From 393d504ecc48be9f3f9cbb2a8310f2375829acf2 Mon Sep 17 00:00:00 2001
From: Trivikram Kamat <16024985+trivikr@users.noreply.github.com>
Date: Wed, 26 Aug 2020 22:22:06 +0000
Subject: [PATCH] chore: add loggerMiddleware initial setup

---
 .../middleware-logger/src/configurations.ts   |  5 +++
 packages/middleware-logger/src/index.ts       |  1 +
 .../middleware-logger/src/loggerMiddleware.ts | 33 +++++++++++++++++++
 3 files changed, 39 insertions(+)
 create mode 100644 packages/middleware-logger/src/loggerMiddleware.ts

diff --git a/packages/middleware-logger/src/configurations.ts b/packages/middleware-logger/src/configurations.ts
index 9aac403af3b97..672757add3816 100644
--- a/packages/middleware-logger/src/configurations.ts
+++ b/packages/middleware-logger/src/configurations.ts
@@ -4,6 +4,11 @@ export interface LoggerInputConfig {
   logger?: Logger;
 }
 
+interface PreviouslyResolved {}
+
 export interface LoggerResolvedConfig {
   logger?: Logger;
 }
+
+export const resolveLoggerConfig = <T>(input: T & PreviouslyResolved & LoggerInputConfig): T & LoggerResolvedConfig =>
+  input;
diff --git a/packages/middleware-logger/src/index.ts b/packages/middleware-logger/src/index.ts
index ce4dc4128ef42..d7f2a5929d5f6 100644
--- a/packages/middleware-logger/src/index.ts
+++ b/packages/middleware-logger/src/index.ts
@@ -1 +1,2 @@
 export * from "./configurations";
+export * from "./loggerMiddleware";
diff --git a/packages/middleware-logger/src/loggerMiddleware.ts b/packages/middleware-logger/src/loggerMiddleware.ts
new file mode 100644
index 0000000000000..86c31f8b98006
--- /dev/null
+++ b/packages/middleware-logger/src/loggerMiddleware.ts
@@ -0,0 +1,33 @@
+import {
+  AbsoluteLocation,
+  FinalizeHandler,
+  FinalizeHandlerArguments,
+  FinalizeHandlerOutput,
+  FinalizeRequestHandlerOptions,
+  MetadataBearer,
+  Pluggable,
+} from "@aws-sdk/types";
+
+import { LoggerResolvedConfig } from "./configurations";
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+export const loggerMiddleware = (options: LoggerResolvedConfig) => <Output extends MetadataBearer = MetadataBearer>(
+  next: FinalizeHandler<any, Output>
+): FinalizeHandler<any, Output> => async (
+  args: FinalizeHandlerArguments<any>
+): Promise<FinalizeHandlerOutput<Output>> => {
+  // TODO: use and call options.logger once it's available in context
+  return next(args);
+};
+
+export const loggerMiddlewareOptions: FinalizeRequestHandlerOptions & AbsoluteLocation = {
+  name: "loggerMiddleware",
+  tags: ["LOGGER"],
+  step: "finalizeRequest",
+};
+
+export const getLoggerPlugin = (options: LoggerResolvedConfig): Pluggable<any, any> => ({
+  applyToStack: (clientStack) => {
+    clientStack.add(loggerMiddleware(options), loggerMiddlewareOptions);
+  },
+});