var logger = require('./logger'); var config = require('../config.json'); var servers = require('../servers.json'); var serverNameLookup = []; var bootTime; // Finds a server in servers.json with a matching IP. // If it finds one, it caches the result for faster future lookups. function getServerNameByIp(ip) { var lookupName = serverNameLookup[ip]; if (lookupName) { return lookupName; } for (var i = 0; i < servers.length; i++) { var entry = servers[i]; if (entry.ip === ip) { serverNameLookup[entry.ip] = entry.name; return entry.name; } } } // Returns a list of configured server IPs from servers.json function getServerIps() { var ips = []; for (var i = 0; i < servers.length; i++) { ips.push(servers[i].ip); } return ips; } // This method is a monstrosity. // Since we loaded ALL pings from the database, we need to filter out the pings so each entry is a minute apart. // This is done by iterating over the list, since the time between each ping can be completely arbitrary. function trimUselessPings(data) { var keys = Object.keys(data); for (var i = 0; i < keys.length; i++) { var listing = data[keys[i]]; var lastTimestamp = 0; var filteredListing = []; for (var x = 0; x < listing.length; x++) { var entry = listing[x]; // 0 is the index of the timestamp. // See the convertPingsToGraph method. if (entry[0] - lastTimestamp >= 60 * 1000) { // This second check tries to smooth out randomly dropped pings. // By default we only want entries that are online (playerCount > 0). // This way we'll keep looking forward until we find one that is online. // However if we can't find one within a reasonable timeframe, select the sucky one. if (entry[0] - lastTimestamp >= 120 * 1000 || entry[1] > 0) { filteredListing.push(entry); lastTimestamp = entry[0]; } } } data[keys[i]] = filteredListing; } } exports.trimOldPings = function(data) { var keys = Object.keys(data); var timeMs = exports.getCurrentTimeMs(); for (var x = 0; x < keys.length; x++) { var listing = data[keys[x]]; var toSplice = []; for (var i = 0; i < listing.length; i++) { var entry = listing[i]; if (timeMs - entry[0] > config.graphDuration) { toSplice.push(i); } } for (var i = 0; i < toSplice.length; i++) { listing.splice(toSplice[i], 1); } } } exports.getCurrentTimeMs = function() { return new Date().getTime(); }; exports.setIntervalNoDelay = function(func, delay) { var task = setInterval(func, delay); func(); return task; }; exports.convertPingsToGraph = function(sqlData) { var serverIps = getServerIps(); var graphData = {}; var startTime = exports.getCurrentTimeMs(); for (var i = 0; i < sqlData.length; i++) { var entry = sqlData[i]; if (serverIps.indexOf(entry.ip) === -1) { continue; } var name = getServerNameByIp(entry.ip); if (!graphData[name]) { graphData[name] = []; } graphData[name].push([entry.timestamp, entry.playerCount]); } // Break it into minutes. trimUselessPings(graphData); // Drop old data. exports.trimOldPings(graphData); logger.info('Converted data structure in ' + (exports.getCurrentTimeMs() - startTime) + 'ms'); return graphData; }; exports.getBootTime = function() { if (!bootTime) { bootTime = exports.getCurrentTimeMs(); logger.info('Selected %d as boot time.', bootTime); } return bootTime; };