class SocialFacebookFormatter in Open Social 7

@file Facebook class

Hierarchy

• class \SocialFacebookFormatter

File

includes/social_comments.facebook.inc, line 8

Facebook class

class SocialFacebookFormatter {

  /**
   * {@inheritdoc}
   */
  public function __construct() {
    $this->app_id = variable_get('social_comments_facebook_app_id');
    $this->app_secret = variable_get('social_comments_facebook_app_secret');
    $this->expire = variable_get('social_comments_facebook_cache');
  }

  /**
   * {@inheritdoc}
   */
  public function getData($url, $count) {
    $this->max_items = $count;
    $this->access_token = $this
      ->getAccessToken();
    $post_id = $this->access_token ? $this
      ->getPostId($url) : FALSE;
    $comments = $post_id ? $this
      ->getComments($post_id) : FALSE;
    $output = $comments ? $this
      ->renderComments($comments) : array();
    return $output;
  }

  /**
   * Get access token.
   *
   * @return string
   *   String containing access token.
   */
  protected function getAccessToken() {

    // Set cache key.
    $cache_key = 'social_comments:facebook_access_token';
    $token = NULL;

    // Try to get comments from cache.
    if ($cache = cache_get($cache_key)) {
      $token = $cache->data;
    }
    else {
      $response_url = url('https://graph.facebook.com/oauth/access_token', array(
        'query' => array(
          'client_id' => $this->app_id,
          'client_secret' => $this->app_secret,
          'grant_type' => 'client_credentials',
        ),
      ));
      $data = drupal_http_request($response_url);
      if ($data->code != 200) {
        watchdog('social_comments', $data->error, array(), WATCHDOG_WARNING);
        return FALSE;
      }
      if ($data->data && strpos($data->data, 'access_token') === 0) {
        $token = drupal_substr($data->data, 13);

        // Set data to cache.
        cache_set($cache_key, $token);
      }
    }
    return $token;
  }

  /**
   * Parse post URL and get post ID.
   *
   * @param string $url
   *   Facebook post URL.
   *
   * @return string
   *   Post ID.
   */
  protected function getPostId($url) {
    $id = $uid = '';
    if (is_string($url)) {

      // Get URL path.
      $url = parse_url($url);
      if (!empty($url['path'])) {
        $parts = explode('/', $url['path']);

        // Get user ID.
        $username = $parts[1];
        $response_url = url('https://graph.facebook.com/' . $username, array(
          'query' => array(
            'access_token' => $this->access_token,
          ),
        ));
        $data = drupal_http_request($response_url);
        if ($data) {
          $data = drupal_json_decode($data->data);
          $uid = $data['id'];
        }
        $id = $uid;
        $id .= '_' . end($parts);
      }
    }
    return $id;
  }

  /**
   * Get facebook comments by post ID.
   *
   * @param string $id
   *   Post ID.
   *
   * @return array
   *   Array with comments.
   */
  protected function getComments($id) {
    $comments = array();

    // Set cache key for each post id.
    $cache_key = 'social_comments:facebook:' . $id;

    // Try to get comments fom cache.
    if ($cache = cache_get($cache_key)) {
      $comments = $cache->data;
    }
    else {
      $query = array(
        'access_token' => $this->access_token,
        'limit' => !empty($this->max_items) ? $this->max_items : NULL,
      );
      $query = array_filter($query);
      $response_url = url('https://graph.facebook.com/' . $id . '/comments', array(
        'query' => $query,
      ));
      $data = drupal_http_request($response_url);
      if ($data->code != 200) {
        drupal_set_message(t('Facebook comments error'), 'warning');
        watchdog('social_comments', $data->data, array(), WATCHDOG_WARNING);
        return FALSE;
      }
      $result = drupal_json_decode($data->data);
      if (!empty($result['data'])) {
        $comments = $result['data'];

        // Set data to cache.
        cache_set($cache_key, $comments, 'cache', $this->expire + REQUEST_TIME);
      }
    }
    return $comments;
  }

  /**
   * Parse facebook comments response.
   *
   * @param array $items
   *   JSON decoded string.
   *
   * @return array
   *   Array with comments.
   */
  protected function renderComments($items) {
    $comments = array();
    if (isset($items['data'])) {
      $items = $items['data'];
    }
    if (is_array($items)) {
      if (!empty($this->max_items)) {
        $items = array_slice($items, 0, $this->max_items);
      }
      foreach ($items as $item) {
        $data = array();

        // Get user data.
        $user = !empty($item['from']) ? $item['from'] : NULL;
        $userid = !empty($user['id']) ? check_plain($user['id']) : NULL;
        $data['id'] = check_plain($item['id']);
        $data['username'] = !empty($user['name']) ? check_plain($user['name']) : NULL;
        $data['user_url'] = !empty($userid) ? url('https://www.facebook.com/' . $userid) : NULL;
        $data['userphoto'] = !empty($userid) ? $this
          ->getUserPhoto($userid) : NULL;
        $data['text'] = filter_xss($item['message']);
        $data['timestamp'] = strtotime($item['created_time']);
        $comments[] = $data;
      }
    }
    return $comments;
  }

  /**
   * Returns photo of user.
   */
  protected function getUserPhoto($userid) {
    $response_url = 'http://graph.facebook.com/' . $userid . '/picture';
    return $response_url;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
SocialFacebookFormatter::getAccessToken	protected	function	Get access token.
SocialFacebookFormatter::getComments	protected	function	Get facebook comments by post ID.
SocialFacebookFormatter::getData	public	function
SocialFacebookFormatter::getPostId	protected	function	Parse post URL and get post ID.
SocialFacebookFormatter::getUserPhoto	protected	function	Returns photo of user.
SocialFacebookFormatter::renderComments	protected	function	Parse facebook comments response.
SocialFacebookFormatter::__construct	public	function