89 lines
No EOL
2.4 KiB
TypeScript
89 lines
No EOL
2.4 KiB
TypeScript
import { ConsoleHelper } from "../../ConsoleHelper";
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import { createPool, Pool } from "mysql2";
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export class Database {
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private connectionPool:Pool;
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private static readonly CONNECTION_LIMIT = 128;
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public connected:boolean = false;
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public constructor(databaseAddress:string, databasePort:number = 3306, databaseUsername:string, databasePassword:string, databaseName:string, connectedCallback:Function) {
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this.connectionPool = createPool({
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connectionLimit: Database.CONNECTION_LIMIT,
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host: databaseAddress,
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port: databasePort,
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user: databaseUsername,
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password: databasePassword,
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database: databaseName
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});
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const classCreationTime:number = Date.now();
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let lastQueryFinished = true;
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const connectionCheckInterval = setInterval(() => {
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if (lastQueryFinished) {
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lastQueryFinished = false;
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this.query("SELECT name FROM osu_info LIMIT 1")
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.then(data => {
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if (!this.connected) {
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this.connected = true;
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ConsoleHelper.printInfo(`Connected to database. Took ${Date.now() - classCreationTime}ms`);
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clearInterval(connectionCheckInterval);
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lastQueryFinished = true;
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connectedCallback();
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}
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})
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.catch(err => {
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lastQueryFinished = true;
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});
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}
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}, 16);
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}
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public query(query = "", data?:Array<any>) {
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const limited = query.includes("LIMIT 1");
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return new Promise<any>((resolve, reject) => {
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this.connectionPool.getConnection((err, connection) => {
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if (err) {
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reject(err);
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try {
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connection.release();
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} catch (e) {
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ConsoleHelper.printError("Failed to release mysql connection\n" + err);
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}
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} else {
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// Use old query
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if (data == null) {
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connection.query(query, (err, data) => {
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if (err) {
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reject(err);
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connection.release();
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} else {
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dataReceived(resolve, data, limited);
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connection.release();
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}
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});
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}
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// Use new prepared statements w/ placeholders
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else {
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connection.execute(query, data, (err, data) => {
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if (err) {
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reject(err);
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connection.release();
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} else {
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dataReceived(resolve, data, limited);
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connection.release();
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}
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});
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}
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}
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});
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});
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}
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}
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function dataReceived(resolveCallback:(value:unknown) => void, data:any, limited:boolean = false) : void {
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if (limited) resolveCallback(data[0]);
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else resolveCallback(data);
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} |