fix(feed): complete Atom XML metadata

lib/pleroma/web/feed/feed_view.ex

@@ -43,7 +43,7 @@ defmodule Pleroma.Web.Feed.FeedView do
   def most_recent_update(activities, :rss) do
     activities
     |> Enum.map(fn activity ->
-      case Object.normalize(activity, fetch: false) do
+      case activity.object do
         %Object{updated_at: updated_at} -> updated_at
         _ -> activity.updated_at
       end

lib/pleroma/web/templates/feed/feed/_activity.atom.eex

@@ -1,7 +1,7 @@
 <entry>
   <activity:object-type>http://activitystrea.ms/schema/1.0/note</activity:object-type>
   <activity:verb>http://activitystrea.ms/schema/1.0/post</activity:verb>
-  <id><%= @data["id"] %></id>
+  <id><%= escape(@data["id"] || "") %></id>
   <title><%= activity_title(@data, Keyword.get(@feed_config, :post_title, %{})) %></title>
   <content type="html"><%= escape(atom_content_encoded(@data)) %></content>
   <published><%= to_rfc3339(@data["published"]) %></published>

lib/pleroma/web/templates/feed/feed/_tag_activity.atom.eex

@@ -4,7 +4,7 @@
 
     <%= render Phoenix.Controller.view_module(@conn), "_tag_author.atom", assigns %>
 
-  <id><%= @data["id"] %></id>
+  <id><%= escape(@data["id"] || "") %></id>
   <title><%= activity_title(@data, Keyword.get(@feed_config, :post_title, %{})) %></title>
   <content type="html"><%= escape(atom_content_encoded(@data)) %></content>
   <published><%= to_rfc3339(@data["published"]) %></published>

lib/pleroma/web/templates/feed/feed/tag.atom.eex

@@ -13,7 +13,7 @@
     <subtitle><%= subtitle %></subtitle>
   <% end %>
   <logo><%= feed_logo() %></logo>
-  <updated><%= most_recent_update(@activities) %></updated>
+  <updated><%= most_recent_update(@activities) || to_rfc3339(NaiveDateTime.utc_now()) %></updated>
   <link rel="self" href="<%= feed_self_url(@conn) %>" type="application/atom+xml"/>
 
   <%= for activity <- @activities do %>