JavaScript implementation of the NotesName class

notesname.js

function NotesName(p) {
	var name = p;
	
	// regular expressions that we use to extract information
	var Regexp = {
		abbreviated: /(?:CN|OU|O|C)=/gi,
		isName: /CN=.+(?:\/OU=.+)*\/O=.+(?:\/C=.+)?/i,
		common: /CN=([\w\s]*)\//i,
		given: /^(\w+)\s/,
		surname: /\s(\w+)$/,
		organization: /\/O=([\w\s]*)\//i,
		country: /\/C=([\w\s]*)/i
	};
	
	if(!Regexp.isName.test(name)) {
		// TODO: Perhaps we need some proper error handling here instead of returning null?
		return null;
	}
	
	// tries to extract a piece of information, returns null on failure
	function extract(subject, regexp) {
		if(subject === null || subject === undefined || regexp === null || regexp === undefined) {
			return null;
		}
		
		var matches = subject.match(regexp, "i");
		
		if(matches !== null && matches !== undefined && matches.length >= 2) {
			return matches[1];
		}
		
		return null;
	}
	
	return {
		getAbbreviated: function() {
			return name.replace(Regexp.abbreviated, '');
		},
		getHierarchical: function() {
			return name;
		},
		getCommon: function() {
			return extract(name, Regexp.common);
		},
		getGiven: function() {
			return extract(this.getCommon(), Regexp.given);
		},
		getSurname: function() {
			return extract(this.getCommon(), Regexp.surname);
		},
		getOrganization: function() {
			return extract(name, Regexp.organization);
		},
		getCountry: function() {
			return extract(name, Regexp.country);
		},
		// use the other methods if possible, this one is about 1.8x slower
	 	getPiece: function(piece) {			
			return extract(name, piece+"=([\\w\\s]*)");
		}
	};
}