Add authentication for web UI

lib/frenzy/update_feeds.ex

@@ -32,9 +32,9 @@ defmodule Frenzy.UpdateFeeds do
 
   defp schedule_update() do
     # 15 minutes
-    # Process.send_after(self(), :update_feeds, 15 * 60 * 1000)
+    Process.send_after(self(), :update_feeds, 15 * 60 * 1000)
     # 1 minutes
-    Process.send_after(self(), :update_feeds, 60 * 1000)
+    # Process.send_after(self(), :update_feeds, 60 * 1000)
   end
 
   defp update_feeds() do

lib/frenzy_web/controllers/feed_controller.ex

@@ -5,8 +5,28 @@ defmodule FrenzyWeb.FeedController do
   alias FrenzyWeb.Endpoint
   import Ecto.Query
 
+  plug :user_owns_feed
+
+  defp user_owns_feed(%Plug.Conn{path_params: %{"id" => id}} = conn, _opts) do
+    user = conn.assigns[:user]
+
+    feed = Repo.get(Feed, id)
+
+    if Enum.any?(user.groups, fn g -> g.id == feed.group_id end) do
+      conn
+      |> assign(:feed, feed)
+    else
+      conn
+      |> put_flash(:error, "You do not have permission to access that resource.")
+      |> redirect(to: Routes.group_path(Endpoint, :index))
+      |> halt()
+    end
+  end
+
+  defp user_owns_feed(conn, _opts), do: conn
+
   def show(conn, %{"id" => id}) do
-    feed = Repo.get(Feed, id) |> Repo.preload(:filter)
+    feed = conn.assigns[:feed]
     items = Repo.all(from Item, where: [feed_id: ^id, tombstone: false], order_by: [desc: :date])
 
     render(conn, "show.html", %{
@@ -32,28 +52,28 @@ defmodule FrenzyWeb.FeedController do
     redirect(conn, to: Routes.group_path(Endpoint, :show, group_id))
   end
 
-  def delete(conn, %{"id" => id}) do
-    feed = Repo.get(Feed, id)
+  def delete(conn, _params) do
+    feed = conn.assigns[:feed]
     {:ok, _} = Repo.delete(feed)
     redirect(conn, to: Routes.group_path(Endpoint, :show, feed.group_id))
   end
 
-  def enable_filter(conn, %{"id" => id}) do
-    feed = Repo.get(Feed, id) |> Repo.preload(:filter)
+  def enable_filter(conn, _params) do
+    feed = conn.assigns[:feed] |> Repo.preload(:filter)
     changeset = Feed.changeset(feed, %{filter_enabled: true})
     Repo.update(changeset)
-    redirect(conn, to: Routes.feed_path(Endpoint, :show, id))
+    redirect(conn, to: Routes.feed_path(Endpoint, :show, feed.id))
   end
 
-  def disable_filter(conn, %{"id" => id}) do
-    feed = Repo.get(Feed, id) |> Repo.preload(:filter)
+  def disable_filter(conn, _params) do
+    feed = conn.assigns[:feed] |> Repo.preload(:filter)
     changeset = Feed.changeset(feed, %{filter_enabled: false})
     Repo.update(changeset)
-    redirect(conn, to: Routes.feed_path(Endpoint, :show, id))
+    redirect(conn, to: Routes.feed_path(Endpoint, :show, feed.id))
   end
 
-  def refresh(conn, %{"id" => id}) do
-    feed = Repo.get(Feed, id) |> Repo.preload(:filter)
+  def refresh(conn, _params) do
+    feed = conn.assgins[:feed] |> Repo.preload(:filter)
     feed = Frenzy.UpdateFeeds.refresh(Frenzy.UpdateFeeds, feed)
     redirect(conn, to: Routes.feed_path(Endpoint, :show, feed.id))
   end

lib/frenzy_web/controllers/group_controller.ex

@@ -3,20 +3,39 @@ defmodule FrenzyWeb.GroupController do
   alias Frenzy.{Repo, Group, Feed}
   alias FrenzyWeb.Router.Helpers, as: Routes
   alias FrenzyWeb.Endpoint
-  import Ecto.Query
+
+  plug :user_owns_group
+
+  defp user_owns_group(%Plug.Conn{path_params: %{"id" => id}} = conn, _opts) do
+    user = conn.assigns[:user]
+
+    group = Repo.get(Group, id)
+
+    if Enum.any?(user.groups, fn g -> g.id == group.id end) do
+      conn
+      |> assign(:group, group)
+    else
+      conn
+      |> put_flash(:error, "You do not have permission to acess that resource.")
+      |> redirect(to: Routes.group_path(Endpoint, :index))
+      |> halt()
+    end
+  end
+
+  defp user_owns_group(conn, _opts), do: conn
 
   def index(conn, _params) do
-    groups = Repo.all(from group in Group, preload: [:feeds])
+    groups = conn.assigns[:user].groups
     render(conn, "index.html", groups: groups)
   end
 
