Lazy load todo app

lazy_load_todo.js

'use strict';

const { DynamoDBClient } = require("@aws-sdk/client-dynamodb");
const { DynamoDBDocumentClient, PutCommand } = require("@aws-sdk/lib-dynamodb");
const dynamoClient = new DynamoDBClient({ region: process.env.AWS_REGION });
const ddbClient = DynamoDBDocumentClient.from(dynamoClient);

let snsClient, PublishBatchCommand, SNSClient
const { v4: uuidv4 } = require("uuid");

const loadSns = () => {
  ({ SNSClient, PublishBatchCommand } = require("@aws-sdk/client-sns"));
  snsClient = new SNSClient({ region: process.env.AWS_REGION });
}

module.exports.addItem = async (event) => {
  const body = JSON.parse(event.body);
  const promises = []
  const newItemId = uuidv4()
  if (body.userId === 'aj') {
    loadSns();
    const snsCommand = new PublishBatchCommand({
      PublishBatchRequestEntries: [{
        Message: JSON.stringify(body),
        Id: newItemId,
      }],
      TopicArn: process.env.TODO_TOPIC_ARN
    })
    promises.push(snsClient.send(snsCommand))
  }
 
  const { status, item, itemName } = body
  const putItemCommand = new PutCommand({
    TableName: process.env.TODO_TABLE_NAME,
    Item: {
      pk: newItemId,
      sk: Date.now().toString(),
      status,
      item,
      itemName
    }
  })

  promises.push(ddbClient.send(putItemCommand))

  const res = await Promise.allSettled(promises)

  return {
    statusCode: 200,
    headers: {
      "content-type": "application/json",
    },
    body: JSON.stringify({ status: "pushed", body }),
  };
};