user auth flow

lib/pointing_party/account.ex

@@ -0,0 +1,26 @@
+defmodule PointingParty.Account do
+  use Ecto.Schema
+  import Ecto.Changeset
+  alias PointingParty.Account
+
+  schema "accounts" do
+    field :username, :string
+  end
+
+  def create(attrs) do
+    changeset = changeset(%Account{}, attrs)
+    if changeset.valid? do
+      account = apply_changes(changeset)
+      {:ok, account}
+    else
+      {:error, %{changeset | action: :insert}}
+    end
+  end
+
+  @doc false
+  def changeset(account, attrs \\ %{}) do
+    account
+    |> cast(attrs, [:username])
+    |> validate_required([:username])
+  end
+end

lib/pointing_party/account/auth.ex

@@ -0,0 +1,6 @@
+defmodule PointingParty.Account.Auth do
+  alias PointingParty.Account
+  def login(params) do
+    Account.create(params)
+  end
+end

lib/pointing_party/card.ex

@@ -1,6 +1,8 @@
 defmodule PointingParty.Card do
   use Ecto.Schema
   import Ecto.Changeset
+  alias PointingParty.Repo
+  alias PointingParty.Card
 
   schema "cards" do
     field :description, :string
@@ -15,4 +17,8 @@ defmodule PointingParty.Card do
     |> cast(attrs, [:title, :description])
     |> validate_required([:title, :description])
   end
+
+  def get!(id) do
+    Repo.get!(Card, id)
+  end
 end

lib/pointing_party_web.ex

@@ -40,6 +40,7 @@ defmodule PointingPartyWeb do
       use Phoenix.HTML
 
       import PointingPartyWeb.ErrorHelpers
+      import PointingPartyWeb.LayoutHelpers
       import PointingPartyWeb.Gettext
       alias PointingPartyWeb.Router.Helpers, as: Routes
     end

lib/pointing_party_web/controllers/card_controller.ex

@@ -0,0 +1,10 @@
+defmodule PointingPartyWeb.CardController do
+  use PointingPartyWeb, :controller
+  alias PointingParty.Card
+
+  def index(conn, _params) do
+    # temporary, just to get something on the page for now
+    card = Card.get!(1)
+    render(conn, "index.html", card: card)
+  end
+end

lib/pointing_party_web/controllers/session_controller.ex

@@ -0,0 +1,25 @@
+defmodule PointingPartyWeb.SessionController do
+  use PointingPartyWeb, :controller
+  alias PointingParty.Account.Auth
+  alias PointingParty.Account
+
+  def new(conn, _params) do
+    changeset = Account.changeset(%Account{})
+    render(conn, "new.html", changeset: changeset)
+  end
+
+  def create(conn, params) do
+    case Auth.login(params["account"]) do
+      {:ok, %{username: username}} ->
+        put_session(conn, :username, username)
+        |> redirect(to: "/cards") |> halt()
+      {:error, changeset} ->
+        render(conn, "new.html", changeset: changeset)
+    end
+  end
+
+  def delete(conn, _params) do
+    clear_session(conn)
+    |> redirect(to: "/login") |> halt()
+  end
+end

lib/pointing_party_web/plugs/auth.ex

@@ -0,0 +1,17 @@
+defmodule PointingPartyWeb.Plugs.Auth do
+  import Plug.Conn
+  import Phoenix.Controller
+
+  def init(default), do: default
+
+  def call(conn, _default) do
+    case authenticate(conn) do
+      nil -> conn |> redirect(to: "/login") |> halt()
+      username -> assign(conn, :username, username)
+    end
+  end
+
+  defp authenticate(conn) do
+     get_session(conn, :username)
+  end
+end

lib/pointing_party_web/router.ex

@@ -15,10 +15,17 @@ defmodule PointingPartyWeb.Router do
 
   scope "/", PointingPartyWeb do
     pipe_through :browser
-
+    get "/login", SessionController, :new
+    post "/login", SessionController, :create
+    delete "/logout", SessionController, :delete
     get "/", PageController, :index
   end
 