-  def show(conn, %{"id" => id}) do
-    group = Repo.get(Group, id) |> Repo.preload(:feeds)
+  def show(conn, _params) do
+    group = conn.assigns[:group] |> Repo.preload(:feeds)
 
     create_feed_changeset =
       Feed.changeset(
         %Feed{
-          group_id: id
+          group_id: group.id
         },
         %{}
       )
@@ -34,15 +53,21 @@ defmodule FrenzyWeb.GroupController do
   end
 
   def create(conn, %{"group" => %{"title" => title}}) do
-    changeset = Group.changeset(%Group{title: title}, %{})
+    user = conn.assigns[:user]
+
+    changeset =
+      Ecto.build_assoc(user, :groups, %{
+        title: title
+      })
 
     {:ok, group} = Repo.insert(changeset)
 
-    redirect(conn, to: Routes.group_path(Endpoint, :index))
+    redirect(conn, to: Routes.group_path(Endpoint, :show, group.id))
   end
 
-  def delete(conn, %{"id" => id}) do
-    group = Repo.get(Group, id)
+  def delete(conn, _params) do
+    group = conn.assigns[:group]
+
     {:ok, _} = Repo.delete(group)
     redirect(conn, to: Routes.group_path(Endpoint, :index))
   end

lib/frenzy_web/controllers/item_controller.ex

@@ -4,33 +4,60 @@ defmodule FrenzyWeb.ItemController do
   alias FrenzyWeb.Router.Helpers, as: Routes
   alias FrenzyWeb.Endpoint
 
-  def show(conn, %{"id" => id}) do
+  plug :user_owns_item
+
+  defp user_owns_item(%Plug.Conn{path_params: %{"id" => id}} = conn, _opts) do
+    user = conn.assigns[:user]
+
     item = Repo.get(Item, id)
-    feed = Repo.get(Feed, item.feed_id)
+
+    feeds = Enum.flat_map(user.groups, fn g -> g.feeds end)
+
+    if Enum.any?(feeds, fn f -> f.id == item.feed_id end) do
+      conn
+      |> assign(:item, item)
+    else
+      conn
+      |> put_flash(:error, "You do not have permission to access that resource.")
+      |> redirect(to: Routes.group_path(Endpoint, :index))
+      |> halt()
+    end
+  end
+
+  defp user_owns_item(conn, _opts), do: conn
+
+  def show(conn, _params) do
+    item = conn.assigns[:item] |> Repo.preload(:feed)
+
     render(conn, "show.html", %{
       item: item,
-      feed: feed
+      feed: item.feed
     })
   end
 
-  def read(conn, %{"id" => id}) do
-    item = Repo.get(Item, id) |> Repo.preload(:feed)
-    changeset = Item.changeset(item, %{
+  def read(conn, _params) do
+    item = conn.assigns[:item] |> Repo.preload(:feed)
+
+    changeset =
+      Item.changeset(item, %{
         read: true,
-      read_date: Timex.now
+        read_date: Timex.now()
       })
+
     Repo.update(changeset)
-    redirect(conn, to: Routes.item_path(Endpoint, :show, id))
+    redirect(conn, to: Routes.item_path(Endpoint, :show, item.id))
   end
 
-  def unread(conn, %{"id" => id}) do
-    item = Repo.get(Item, id) |> Repo.preload(:feed)
-    changeset = Item.changeset(item, %{
+  def unread(conn, _params) do
+    item = conn.assigns[:item] |> Repo.preload(:feed)
+
+    changeset =
+      Item.changeset(item, %{
         read: false,
         read_date: nil
       })
-    Repo.update(changeset)
-    redirect(conn, to: Routes.item_path(Endpoint, :show, id))
-  end
 
