From 3966cd004bdf77cf28f304cb954779533229c882 Mon Sep 17 00:00:00 2001
From: T Floyd Wright <tfwright@gmail.com>
Date: Fri, 26 Jan 2024 17:48:29 -0900
Subject: [PATCH] Add support for extra admin pages

---
 dev.exs                          | 15 +++++++++++++
 lib/live_admin/components/nav.ex | 36 ++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/dev.exs b/dev.exs
index 1d656f1..d74beb4 100644
--- a/dev.exs
+++ b/dev.exs
@@ -480,6 +480,20 @@ defmodule DemoWeb.PostsAdmin.Home do
   end
 end
 
+defmodule DemoWeb.Extra do
+  use Phoenix.LiveView
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <div class="flex h-full items-center justify-center">
+      <div class="w-1/2">
+        This is an extra page
+      </div>
+    </div>
+    """
+  end
+end
 
 defmodule DemoWeb.Router do
   use Phoenix.Router
@@ -499,6 +513,7 @@ defmodule DemoWeb.Router do
     live_admin "/admin", title: "DevAdmin" do
       admin_resource "/users/profiles", Demo.Accounts.User.Profile
       admin_resource "/users", DemoWeb.UserAdmin
+      live "/extra", DemoWeb.Extra, :index, as: :extra
     end
 
     live_admin "/posts-admin", components: [home: DemoWeb.PostsAdmin.Home] do
diff --git a/lib/live_admin/components/nav.ex b/lib/live_admin/components/nav.ex
index 915ea09..33460c5 100644
--- a/lib/live_admin/components/nav.ex
+++ b/lib/live_admin/components/nav.ex
@@ -5,6 +5,33 @@ defmodule LiveAdmin.Components.Nav do
   import LiveAdmin,
     only: [resource_title: 2, route_with_params: 2, trans: 1]
 
+  @impl true
+  def update(assigns, socket) do
+    base_path = assigns.base_path
+
+    extra_pages =
+      socket.router
+      |> Phoenix.Router.routes()
+      |> Enum.filter(fn r -> r.path == "/admin/extra" end)
+      |> Enum.filter(fn r ->
+        match?(
+          %{
+            metadata: %{
+              phoenix_live_view: {_, _, _, %{extra: %{session: {_, _, [^base_path, _]}}}}
+            }
+          },
+          r
+        )
+      end)
+
+    socket =
+      socket
+      |> assign(assigns)
+      |> assign(extra_pages: extra_pages)
+
+    {:ok, socket}
+  end
+
   @impl true
   def render(assigns) do
     nested_resources =
@@ -39,6 +66,15 @@ defmodule LiveAdmin.Components.Nav do
             config={@config}
           />
         </li>
+        <%= if Enum.any?(@extra_pages) do %>
+          <li class="nav__item--group">
+            <%= for route <- @extra_pages do %>
+              <.link navigate={route.path}>
+                <%= humanize(route.helper) %>
+              </.link>
+            <% end %>
+          </li>
+        <% end %>
         <li class="nav__item--group">
           <.link navigate={route_with_params(assigns, resource_path: "session")}>
             <%= trans("Session") %>