Handlebars Helpers

handlebars-helpers.js

(function () {
	"use strict";
	Handlebars.registerHelper('isSelected', function (optId, id) {
		return optId === id ? 'selected="true"' : '';
	});
	
	Handlebars.registerHelper('classIf', function (val, className) {
		return val ? className : '';
	});
	
	Handlebars.registerHelper('truncate', function (str, len) {
		if (str.length > len && str.length > 0) {
			var new_str = str + " ";
			new_str = str.substr(0, len);
			new_str = str.substr(0, new_str.lastIndexOf(" "));
			new_str = (new_str.length > 0) ? new_str : str.substr(0, len);

			return new Handlebars.SafeString(new_str + '...');
		}
		return str;
	});

	Handlebars.registerHelper('round', function (num) {
		return parseInt(num, null);
	});

	Handlebars.registerHelper('isZero', function (str) {
		return Handlebars.helpers.round(str) === 0;
	});

	Handlebars.registerHelper('isEmpty', function (str) {
		return str.replace(" ") === "";
	});

	Handlebars.registerHelper('blankForZero', function (str) {
		var val = Handlebars.helpers.round(str);
		return val === 0 ? '' : val;
	});
}());