SLSCMN-5 initial middyfy function

src/utils/index.ts

@@ -1 +1 @@
-export { middyfyAPIGateway } from './middyfy';
+export { middyfy } from './middyfy';

src/utils/middyfy.ts

@@ -1,19 +1,22 @@
-import { APIGatewayProxyEvent, APIGatewayProxyResult, Context } from 'aws-lambda';
-import { ObjectSchema } from 'joi';
-import middy from '@middy/core';
-import httpEventNormalizer from '@middy/http-event-normalizer';
-import jsonBodyParser from '@middy/http-json-body-parser';
+import { Handler } from 'aws-lambda';
+import middy, { MiddlewareObj, MiddyfiedHandler } from '@middy/core';
 
-type ApiGatewayHandlerFn = (
-  event: APIGatewayProxyEvent,
-  context: Context,
-) => Promise<APIGatewayProxyResult>;
-
-export interface MiddyfyOptions<THandler> {
-  handler: THandler;
-  eventSchema?: ObjectSchema;
-}
-
-export const middyfyAPIGateway = (options: MiddyfyOptions<ApiGatewayHandlerFn>) => {
-  return middy(options.handler).use(httpEventNormalizer()).use(jsonBodyParser());
+/**
+ *
+ * @param lambdaHandler - The AWS Lambda handler function.
+ * @param middlewares - Optional. An array of middlewares which will be attached
+ * to the handler in the order in which they appear in the array.
+ * @returns A handler function wrapped in middleware to be used as the handler
+ * function for the AWS Lambda function.
+ */
+export const middyfy = (
+  lambdaHandler: Handler,
+  middlewares?: MiddlewareObj[],
+): MiddyfiedHandler => {
+  // prepare the handler so that it may have middleware(s) attached
+  const handler = middy(lambdaHandler);
+  // attach middleware(s)
+  middlewares?.forEach((middleware) => handler.use(middleware));
+  // return the "middyfied" handler
+  return handler;
 };