Jquery ajax dummy responses, to remove need to wait for backend implementation...

ajaxDummyResponse.js

(function($){
  
  /* 
  
     ajaxDummyResponse.js
     TF 2012
  
     Let frontenders using jquery play around with dummy ajax responses
     instead of waiting for backenders in an easy way...
  
     Please Note: First discuss, agree on and document an API...
     so that the bridge will meet at the middle when you remove the dummies
  */
  
  /* Usage:
   
     Register a dummy like so:
     
     $.ajax.dummy(condition,function);
     
     where condition is a string like 'url == 'backend.php" && data.action == "fetch"'
     and func is a function that will recieve the jquery ajax settings object
     
     Make your ajax call:
     
     $.ajax({url: 'backend.php', data: {action: 'fetch'}, success: function(){doSomething()});
     
     if the call matches a dummy condition then the dummy function will answer it
     by ignoring server communication and sending its function result to the success method
     
  */
  
  var dummyMem = [], realAjax = $.ajax;
  
  $.ajax = function(a){
    for(var i = 0; i < dummyMem.length; i++){
      if(dummyMem[i].condition(a)){
        (function(){
          var func = dummyMem[i].func, obj = a;
          setTimeout(function(){
            if(!obj.success){return;}
            obj.success.apply(obj,[func(obj)])
          },1);
        })();
        return;
      }
    }
    return realAjax.apply($,[a]);
  };
  
  $.ajax.dummy = function(condition,func){
    var condFunc;
    eval('condFunc=function(d){with(d){return ' + condition + '}}');
    dummyMem.push({condition:condFunc,func:func});
  }
  
})(jQuery);