Show draft/scheduled status banners for authenticated users

app/lib/firehose_web/controllers/blog_controller.ex

@@ -22,11 +22,14 @@ defmodule FirehoseWeb.BlogController do
   def show(conn, %{"slug" => slug}) do
     blog = conn.assigns.blog
     post = blog.get_post!(slug)
+    visibility = Blogex.Post.visibility(post)
 
     render(conn, :show,
       page_title: post.title,
       post: post,
-      base_path: blog.base_path()
+      base_path: blog.base_path(),
+      visibility: visibility,
+      authenticated: conn.assigns[:current_user] != nil
     )
   end
 

app/lib/firehose_web/controllers/blog_html/show.html.heex

@@ -1,4 +1,23 @@
 <div class="space-y-8">
   <a href={@base_path} class="text-sm text-primary hover:underline">&larr; Back to posts</a>
+
+  <%= if @authenticated and @visibility == :draft do %>
+    <div
+      class="rounded-lg bg-amber-50 border border-amber-200 px-4 py-3 text-amber-800 text-sm font-medium"
+      id="post-status-banner"
+    >
+      Draft — not published
+    </div>
+  <% end %>
+
+  <%= if @authenticated and @visibility == :scheduled do %>
+    <div
+      class="rounded-lg bg-blue-50 border border-blue-200 px-4 py-3 text-blue-800 text-sm font-medium"
+      id="post-status-banner"
+    >
+      This post is scheduled for {Calendar.strftime(@post.date, "%B %d, %Y")}
+    </div>
+  <% end %>
+
   <.post_show post={@post} base_path={@base_path} />
 </div>

app/priv/blog/engineering/2099/01-01-future-test-post.md

@@ -0,0 +1,8 @@
+%{
+  title: "Future Test Post",
+  author: "Test Author",
+  tags: ~w(test),
+  description: "A post scheduled for the future"
+}
+---
+This is a future test post.

app/test/firehose_web/controllers/blog_controller_test.exs

@@ -0,0 +1,58 @@
+defmodule FirehoseWeb.BlogControllerTest do
+  use FirehoseWeb.ConnCase, async: false
+
+  describe "GET /blog/:blog_id/:slug - status banners" do
+    test "authenticated user sees draft banner on draft post", %{conn: conn} do
+      conn =
+        conn
+        |> init_test_session(%{})
+        |> assign(:current_user, %{id: 1})
+        |> get(~p"/blog/engineering/hello-world")
+
+      assert html_response(conn, 200) =~ "Draft"
+      assert conn.resp_body =~ "not published"
+    end
+
+    test "authenticated user sees scheduled banner on future post", %{conn: conn} do
+      conn =
+        conn
+        |> init_test_session(%{})
+        |> assign(:current_user, %{id: 1})
+        |> get(~p"/blog/engineering/future-test-post")
+
+      response = html_response(conn, 200)
+      assert response =~ "scheduled for"
+      assert response =~ "January 01, 2099"
+    end
+
+    test "authenticated user sees no banner on live post", %{conn: conn} do
+      conn =
+        conn
+        |> init_test_session(%{})
+        |> assign(:current_user, %{id: 1})
+        |> get(~p"/blog/engineering/why-firehose")
+
+      response = html_response(conn, 200)
+      refute response =~ "Draft"
+      refute response =~ "scheduled for"
+    end
+
+    test "unauthenticated user sees no banner on draft post", %{conn: conn} do
+      response =
+        conn
+        |> get(~p"/blog/engineering/hello-world")
+        |> html_response(200)
+
+      refute response =~ "post-status-banner"
+    end
+
+    test "unauthenticated user sees no banner on future post", %{conn: conn} do
+      response =
+        conn
+        |> get(~p"/blog/engineering/future-test-post")
+        |> html_response(200)
+
+      refute response =~ "post-status-banner"
+    end
+  end
+end