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nostrum

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An Elixir Discord library

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nostrum lib nostrum cache guild_cache base.ex
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lib/nostrum/cache/guild_cache/base.ex 

defmodule Nostrum.Cache.GuildCache.Base do

  @moduledoc false

  @moduledoc since: "0.8.0"



  alias Nostrum.Snowflake

  alias Nostrum.Util



  @spec upsert(%{required(Snowflake.t()) => struct}, Snowflake.t(), map, atom) ::

          {struct | nil, struct, %{required(Snowflake.t()) => struct}}

  def upsert(map, key, new, struct) do

    if Map.has_key?(map, key) do

      old = Map.get(map, key)



      new =

        old

        |> Map.from_struct()

        |> Map.merge(new)

        |> Util.cast({:struct, struct})



      new_map = Map.put(map, key, new)



      {old, new, new_map}

    else

      new = Util.cast(new, {:struct, struct})

      {nil, new, Map.put(map, key, new)}

    end

  end

end