@loaders.gl/textures/dist/lib/texture-api/async-deep-map.js

Framework-independent loaders for compressed and super compressed (basis) textures

// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
const isObject = (value) => value && typeof value === 'object';
// Loads a deep structure of urls (objects and arrays of urls)
// Returns an object with six key-value pairs containing the images (or image mip arrays)
// for each cube face
export async function asyncDeepMap(tree, func, options = {}) {
    return await mapSubtree(tree, func, options);
}
export async function mapSubtree(object, func, options) {
    if (Array.isArray(object)) {
        return await mapArray(object, func, options);
    }
    if (isObject(object)) {
        return await mapObject(object, func, options);
    }
    // TODO - ignore non-urls, non-arraybuffers?
    const url = object;
    return await func(url, options);
}
// HELPERS
async function mapObject(object, func, options) {
    const promises = [];
    const values = {};
    for (const key in object) {
        const url = object[key];
        const promise = mapSubtree(url, func, options).then((value) => {
            values[key] = value;
        });
        promises.push(promise);
    }
    await Promise.all(promises);
    return values;
}
async function mapArray(urlArray, func, options = {}) {
    const promises = urlArray.map((url) => mapSubtree(url, func, options));
    return await Promise.all(promises);
}