+  scope "/", PointingPartyWeb do
+    pipe_through [:browser, PointingPartyWeb.Plugs.Auth]
+    get "/cards", CardController, :index
+  end
+
   # Other scopes may use custom stacks.
   # scope "/api", PointingPartyWeb do
   #   pipe_through :api

lib/pointing_party_web/templates/card/index.html.eex

@@ -0,0 +1 @@
+<%= @card.title %>

lib/pointing_party_web/templates/layout/app.html.eex

@@ -4,19 +4,24 @@
     <meta charset="utf-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
-    <title>PointingParty · Phoenix Framework</title>
+    <title>PointingParty</title>
     <link rel="stylesheet" href="<%= Routes.static_path(@conn, "/css/app.css") %>"/>
   </head>
   <body>
     <header>
       <section class="container">
         <nav role="navigation">
           <ul>
-            <li><a href="https://hexdocs.pm/phoenix/overview.html">Get Started</a></li>
+            <%= if signed_in?(@conn) do %>
+              <li>Hi, <%= @conn.assigns.username %></li>
+              <li><%= link "Log Out", to: Routes.session_path(@conn, :delete), method: :delete, class: "nav-link" %></li>
+            <%= else %>
+              <li><%= link "Log In", to: Routes.session_path(@conn, :new), class: "nav-link" %></li>
+            <%= end %>
           </ul>
         </nav>
-        <a href="http://phoenixframework.org/" class="phx-logo">
-          <img src="<%= Routes.static_path(@conn, "/images/phoenix.png") %>" alt="Phoenix Framework Logo"/>
+        <a href="/" class="phx-logo">
+          <img src="<%= Routes.static_path(@conn, "/images/pp-logo.png") %>" alt="Phoenix Framework Logo"/>
         </a>
       </section>
     </header>

lib/pointing_party_web/templates/page/index.html.eex

@@ -1,35 +1,4 @@
 <section class="phx-hero">
-  <h1><%= gettext "Welcome to %{name}!", name: "Phoenix" %></h1>
-  <p>A productive web framework that<br/>does not compromise speed or maintainability.</p>
-</section>
-
-<section class="row">
-  <article class="column">
-    <h2>Resources</h2>
-    <ul>
-      <li>
-        <a href="https://hexdocs.pm/phoenix/overview.html">Guides &amp; Docs</a>
-      </li>
-      <li>
-        <a href="https://github.com/phoenixframework/phoenix">Source</a>
-      </li>
-      <li>
-        <a href="https://github.com/phoenixframework/phoenix/blob/v1.4/CHANGELOG.md">v1.4 Changelog</a>
-      </li>
-    </ul>
-  </article>
-  <article class="column">
-    <h2>Help</h2>
-    <ul>
-      <li>
-        <a href="https://elixirforum.com/c/phoenix-forum">Forum</a>
-      </li>
-      <li>
-        <a href="https://webchat.freenode.net/?channels=elixir-lang">#elixir-lang on Freenode IRC</a>
-      </li>
-      <li>
-        <a href="https://twitter.com/elixirphoenix">Twitter @elixirphoenix</a>
-      </li>
-    </ul>
-  </article>
+  <h1>Welcome to Pointing Party!</h1>
+  <p>A ticket estimation tool backed by the awesome real-time power of Phoenix.</p>
 </section>

lib/pointing_party_web/templates/session/new.html.eex

@@ -0,0 +1,9 @@
+<h1>Sign In</h1>
+<%= form_for @changeset, Routes.session_path(@conn, :create), fn f -> %>
+  <label>
+    Username: <%= text_input f, :username %>
+  </label>
+  <%=  error_tag f, :username %>  
+
+  <%= submit "Sign In" %>
+<% end %>

lib/pointing_party_web/views/card_view.ex

@@ -0,0 +1,3 @@
+defmodule PointingPartyWeb.CardView do
+  use PointingPartyWeb, :view
+end

lib/pointing_party_web/views/layout_helpers.ex

@@ -0,0 +1,10 @@
+defmodule PointingPartyWeb.LayoutHelpers do
+  use Phoenix.HTML
+
+  @doc """
+  Generates tag for inlined form input errors.
+  """
+  def signed_in?(conn) do
+    not is_nil(conn.assigns[:username])
+  end
+end

lib/pointing_party_web/views/session_view.ex

@@ -0,0 +1,3 @@
+defmodule PointingPartyWeb.SessionView do
+  use PointingPartyWeb, :view
+end