@gechiui/block-editor/build-module/utils/transform-styles/transforms/url-rewrite.js

Generic block editor.

/**
 * Return `true` if the given path is http/https.
 *
 * @param {string} filePath path
 *
 * @return {boolean} is remote path.
 */
function isRemotePath(filePath) {
  return /^(?:https?:)?\/\//.test(filePath);
}
/**
 * Return `true` if the given filePath is an absolute url.
 *
 * @param {string} filePath path
 *
 * @return {boolean} is absolute path.
 */


function isAbsolutePath(filePath) {
  return /^\/(?!\/)/.test(filePath);
}
/**
 * Whether or not the url should be inluded.
 *
 * @param {Object} meta url meta info
 *
 * @return {boolean} is valid.
 */


function isValidURL(meta) {
  // ignore hashes or data uris
  if (meta.value.indexOf('data:') === 0 || meta.value.indexOf('#') === 0) {
    return false;
  }

  if (isAbsolutePath(meta.value)) {
    return false;
  } // do not handle the http/https urls if `includeRemote` is false


  if (isRemotePath(meta.value)) {
    return false;
  }

  return true;
}
/**
 * Get the absolute path of the url, relative to the basePath
 *
 * @param {string} str     the url
 * @param {string} baseURL base URL
 *
 * @return {string} the full path to the file
 */


function getResourcePath(str, baseURL) {
  return new URL(str, baseURL).toString();
}
/**
 * Process the single `url()` pattern
 *
 * @param {string} baseURL the base URL for relative URLs.
 *
 * @return {Promise} the Promise.
 */


function processURL(baseURL) {
  return meta => ({ ...meta,
    newUrl: 'url(' + meta.before + meta.quote + getResourcePath(meta.value, baseURL) + meta.quote + meta.after + ')'
  });
}
/**
 * Get all `url()`s, and return the meta info
 *
 * @param {string} value decl.value.
 *
 * @return {Array} the urls.
 */


function getURLs(value) {
  const reg = /url\((\s*)(['"]?)(.+?)\2(\s*)\)/g;
  let match;
  const URLs = [];

  while ((match = reg.exec(value)) !== null) {
    const meta = {
      source: match[0],
      before: match[1],
      quote: match[2],
      value: match[3],
      after: match[4]
    };

    if (isValidURL(meta)) {
      URLs.push(meta);
    }
  }

  return URLs;
}
/**
 * Replace the raw value's `url()` segment to the new value
 *
 * @param {string} raw  the raw value.
 * @param {Array}  URLs the URLs to replace.
 *
 * @return {string} the new value.
 */


function replaceURLs(raw, URLs) {
  URLs.forEach(item => {
    raw = raw.replace(item.source, item.newUrl);
  });
  return raw;
}

const rewrite = rootURL => node => {
  if (node.type === 'declaration') {
    const updatedURLs = getURLs(node.value).map(processURL(rootURL));
    return { ...node,
      value: replaceURLs(node.value, updatedURLs)
    };
  }

  return node;
};

export default rewrite;
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