create.js

import uuid from 'uuid';
import * as dynamoDbLib from './libs/dynamodb-lib';
import {success, failure} from './libs/response-lib';

export async function main(event, context, callback){
    // Request body is passed in as a JSON encoded string in 'event.body'
    const data = JSON.parse(event.body);

    const params = {
        TableName: 'notes',
        // 'Item' contains the attributes of the item to be created
        // - 'userId': because users are authenticated via Cognito User Pool, we
        //             will use the User Pool sub (a UUID) of the authenticated user
        // - 'noteId': a unique uuid
        // - 'content': parsed from request body
        // - 'attachment': parsed from request body
        // - 'createdAt': current Unix timestamp
        Item: {
            userId: event.requestContext.authorizer.claims.sub,
            noteId: uuid.v1(),
            content:data.content,
            attachment: data.attachment,
            createdAt: new Date().getTime(),
        },
    };

    try{
        const result = await dynamoDbLib.call('put', params);
        callback(null, success(params.Item));
    }
    catch(e){
        callback(null, failure({status: false, error: e}));
    }
};