Added user identification

storing a UUID for each new user in the socket

mix.exs

@@ -38,6 +38,7 @@ defmodule Grains.Mixfile do
      {:phoenix_live_reload, "~> 1.0", only: :dev},
      {:gettext, "~> 0.11"},
      {:cowboy, "~> 1.0"},
+     { :uuid, "~> 1.1" },
      {:logger_file_backend, "~> 0.0.8"},
      {:distillery, "~>1.2.2"}]
   end

mix.lock

@@ -26,4 +26,5 @@
   "postgrex": {:hex, :postgrex, "0.13.2", "2b88168fc6a5456a27bfb54ccf0ba4025d274841a7a3af5e5deb1b755d95154e", [:mix], [{:connection, "~> 1.0", [hex: :connection, optional: false]}, {:db_connection, "~> 1.1", [hex: :db_connection, optional: false]}, {:decimal, "~> 1.0", [hex: :decimal, optional: false]}]},
   "providers": {:hex, :providers, "1.4.1", "e74176b29d4771544410af5022fe1306b100d0f57c9e0f3656bcff5962f87cd2", [:rebar], [{:getopt, "0.8.2", [hex: :getopt, optional: false]}]},
   "ranch": {:hex, :ranch, "1.3.2", "e4965a144dc9fbe70e5c077c65e73c57165416a901bd02ea899cfd95aa890986", [:rebar3], []},
-  "relx": {:hex, :relx, "3.1.0", "71b7e00e83543c92512d785a268db78a970fe5d811171329623784daca7d23dc", [:rebar], [{:bbmustache, "1.0.1", [hex: :bbmustache, optional: false]}, {:erlware_commons, "0.13.0", [hex: :erlware_commons, optional: false]}, {:getopt, "0.8.2", [hex: :getopt, optional: false]}, {:providers, "1.4.1", [hex: :providers, optional: false]}]}}
+  "relx": {:hex, :relx, "3.1.0", "71b7e00e83543c92512d785a268db78a970fe5d811171329623784daca7d23dc", [:rebar], [{:bbmustache, "1.0.1", [hex: :bbmustache, optional: false]}, {:erlware_commons, "0.13.0", [hex: :erlware_commons, optional: false]}, {:getopt, "0.8.2", [hex: :getopt, optional: false]}, {:providers, "1.4.1", [hex: :providers, optional: false]}]},
+  "uuid": {:hex, :uuid, "1.1.7", "007afd58273bc0bc7f849c3bdc763e2f8124e83b957e515368c498b641f7ab69", [:mix], []}}

web/channels/slider_channel.ex

@@ -12,7 +12,7 @@ defmodule Grains.SliderChannel do
   end
 
   def handle_in("slider", params, socket) do
-
+    IO.puts socket.assigns.user_uuid
     IO.puts "slider: #{params["slider"]} : #{params["value"]}"
     slider = params["slider"]
     value = params["value"]

web/channels/user_socket.ex

@@ -21,10 +21,24 @@ defmodule Grains.UserSocket do
   #
   # See `Phoenix.Token` documentation for examples in
   # performing token verification on connect.
-  def connect(_params, socket) do
-    {:ok, socket}
+
+  @max_age 2 * 7 * 24 * 60 * 60
+
+  def connect(%{"token" => token}, socket) do
+    case Phoenix.Token.verify(socket, "user socket", token, max_age: @max_age) do
+      {:ok, uuid} ->
+        IO.puts "verified : #{uuid}"
+        {:ok, assign(socket, :user_uuid, uuid) }
+      {:error, _reason} ->
+        IO.puts "error: #{_reason}"
+        :error
+    end
   end
 
+  def connect(_params, _socket), do: :error
+
+  def id(socket), do: "users_sockets:#{socket.assigns.user_uuid}"
+
   # Socket id's are topics that allow you to identify all sockets for a given user:
   #
   #     def id(socket), do: "users_socket:#{socket.assigns.user_id}"
@@ -35,5 +49,4 @@ defmodule Grains.UserSocket do
   #     Grains.Endpoint.broadcast("users_socket:#{user.id}", "disconnect", %{})
   #
   # Returning `nil` makes this socket anonymous.
-  def id(_socket), do: nil
 end

web/controllers/grains_controller.ex

+defmodule Grains.GrainsController do
+  use Grains.Web, :controller
+
+  def show(conn, %{"grain" => grain}) do
+    render conn, "show.html", grain: grain
+  end
+
+end

web/controllers/token.ex

+defmodule Grains.Token do
+  import Plug.Conn
+
+  def init(opts) do
+    opts
+  end
+
+  def call(conn, _opts) do
+    uuid = get_session(conn, :user_uuid) || UUID.uuid1()
+    token = Phoenix.Token.sign(conn, "user socket", uuid )
+
+    conn
+    |> assign(:user_token, token)
+    |> put_session(:user_uuid, uuid)
+    |> configure_session(renew: true)
+
+  end
+end

web/router.ex

@@ -7,6 +7,7 @@ defmodule Grains.Router do
     plug :fetch_flash
     plug :protect_from_forgery
     plug :put_secure_browser_headers
+    plug Grains.Token
   end
 
   pipeline :api do
@@ -16,6 +17,7 @@ defmodule Grains.Router do
   scope "/", Grains do
     pipe_through :browser # Use the default browser stack
 
+    get "/grains/:grain", GrainsController, :show
     get "/", PageController, :index
   end
 

web/templates/grains/show.html.eex

+<h1>Grain <%= @grain %></h1>
+
+
+<div id="#sliderPanel" class="interfacePanel"></div>

web/templates/layout/app.html.eex

@@ -14,12 +14,7 @@
   <body>
     <div class="container">
       <header class="header">
-        <nav role="navigation">
-          <ul class="nav nav-pills pull-right">
-            <li><a href="http://www.phoenixframework.org/docs">Get Started</a></li>
-          </ul>
-        </nav>
-        <span class="logo"></span>
+        <h1>Welcome to Grains</h1>
       </header>
 
       <p class="alert alert-info" role="alert"><%= get_flash(@conn, :info) %></p>
@@ -30,6 +25,7 @@
       </main>
 
     </div> <!-- /container -->
+    <script>window.userToken = "<%= assigns[:user_token] %>"</script>
     <script src="<%= static_path(@conn, "/js/app.js") %>"></script>
   </body>
 </html>

web/templates/page/index.html.eex

@@ -4,4 +4,16 @@
     the mobile web and the cloud.</p>
 </div>
 
-<div id="#sliderPanel" class="interfacePanel"></div>
+<div>
+  Choose your sound:
+  <ul>
+    <li>
+      <a href="/grains/rhythm">Rhythm</a>
+    </li>
+    <li><a href="/grains/bass">Bass</a></li>
+    <li><a href="/grains/chords">Chords</a></li>
+    <li><a href="/grains/melody">Melody</a></li>
+    </li>
+  </ul>
+
+</div>

web/views/grains_view.ex

+defmodule Grains.GrainsView do
+  use Grains.Web, :view
+end