fix: refactor logger initialization and import structure in Router and related types

Author: arnabrahman

packages/event-handler/src/appsync-graphql/Router.ts

@@ -2,8 +2,9 @@ import {
   EnvironmentVariablesService,
   isRecord,
 } from '@aws-lambda-powertools/commons';
+import type { GenericLogger } from '@aws-lambda-powertools/commons/types';
+import { getStringFromEnv } from '@aws-lambda-powertools/commons/utils/env';
 import type {
-  GenericLogger,
   GraphQlRouteOptions,
   GraphQlRouterOptions,
   OnMutationHandler,
@@ -40,7 +41,10 @@ class Router {
 
   public constructor(options?: GraphQlRouterOptions) {
     this.envService = new EnvironmentVariablesService();
-    const alcLogLevel = this.envService.get('AWS_LAMBDA_LOG_LEVEL');
+    const alcLogLevel = getStringFromEnv({
+      key: 'AWS_LAMBDA_LOG_LEVEL',
+      defaultValue: '',
+    });
     this.logger = options?.logger ?? {
       debug: alcLogLevel === 'DEBUG' ? console.debug : () => undefined,
       error: console.error,

packages/event-handler/src/types/appsync-graphql.ts

@@ -1,18 +1,5 @@
 import type { RouteHandlerRegistry } from '../appsync-graphql/RouteHandlerRegistry.js';
-
-// biome-ignore lint/suspicious/noExplicitAny: We intentionally use `any` here to represent any type of data and keep the logger is as flexible as possible.
-type Anything = any;
-
-/**
- * Interface for a generic logger object.
- */
-type GenericLogger = {
-  trace?: (...content: Anything[]) => void;
-  debug: (...content: Anything[]) => void;
-  info?: (...content: Anything[]) => void;
-  warn: (...content: Anything[]) => void;
-  error: (...content: Anything[]) => void;
-};
+import type { Anything, GenericLogger } from './common.js';
 
 // #region OnQuery fn