@openhps/core/dist/cjs/three/loaders/LoaderUtils.js

Open Hybrid Positioning System - Core component

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.LoaderUtils = void 0;
/**
 * A class with loader utility functions.
 */
class LoaderUtils {
  /**
   * Extracts the base URL from the given URL.
   *
   * @param {string} url -The URL to extract the base URL from.
   * @return {string} The extracted base URL.
   */
  static extractUrlBase(url) {
    const index = url.lastIndexOf('/');
    if (index === -1) return './';
    return url.slice(0, index + 1);
  }

  /**
   * Resolves relative URLs against the given path. Absolute paths, data urls,
   * and blob URLs will be returned as is. Invalid URLs will return an empty
   * string.
   *
   * @param {string} url -The URL to resolve.
   * @param {string} path - The base path for relative URLs to be resolved against.
   * @return {string} The resolved URL.
   */
  static resolveURL(url, path) {
    // Invalid URL
    if (typeof url !== 'string' || url === '') return '';

    // Host Relative URL
    if (/^https?:\/\//i.test(path) && /^\//.test(url)) {
      path = path.replace(/(^https?:\/\/[^\/]+).*/i, '$1');
    }

    // Absolute URL http://,https://,//
    if (/^(https?:)?\/\//i.test(url)) return url;

    // Data URI
    if (/^data:.*,.*$/i.test(url)) return url;

    // Blob URL
    if (/^blob:.*$/i.test(url)) return url;

    // Relative URL
    return path + url;
  }
}
exports.LoaderUtils = LoaderUtils;