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absinthe lib absinthe phase document validation utils message_suggestions.ex
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lib/absinthe/phase/document/validation/utils/message_suggestions.ex 

defmodule Absinthe.Phase.Document.Validation.Utils.MessageSuggestions do

  @suggest 5



  @doc """

  Generate an suggestions message for a incorrect field

  """

  def suggest_message(suggestions) do

    " Did you mean " <> to_quoted_or_list(suggestions |> Enum.take(@suggest)) <> "?"

  end



  def suggest_fragment_message(suggestions) do

    " Did you mean to use an inline fragment on " <>

      to_quoted_or_list(suggestions |> Enum.take(@suggest)) <> "?"

  end



  defp to_quoted_or_list([a]), do: ~s("#{a}")

  defp to_quoted_or_list([a, b]), do: ~s("#{a}" or "#{b}")

  defp to_quoted_or_list(other), do: to_longer_quoted_or_list(other)



  defp to_longer_quoted_or_list(list, acc \\ "")

  defp to_longer_quoted_or_list([word], acc), do: acc <> ~s(, or "#{word}")



  defp to_longer_quoted_or_list([word | rest], "") do

    rest

    |> to_longer_quoted_or_list(~s("#{word}"))

  end



  defp to_longer_quoted_or_list([word | rest], acc) do

    rest

    |> to_longer_quoted_or_list(acc <> ~s(, "#{word}"))

  end

end