ->validatePrivateMessageMemberUsername($username);
    $response
      ->addCommand(new PrivateMessageMemberUsernameValidatedCommand($username, $valid));
  }

  /**
   * Create Ajax Command returning the number of unread private message threads.
   *
   * Only messages created since the current user last visited the private
   * message page are shown.
   *
   * @param Drupal\Core\Ajax\AjaxResponse $response
   *   The response to which any commands should be attached.
   */
  protected function getNewUnreadThreadCount(AjaxResponse $response) {
    $unread_thread_count = $this->privateMessageService
      ->getUnreadThreadCount();
    $response
      ->addCommand(new PrivateMessageUpdateUnreadThreadCountCommand($unread_thread_count));
  }

  /**
   * Load a private message thread to be dynamically inserted into the page.
   *
   * @param Drupal\Core\Ajax\AjaxResponse $response
   *   The response to which any commands should be attached.
   */
  protected function loadThread(AjaxResponse $response) {
    $thread_id = $this->requestStack
      ->getCurrentRequest()
      ->get('id');
    if ($thread_id) {
      $thread = PrivateMessageThread::load($thread_id);
      if ($thread && $thread
        ->access('view', $this->currentUser)) {
        $this->privateMessageService
          ->updateLastCheckTime();
        $view_builder = $this->entityManager
          ->getViewBuilder('private_message_thread');
        $renderable = $view_builder
          ->view($thread);
        $rendered_thread = $this->renderer
          ->renderRoot($renderable);
        $index = array_search('private_message/private_message_thread', $renderable['#attached']['library']);
        unset($renderable['#attached']['library'][$index]);
        $response
          ->setAttachments($renderable['#attached']);
        $response
          ->addCommand(new PrivateMessageInsertThreadCommand($rendered_thread));
        $unread_thread_count = $this->privateMessageService
          ->getUnreadThreadCount();
        $response
          ->addCommand(new PrivateMessageUpdateUnreadThreadCountCommand($unread_thread_count));
      }
    }
  }

}

Classes

Name	Description
AjaxController	Controller to handle Ajax requests.