@socialgorithm/uabc/src/logger/FileLogger.ts

Ultimate Algorithm Battle Client

import * as fs from "fs";
import * as os from "os";
import Logger from "./Logger";

/**
 * File logger module - it replaces the file if it already exists
 * @param file path to log file
 * @returns {Function} log function, takes the writer (identity), and the data to log
 */
export default class FileLogger extends Logger {
  private file: string;

  constructor(file?: string) {
    super();
    if (file) {
      this.file = file;
    } else {
      const currentdate = new Date();
      this.file = "UTTT_" + currentdate.getDate() + "-"
          + (currentdate.getMonth() + 1)  + "-"
          + currentdate.getFullYear() + "_"
          + currentdate.getHours() + "-"
          + currentdate.getMinutes() + "-"
          + currentdate.getSeconds() + ".log";
    }

    fs.writeFileSync(this.file, "");
    console.log(`Logging to file: ${this.file}`);
  }

  public log(writer: string, text: string): void {
    const time = (new Date()).toTimeString().substr(0, 8);
    fs.appendFileSync(this.file, `[${time} ${writer}] ${text}${os.EOL}`);
  }
}