ServerLess using Lambda - DynamoDB

delete.js

'use strict'
const AWS = require('aws-sdk');

exports.handler = async (event, context) => {
  const documentClient = new AWS.DynamoDB.DocumentClient();
  
  let responseBody = "";
  let statusCode = 0;
  
  const { id } = event.pathParameters;
  
  const params = {
    TableName: "CallDetails",
    Key: {
      id: id,
    }
  }
  
  try {
    const data = await documentClient.delete(params).promise();
    responseBody = JSON.stringify(data);
    statusCode = 204;
  } catch(err) {
    responseBody = `Unable to delete call details: ${err}`;
    statusCode = 403;
  }

  const response = {
   statusCode: statusCode,
    headers: {
      "Content-Type": "application/json",
      "access-control-allow-origin": "*"
    },
    body: responseBody
  }
  
  return response;

}

getAll.js

'use strict'
const AWS = require('aws-sdk');

exports.handler = async (event, context) => {
  const documentClient = new AWS.DynamoDB.DocumentClient();
  
  let responseBody = "";
  let statusCode = 0;
  
  const params = {
    TableName: "CallDetails"
  }
  
  try {
    const data = await documentClient.scan(params).promise();
    responseBody = JSON.stringify(data.Items);
    statusCode = 200;
  } catch(err) {
    responseBody = `Unable to get all call details: ${err}`;
    statusCode = 403;
  }

  const response = {
   statusCode: statusCode,
    headers: {
      "Content-Type": "application/json",
      "access-control-allow-origin": "*"
    },
    body: responseBody
  }
  
  return response;

}

put.js

'use strict'
const AWS = require('aws-sdk');

exports.handler = async (event, context) => {
  const documentClient = new AWS.DynamoDB.DocumentClient();
  
  let responseBody = "";
  let statusCode = 0;
  
  const {id, memberid} = JSON.parse(event.body);
  
  
  
  const params = {
    TableName: "CallDetails",
    Item: {
      id: id,
      memberid: memberid 
    }
  }
  
  try {
    const data = await documentClient.put(params).promise();
    responseBody = JSON.stringify(data);
    statusCode = 201;
  } catch(err) {
    responseBody = `Unable to put call details: ${err}`;
    statusCode = 403;
  }

  const response = {
   statusCode: statusCode,
    headers: {
      "Content-Type": "application/json",
      "access-control-allow-origin": "*"
    },
    body: responseBody
  }
  
  return response;

}

update.js

'use strict'
const AWS = require('aws-sdk');

exports.handler = async (event, context) => {
  const documentClient = new AWS.DynamoDB.DocumentClient();
  
  let responseBody = "";
  let statusCode = 0;
  
  const {id, memberid} = JSON.parse(event.body);
  const params = {
    TableName: "CallDetails",
    Key: {
      id: id
    },
    UpdateExpression: "set memberid = :n",
    ExpressionAttributeValues: {
     ":n": memberid
    },
    ReturnValues: "CALLDETAIL_UPDATE" 
  }
  
  try {
    const data = await documentClient.update(params).promise();
    responseBody = JSON.stringify(data);
    statusCode = 201;
  } catch(err) {
    responseBody = `Unable to update call details: ${err}`;
    statusCode = 403;
  }

  const response = {
   statusCode: statusCode,
    headers: {
      "Content-Type": "application/json",
      "access-control-allow-origin": "*"
    },
    body: responseBody
  }
  
  return response;

}

put (create) :
domain.com/callDetails/{id}

delete :
domain.com/callDetails/{id}

getAll :
domain.com/callDetails

update :
domain.com/callDetails/{id}