import { InvocationContext } from '@azure/functions';
export class Logger {
private context?: InvocationContext;
constructor(context?: InvocationContext) {
this.context = context;
}
/**
* DRY: Centralized logging method to eliminate repetitive patterns
*/
private logInternal(level: 'INFO' | 'ERROR' | 'WARN' | 'DEBUG', message: string, meta?: any): void {
const logMessage = `[${level}] ${new Date().toISOString()} - ${message}`;
const metaData = meta || '';
if (this.context) {
switch (level) {
case 'INFO':
this.context.log(logMessage, metaData);
break;
case 'ERROR':
this.context.error(logMessage, metaData);
break;
case 'WARN':
this.context.warn(logMessage, metaData);
break;
case 'DEBUG':
this.context.debug(logMessage, metaData);
break;
}
} else {
const consoleMethod = level === 'INFO' ? console.log :
level === 'ERROR' ? console.error :
level === 'WARN' ? console.warn : console.debug;
consoleMethod(logMessage, metaData);
}
}
info(message: string, meta?: any): void {
this.logInternal('INFO', message, meta);
}
error(message: string, error?: any): void {
this.logInternal('ERROR', message, error);
}
warn(message: string, meta?: any): void {
this.logInternal('WARN', message, meta);
}
debug(message: string, meta?: any): void {
if (process.env.NODE_ENV === 'development') {
this.logInternal('DEBUG', message, meta);
}
}
}
