Minor tweaks to importing first posts

app/assets/javascripts/discourse/templates/post.js.handlebars

@@ -76,9 +76,9 @@
         <div class='cooked'>{{{cooked}}}</div>
         {{#if view.showExpandButton}}
           {{#if controller.loadingExpanded}}
-            <button class="btn" disabled>{{i18n loading}}</button>
+            <button class="btn expand-post" disabled>{{i18n loading}}</button>
           {{else}}
-            <button {{action expandFirstPost this}} class='btn'>{{i18n post.show_full}}</button>
+            <button {{action expandFirstPost this}} class='btn expand-post'>{{i18n post.show_full}}</button>
           {{/if}}
         {{/if}}
         {{view Discourse.PostMenuView postBinding="this" postViewBinding="view"}}

app/assets/stylesheets/desktop/topic-post.scss

@@ -413,6 +413,9 @@ span.post-count {
   opacity: .8;
 }
 
+button.expand-post {
+  margin-top: 10px;
+}
 
 #topic-footer-buttons {
   .btn {

app/controllers/posts_controller.rb

@@ -147,8 +147,9 @@ class PostsController < ApplicationController
     post = find_post_from_params
     content = Rails.cache.fetch("embed-topic:#{post.topic_id}", expires_in: 10.minutes) do
       url = TopicEmbed.where(topic_id: post.topic_id).pluck(:embed_url).first
-      doc = TopicEmbed.find_remote(url)
-      doc.content
+      title, body = TopicEmbed.find_remote(url)
+      body << TopicEmbed.imported_from_html(url)
+      body
     end
     render json: {cooked: content}
   rescue

app/models/topic_embed.rb

@@ -10,6 +10,10 @@ class TopicEmbed < ActiveRecord::Base
     url.downcase.sub(/\/$/, '').sub(/\-+/, '-')
   end
 
+  def self.imported_from_html(url)
+    "\n<hr>\n<small>#{I18n.t('embed.imported_from', link: "<a href='#{url}'>#{url}</a>")}</small>\n"
+  end
+
   # Import an article from a source (RSS/Atom/Other)
   def self.import(user, url, title, contents)
     return unless url =~ /^https?\:\/\//
@@ -17,7 +21,7 @@ class TopicEmbed < ActiveRecord::Base
     if SiteSetting.embed_truncate
       contents = first_paragraph_from(contents)
     end
-    contents << "\n<hr>\n<small>#{I18n.t('embed.imported_from', link: "<a href='#{url}'>#{url}</a>")}</small>\n"
+    contents << imported_from_html(url)
 
     url = normalize_url(url)
 
@@ -60,15 +64,35 @@ class TopicEmbed < ActiveRecord::Base
     require 'ruby-readability'
 
     url = normalize_url(url)
-    Readability::Document.new(open(url).read,
-                                        tags: %w[div p code pre h1 h2 h3 b em i strong a img ul li ol],
-                                        attributes: %w[href src])
+    original_uri = URI.parse(url)
+    doc = Readability::Document.new(open(url).read,
+                                        tags: %w[div p code pre h1 h2 h3 b em i strong a img ul li ol blockquote],
+                                        attributes: %w[href src],
+                                        remove_empty_nodes: false)
+
+    tags = {'img' => 'src', 'script' => 'src', 'a' => 'href'}
+    title = doc.title
+    doc = Nokogiri::HTML(doc.content)
+    doc.search(tags.keys.join(',')).each do |node|
+      url_param = tags[node.name]
+      src = node[url_param]
+      unless (src.empty?)
+        uri = URI.parse(src)
+        unless uri.host
+          uri.scheme = original_uri.scheme
+          uri.host = original_uri.host
+          node[url_param] = uri.to_s
+        end
+      end
+    end
+
+    [title, doc.to_html]
   end
 
   def self.import_remote(user, url, opts=nil)
     opts = opts || {}
-    doc = find_remote(url)
-    TopicEmbed.import(user, url, opts[:title] || doc.title, doc.content)
+    title, body = find_remote(url)
+    TopicEmbed.import(user, url, opts[:title] || title, body)
   end
 
   # Convert any relative URLs to absolute. RSS is annoying for this.