implement github oauth and display user's name and avatar from it

lib/entendu/application.ex

@@ -6,12 +6,6 @@ defmodule Entendu.Application do
   use Application
 
   def start(_type, _args) do
-    # topologies = [
-    #   chat: [
-    #     strategy: Cluster.Strategy.Gossip
-    #   ]
-    # ]
-
     topologies = [
       k8s_entendu: [
         strategy: Elixir.Cluster.Strategy.Kubernetes.DNS,

lib/entendu/user_from_auth.ex

@@ -0,0 +1,47 @@
+defmodule Entendu.UserFromAuth do
+  @moduledoc """
+  Retrieve the user information from an auth request
+  """
+  require Logger
+  require Jason
+
+  alias Ueberauth.Auth
+
+  def find_or_create(%Auth{} = auth) do
+    {:ok, basic_info(auth)}
+  end
+
+  # github does it this way
+  defp avatar_from_auth(%{info: %{urls: %{avatar_url: image}}}), do: image
+
+  # facebook does it this way
+  defp avatar_from_auth(%{info: %{image: image}}), do: image
+
+  # default case if nothing matches
+  defp avatar_from_auth(auth) do
+    Logger.warn("#{auth.provider} needs to find an avatar URL!")
+    Logger.debug(Jason.encode!(auth))
+    nil
+  end
+
+  defp basic_info(auth) do
+    IO.inspect(auth)
+    %{id: auth.uid, name: name_from_auth(auth), avatar: avatar_from_auth(auth)}
+  end
+
+  defp name_from_auth(auth) do
+    if auth.info.name do
+      auth.info.name
+    else
+      name =
+        [auth.info.first_name, auth.info.last_name]
+        |> Enum.filter(&(&1 != nil and &1 != ""))
+
+      if Enum.empty?(name) do
+        auth.info.nickname
+      else
+        Enum.join(name, " ")
+      end
+    end
+  end
+end