public function getCount($blog_id, $post_id = null, $datetime = null, $expire = null, $post_contact_id = null, $status = self::STATUS_PUBLISHED)
 {
     $where = array();
     $join = array();
     if ($datetime) {
         $where[] = "{$this->table}.datetime > '{$this->escape($datetime)}'";
         if ($contact_id = wa()->getUser()->getId()) {
             $where[] = "{$this->table}.contact_id != " . intval($contact_id);
         }
     }
     if ($post_contact_id = max(0, intval($post_contact_id))) {
         $post_model = new blogPostModel();
         $post_table = $post_model->getTableName();
         $post_table_id = $post_model->getTableId();
         $join[] = " INNER JOIN {$post_table} ON {$post_table}.{$post_table_id} = {$this->table}.post_id";
         $where[] = "{$post_table}.contact_id = {$post_contact_id}";
     }
     if ($status) {
         $where[] = $this->getWhereByField('status', $status, true);
     }
     if ($post_id) {
         $where[] = $this->getWhereByField('post_id', $post_id, true);
     }
     if ($blog_id !== null) {
         $where[] = $this->getWhereByField('blog_id', $blog_id, true);
     }
     if ($datetime) {
         $count_by_post = $post_id && is_array($post_id);
         if ($count_by_post) {
             $count = array_fill_keys($post_id, 0);
         } else {
             $count = 0;
         }
         $sql = "SELECT {$this->table}.{$this->id} AS {$this->id}, post_id FROM {$this->table} " . implode('', $join) . " WHERE (" . implode(') AND (', $where) . ")";
         if ($comments = $this->query($sql)->fetchAll($this->id, true)) {
             $blog_activity = blogActivity::getInstance();
             foreach ($comments as $id => $comment_post_id) {
                 if ($blog_activity->isNew("c.{$comment_post_id}", $id, $expire)) {
                     if ($count_by_post) {
                         ++$count[$comment_post_id];
                     } else {
                         ++$count;
                     }
                 }
             }
             $viewed_comments = array();
         }
     } elseif ($post_id && is_array($post_id)) {
         $sql = "SELECT post_id, COUNT(*) FROM {$this->table} " . implode('', $join) . " WHERE (" . implode(') AND (', $where) . ") GROUP BY post_id";
         $count = $this->query($sql)->fetchAll('post_id', true);
     } else {
         $sql = "SELECT COUNT(*) FROM {$this->table} " . implode('', $join) . " WHERE (" . implode(') AND (', $where) . ")";
         $count = $this->query($sql)->fetchField();
     }
     return $count;
 }