Feature: OG Social media cards

Not Original Gangsta, but ObjectGraph

Reason: images were showing on LinkedIn, but small.

app/lib/firehose_web/controllers/blog_controller.ex

@@ -8,7 +8,11 @@ defmodule FirehoseWeb.BlogController do
     page = parse_page(params["page"])
     result = blog.paginate(page)
 
-    render(conn, :index,
+    meta = Blogex.SEO.meta_tags_for_blog(blog, FirehoseWeb.Endpoint.url())
+
+    conn
+    |> FirehoseWeb.Layouts.put_content_for(:meta_tags, meta)
+    |> render(:index,
       page_title: blog.title(),
       blog_title: blog.title(),
       blog_description: blog.description(),
@@ -24,9 +28,14 @@ defmodule FirehoseWeb.BlogController do
     post = blog.get_post!(slug)
     visibility = Blogex.Post.visibility(post)
 
-    render(conn, :show,
+    meta = Blogex.SEO.meta_tags(post, FirehoseWeb.Endpoint.url(), blog)
+
+    conn
+    |> FirehoseWeb.Layouts.put_content_for(:meta_tags, meta)
+    |> render(:show,
       page_title: post.title,
       post: post,
+      meta: meta,
       base_path: blog.base_path(),
       visibility: visibility,
       authenticated: !!(conn.assigns[:current_scope] && conn.assigns.current_scope.user)