@loaders.gl/zip/dist/index.cjs

Zip Archive Loader

"use strict";
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// dist/index.js
var dist_exports = {};
__export(dist_exports, {
  CD_HEADER_SIGNATURE: () => signature2,
  IndexedArchive: () => IndexedArchive,
  TarBuilder: () => TarBuilder,
  ZIP_COMPRESSION_HANDLERS: () => ZIP_COMPRESSION_HANDLERS,
  ZipFileSystem: () => ZipFileSystem,
  ZipLoader: () => ZipLoader,
  ZipWriter: () => ZipWriter,
  addOneFile: () => addOneFile,
  composeHashFile: () => composeHashFile,
  createZip: () => createZip,
  generateCDHeader: () => generateCDHeader,
  generateLocalHeader: () => generateLocalHeader,
  localHeaderSignature: () => signature3,
  makeHashTableFromZipHeaders: () => makeHashTableFromZipHeaders,
  makeZipCDHeaderIterator: () => makeZipCDHeaderIterator,
  parseEoCDRecord: () => parseEoCDRecord,
  parseHashTable: () => parseHashTable,
  parseZipCDFileHeader: () => parseZipCDFileHeader,
  parseZipLocalFileHeader: () => parseZipLocalFileHeader,
  searchFromTheEnd: () => searchFromTheEnd
});
module.exports = __toCommonJS(dist_exports);

// dist/zip-loader.js
var import_jszip = __toESM(require("jszip"), 1);
var VERSION = true ? "4.3.3" : "latest";
var ZipLoader = {
  dataType: null,
  batchType: null,
  id: "zip",
  module: "zip",
  name: "Zip Archive",
  version: VERSION,
  extensions: ["zip"],
  mimeTypes: ["application/zip"],
  category: "archive",
  tests: ["PK"],
  options: {},
  parse: parseZipAsync
};
async function parseZipAsync(data, options = {}) {
  const promises = [];
  const fileMap = {};
  try {
    const jsZip = new import_jszip.default();
    const zip = await jsZip.loadAsync(data, options);
    zip.forEach((relativePath, zipEntry) => {
      const subFilename = zipEntry.name;
      const promise = loadZipEntry(jsZip, subFilename, options).then((arrayBufferOrError) => {
        fileMap[relativePath] = arrayBufferOrError;
      });
      promises.push(promise);
    });
    await Promise.all(promises);
    return fileMap;
  } catch (error) {
    options.log.error(`Unable to read zip archive: ${error}`);
    throw error;
  }
}
async function loadZipEntry(jsZip, subFilename, options = {}) {
  try {
    const arrayBuffer = await jsZip.file(subFilename).async(options.dataType || "arraybuffer");
    return arrayBuffer;
  } catch (error) {
    options.log.error(`Unable to read ${subFilename} from zip archive: ${error}`);
    return error;
  }
}

// dist/zip-writer.js
var import_jszip2 = __toESM(require("jszip"), 1);
var VERSION2 = true ? "4.3.3" : "latest";
var ZipWriter = {
  name: "Zip Archive",
  id: "zip",
  module: "zip",
  version: VERSION2,
  extensions: ["zip"],
  category: "archive",
  mimeTypes: ["application/zip"],
  options: {
    zip: {
      onUpdate: () => {
      }
    },
    jszip: {}
  },
  encode: encodeZipAsync
};
async function encodeZipAsync(fileMap, options = {}) {
  var _a;
  const jsZip = new import_jszip2.default();
  for (const subFileName in fileMap) {
    const subFileData = fileMap[subFileName];
    jsZip.file(subFileName, subFileData, (options == null ? void 0 : options.jszip) || {});
  }
  const zipOptions = { ...ZipWriter.options.zip, ...options == null ? void 0 : options.zip };
  const jszipOptions = { ...(_a = ZipWriter.options) == null ? void 0 : _a.jszip, ...options.jszip };
  try {
    return await jsZip.generateAsync(
      { ...jszipOptions, type: "arraybuffer" },
      // generate an arraybuffer
      zipOptions.onUpdate
    );
  } catch (error) {
    options.log.error(`Unable to encode zip archive: ${error}`);
    throw error;
  }
}

// dist/lib/tar/utils.js
function clean(length) {
  let i;
  const buffer = new Uint8Array(length);
  for (i = 0; i < length; i += 1) {
    buffer[i] = 0;
  }
  return buffer;
}
function pad(num, bytes, base) {
  const numStr = num.toString(base || 8);
  return "000000000000".substr(numStr.length + 12 - bytes) + numStr;
}
function stringToUint8(input, out, offset) {
  let i;
  let length;
  out = out || clean(input.length);
  offset = offset || 0;
  for (i = 0, length = input.length; i < length; i += 1) {
    out[offset] = input.charCodeAt(i);
    offset += 1;
  }
  return out;
}

