create-sekiban-app/template/packages/api/src/utils/logger.ts

Create a new Sekiban application with Dapr

import { config } from '../config/index.js';

type LogLevel = 'error' | 'warn' | 'info' | 'debug';

class Logger {
  private level: LogLevel;

  constructor(level: LogLevel = 'info') {
    this.level = level;
  }

  private shouldLog(level: LogLevel): boolean {
    const levels: LogLevel[] = ['error', 'warn', 'info', 'debug'];
    const currentLevelIndex = levels.indexOf(this.level);
    const requestedLevelIndex = levels.indexOf(level);
    return requestedLevelIndex <= currentLevelIndex;
  }

  private formatMessage(level: LogLevel, message: string, ...args: any[]): void {
    if (!this.shouldLog(level)) return;

    const timestamp = new Date().toISOString();
    const prefix = `[${timestamp}] [${level.toUpperCase()}]`;
    
    switch (level) {
      case 'error':
        console.error(prefix, message, ...args);
        break;
      case 'warn':
        console.warn(prefix, message, ...args);
        break;
      case 'info':
        console.info(prefix, message, ...args);
        break;
      case 'debug':
        console.debug(prefix, message, ...args);
        break;
    }
  }

  error(message: string, ...args: any[]): void {
    this.formatMessage('error', message, ...args);
  }

  warn(message: string, ...args: any[]): void {
    this.formatMessage('warn', message, ...args);
  }

  info(message: string, ...args: any[]): void {
    this.formatMessage('info', message, ...args);
  }

  debug(message: string, ...args: any[]): void {
    this.formatMessage('debug', message, ...args);
  }
}

export default new Logger(config.LOG_LEVEL);