show forum list

lib/philomena_web/plugs/forum_list_plug.ex

@@ -0,0 +1,24 @@
+defmodule PhilomenaWeb.ForumListPlug do
+  alias Plug.Conn
+
+  alias Philomena.Forums.Forum
+  alias Philomena.Repo
+  alias Canada.Can
+  import Ecto.Query
+
+  def init(opts), do: opts
+
+  def call(conn, _opts) do
+    forums = lookup_visible_forums(conn.assigns.current_user)
+
+    conn
+    |> Conn.assign(:forums, forums)
+  end
+
+  # fixme: add caching!
+  defp lookup_visible_forums(user) do
+    Forum
+    |> Repo.all()
+    |> Enum.filter(&Can.can?(user, :show, &1))
+  end
+end

lib/philomena_web/router.ex

@@ -16,6 +16,7 @@ defmodule PhilomenaWeb.Router do
     plug PhilomenaWeb.CurrentBanPlug
     plug PhilomenaWeb.NotificationCountPlug
     plug PhilomenaWeb.SiteNoticePlug
+    plug PhilomenaWeb.ForumListPlug
     plug PhilomenaWeb.FilterSelectPlug
   end
 

lib/philomena_web/templates/layout/_header_navigation.html.slime

@@ -15,6 +15,10 @@
       span data-click-preventdefault="true"
         i.fa.fa-caret-down<
     .dropdown__content
+      = for forum <- @conn.assigns.forums do
+        a.header__link href=Routes.forum_path(@conn, :show, forum)
+          = forum.name
+
       a.header__link href='/posts'
         i.fa.fa-fw.fa-search>
         | Post Search