245 

   246 

   247 /* this function returns a list of ids of tweet lines */

   248 IriSP.JSONSerializer.prototype.getTweetIds = function() {

   249   if (typeof(this._data.lists) === "undefined" || this._data.lists === null)

   250     return [];

   251 

   252   var tweetsId = [];

   253   

   254   /* first get the list containing the tweets */

   255   var tweets = IriSP.underscore.filter(this._data.lists, function(entry) { return entry.id.indexOf("tweet") !== -1 });

   256   

   257   // FIXME: collect tweets from multiple sources ?

   258   tweetsId = IriSP.underscore.pluck(tweets[0].items, "id-ref");

   259 

   260   return tweetsId;

   261 };

   262 

   263 /* this function returns a list of lines which are not tweet lines */

   264 IriSP.JSONSerializer.prototype.getNonTweetIds = function() {

   265   if (typeof(this._data.lists) === "undefined" || this._data.lists === null)

   266     return [];

   267   

   268   /* get all the ids */

   269   var ids = IriSP.underscore.map(this._data.lists, function(entry) {                                                         

   270                                                          return IriSP.underscore.pluck(entry.items, "id-ref"); });

   271                                                          

   272   var illegal_values = this.getTweetIds();

   273   return IriSP.underscore.difference(ids, illegal_values);

   274   

   275 };