// dist/lib/tar/header.js
var structure = {
  fileName: 100,
  fileMode: 8,
  uid: 8,
  gid: 8,
  fileSize: 12,
  mtime: 12,
  checksum: 8,
  type: 1,
  linkName: 100,
  ustar: 8,
  owner: 32,
  group: 32,
  majorNumber: 8,
  minorNumber: 8,
  filenamePrefix: 155,
  padding: 12
};
function format(data, cb) {
  const buffer = clean(512);
  let offset = 0;
  Object.entries(structure).forEach(([field, length]) => {
    const str = data[field] || "";
    let i;
    let fieldLength;
    for (i = 0, fieldLength = str.length; i < fieldLength; i += 1) {
      buffer[offset] = str.charCodeAt(i);
      offset += 1;
    }
    offset += length - i;
  });
  if (typeof cb === "function") {
    return cb(buffer, offset);
  }
  return buffer;
}

// dist/lib/tar/tar.js
var blockSize;
var headerLength;
var inputLength;
var recordSize = 512;
var Tar = class {
  written;
  out;
  blocks = [];
  length;
  /**
   * @param [recordsPerBlock]
   */
  constructor(recordsPerBlock) {
    this.written = 0;
    blockSize = (recordsPerBlock || 20) * recordSize;
    this.out = clean(blockSize);
    this.blocks = [];
    this.length = 0;
    this.save = this.save.bind(this);
    this.clear = this.clear.bind(this);
    this.append = this.append.bind(this);
  }
  /**
   * Append a file to the tar archive
   * @param filepath
   * @param input
   * @param [opts]
   */
  // eslint-disable-next-line complexity
  append(filepath, input, opts) {
    let checksum;
    if (typeof input === "string") {
      input = stringToUint8(input);
    } else if (input.constructor && input.constructor !== Uint8Array.prototype.constructor) {
      const errorInputMatch = /function\s*([$A-Za-z_][0-9A-Za-z_]*)\s*\(/.exec(input.constructor.toString());
      const errorInput = errorInputMatch && errorInputMatch[1];
      const errorMessage = `Invalid input type. You gave me: ${errorInput}`;
      throw errorMessage;
    }
    opts = opts || {};
    const mode = opts.mode || parseInt("777", 8) & 4095;
    const mtime = opts.mtime || Math.floor(Number(new Date()) / 1e3);
    const uid = opts.uid || 0;
    const gid = opts.gid || 0;
    const data = {
      fileName: filepath,
      fileMode: pad(mode, 7),
      uid: pad(uid, 7),
      gid: pad(gid, 7),
      fileSize: pad(input.length, 11),
      mtime: pad(mtime, 11),
      checksum: "        ",
      // 0 = just a file
      type: "0",
      ustar: "ustar  ",
      owner: opts.owner || "",
      group: opts.group || ""
    };
    checksum = 0;
    Object.keys(data).forEach((key) => {
      let i;
      const value = data[key];
      let length;
      for (i = 0, length = value.length; i < length; i += 1) {
        checksum += value.charCodeAt(i);
      }
    });
    data.checksum = `${pad(checksum, 6)}\0 `;
    const headerArr = format(data);
    headerLength = Math.ceil(headerArr.length / recordSize) * recordSize;
    inputLength = Math.ceil(input.length / recordSize) * recordSize;
    this.blocks.push({
      header: headerArr,
      input,
      headerLength,
      inputLength
    });
  }
  /**
   * Compiling data to a Blob object
   * @returns {Blob}
   */
  save() {
    const buffers = [];
    const chunks = new Array();
    let length = 0;
    const max = Math.pow(2, 20);
    let chunk = new Array();
    this.blocks.forEach((b = []) => {
      if (length + b.headerLength + b.inputLength > max) {
        chunks.push({ blocks: chunk, length });
        chunk = [];
        length = 0;
      }
      chunk.push(b);
      length += b.headerLength + b.inputLength;
    });
    chunks.push({ blocks: chunk, length });
    chunks.forEach((c = []) => {
      const buffer = new Uint8Array(c.length);
      let written = 0;
      c.blocks.forEach((b = []) => {
        buffer.set(b.header, written);
        written += b.headerLength;
        buffer.set(b.input, written);
        written += b.inputLength;
      });
      buffers.push(buffer);
    });
    buffers.push(new Uint8Array(2 * recordSize));
    return new Blob(buffers, { type: "octet/stream" });
  }
  /**
   * Clear the data by its blocksize
   */
  clear() {
    this.written = 0;
    this.out = clean(blockSize);
  }
};
var tar_default = Tar;

