Got usernames working, for now, I think.

apps/bwc/lib/bwc.ex

@@ -11,12 +11,23 @@ defmodule Bwc do
 
   def create_player(attrs), do: Player.changeset(%Player{}, attrs) |> @repo.insert()
 
-  def delete_player(id), do: get_player(id) |> @repo.delete
+  def delete_player(nil), do: {:error, "Player does not exist"}
+  def delete_player(%Player{} = player), do: player |> @repo.delete
 
-  def list_players, do: @repo.all(Player)
+
+  def reset, do: Bwc.list_players |> Enum.each(fn(p) -> Bwc.delete_player(p) end)
+
+  def change_name({old_username, new_username}) do
+    {:ok, old_player} = old_username |> Bwc.get_or_create_player
+    old_player |> Player.changeset(%{username: new_username}) |> @repo.update()
+  end
+
+  def list_players, do: @repo.all(Player) |> Enum.filter(fn(p) -> p.username != "Nobody" end)
 
   def get_player(id), do: @repo.get!(Player, id)
 
+  def get_player_by_username(username), do: get_player_by(%{username: username})
+
   def get_player_by(params), do: @repo.get_by(Player, params)
 
   def get_or_create_player(username) do

apps/bwc_web/assets/js/bwc.js

@@ -7,7 +7,7 @@ window.UIkit = UIkit;
 window.show_login_box = () => {
 
     $("#top-bar-username a").hide();
-    $("#top-bar-login-box").show().focus();
+    $("#top-bar-login-box").val($("#top-bar-username a").text().trim()).show().focus();
 
 }
 
@@ -37,7 +37,7 @@ $("#top-bar-login-box").keyup(function(e) {
 
 window.login = () => {
     var CSRF_TOKEN = $("input[name=_csrf_token]").val();
-    var username = $("#top-bar-login-box").val();
+    var username = $("#top-bar-login-box").val().trim();
     $.ajax({
         url: "/api/join",
         method: 'POST',
@@ -45,13 +45,14 @@ window.login = () => {
             xhr.setRequestHeader("X-CSRF-Token", CSRF_TOKEN);
         },
         data: {
-            username: username
+            username: username,
+            old_username: $("#top-bar-username a").text().trim()
         }
     }).done(function(response) {
         console.log(response);
         UIkit.notification(response['data']);
         hide_login_box();        
-        $("#top-bar-username a").text(response['username']);
+        $("#top-bar-username a").text(response['username']);        
     });
 }
 

apps/bwc_web/lib/bwc_web/controllers/session_controller.ex

@@ -8,8 +8,9 @@ defmodule BwcWeb.SessionController do
 
   def set_name(conn, params) do
     import Logger
-
-    case Map.get(params, "username") |> Bwc.get_or_create_player() do
+    new_username = Map.get(params, "username")
+    old_username = Map.get(params, "old_username")
+    case {old_username, new_username} |> Bwc.change_name() do
       {:ok, player} ->
         conn |> put_session(:username, player.username) |> render("set_name.json", username: player.username)
 

apps/bwc_web/lib/bwc_web/roster.ex

@@ -4,14 +4,16 @@ defmodule BwcWeb.Roster do
   def init(opts), do: opts
 
   def call(conn, _opts) do
+    import Logger
+
     player =
       conn
       |> get_session(:username)
       |> case do
-        nil -> Bwc.new_player()
+        nil -> "Nobody"
         username -> Bwc.get_player_by(%{username: username})
       end
-
-    assign(conn, :player, player)
+    Logger.debug(player)
+    assign(conn, :current_player, player)
   end
 end

apps/bwc_web/lib/bwc_web/templates/layout/app.html.eex

@@ -25,7 +25,11 @@
             <div id="top-bar-username" class='uk-flex uk-flex-row uk-flex-center uk-margin-small-top'>
             <b>You are:&nbsp;</b>
             <a style='width:100px;' href="javascript:show_login_box()">
-            <%= @player.username %>
+            <%= if @current_player do %>
+            <%=show_username(@current_player)%>
+            <% else %>
+            Nobody
+            <% end %>
             </a>
             <input id="top-bar-login-box"/>
             </div>

apps/bwc_web/lib/bwc_web/templates/session/new.html.eex

@@ -5,6 +5,9 @@
 		<%= text_input f, :username, "placeholder": "Join the game as..." %>
 		<%= error_tag f, :username %>
     </div>
+    <div>
+    <%= text_input f, :picture, class: "uk-hidden" %>
+    </div>
     <div class="controls uk-margin-top">
         <div class="uk-flex uk-flex-center">
             <ul class="uk-subnav uk-subnav-pill" style="margin-bottom:0px;">

apps/bwc_web/lib/bwc_web/views/layout_view.ex

@@ -1,3 +1,25 @@
 defmodule BwcWeb.LayoutView do
   use BwcWeb, :view
+
+  def show_username(%Ecto.Changeset{} = player) do
+    cond do
+      player.valid? ->
+        player.username
+      true ->
+        Nobody
+      end
+  end
+
+  def show_username(%Bwc.Player{} = player) do
+    player.username
+  end
+
+  def show_username("Nobody" = player) do
+    "Nobody"
+  end
+
+  def show_username(nil = player) do
+    "Nobody"
+  end
+
 end