rsstodolist : add ability to fetch last links from a rsstodolist feed

src/scripts/rsstodolist.coffee

@@ -1,29 +1,32 @@
 # Description:
-#   Allows you to send links to the RssToDoList service
+#   Allows you to send or fetch links to/from the rsstodolist service (https://rsstodolist.appspot.com)
 #
 # Dependencies:
-#   None
+#   jsdom
 #
 # Configuration:
 #   None
 #
 # Commands:
-#   hubot rtdl show <user_name> - Display the <user_name> RssToDoList feed url
-#   hubot rtdl add <user_name> <link> - Send the <link> to <user_name> RssToDoList feed
+#   hubot rtdl show <user_name> - Display the <user_name> rsstodolist feed url
+#   hubot rtdl add <user_name> <link> - Send the <link> to <user_name> rsstodolist feed
+#   hubot rtdl last <user_name> <limit> - Display last <optional limit> links for that <user_name>
 #
 # Author:
 #   athieriot
+#   paulgreg
+jsdom = require 'jsdom'
 
 module.exports = (robot) ->
-  robot.respond /rtdl (add|show) ([^ ]*)( .*)?/i, (msg) ->
+  robot.respond /rtdl (add|show|last) ([^ ]*)( .*)?/i, (msg) ->
    server_url = 'http://rsstodolist.appspot.com'
 
-   [action, user_name, link] = [msg.match[1], escape(msg.match[2]), msg.match[3]]
+   [action, user_name, arg] = [msg.match[1], escape(msg.match[2]), msg.match[3]]
 
-   if action == 'add' && link != undefined
+   if action == 'add' && arg != undefined
       msg.http(server_url + '/add')
          .query(n: user_name)
-         .query(url: link.trim())
+         .query(url: arg.trim())
          .get() (err, res, body) ->
             status = res.statusCode 
 
@@ -33,3 +36,15 @@ module.exports = (robot) ->
                msg.reply "An error occured on " + user_name + " feed" 
    else if action == 'show'
       msg.reply user_name + ' feed is ' + server_url + '/?n=' + user_name
+   else if action == 'last'
+      msg.http(server_url + '/')
+         .query(n: user_name)
+         .query(l: arg || 10)
+         .get() (err, res, body) ->
+            try
+              xml = jsdom.jsdom(body)
+              for item in xml.getElementsByTagName("rss")[0].getElementsByTagName("channel")[0].getElementsByTagName("item")
+                do (item) ->
+                  msg.reply " - " + item.getElementsByTagName("link")[0].childNodes[0].nodeValue
+            catch err
+                  msg.reply err