clacks/lib/clacks_web/controllers/inbox_controller.ex

defmodule ClacksWeb.InboxController do
  require Logger
  use ClacksWeb, :controller
  alias Clacks.Inbox

  plug Plug.Parsers, parsers: [:urlencoded, :json], json_decoder: Jason
  plug ClacksWeb.Plug.HTTPSignature

  def shared(conn, _params) do
    handle(conn, conn.body_params)
  end

  def user_specific(conn, _params) do
    handle(conn, conn.body_params)
  end

  def handle(conn, %{"type" => type} = activity) do
    case Inbox.handle(activity) do
      :ok ->
        put_status(conn, 200)

      {:error, reason} ->
        Logger.error("Could not handle incoming #{type} activity: #{inspect(reason)}")
        put_status(conn, 500)
    end
    |> json(%{})
  end
end