Bridge between backbonejs models (and collections) and the CiviCRM CRM.api

backbone_crm.js

var CRMModel = Backbone.Model.extend({                                       
  // redirect sync to custom method                                           
  sync: this.crmSync,                                                             
  // Custom bridge to V3 civicrm API                                         
  crmSync: function(method, model, options) {                                 
    // make a shallow copy of options ? uneccesary but seems safest??         
    var params = _.clone(options);                                           
    // look up this models enity (as either method or property)               
    var entity =  _.result(this, 'entity');                                   
    var action = '';  // is there a good value to pass the api to throw error?
    switch (method) {                                                         
      case "create": // create the model on the server                       
        action = 'create';  // CHECKME!                                       
        break;                                                               
      case "read":   // read this model from the server and return it         
        action = 'read'; // CHECKME!                                         
        break;                                                               
      case "update": // update the model on the server with the argument     
        action = 'update'; // CHECKME!                                       
        break;                                                               
      case "delete": // delete the model from the server.                     
        action = 'delete'; // CHECKME!                                       
        break;                                                               
    }                                                                         
    // creat success handler:                                                 
    var successHandler = function(model) {                                   
      // stuff in here??                                                     
      if(options.success) options.success(model);                             
    };                                                                       
    // creat success handler:                                                 
    // FIXME this needs to be called somehow                                 
    var errorHandler = function(model) {                                     
      // stuff in here??                                                     
      if(options.error) options.error(model);                                 
    };                                                                       
    // call API                                                               
    CRM.api(entity, action, params, {success: successHandler})               
  }                                                                           
});