class Search
  def execute(user, form)
    filtered(MyModel, form, user).paginate(**opts)
  end

  def filtered(results, form, user)
    %i[
      current_user
      cancelled
      credit_issued
      credit_requested
    ]
    .select { |f| form.send(f).nil? }
    .each { |f| results = send("filter_by_#{f}", results) }
  end

  def filter_by_current_user
    # some code
  end

  def filter_by_cancelled
    # some code
  end

  def filter_by_credit_issued
    # some code
  end

  def filter_by_credit_requested
    # some code
  end
end