Adds initial google oauth integration setup

config/config.exs

@@ -33,5 +33,9 @@ config :ueberauth, Ueberauth,
     slack: { Ueberauth.Strategy.Slack, [
         default_scope: "bot,commands,users:read,team:read"
       ]
+    },
+    google: { Ueberauth.Strategy.Google, [
+        default_scope: "https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/analytics"
+      ]
     }
   ]

config/dev.secret.exs.sample

@@ -6,3 +6,7 @@ config :espi_dni, EspiDni.Plugs.RequireSlackToken,
 config :ueberauth, Ueberauth.Strategy.Slack.OAuth,
   client_id: "slack-client-id",
   client_secret: "slack-client-secret"
+
+config :ueberauth, Ueberauth.Strategy.Google.OAuth,
+  client_id: "google-client-id",
+  client_secret: "google-client-secret"

web/controllers/auth_controller.ex

@@ -20,7 +20,7 @@ defmodule EspiDni.AuthController do
     |> redirect(to: "/")
   end
 
-  def callback(%{assigns: %{ueberauth_auth: auth}} = conn, _params) do
+  def callback(%{assigns: %{ueberauth_auth: auth}} = conn, %{"provider" => "slack"} = _params) do
     case AuthHandler.init_from_auth(auth) do
       {:ok, team, user} ->
         conn
@@ -36,6 +36,11 @@ defmodule EspiDni.AuthController do
     end
   end
 
+  def callback(%{assigns: %{ueberauth_auth: auth}} = conn, %{"provider" => "google"} = _params) do
+    conn
+    |> put_flash(:info, "Successfully authenticated with google.")
+  end
+
   defp start_bot(conn) do
     team = get_session(conn, :current_team)
     EspiDni.BotSupervisor.start_bot(team.token)