@triviality/logger/src/AbstractFunctionLogger.ts

Typescript loggers with an interface that support composition

import { LoggerInterface, LogLevel } from './LoggerInterface';

export abstract class AbstractFunctionLogger implements LoggerInterface {

  public abstract trace(message?: any, ...optionalParams: any[]): void;
  public abstract debug(message?: any, ...optionalParams: any[]): void;
  public abstract info(message?: any, ...optionalParams: any[]): void;
  public abstract warn(message?: any, ...optionalParams: any[]): void;
  public abstract error(message?: any, ...optionalParams: any[]): void;

  public log(level: LogLevel, message?: any, ...optionalParams: any[]): void {
    switch (level) {
      case LogLevel.trace:
        this.trace(message, ...optionalParams);
        break;
      case LogLevel.debug:
        this.debug(message, ...optionalParams);
        break;
      case LogLevel.info:
        this.info(message, ...optionalParams);
        break;
      case LogLevel.warn:
        this.warn(message, ...optionalParams);
        break;
      case LogLevel.error:
        this.error(message, ...optionalParams);
        break;
      default:
        throw new Error(`Log level "${level}" not supported`);
    }

  }

}