Stennie's two-line MongoDB prompt

.mongorc.js

// Stennie's two-line MongoDB prompt:
// 
//  [##] hh:mm:ss [myState]:[db]@[host]> 
//  MongoDB [serverversion]> 
//

var cmdCount = 0;
var states = ["STARTUP", "PRIMARY", "SECONDARY", "RECOVERING", "FATAL", "STARTUP2", "UNKNOWN", "ARBITER", "DOWN", "ROLLBACK"];

prompt = function() {
	var now = new Date();
	var hours = now.getHours();
	var mins = now.getMinutes();
	var secs = now.getSeconds();

	// Add leading 0 to h:m:s as needed
	var now_ts = (hours < 10 ? '0'+hours : hours) +":"+ (mins < 10 ? '0'+mins : mins) +":"+(secs < 10 ? '0'+secs : secs);

	var host = db.serverStatus().host;
	var version = db.serverStatus().version;

	cmdCount++;
	result = db.isMaster();
	if (result.ismaster && !result.setName) {
		dbState = 'STANDALONE';
	} else if (result.secondary) {
		dbState = 'SECONDARY';
	} else {
		result = db.adminCommand({replSetGetStatus : 1});
		// Interpret numeric myState result
		dbState = states[result.myState];
	}
	return "\n["+cmdCount+"] "+now_ts+" "+dbState+":"+db+"@"+host+"> " + "\n" + 'MongoDB '+version+"> ";
}