adding data-services

libs/utils/src/logger.ts

@@ -0,0 +1,65 @@
+/**
+ * Logger utility with consistent formatting and log levels
+ */
+export class Logger {
+  constructor(private serviceName: string, private level: LogLevel = LogLevel.INFO) {}
+  
+  debug(message: string, ...args: any[]): void {
+    this.log(LogLevel.DEBUG, message, ...args);
+  }
+  
+  info(message: string, ...args: any[]): void {
+    this.log(LogLevel.INFO, message, ...args);
+  }
+  
+  warn(message: string, ...args: any[]): void {
+    this.log(LogLevel.WARN, message, ...args);
+  }
+  
+  error(message: string, ...args: any[]): void {
+    this.log(LogLevel.ERROR, message, ...args);
+  }
+  
+  private log(level: LogLevel, message: string, ...args: any[]): void {
+    if (level < this.level) return;
+    
+    const timestamp = new Date().toISOString();
+    const levelStr = LogLevel[level].padEnd(5);
+    
+    const logMessage = `[${timestamp}] [${levelStr}] [${this.serviceName}] ${message}`;
+    
+    switch (level) {
+      case LogLevel.ERROR:
+        console.error(logMessage, ...args);
+        break;
+      case LogLevel.WARN:
+        console.warn(logMessage, ...args);
+        break;
+      case LogLevel.INFO:
+        console.info(logMessage, ...args);
+        break;
+      case LogLevel.DEBUG:
+      default:
+        console.debug(logMessage, ...args);
+        break;
+    }
+  }
+  
+  setLevel(level: LogLevel): void {
+    this.level = level;
+  }
+}
+
+export enum LogLevel {
+  DEBUG = 0,
+  INFO = 1,
+  WARN = 2,
+  ERROR = 3
+}
+
+/**
+ * Create a new logger instance
+ */
+export function createLogger(serviceName: string, level: LogLevel = LogLevel.INFO): Logger {
+  return new Logger(serviceName, level);
+}