add tag feeds

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

@@ -0,0 +1,15 @@
+<item>
+  <title><%= activity_title(@object, Keyword.get(@feed_config, :post_title, %{})) %></title>
+  
+  
+  <guid isPermalink="true"><%= activity_context(@activity) %></guid>
+  <link><%= activity_context(@activity) %></link>
+  <pubDate><%= pub_date(@data["published"]) %></pubDate>
+  
+  <description><%= activity_content(@object) %></description>
+  <%= for attachment <- @data["attachment"] || [] do %>
+    <enclosure url="<%= attachment_href(attachment) %>" type="<%= attachment_type(attachment) %>"/>
+  <% end %>
+  
+</item>
+

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

@@ -1,10 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<feed
-  xmlns="http://www.w3.org/2005/Atom"
-  xmlns:thr="http://purl.org/syndication/thread/1.0"
-  xmlns:activity="http://activitystrea.ms/spec/1.0/"
-  xmlns:poco="http://portablecontacts.net/spec/1.0"
-  xmlns:ostatus="http://ostatus.org/schema/1.0">
+<rss version="2.0" xmlns:webfeeds="http://webfeeds.org/rss/1.0">
+  <channel>
 
-  <title>TAGS</title>
-</feed>
+
+    <title>#<%= @tag %></title>
+    <description>These are public toots tagged with #<%= @tag %>. You can interact with them if you have an account anywhere in the fediverse.</description>
+    <link><%= '#{tag_feed_url(@conn, :feed, @tag)}.rss' %></link>
+    <webfeeds:logo><%= feed_logo() %></webfeeds:logo>
+    <webfeeds:accentColor>2b90d9</webfeeds:accentColor>
+    <%= for activity <- @activities do %>
+    <%= render @view_module, "_tag_activity.xml", Map.merge(assigns, prepare_activity(activity)) %>
+    <% end %>
+  </channel>
+</rss>