generate-document.js

import pkg from 'windwardrestapi';
import fs from "fs";
const {WindwardClient, Template, Xml_10DataSource, OutputFormatEnum} = pkg;

const config = JSON.parse(fs.readFileSync('./config.json'));

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
};

async function main()
{
    /**
     * Step 1: INITIALIZE THE RESTFUL CLIENT AND SET UP THE TEMPLATE AND DATA SOURCE
     * --------------------------------------------------------------------------------------------
     */
    console.log("Initializing Fluent RESTful Client...");

    // Create a new instance of the client using the RESTful Engine URL provided in the config file 
    // and pass the license to the client.  
    //
    // The license should be specified in the config file
    // If you don't have a license key, you can leave it blank and it will produce output with a watermark.
    let client = new WindwardClient.WindwardClient(config['restful-engine-url'], config['license']);
    
    // Display the version info for the restful engine
    let version = await client.getVersionInfo();
    console.log("Fluent RESTFul Engine Version: ", version);

    // The datasource document I am sending to the engine to be processed
    const dataSourcePath = './files/InvestmentFactSheet.xml';

    // Create the object and pass in the datasource name, and the data file path.
    let dataSource = new Xml_10DataSource('InvestmentFactSheet', undefined, dataSourcePath, undefined);
 
    //The template file I wish to process.
    const templatePath = './files/InvestmentFactSheet.docx';

    //Create a new template object (to see all the input params check the documentation)
    let template = new Template(OutputFormatEnum.PDF, [dataSource], undefined, templatePath,
        undefined, undefined, undefined, undefined, undefined, undefined,
        undefined, undefined, undefined, undefined, undefined, undefined);

    /**
     * Step 2: GENERATE THE DOCUMENT
     * --------------------------------------------------------------------------------------------
     */
    console.log("Generating Document...");

    // Post document to the engine for processing
    let document = await client.postDocument(template);
    
    //check postDocument status and wait if not ready.
    let documentReady = false;
    while(true) {
        await sleep(1000);
        let status = await client.getDocumentStatus(document.Guid);
        if (status == 302) {
            // The document generation is complete, we can now proceed to retrieve the generated document
            documentReady = true;
            break;
        }
        else if (status == 201 || status == 202 || status == 404) {
            // The document generation is still in progress, continue waiting
            continue;
        }
        else {
            // The document generation failed
            console.error("Error retrieving document. Status code: ", status);
            break;
        }
    }

    if (!documentReady) {
        console.error("Document generation did not complete successfully. Skipping retrieval.");
        return;
    }

    /**
     * Step 3: RETRIEVE THE DOCUMENT
     * --------------------------------------------------------------------------------------------
     */
    console.log("Retrieving Document...");

    // Retrieve the generated document
    let generatedDocument = await client.getDocument(document.Guid);

    // Write the processed document to a file (ensure the file format matches the output format specified in the template)
    fs.writeFile("./files/output.pdf", Buffer.from(generatedDocument.Data, "base64"), function(err){});
    console.log("Generated document saved to /files/output.pdf");

    // Delete the processed document from the engine
    await client.deleteDocument(generatedDocument.Guid);
}

// Execute the main() method
main();