import { CreateXlsx } from "build";
import * as fs from "fs";

const xlsxTemplate = fs.readFileSync("template.xlsx").buffer;

const xlsx = new CreateXlsx();
xlsx.openTemplate(xlsxTemplate).then(xlsx => {
    const imageContent = fs.readFileSync("image.png").buffer;
    const variables = new Map();
    variables.set("IMAGE_1", imageContent);
    xlsx.replaceVariableImage(variables, "sheets");

    xlsx.save().then(contents => {
        fs.writeFileSync("replaceVariableImage_1.xlsx", Buffer.from(contents));
    });
});