file_stream

defprotocol FileStream.Resource do
  @moduledoc """
  A protocol to stream a file-like resource.
  """

  @typedoc """
  A streamable resource.
  """
  @type t :: term()

  @doc """
  Returns a `FileStream` for the given resource.
  """
  @spec stream!(t(), keyword()) :: FileStream.t()
  def stream!(resource, opts)
end

defimpl FileStream.Resource, for: BitString do
  @moduledoc false

  @spec stream!(String.t(), keyword()) :: FileStream.t()
  def stream!(string, opts) do
    string
    |> URI.parse()
    |> FileStream.stream!(opts)
  end
end

defimpl FileStream.Resource, for: URI do
  @moduledoc false

  @spec stream!(URI.t(), keyword()) :: FileStream.t()
  def stream!(uri, opts) do
    storage = FileStream.Storage.from_uri!(uri)
    config = storage.init(opts)
    %FileStream{uri: uri, storage: storage, config: config}
  end
end