Connect Zyte automatic extraction and Clickhouse in our serverless environment

class HttpSourceZyteAutomaticExtraction {
    async init() {
        // TODO: Create your http credential with zyte information:
        // More info at https://yepcode.io/docs/integrations/http/#credential-configuration
        // Get your Zyte API key following guide at: https://docs.zyte.com/automatic-extraction-get-started.html
        // baseUrl: https://autoextract.scrapinghub.com/v1
        // user: <your_automatic_extraction_api_key>
        // password: empty
        this.axiosClient = yepcode.integration.http(
            "your-http-zyte-credential-name"
        );
    }

    async fetch(publish, done) {
        // TODO: Customize your request checking the API documentation:
        // https://docs.zyte.com/automatic-extraction.html
        const payload = [
            // In this sample we'll use the product list extraction: https://docs.zyte.com/automatic-extraction/product-list.html
            // TODO: Other lists or single object extractions may be done changing this payload:
            //       articles, comments, job posting, real state, reviews
            {
                url: "http://books.toscrape.com/",
                pageType: "productList",
            },
        ];
        const {
            data
        } = await this.axiosClient.post("/extract", payload);

        if (data && data[0]) {
            // TODO: If retrieved list is not a productList, this attribute navigations should be changed
            // TODO: You may also keep on retrieving next paginations using information at data[0].productList.paginationNext
            for (const item of data[0].productList.products) {
                await publish(item);
            }
        }
        done();
    }

    async close() {}
}

class ClickhouseTargetInsert {
    async init() {
        // TODO: Create your clickhouse credential
        // More info at https://yepcode.io/docs/integrations/clickhouse/#credential-configuration
        this.clickhouse = yepcode.integration.clickhouse(
            "your-clickhouse-credential-name"
        );
        // TODO: customize your sql query
        // This opens insert stream for your table
        this.stream = new Stream.Readable({
            objectMode: true
        });
        this.ws = client.insert({
            table: "your_table_name",
            values: stream,
            format: "JSONCompactEachRow",
        });
    }

    async consume(item) {
        // TODO: Map your item to row
        this.stream.push(item);
    }

    async close() {
        // wait stream to finish
        this.stream.push(null);
        await this.ws;
        await this.clickhouse.close();
    }
}