simple-templating.js

/**
 * Very simple find/replace template.
 *
 * Optional filter function that is used on tags with three curlies. Ex: `{{{this_param_will_be_filtered}}}`
 * 
 * @function {mixin} Application.template
 * @param {string} t templateable string
 * @param {object} d data object
 * @... {string} yourKey containing value to replace
 * @param {function(value)} filter a filter function that is passed members of `d` that are templated by triple curlys
 * @return {string} string with templates filled
 * @author [Jasper Palfree](http://wellcaffeinated.net)
 * @license [GPLv3](http://www.gnu.org/licenses/)
 * @example
 * This will return the text: `this is a template!`
 *
 * 	#!javascript
 * 	template("this is a {{what}}", {what: "template!"});
 * 	
 * @example
 * This will return the text: `this is a template!`
 *
 * 	#!javascript
 * 	template("this is a {{nested.what}}", {nested: {what:'template!'} });
 */
function template(t, d, filter){
	var data = d;
	var ret = t;
	
	var segments = ret.match(/\\{?\\{\\{[a-zA-Z$_][a-zA-Z0-9_.$]*\\}\\}\\}?/g);
	for(var x=0, len = segments.length; x < len; x++){
    var tags = segments[x].replace(/[\\{\\}]*/g,').split('.');
		var id = tags.shift();
    var repl = (tags.length > 0)? arguments.callee('{{'+tags.join('.')+'}}',data[id],filter) : '+data[id];
		if(segments[x].match(/^\\{\\{\\{/) && typeof filter === 'function'){
			repl = filter(repl);
		}
		ret = ret.replace(segments[x], repl);
	}
	
	return ret;
};