social_follow_content.module in Open Social 8.5

The Social Follow Content module.

File

modules/social_features/social_follow_content/social_follow_content.module

<?php

/**
 * @file
 * The Social Follow Content module.
 */
use Drupal\Core\Link;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Url;
use Drupal\flag\Entity\Flag;
use Drupal\flag\Entity\Flagging;
use Drupal\flag\FlagInterface;
use Drupal\node\NodeInterface;

/**
 * Implements hook_ENTITY_TYPE_insert().
 */
function social_follow_content_event_enrollment_insert(EntityInterface $entity) {
  social_follow_content_event_enrollment_follow($entity);
}

/**
 * Implements hook_ENTITY_TYPE_update().
 */
function social_follow_content_event_enrollment_update(EntityInterface $entity) {
  social_follow_content_event_enrollment_follow($entity);
}

/**
 * Automatically follow content when user enrolls the event.
 */
function social_follow_content_event_enrollment_follow(EntityInterface $entity) {
  if ($entity->field_enrollment_status->value) {

    // Check if user already follow this content.
    // Only logged in users can follow content.
    $account = \Drupal::currentUser();
    if (!$account
      ->isAuthenticated()) {
      return;
    }
    $properties = [
      'uid' => $account
        ->id(),
      'entity_type' => 'node',
      'entity_id' => $entity->field_event->target_id,
      'flag_id' => 'follow_content',
    ];
    $flaggings = \Drupal::entityTypeManager()
      ->getStorage('flagging')
      ->loadByProperties($properties);
    $flagging = reset($flaggings);
    if (empty($flagging)) {
      $flagging = Flagging::create($properties);
      if ($flagging) {
        $flagging
          ->save();
        $message = t('You have successfully enrolled to this event. Also you are now following the event, which means you will receive notifications when a new comment is placed.');
        drupal_set_message($message);
      }
    }
  }
}

/**
 * Implements hook_social_user_account_header_account_links().
 *
 * Adds the "Following" link to the user menu.
 */
function social_follow_content_social_user_account_header_account_links(array $context) {
  return [
    'my_content' => [
      '#type' => 'link',
      '#attributes' => [
        'title' => new TranslatableMarkup("View content I'm following"),
      ],
      '#title' => new TranslatableMarkup('Following'),
      '#weight' => 1000,
    ] + Url::fromRoute('view.following.following')
      ->toRenderArray(),
  ];
}

/**
 * Implements hook_ENTITY_TYPE_insert().
 */
function social_follow_content_comment_insert(EntityInterface $entity) {

  /** @var \Drupal\comment\CommentInterface $entity */
  $entity = $entity
    ->getCommentedEntity();
  if (!$entity instanceof NodeInterface) {
    return;
  }
  $types = [];
  \Drupal::moduleHandler()
    ->alter('social_follow_content_types', $types);
  if (empty($types)) {
    return;
  }
  $flag = Flag::load('follow_content');
  if ($flag instanceof FlagInterface) {

    /** @var \Drupal\flag\FlagService $service */
    $service = \Drupal::service('flag');
    if (empty($service
      ->getFlagging($flag, $entity))) {
      $service
        ->flag($flag, $entity);

      // Get the unfollow link for this content.
      $url = Url::fromRoute('flag.action_link_unflag', [
        'flag' => $flag
          ->id(),
        'entity_id' => $entity
          ->id(),
      ]);

      // Set the real CSRF token.
      $url
        ->setOptions([
        'query' => [
          'token' => \Drupal::csrfToken()
            ->get($url
            ->getInternalPath()),
        ],
      ]);
      $flag_link = Link::fromTextAndUrl(t('Unfollow this content'), $url)
        ->toString();
      drupal_set_message(t('You are now automatically following this @type. @unfollow_link.', [
        '@type' => $entity
          ->getType(),
        '@unfollow_link' => $flag_link,
      ]));
    }
  }
}

Functions

Name	Description
social_follow_content_comment_insert	Implements hook_ENTITY_TYPE_insert().
social_follow_content_event_enrollment_follow	Automatically follow content when user enrolls the event.
social_follow_content_event_enrollment_insert	Implements hook_ENTITY_TYPE_insert().
social_follow_content_event_enrollment_update	Implements hook_ENTITY_TYPE_update().
social_follow_content_social_user_account_header_account_links	Implements hook_social_user_account_header_account_links().