/static/js/models/websearchmodel.js

define([
  'config',
  'config/searchProviders',
  'underscore',
  'backbone',
  'models/stackmodel',
  'lib/template',
  'lib/urlhelper',
  'logger'
], function (config, searchProviders, util, Backbone, StackModel, template, URLHelper, logger) {

  var WebSearchModel = Backbone.Model.extend({
    
    urlTemplate: '',
    
    initialize: function (attributes, options) {
      options = options || {};

      if (!this.get('search_provider')) this.set(
        { search_provider: searchProviders['default']},
        { silent: true }
      );      
      
      if (!this.urlHelper) this.urlHelper = new URLHelper({
        template: '{ base }search/{ provider }{ query }',
        tokens: {
          base: config.applicationRoot,
          provider: this.get('search_provider')
        },
        query: {
          q: this.get('search_terms')
        }
      });

      this.urlTemplate = template(options.template || this.urlTemplate);
    },
    url: function() {
      // Make sure URL is up-to-date with current variables on model.
      var provider = { provider: this.get('search_provider') };
      var query = { q: this.get('search_terms') };
      return this.urlHelper.url(provider, query);
    },
    getResultModelFromElement: function(el) {
      var terms = this.get('search_terms');
      var model = new StackModel({
        'place_title': el.getAttribute('data-title') || "Missing title", 
        'place_url': el.getAttribute('data-url') || el.href,
        'search_terms': terms,
        // TODO: GB: hard-coded. This should be pulled from a list of registered
        // search providers -- probably from an API somewhere. The client should
        // be dumb.
        'search_provider': 'bing',
        search_url: template(config.searchResults)({
          query: terms,
          provider: 'bing'
        })
      });

      // Set URL root on this model -- it's an orphan (doesn't belong)
      // to a collection, so we need to tell Backbone what to hit.
      this.urlHelper = new URLHelper({
        template: config.latticeUrl + '{ query }',
        tokens: {
          latticeRoot:  config.latticeRoot,
          username: config.username,
          service: 'stack',
          method: 'search'
        },
        query: {
          v: 2,
          q: terms
        }
      });

      model.urlRoot = this.urlHelper.url();

      return model;
    }
  });
  
  return WebSearchModel;
});