// dist/tar-builder.js
var TAR_BUILDER_OPTIONS = {
  recordsPerBlock: 20
};
var TarBuilder = class {
  static get properties() {
    return {
      id: "tar",
      name: "TAR",
      extensions: ["tar"],
      mimeTypes: ["application/x-tar"],
      builder: TarBuilder,
      options: TAR_BUILDER_OPTIONS
    };
  }
  options;
  tape;
  count = 0;
  constructor(options) {
    this.options = { ...TAR_BUILDER_OPTIONS, ...options };
    this.tape = new tar_default(this.options.recordsPerBlock);
  }
  /** Adds a file to the archive. */
  addFile(filename, buffer) {
    this.tape.append(filename, new Uint8Array(buffer));
    this.count++;
  }
  async build() {
    return new Response(this.tape.save()).arrayBuffer();
  }
};

// dist/parse-zip/cd-file-header.js
var import_loader_utils3 = require("@loaders.gl/loader-utils");

// dist/parse-zip/end-of-central-directory.js
var import_loader_utils2 = require("@loaders.gl/loader-utils");

// dist/parse-zip/search-from-the-end.js
var buffLength = 1024;
var searchFromTheEnd = async (file, target) => {
  const searchWindow = [
    await file.getUint8(file.length - 1n),
    await file.getUint8(file.length - 2n),
    await file.getUint8(file.length - 3n),
    void 0
  ];
  let targetOffset = -1;
  let point = file.length - 4n;
  do {
    const prevPoint = point;
    point -= BigInt(buffLength);
    point = point >= 0n ? point : 0n;
    const buff = new Uint8Array(await file.slice(point, prevPoint));
    for (let i = buff.length - 1; i > -1; i--) {
      searchWindow[3] = searchWindow[2];
      searchWindow[2] = searchWindow[1];
      searchWindow[1] = searchWindow[0];
      searchWindow[0] = buff[i];
      if (searchWindow.every((val, index) => val === target[index])) {
        targetOffset = i;
        break;
      }
    }
  } while (targetOffset === -1 && point > 0n);
  return point + BigInt(targetOffset);
};

// dist/parse-zip/zip64-info-generation.js
var import_loader_utils = require("@loaders.gl/loader-utils");
var signature = new Uint8Array([1, 0]);
function createZip64Info(options) {
  const optionsToUse = {
    ...options,
    zip64Length: (options.offset ? 1 : 0) * 8 + (options.size ? 1 : 0) * 16
  };
  const arraysToConcat = [];
  for (const field of ZIP64_FIELDS) {
    if (!optionsToUse[field.name ?? ""] && !field.default) {
      continue;
    }
    const newValue = new DataView(new ArrayBuffer(field.size));
    NUMBER_SETTERS[field.size](newValue, 0, optionsToUse[field.name ?? ""] ?? field.default);
    arraysToConcat.push(newValue.buffer);
  }
  return (0, import_loader_utils.concatenateArrayBuffers)(...arraysToConcat);
}
function setFieldToNumber(header, fieldSize, fieldOffset, value) {
  NUMBER_SETTERS[fieldSize](header, Number(fieldOffset), value);
}
var NUMBER_SETTERS = {
  2: (header, offset, value) => {
    header.setUint16(offset, Number(value > 65535 ? 65535 : value), true);
  },
  4: (header, offset, value) => {
    header.setUint32(offset, Number(value > 4294967295 ? 4294967295 : value), true);
  },
  8: (header, offset, value) => {
    header.setBigUint64(offset, BigInt(value), true);
  }
};
var ZIP64_FIELDS = [
  // Header ID 0x0001
  {
    size: 2,
    default: new DataView(signature.buffer).getUint16(0, true)
  },
  // Size of the extra field chunk (8, 16, 24 or 28)
  {
    size: 2,
    name: "zip64Length"
  },
  // Original uncompressed file size
  {
    size: 8,
    name: "size"
  },
  // Size of compressed data
  {
    size: 8,
    name: "size"
  },
  // Offset of local header record
  {
    size: 8,
    name: "offset"
  }
];

