Minetrack/lib/ping.js

var mcpe_ping = require('mcpe-ping');
var mcpc_ping = require('mc-ping-updated');

var profiler = require('./profiler');

// This is a wrapper function for mc-ping-updated, mainly used to convert the data structure of the result.
function pingMinecraftPC(host, port, timeout, callback) {
    profiler.track(host);

	// Try catch incase the down stream module is bad at handling exceptions.
	try {
		mcpc_ping(host, port, function(err, res) {
		    if (err) {
		        callback(err, null);
		    } else {
		    	// Remap our JSON into our custom structure.
		        callback(null, {
					players: {
						online: res.players.online,
						max: res.players.max
					},
					version: res.version.protocol,
					latency: profiler.untrack(host)
				});
		    }
		}, timeout);	
	} catch (err) {
		callback(err, null);
	}
}

// This is a wrapper function for mcpe-ping, mainly used to convert the data structure of the result.
function pingMinecraftPE(host, port, timeout, callback) {
	profiler.track(host);
		
	// Try catch incase the down stream module is bad at handling exceptions.
	try {
		mcpe_ping(host, port || 19132, function(err, res) {
			if (err) {
				callback(err, null);
			} else {
				// Remap our JSON into our custom structure.
				callback(err, {
					players: {
						online: res.currentPlayers,
						max: res.maxPlayers
					},
					version: res.version,
					latency: profiler.untrack(host)
				});
			}
		}, timeout);
	} catch (err) {
		callback(err, null);
	}
}

exports.ping = function(host, port, type, timeout, callback) {
	if (type === 'PC') {
		pingMinecraftPC(host, port || 25565, timeout, callback);
	} else if (type === 'PE') {
		pingMinecraftPE(host, port || 19132, timeout, callback);
	} else {
		throw new Error('Unsupported type: ' + type);
	}
};