hbs-helpers-sync/hbs.helpers.sync.js

sync Handlebars helpers between server and client

(function(window){

	var root = window;

	var exclude, include, helpers, Handlebars;

	function HHS(){

	}

	HHS.VERSION = "0.1.6";

	if (typeof exports !== 'undefined') {
	  if (typeof module !== 'undefined' && module.exports) {
	   	exports = module.exports = HHS;
	  }
	  exports = HHS;
	}else{
		root.HHS = HHS;
	}

	function check(funcname, val){
		if(typeof val === "string"){
			if(funcname == val){
				return true;
			}
		}else if(val.length > 0){
			return val.indexOf(funcname) !== -1;
		}
		return false;
	}

	function register(funcname){
		Handlebars.registerHelper(funcname, helpers[funcname]);
	}

	HHS.sync = function(params){

		params = params || {};

		Handlebars = params.Handlebars || root.Handlebars;
		params.helpers = params.helpers;

		params.exclude = params.exclude || "";
		params.include = params.include || "";

		if(!Handlebars){
			throw new Error("please provide a Handlebars reference");
		}

		if(!params.helpers){
			throw new Error("please provide an object with helper functions");
		}

		for(var funcname in helpers){
			if(include){
				if(check(funcname, include)){
					register(funcname);
				}
			}else if(exclude){
				if(!check(funcname, exclude)){
					register(funcname);
				}
			}else{
				register(funcname);
			}
		}


	};

}.call(this, window));