condition check lambda

lambdas/shared/utils/logger.js

@@ -0,0 +1,61 @@
+/**
+ * CloudWatch-compatible structured logger for Lambda functions.
+ * Outputs JSON logs that CloudWatch Logs Insights can parse and query.
+ */
+
+const LOG_LEVELS = {
+  debug: 0,
+  info: 1,
+  warn: 2,
+  error: 3,
+};
+
+// Default to 'info' in production, 'debug' in development
+const currentLevel = LOG_LEVELS[process.env.LOG_LEVEL?.toLowerCase()] ?? LOG_LEVELS.info;
+
+/**
+ * Create a log entry in CloudWatch-compatible JSON format.
+ * @param {string} level - Log level (debug, info, warn, error)
+ * @param {string} message - Log message
+ * @param {Object} meta - Additional metadata to include
+ */
+function log(level, message, meta = {}) {
+  if (LOG_LEVELS[level] < currentLevel) {
+    return;
+  }
+
+  const entry = {
+    timestamp: new Date().toISOString(),
+    level: level.toUpperCase(),
+    message,
+    ...meta,
+  };
+
+  // Add Lambda context if available
+  if (process.env.AWS_LAMBDA_FUNCTION_NAME) {
+    entry.function = process.env.AWS_LAMBDA_FUNCTION_NAME;
+  }
+  if (process.env.AWS_LAMBDA_LOG_STREAM_NAME) {
+    entry.logStream = process.env.AWS_LAMBDA_LOG_STREAM_NAME;
+  }
+
+  const output = JSON.stringify(entry);
+
+  switch (level) {
+    case "error":
+      console.error(output);
+      break;
+    case "warn":
+      console.warn(output);
+      break;
+    default:
+      console.log(output);
+  }
+}
+
+module.exports = {
+  debug: (message, meta) => log("debug", message, meta),
+  info: (message, meta) => log("info", message, meta),
+  warn: (message, meta) => log("warn", message, meta),
+  error: (message, meta) => log("error", message, meta),
+};