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) {
    const data = JSON.parse(event.body);
    const params = {
        TableName: process.env.tableName,
        // 'Item' contains the attributes of the item to be created
        // - 'userId': user identities are federated through the
        // Cognito Identity Pool, we will use the identity id as
        // the user id of the autenticated user
        // - 'noteId': a unique uuid
        // - 'content': parsed from request body
        // - 'attachment': parsed from the request body
        // - 'createdAt': current Unix timestamp
        Item: {
            userId: event.requestContext.identity.cognitoIdentityId,
            noteId: uuid.v1(),
            content: data.content,
            attachment: data.attachment,
            createdAt: Date.now()
        }
    };

    try {
        await dynamoDbLib.call("put", params);
        return success(params.Item);
    } catch (e) {
        return failure({status: false});
    }

}