added rss feed for blog content

lib/home73k_web/controllers/feed_controller.ex

@@ -0,0 +1,15 @@
+defmodule Home73kWeb.FeedController do
+  use Home73kWeb, :controller
+
+  alias Home73k.Blog
+
+  def rss(conn, _params) do
+    posts = Blog.list_posts()
+    last_build_date = posts |> List.first() |> Map.get(:date)
+
+    conn
+    |> put_resp_content_type("application/rss+xml")
+    |> put_layout(:false)
+    |> render("rss.xml", posts: posts, last_build_date: last_build_date)
+  end
+end

lib/home73k_web/router.ex

@@ -10,6 +10,10 @@ defmodule Home73kWeb.Router do
     plug :put_secure_browser_headers
   end
 
+  pipeline :xml_rss do
+    plug :accepts, ["xml", "rss", "atom"]
+  end
+
   pipeline :api do
     plug :accepts, ["json"]
   end
@@ -30,6 +34,13 @@ defmodule Home73kWeb.Router do
     live "/blog/:id", BlogLive, :show
   end
 
+  scope "/feed", Home73kWeb do
+    pipe_through :xml_rss
+
+    # Feeds
+    get "/", FeedController, :rss
+  end
+
   # Other scopes may use custom stacks.
   # scope "/api", Home73kWeb do
   #   pipe_through :api

lib/home73k_web/templates/feed/rss.xml.eex

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <title>73k Blog - Adam Piontek</title>
+    <link><%= Routes.blog_url(@conn, :index) %></link>
+    <atom:link href="<%= Routes.feed_url(@conn, :rss) %>" rel="self" type="application/rss+xml" />
+    <description>Blog by Adam Piontek. Desktop Systems Engineer. Human. Casual anthropologist, cautious DIYer, cuckoo leftist, cat papa.</description>
+    <language>en</language>
+    <copyright>Copyright <%= DateTime.utc_now.year %> Adam Piontek</copyright>
+    <lastBuildDate><%= @last_build_date |> to_rfc822 %></lastBuildDate>
+    <category>Personal/Political/Society/Technology/IT/Internet/Web development</category>
+    <ttl>60</ttl><%= for post <- @posts do %>
+      <item>
+        <title><%= post.title %></title>
+        <link><%= Routes.blog_url(@conn, :show, post) %></link>
+        <guid><%= Routes.blog_url(@conn, :show, post) %></guid>
+        <description><![CDATA[ <%= post.lede %> ]]></description>
+        <category><%= post.tags |> List.first() %></category>
+        <pubDate><%= post.date |> to_rfc822 %></pubDate>
+        <source url="<%= Routes.feed_url(@conn, :rss) %>">73k Blog - Adam Piontek</source>
+      </item><% end %>
+  </channel>
+</rss>

lib/home73k_web/views/feed_view.ex

@@ -0,0 +1,11 @@
+defmodule Home73kWeb.FeedView do
+  use Home73kWeb, :view
+
+  import Home73k, only: [app_time_zone: 0]
+
+  def to_rfc822(naive_dt) do
+    naive_dt
+    |> DateTime.from_naive!(app_time_zone())
+    |> Calendar.strftime("%a, %d %b %Y %H:%M:%S %Z")
+  end
+end