@shockpkg/swf-projector/esm/util.mjs

import { inflateRaw } from 'node:zlib';
import { LAUNCHERS } from "./launchers.mjs";

/**
 * HTML encode.
 *
 * @param s Raw strings.
 * @param dq Double quotes.
 * @param sq Single quotes.
 * @returns Encoded strings.
 */
export function htmlEncode(s, dq = false, sq = false) {
  s = s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  if (dq) {
    s = s.replace(/"/g, '&quot;');
  }
  if (sq) {
    s = s.replace(/'/g, '&#39;');
  }
  return s;
}

/**
 * Trim dot slash from head of path.
 *
 * @param path Path string.
 * @returns Trimmed path.
 */
export function trimDotSlash(path) {
  return path.replace(/^(\.\/)+/, '');
}

/**
 * Find path relative from base, if base matches.
 *
 * @param path Path to match against.
 * @param start Search start.
 * @param nocase Match case-insensitive.
 * @returns Returns path, or null.
 */
export function pathRelativeBase(path, start, nocase = false) {
  const p = trimDotSlash(nocase ? path.toLowerCase() : path);
  const s = trimDotSlash(nocase ? start.toLowerCase() : start);
  if (p === s) {
    return '';
  }
  if (p.startsWith(`${s}/`)) {
    return path.substring(s.length + 1);
  }
  return null;
}

/**
 * Same as pathRelativeBase, but retuns true on a match, else false.
 *
 * @param path Path to match against.
 * @param start Search start.
 * @param nocase Match case-insensitive.
 * @returns Returns true on match, else false.
 */
export function pathRelativeBaseMatch(path, start, nocase = false) {
  return pathRelativeBase(path, start, nocase) !== null;
}

/**
 * Trim a file extenion.
 *
 * @param path File path.
 * @param ext File extension.
 * @param nocase Match case-insensitive.
 * @returns Path without file extension.
 */
export function trimExtension(path, ext, nocase = false) {
  const p = nocase ? path.toLowerCase() : path;
  const e = nocase ? ext.toLowerCase() : ext;
  return p.endsWith(e) ? path.substring(0, p.length - e.length) : path;
}

/**
 * Get launcher data for an ID.
 *
 * @param id Laucher ID.
 * @returns Launcher data.
 */
export async function launcher(id) {
  const b64 = LAUNCHERS[id];
  if (typeof b64 !== 'string') {
    throw new Error(`Invalid launcher id: ${id}`);
  }
  return new Promise((resolve, reject) => {
    inflateRaw(Buffer.from(b64, 'base64'), (err, data) => {
      if (err) {
        reject(err);
        return;
      }
      resolve(new Uint8Array(data.buffer, data.byteOffset, data.byteLength));
    });
  });
}
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