102 lines
3.0 KiB
JavaScript
102 lines
3.0 KiB
JavaScript
const sqlite = require('sqlite3')
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class Database {
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constructor (app) {
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this._app = app
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this._sql = new sqlite.Database('database.sql')
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}
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ensureIndexes () {
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this._sql.serialize(() => {
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this._sql.run('CREATE TABLE IF NOT EXISTS pings (timestamp BIGINT NOT NULL, ip TINYTEXT, playerCount MEDIUMINT)')
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this._sql.run('CREATE INDEX IF NOT EXISTS ip_index ON pings (ip, playerCount)')
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this._sql.run('CREATE INDEX IF NOT EXISTS timestamp_index on PINGS (timestamp)')
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})
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}
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loadGraphPoints (graphDuration, callback) {
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// Query recent pings
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const endTime = new Date().getTime()
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const startTime = endTime - graphDuration
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this.getRecentPings(startTime, endTime, pingData => {
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const graphPointsByIp = []
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for (const row of pingData) {
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// Load into temporary array
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// This will be culled prior to being pushed to the serverRegistration
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let graphPoints = graphPointsByIp[row.ip]
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if (!graphPoints) {
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graphPoints = graphPointsByIp[row.ip] = []
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}
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graphPoints.push([row.timestamp, row.playerCount])
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}
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Object.keys(graphPointsByIp).forEach(ip => {
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// Match IPs to serverRegistration object
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for (const serverRegistration of this._app.serverRegistrations) {
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if (serverRegistration.data.ip === ip) {
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const graphPoints = graphPointsByIp[ip]
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// Push the data into the instance and cull if needed
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serverRegistration.loadGraphPoints(graphPoints)
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break
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}
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}
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})
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callback()
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})
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}
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loadRecords (callback) {
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let completedTasks = 0
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this._app.serverRegistrations.forEach(serverRegistration => {
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// Find graphPeaks
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// This pre-computes the values prior to clients connecting
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serverRegistration.findNewGraphPeak()
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// Query recordData
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// When complete increment completeTasks to know when complete
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this.getRecord(serverRegistration.data.ip, (playerCount, timestamp) => {
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serverRegistration.recordData = {
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playerCount: playerCount,
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timestamp: timestamp
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}
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// Check if completedTasks hit the finish value
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// Fire callback since #readyDatabase is complete
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if (++completedTasks === this._app.serverRegistrations.length) {
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callback()
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}
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})
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})
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}
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getRecentPings (startTime, endTime, callback) {
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this._sql.all('SELECT * FROM pings WHERE timestamp >= ? AND timestamp <= ?', [
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startTime,
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endTime
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], (_, data) => callback(data))
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}
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getRecord (ip, callback) {
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this._sql.all('SELECT MAX(playerCount), timestamp FROM pings WHERE ip = ?', [
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ip
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], (_, data) => callback(data[0]['MAX(playerCount)'], data[0].timestamp))
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}
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insertPing (ip, timestamp, playerCount) {
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const statement = this._sql.prepare('INSERT INTO pings (timestamp, ip, playerCount) VALUES (?, ?, ?)')
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this._sql.serialize(() => {
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statement.run(timestamp, ip, playerCount)
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})
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statement.finalize()
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}
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}
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module.exports = Database
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