// dist/parse-zip/end-of-central-directory.js
var eoCDSignature = new Uint8Array([80, 75, 5, 6]);
var zip64EoCDLocatorSignature = new Uint8Array([80, 75, 6, 7]);
var zip64EoCDSignature = new Uint8Array([80, 75, 6, 6]);
var CD_RECORDS_NUMBER_OFFSET = 8n;
var CD_RECORDS_NUMBER_ON_DISC_OFFSET = 10n;
var CD_CD_BYTE_SIZE_OFFSET = 12n;
var CD_START_OFFSET_OFFSET = 16n;
var CD_COMMENT_OFFSET = 22n;
var ZIP64_EOCD_START_OFFSET_OFFSET = 8n;
var ZIP64_CD_RECORDS_NUMBER_OFFSET = 24n;
var ZIP64_CD_RECORDS_NUMBER_ON_DISC_OFFSET = 32n;
var ZIP64_CD_CD_BYTE_SIZE_OFFSET = 40n;
var ZIP64_CD_START_OFFSET_OFFSET = 48n;
var ZIP64_COMMENT_OFFSET = 56n;
var parseEoCDRecord = async (file) => {
  const zipEoCDOffset = await searchFromTheEnd(file, eoCDSignature);
  let cdRecordsNumber = BigInt(await file.getUint16(zipEoCDOffset + CD_RECORDS_NUMBER_OFFSET));
  let cdByteSize = BigInt(await file.getUint32(zipEoCDOffset + CD_CD_BYTE_SIZE_OFFSET));
  let cdStartOffset = BigInt(await file.getUint32(zipEoCDOffset + CD_START_OFFSET_OFFSET));
  let zip64EoCDLocatorOffset = zipEoCDOffset - 20n;
  let zip64EoCDOffset = 0n;
  const magicBytes = await file.slice(zip64EoCDLocatorOffset, zip64EoCDLocatorOffset + 4n);
  if ((0, import_loader_utils2.compareArrayBuffers)(magicBytes, zip64EoCDLocatorSignature)) {
    zip64EoCDOffset = await file.getBigUint64(zip64EoCDLocatorOffset + ZIP64_EOCD_START_OFFSET_OFFSET);
    const endOfCDMagicBytes = await file.slice(zip64EoCDOffset, zip64EoCDOffset + 4n);
    if (!(0, import_loader_utils2.compareArrayBuffers)(endOfCDMagicBytes, zip64EoCDSignature.buffer)) {
      throw new Error("zip64 EoCD not found");
    }
    cdRecordsNumber = await file.getBigUint64(zip64EoCDOffset + ZIP64_CD_RECORDS_NUMBER_OFFSET);
    cdByteSize = await file.getBigUint64(zip64EoCDOffset + ZIP64_CD_CD_BYTE_SIZE_OFFSET);
    cdStartOffset = await file.getBigUint64(zip64EoCDOffset + ZIP64_CD_START_OFFSET_OFFSET);
  } else {
    zip64EoCDLocatorOffset = 0n;
  }
  return {
    cdRecordsNumber,
    cdStartOffset,
    cdByteSize,
    offsets: {
      zip64EoCDOffset,
      zip64EoCDLocatorOffset,
      zipEoCDOffset
    }
  };
};
function updateEoCD(eocdBody, oldEoCDOffsets, newCDStartOffset, eocdStartOffset, newCDRecordsNumber) {
  const eocd = new DataView(eocdBody);
  const classicEoCDOffset = oldEoCDOffsets.zip64EoCDOffset ? oldEoCDOffsets.zipEoCDOffset - oldEoCDOffsets.zip64EoCDOffset : 0n;
  if (Number(newCDRecordsNumber) <= 65535) {
    setFieldToNumber(eocd, 2, classicEoCDOffset + CD_RECORDS_NUMBER_OFFSET, newCDRecordsNumber);
    setFieldToNumber(eocd, 2, classicEoCDOffset + CD_RECORDS_NUMBER_ON_DISC_OFFSET, newCDRecordsNumber);
  }
  if (eocdStartOffset - newCDStartOffset <= 4294967295) {
    setFieldToNumber(eocd, 4, classicEoCDOffset + CD_CD_BYTE_SIZE_OFFSET, eocdStartOffset - newCDStartOffset);
  }
  if (newCDStartOffset < 4294967295) {
    setFieldToNumber(eocd, 4, classicEoCDOffset + CD_START_OFFSET_OFFSET, newCDStartOffset);
  }
  if (oldEoCDOffsets.zip64EoCDLocatorOffset && oldEoCDOffsets.zip64EoCDOffset) {
    const locatorOffset = oldEoCDOffsets.zip64EoCDLocatorOffset - oldEoCDOffsets.zip64EoCDOffset;
    setFieldToNumber(eocd, 8, locatorOffset + ZIP64_EOCD_START_OFFSET_OFFSET, eocdStartOffset);
    setFieldToNumber(eocd, 8, ZIP64_CD_START_OFFSET_OFFSET, newCDStartOffset);
    setFieldToNumber(eocd, 8, ZIP64_CD_RECORDS_NUMBER_OFFSET, newCDRecordsNumber);
