Add tag page for posts.

lib/jol_web/controllers/tag_controller.ex

@@ -3,7 +3,16 @@ defmodule JOLWeb.TagController do
 
   def index(conn, _params) do
     conn
-    |> assign(:page_title, "Jess Uses These Tags")
-    |> render(:index)
+    |> render(:index,
+      page_title: "Jess Uses These Tags",
+      tags: JOL.Blog.unique_tag_list)
+  end
+
+  def tag(conn, %{"tag" => tag}) do
+    conn
+    |> render(:tag,
+      tag: tag,
+      page_title: "Posts Filed Under #{tag}",
+      posts: JOL.Blog.get_posts_by_tag!(tag))
   end
 end

lib/jol_web/controllers/tag_html.ex

@@ -0,0 +1,5 @@
+defmodule JOLWeb.TagHTML do
+  use JOLWeb, :html
+
+  embed_templates "tag_html/*"
+end

lib/jol_web/controllers/tag_html/tag.html.heex

@@ -0,0 +1,9 @@
+<h1 class="post-title">Filed Under "<%= @tag %>"</h1>
+
+<%= for post <- @posts do %>
+    <div class="post-summary">
+        <p class="post-date"><date><%= post.date %></date></p>
+        <h3> <.link href={~p"/blog/#{post.slug}"}><%= post.title %> </.link> </h3>
+        <p><%= raw post.lede %></p>
+    </div>
+<% end %>

lib/jol_web/router.ex

@@ -22,11 +22,13 @@ defmodule JOLWeb.Router do
     pipe_through :browser
 
     get "/", PageController, :home
-    get "/tags", TagController, :index
     get "/archive", PageController, :archive
     get "/about", PageController, :about
     get "/now", PageController, :now
 
+    get "/tags", TagController, :index
+    get "/tags/:tag", TagController, :tag
+
     get "/blog", BlogController, :index
     get "/blog/:slug", BlogController, :show
   end