public function facebookcomments::build in Facebook Comments Box 8

Builds and returns the renderable array for this block plugin.

If a block should not be rendered because it has no content, then this method must also ensure to return no content: it must then only return an empty array, or an empty array with #cache set (with cacheability metadata indicating the circumstances for it being empty).

Return value

array A renderable array representing the content of the block.

Overrides BlockPluginInterface::build

File

src/Plugin/Block/facebookcomments.php, line 18

Class

facebookcomments: Provides a 'Example: uppercase this please' block.

Namespace

Drupal\facebook_comments_box\Plugin\Block

Code

public function build() {
  $block = array();
  $fcb_title = '';
  $node_type = '';

  // Get which node types should have comments.
  $fcb_node_types = \Drupal::config('facebook_comments_box.settings')
    ->get('facebook_comments_box_node_types');

  // Figure out which node and nodetype we're on, puts comments only on
  // nodes (as opposed to the front page, views pages, term pages, etc.)
  if (arg(0) == 'node' && is_numeric(arg(1))) {
    $nid = arg(1);
    $node = node_load($nid);
    $node_type = $node->type;
    $fcb_title = check_plain($node->title);
  }
  if (isset($node_type) && in_array($node_type, $fcb_node_types) && $node->status) {

    // Figure out the current absolute URL.
    $path = isset($_GET['q']) ? $_GET['q'] : '<front>';
    $fcb_url = url($path, array(
      'absolute' => TRUE,
    ));

    // Meta mark up for the page.
    $markup = '<meta property="og:type" content="Article" />';
    $markup .= '<meta property="og:title" content="' . $fcb_title . '"/>';
    $markup .= '<meta property="og:url" content="' . $fcb_url . '"/>';
    $markup .= '<meta property="og:image" content="' . theme_get_setting('logo') . '"/>';
    $markup .= '<meta property="fb:admins" content="' . check_plain(variable_get('facebook_comments_box_admin_id', NULL)) . '">';

    // Setup the array.
    $metafcb = array(
      '#type' => 'markup',
      '#markup' => $markup,
    );

    // Add meta data to the HEAD.
    drupal_add_html_head($metafcb, 'meta-fcb');

    // Set the title of the block.
    $block['subject'] = t('Facebook Comments Box');

    // Set the content of the block.
    $fcb_content = '<div class="facebook-comments-box">';
    $fcb_content .= '<div id="fb-root"></div>';
    $fcb_content .= '<script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script>';
    $fcb_content .= '<fb:comments href="' . $fcb_url . '" ';
    $fcb_content .= ' num_posts="' . check_plain(variable_get('facebook_comments_box_default_comments', 10)) . '" ';
    $fcb_content .= ' width="' . check_plain(variable_get('facebook_comments_box_default_width', 400)) . '" ';
    $fcb_content .= ' colorscheme="' . variable_get('facebook_comments_box_default_theme', 'light') . '" ></fb:comments></div>';
    $block['content'] = $fcb_content;
  }
  return $block;
}

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