URL builder for Backbone-like router.

backbone-route-builder.js

resolveURL: function (route, params, appendRoot) {
  
  var appendRoot = (appendRoot == false) ? false : true;
  var route, params;
  var href = "";
  
  var regExpAllNormalParams = /(\(\?)?\/:\w+/g;
  var regExpAllOptionalParams = /\((.*?)\)/g;             
  
  href = router.routes[route];
  for (var p in params) {
      //matchs normal parameters
      var regExpNormal = new RegExp("(\\(\\?)?:"+ p);
      
      //matchs optional parameters
      var regExpOptional = new RegExp("\\((/:" + p + ")\\)");
      
      //matchs named parameters
      var regExpNamedParams = new RegExp("\\((/([^\\/]+):"+p+")\\)");
    
      //this is if the parameter has any special way of encoding itself (such as a date could be enconded as text yy-mm-dd)
      //var value = router.encodeParameter(p, params[p]); 
  
      var nameOptParam = href.match(regExpNamedParams); 
      if (nameOptParam != null) {
          href = href.replace(regExpNamedParams, "/" + ((nameOptParam[2]) ? nameOptParam[2] : "") + escape(value));
      }
      href = href.replace(regExpOptional, "/" + escape(value));
      href = href.replace(regExpNormal, escape(value));
  }
  
  href = href.replace(regExpAllOptionalParams, "");
  href = href.replace(regExpAllNormalParams, "");
  //if the app has any root url
  //href = (appendRoot) ? app.root + href : href; 

  return href; 
}