Refactor conversations controller create

      person_ids = current_user.contacts.mutual.where(column => params[recipients_param].split(",")).pluck(:person_id)

    end

    unless person_ids.present?

      render text: I18n.t("javascripts.conversation.create.no_recipient"), status: 422

      return

    end

    opts = params.require(:conversation).permit(:subject)

    opts[:participant_ids] = person_ids

    opts[:message] = { text: params[:conversation][:text] }

    @conversation = current_user.build_conversation(opts)

    if person_ids.present? && @conversation.save

    if @conversation.save

      Diaspora::Federation::Dispatcher.defer_dispatch(current_user, @conversation)

      flash[:notice] = I18n.t("conversations.create.sent")

      render json: {id: @conversation.id}

    else

      message = I18n.t("conversations.create.fail")

      if person_ids.blank?

        message = I18n.t("javascripts.conversation.create.no_recipient")

      end

      render text: message, status: 422

      render text: I18n.t("conversations.create.fail"), status: 422

    end

  end