mongodb

defmodule BSON do
  @moduledoc """
  Functions for encoding and decoding BSON documents.
  """

  @type t ::
          document
          | String.t()
          | atom
          | number
          | boolean
          | BSON.Binary.t()
          | BSON.ObjectId.t()
          | BSON.Regex.t()
          | BSON.JavaScript.t()
          | BSON.Timestamp.t()
          | [t]
  @type document ::
          %{atom => BSON.t()}
          | %{String.t() => BSON.t()}
          | [{atom, BSON.t()}]
          | [{String.t(), BSON.t()}]

  @doc """
  Encode a BSON document to `iodata`.
  """
  @spec encode(document) :: iodata
  def encode(map) when is_map(map) do
    BSON.Encoder.encode(map)
  end

  def encode([{_, _} | _] = keyword) do
    BSON.Encoder.encode(keyword)
  end

  @doc """
  Decode `iodata` to a BSON document.
  """
  @spec decode(iodata) :: document
  def decode(iodata) do
    iodata
    |> IO.iodata_to_binary()
    |> BSON.Decoder.decode()
  end
end