Switch to using ATOM for changeset feeds.

app/views/changeset/list.atom.builder

@@ -0,0 +1,53 @@
+atom_feed(:language => I18n.locale, :schema_date => 2009,
+          :id => url_for(params.merge({ :only_path => false })),
+          :root_url => url_for(params.merge({ :only_path => false, :format => nil })),
+          "xmlns:georss" => "http://www.georss.org/georss") do |feed|
+  feed.title @title
+  feed.subtitle @description
+  feed.updated @edits.map {|e|  [e.created_at, e.closed_at].max }.max
+  feed.icon "http://#{SERVER_URL}/favicon.ico"
+  feed.logo "http://#{SERVER_URL}/images/mag_map-rss2.0.png"
+
+  feed.rights :type => 'xhtml' do |xhtml|
+    xhtml.a :href => "http://creativecommons.org/licenses/by-sa/2.0/" do |a|
+      a.img :src => "http://#{SERVER_URL}/images/cc_button.png", :alt => "CC by-sa 2.0"
+    end
+  end
+
+  for changeset in @edits
+    feed.entry(changeset, :updated => changeset.closed_at, :id => changeset_url(changeset.id, :only_path => false)) do |entry|
+      entry.link :rel => "alternate",
+                 :href => changeset_read_url(changeset, :only_path => false),
+                 :type => "application/osm+xml"
+      entry.link :rel => "alternate",
+                 :href => changeset_download_url(changeset, :only_path => false),
+                 :type => "application/osmChange+xml"
+
+      entry.title t('browse.changeset.title') + " " + h(changeset.id)
+
+      if changeset.user.data_public?
+        entry.author do |author|
+          author.name changeset.user.display_name
+          author.uri url_for(:controller => 'user', :action => 'view', :display_name => changeset.user.display_name, :only_path => false)
+        end
+      end
+
+      if changeset.tags['comment']
+        feed.content changeset.tags['comment']
+      end
+
+      unless changeset.min_lat.nil?
+        minlon = changeset.min_lon/GeoRecord::SCALE.to_f
+        minlat = changeset.min_lat/GeoRecord::SCALE.to_f
+        maxlon = changeset.max_lon/GeoRecord::SCALE.to_f
+        maxlat = changeset.max_lat/GeoRecord::SCALE.to_f
+
+        # See http://georss.org/Encodings#Geometry
+        lower_corner = "#{minlat} #{minlon}"
+        upper_corner = "#{maxlat} #{maxlon}"
+
+        feed.georss :box, lower_corner + " " + upper_corner
+      end
+    end
+  end
+end