Applied a variation of the patch submitted with #367 by a nameless contrbutor (thanks, whoever you are!). This should bring our iCal feeds more in line with the spec (RFC 2445) and make them work better with Evolution and perhaps other iCal consumers.

git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@315 a4c988fc-2ded-0310-b66e-134b36920a42

tracks/app/helpers/feed_helper.rb

@@ -62,6 +62,10 @@ module FeedHelper
     joined_notes = split_notes.join("\\n")
   end
   
+  def format_ical_uid(todo)
+    sprintf("%s%s%s%s", @request.protocol, @request.host, @request.port_string, url_for(:controller => 'todo', :action => 'show', :id => todo.id))
+  end
+  
   def rss_feed_link(options = {})
     image_tag = image_tag("feed-icon", :size => "16X16", :border => 0, :class => "rss-icon")
     linkoptions = {:controller => 'feed', :action => 'rss', :name => "#{@user.login}", :token => "#{@user.word}"}

tracks/app/views/feed/ical.rhtml

@@ -13,6 +13,7 @@ BEGIN:VTODO
 DTSTAMP:<%= @todo.created_at.strftime("%Y%m%dT%H%M%SZ") %>
 DTSTART;VALUE=DATE:<%= @todo.created_at.strftime("%Y%m%d") %>
 SUMMARY:<%= @todo.description %>
+UID:<%= format_ical_uid(@todo) %>
 <% if @todo.notes? -%>
 DESCRIPTION:<%= format_ical_notes(@todo.notes) %>
 <% end -%>