first commit

server/utils/logger.js

@@ -0,0 +1,40 @@
+const winston = require('winston');
+const path = require('path');
+
+// Create logs directory if it doesn't exist
+const fs = require('fs');
+const logsDir = path.join(__dirname, '../../logs');
+if (!fs.existsSync(logsDir)) {
+  fs.mkdirSync(logsDir, { recursive: true });
+}
+
+const logger = winston.createLogger({
+  level: process.env.LOG_LEVEL || 'info',
+  format: winston.format.combine(
+    winston.format.timestamp(),
+    winston.format.errors({ stack: true }),
+    winston.format.json()
+  ),
+  defaultMeta: { service: 'reason-flow' },
+  transports: [
+    new winston.transports.File({ 
+      filename: path.join(logsDir, 'error.log'), 
+      level: 'error' 
+    }),
+    new winston.transports.File({ 
+      filename: path.join(logsDir, 'combined.log') 
+    })
+  ]
+});
+
+// Add console transport for development
+if (process.env.NODE_ENV !== 'production') {
+  logger.add(new winston.transports.Console({
+    format: winston.format.combine(
+      winston.format.colorize(),
+      winston.format.simple()
+    )
+  }));
+}
+
+module.exports = logger;