+    Repo.update(changeset)
+    redirect(conn, to: Routes.item_path(Endpoint, :show, item.id))
+  end
 end

lib/frenzy_web/controllers/login_controller.ex

@@ -0,0 +1,31 @@
+defmodule FrenzyWeb.LoginController do
+  use FrenzyWeb, :controller
+  alias Frenzy.{Repo, User}
+  alias FrenzyWeb.Router.Helpers, as: Routes
+  alias FrenzyWeb.Endpoint
+  import Ecto.Query
+
+  def login(conn, _params) do
+    render(conn, "login.html")
+  end
+
+  @error_message "Invalid username or password"
+
+  def login_post(conn, %{"username" => username, "password" => password}) do
+    user = Repo.get_by(User, username: username)
+
+    case Bcrypt.check_pass(user, password) do
+      {:ok, user} ->
+        user_token = Phoenix.Token.sign(Endpoint, "user token", user.id)
+
+        conn
+        |> put_session(:user_token, user_token)
+        |> redirect(to: Routes.group_path(Endpoint, :index))
+
+      {:error, _reason} ->
+        conn
+        |> put_flash(:error, @error_message)
+        |> redirect(to: Routes.login_path(Endpoint, :login))
+    end
+  end
+end

lib/frenzy_web/plug/authenticate.ex

@@ -0,0 +1,31 @@
+defmodule FrenzyWeb.Plug.Authenticate do
+  import Plug.Conn
+  alias Frenzy.{Repo, User}
+  alias FrenzyWeb.Router.Helpers, as: Routes
+  alias FrenzyWeb.Endpoint
+
+  def init(opts), do: opts
+
+  def call(conn, _opts) do
+    user_token = get_session(conn, :user_token)
+
+    case Phoenix.Token.verify(Endpoint, "user token", user_token, max_age: 24 * 60 * 60) do
+      {:error, _reason} ->
+        conn
+        |> Phoenix.Controller.redirect(to: Routes.login_path(Endpoint, :login))
+        |> halt()
+
+      {:ok, user_id} ->
+        case Repo.get(User, user_id) do
+          nil ->
+            conn
+            |> Phoenix.Controller.redirect(to: Routes.login_path(Endpoint, :login))
+            |> halt()
+
+          user ->
+            user = Repo.preload(user, groups: [:feeds])
+            assign(conn, :user, user)
+        end
+    end
+  end
+end

lib/frenzy_web/router.ex

@@ -7,7 +7,15 @@ defmodule FrenzyWeb.Router do
     plug :fetch_flash
     plug :protect_from_forgery
     plug :put_secure_browser_headers
-    plug BasicAuth, use_config: {:frenzy, :auth}
+  end
+
+  pipeline :authenticate do
+    # plug :accepts, ["html"]
+    # plug :fetch_session
+    # plug :fetch_flash
+    # plug :protect_from_forgery
+    # plug :put_secure_browser_headers
+    plug FrenzyWeb.Plug.Authenticate
   end
 
   pipeline :api do
@@ -17,6 +25,14 @@ defmodule FrenzyWeb.Router do
   scope "/", FrenzyWeb do
     pipe_through :browser
 
+    get "/login", LoginController, :login
+    post "/login", LoginController, :login_post
+  end
+
+  scope "/", FrenzyWeb do
+    pipe_through :browser
+    pipe_through :authenticate
+
     get "/", GroupController, :index
     resources "/groups", GroupController, except: [:edit, :update]
 

lib/frenzy_web/templates/login/login.html.eex

@@ -0,0 +1,15 @@
+<% IO.inspect(get_flash(@conn, :error)) %>
+
+<%= form_tag Routes.login_path(@conn, :login_post), method: :post do %>
+  <div class="form-group">
+    <label for="username">Username</label>
+    <input type="text" name="username" id="username">
+  </div>
+  <div class="form-group">
+    <label for="password">Password</label>
+    <input type="password" name="password" id="password">
+  </div>
+  <div class="form-group">
+    <%= submit "Log In" %>
+  </div>
+<% end %>

lib/frenzy_web/views/login_view.ex

@@ -0,0 +1,3 @@
+defmodule FrenzyWeb.LoginView do
+  use FrenzyWeb, :view
+end

mix.exs

@@ -47,7 +47,6 @@ defmodule Frenzy.MixProject do
       {:fiet, git: "https://github.com/shadowfacts/fiet.git", branch: "master"},
       {:timex, "~> 3.0"},
       {:readability, git: "https://github.com/shadowfacts/readability.git", branch: "master"},
-      {:basic_auth, "~> 2.2.2"},
       {:bcrypt_elixir, "~> 2.0"}
     ]
   end