Homework/cs5260/shared/log/ConsoleLogger.ts


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import { TracingLogger } from ".";

export class ConsoleTracingLogger implements TracingLogger {
  private prefix: string;

  constructor(prefix: string) {
    this.prefix = prefix;
  }

  private makePrefix(level: "info" | "warn" | "error"): string {
    return `[${new Date().toISOString()}] ${level} (${this.prefix}) > `;
  }

  public info(log: string) {
    console.log(this.makePrefix("info") + log);
  }

  public warn(log: string) {
    console.warn(this.makePrefix("warn") + log);
  }

  public error(log: string) {
    console.error(this.makePrefix("error") + log);
  }

  public createChild(prefix: string) {
    return new ConsoleTracingLogger(`${this.prefix} -> ${prefix}`);
  }
}