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