post user js lambda function

post-user.js

import { randomUUID } from 'crypto'
import { DynamoDBClient } from "@aws-sdk/client-dynamodb";
import { PutCommand, DynamoDBDocumentClient } from "@aws-sdk/lib-dynamodb";

const client = new DynamoDBClient({});
const docClient = DynamoDBDocumentClient.from(client);
const TABLE_NAME = "Techstarter"

const addToDB = async (entry) => {
  const command = new PutCommand({
    TableName: TABLE_NAME,
    Item: {...entry},
  });
  const response = await docClient.send(command);
  console.log(response);
  return response;
};

function decodeBase64(base64String) {
  try {
    // Use the built-in atob() function to decode the Base64 string
    const decodedString = atob(base64String);
    return decodedString;
  } catch (error) {
    console.error('Error decoding Base64 string:', error);
    return null;
  }
}

export const handler = async (event) => {
  const body = event.body
  const decoded = decodeBase64(body)
  const bodyObj = JSON.parse(decoded)
  const userId = crypto.randomUUID()
  
  const entry = {
    userId: userId,
    firstName: bodyObj.firstName,
    lastName: bodyObj.lastName,
    role: bodyObj.role
  }

  await addToDB(entry)
  // TODO implement
  // create a random uuid
  // read from the body the data: firstName, lastName, role
  // write this data to the database
  // return a response with statusCode and a message
  const response = {
    statusCode: 200,
    body: JSON.stringify(entry),
  };
  return response;
};