logger.ts•1.89 kB
import { appendFileSync } from 'fs';
export enum LogLevel {
DEBUG = 0,
INFO = 1,
WARN = 2,
ERROR = 3
}
// Check environment variable for logging
const isLoggingEnabled = process.env.LOGGING === 'true';
// Check environment variable for logging in a file
const isLoggingFileEnabled = process.env.LOGGING_FILE === 'true';
export class Logger {
private level: LogLevel;
private prefix: string;
constructor(prefix: string, level: LogLevel = LogLevel.INFO) {
this.prefix = prefix;
this.level = level;
}
debug(message: string, data?: any) {
this.log(LogLevel.DEBUG, message, data);
}
info(message: string, data?: any) {
this.log(LogLevel.INFO, message, data);
}
warn(message: string, data?: any) {
this.log(LogLevel.WARN, message, data);
}
error(message: string, error?: any) {
this.log(LogLevel.ERROR, message, error);
}
isLoggingEnabled(): boolean {
return isLoggingEnabled;
}
isLoggingFileEnabled(): boolean {
return isLoggingFileEnabled;
}
private log(level: LogLevel, message: string, data?: any) {
if (level < this.level) return;
const timestamp = new Date().toISOString();
const levelStr = LogLevel[level];
const logMessage = `[${timestamp}] [${levelStr}] [${this.prefix}] ${message}`;
// Write to file if file logging is enabled
if (this.isLoggingFileEnabled()) {
try {
appendFileSync('log.txt', logMessage + '\n');
if (data) {
appendFileSync('log.txt', JSON.stringify(data, null, 2) + '\n');
}
} catch (error) {
console.error('Failed to write to log file:', error);
}
}
// Write to console if logging is enabled
if (this.isLoggingEnabled()) {
if (data) {
console.log(logMessage, data);
} else {
console.log(logMessage);
}
}
}
}