Generate Atlas Sprites for Phaser using Node script

generate-atlas-files.js

/* eslint-disable import/no-extraneous-dependencies */
const { packAsync } = require('free-tex-packer-core');
const path = require('path');
const { readFileSync, readdirSync, writeFileSync } = require('fs');

const SOURCE_SPRITES_PATH = path.resolve(__dirname, 'original-files', 'sprites');
const SPRITES_PATH = path.resolve(__dirname, 'assets', 'sprites');

// TODO make it possible to generate only one new asset with `node generate-atlas-files.js assetName`
async function generateAtlasFiles(assetName = null) {
    const spritesFolders = await readdirSync(SOURCE_SPRITES_PATH);
    // eslint-disable-next-line no-restricted-syntax
    for (const spritesFolder of spritesFolders) {
        // eslint-disable-next-line no-await-in-loop
        const spritesFiles = await readdirSync(path.resolve(__dirname, SOURCE_SPRITES_PATH, spritesFolder));
        const images = [];
        spritesFiles.forEach((spritesFile) => {
            images.push({
                path: spritesFile,
                contents: readFileSync(
                    path.resolve(__dirname, SOURCE_SPRITES_PATH, spritesFolder, spritesFile)
                ),
            });
        });

        // eslint-disable-next-line no-await-in-loop
        await packImages(images, spritesFolder);
    }
}

async function packImages(images, spriteName) {
    try {
        const files = await packAsync(images, { allowRotation: false });
        // eslint-disable-next-line no-restricted-syntax
        for (const item of files) {
            const fileExt = item.name.split('.').pop();
            // eslint-disable-next-line no-await-in-loop
            await writeFileSync(
                path.resolve(__dirname, SPRITES_PATH, `${spriteName}.${fileExt}`),
                item.buffer
            );
        }
    } catch (error) {
        console.log(error);
    }
}

generateAtlasFiles();