Noptin_New_Post_Notify::maybe_send_old_notification( $key )

	public function maybe_send_old_notification( $key ) {

		// Is it a bg_email?
		if ( 'bg_email' !== get_post_meta( $key, 'campaign_type', true ) ) {
			return;
		}

		// Ensure this is a new post notification.
		if ( 'new_post_notification' !== get_post_meta( $key, 'bg_email_type', true ) ) {
			return;
		}

		$campaign_id = get_post_meta( $key, 'associated_campaign', true );
		$post_id     = get_post_meta( $key, 'associated_post', true );

		$this->maybe_send_notification( $post_id, $campaign_id, $key );

	}