Connect Azure Blob NDJSON file and Amazon S3 CSV file in our serverless environment

class AzureBlobSourceReadRemoteNdjson {
    async init() {
        // More info at https://docs.microsoft.com/en-us/azure/storage/blobs/storage-quickstart-blobs-nodejs
        // TODO: Create team variables. More info at https://yepcode.io/docs/processes/team-variables
        this.azureBlob = BlobServiceClient.fromConnectionString(
            yepcode.env.AZURE_BLOB_CONNECTION_STRING
        );
    }

    async fetch(publish, done) {
        // TODO: customize the container name and blob name to download
        // // More info at https://docs.microsoft.com/en-us/javascript/api/@azure/storage-blob/blobserviceclient?view=azure-node-latest#@azure-storage-blob-blobserviceclient-getcontainerclient
        const containerClient = this.azureBlob.getContainerClient("container-name");
        const blobClient = containerClient.getBlobClient("blob-name");
        const result = await blobClient.download();

        // result.readableStreamBody is a stream of object content

        result.readableStreamBody
            .pipe(ndjson.parse())
            .on("data", async (line) => {
                await publish(line);
            })
            .on("end", done);
    }

    async close() {}
}

class AwsS3TargetUploadCsv {
    async init() {
        // More info at https://www.npmjs.com/package/@aws-sdk/client-s3
        // TODO: Create team variables. More info at https://yepcode.io/docs/processes/team-variables
        this.awsS3 = new S3Client({
            region: yepcode.env.AWS_REGION,
            credentials: {
                accessKeyId: yepcode.env.AWS_ACCESS_KEY_ID,
                secretAccessKey: yepcode.env.AWS_SECRET_ACCESS_KEY,
            },
        });
        // Transforms the items into a csv format
        this.stringifier = csv.stringify({
            delimiter: ",",
        });
        this.targetStream = new PassThrough();
        this.stringifier.pipe(this.targetStream);
        // TODO: customize the Upload content
        // More info at: https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/interfaces/_aws_sdk_lib_storage.options-1.html
        this.upload = new Upload({
            client: this.awsS3,
            params: {
                Bucket: "your-bucket-name",
                Key: "your-file-name.csv",
                Body: this.targetStream,
            },
        });
        this.upload.on("httpUploadProgress", (progress) => {
            console.log(`Upload progress`, progress);
        });
        this.uploadPromise = this.upload.done();
    }

    async consume(item) {
        // TODO: customize the csv row to create from your item content
        const csvRow = [item.value, item.text];
        this.stringifier.write(csvRow);
    }

    async close() {
        try {
            this.stringifier.end();
        } catch (error) {
            console.error(`Error ending stringifier`, error);
        }
        try {
            await this.uploadPromise;
        } catch (error) {
            console.error(`Error ending upload`, error);
        }
    }
}