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active_memory

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The typed, attribute-queryable in-memory store for ETS and Mnesia. A simple ORM with record expiry (TTL), crash resilience, and atomic take-once reads.

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active_memory lib query match_guards.ex
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lib/query/match_guards.ex 

defmodule ActiveMemory.Query.MatchGuards do

  @moduledoc false



  def build(table, query_map) do

    table.__attributes__(:query_fields)

    |> validate_query(query_map)

    |> build_match_tuple(query_map)

  end



  defp validate_query(attributes, query_map) do

    case Enum.all?(query_map, fn {key, _value} -> Enum.member?(attributes, key) end) do

      true -> {:ok, attributes}

      false -> {:error, :query_schema_mismatch}

    end

  end



  defp build_match_tuple({:ok, attributes}, query_map) do

    query =

      attributes

      |> Enum.into([], fn key -> Map.get(query_map, key, :_) end)

      |> List.to_tuple()



    {:ok, query}

  end



  defp build_match_tuple(error, _keywords), do: error

end