    setFieldToNumber(eocd, 8, ZIP64_CD_RECORDS_NUMBER_ON_DISC_OFFSET, newCDRecordsNumber);
    setFieldToNumber(eocd, 8, ZIP64_CD_CD_BYTE_SIZE_OFFSET, eocdStartOffset - newCDStartOffset);
  }
  return new Uint8Array(eocd.buffer);
}
function generateEoCD(options) {
  const header = new DataView(new ArrayBuffer(Number(CD_COMMENT_OFFSET)));
  for (const field of EOCD_FIELDS) {
    setFieldToNumber(header, field.size, field.offset, options[field.name ?? ""] ?? field.default ?? 0);
  }
  const locator = generateZip64InfoLocator(options);
  const zip64Record = generateZip64Info(options);
  return (0, import_loader_utils2.concatenateArrayBuffers)(zip64Record, locator, header.buffer);
}
var EOCD_FIELDS = [
  // End of central directory signature = 0x06054b50
  {
    offset: 0,
    size: 4,
    default: new DataView(eoCDSignature.buffer).getUint32(0, true)
  },
  // Number of this disk (or 0xffff for ZIP64)
  {
    offset: 4,
    size: 2,
    default: 0
  },
  // Disk where central directory starts (or 0xffff for ZIP64)
  {
    offset: 6,
    size: 2,
    default: 0
  },
  // Number of central directory records on this disk (or 0xffff for ZIP64)
  {
    offset: 8,
    size: 2,
    name: "recordsNumber"
  },
  // Total number of central directory records (or 0xffff for ZIP64)
  {
    offset: 10,
    size: 2,
    name: "recordsNumber"
  },
  // Size of central directory (bytes) (or 0xffffffff for ZIP64)
  {
    offset: 12,
    size: 4,
    name: "cdSize"
  },
  // Offset of start of central directory, relative to start of archive (or 0xffffffff for ZIP64)
  {
    offset: 16,
    size: 4,
    name: "cdOffset"
  },
  // Comment length (n)
  {
    offset: 20,
    size: 2,
    default: 0
  }
];
function generateZip64Info(options) {
  const record = new DataView(new ArrayBuffer(Number(ZIP64_COMMENT_OFFSET)));
  for (const field of ZIP64_EOCD_FIELDS) {
    setFieldToNumber(record, field.size, field.offset, options[field.name ?? ""] ?? field.default ?? 0);
  }
  return record.buffer;
}
function generateZip64InfoLocator(options) {
  const locator = new DataView(new ArrayBuffer(Number(20)));
  for (const field of ZIP64_EOCD_LOCATOR_FIELDS) {
    setFieldToNumber(locator, field.size, field.offset, options[field.name ?? ""] ?? field.default ?? 0);
  }
  return locator.buffer;
}
var ZIP64_EOCD_LOCATOR_FIELDS = [
  // zip64 end of central dir locator signature
  {
    offset: 0,
    size: 4,
    default: new DataView(zip64EoCDLocatorSignature.buffer).getUint32(0, true)
  },
  // number of the disk with the start of the zip64 end of
  {
    offset: 4,
    size: 4,
    default: 0
  },
  // start of the zip64 end of central directory
  {
    offset: 8,
    size: 8,
    name: "eoCDStart"
  },
  // total number of disks
  {
    offset: 16,
    size: 4,
    default: 1
  }
];
var ZIP64_EOCD_FIELDS = [
  // End of central directory signature = 0x06064b50
  {
    offset: 0,
    size: 4,
    default: new DataView(zip64EoCDSignature.buffer).getUint32(0, true)
  },
  // Size of the EOCD64 minus 12
  {
    offset: 4,
    size: 8,
    default: 44
  },
  // Version made by
  {
    offset: 12,
    size: 2,
    default: 45
  },
  // Version needed to extract (minimum)
  {
    offset: 14,
    size: 2,
    default: 45
  },
  // Number of this disk
  {
    offset: 16,
    size: 4,
    default: 0
  },
  // Disk where central directory starts
  {
    offset: 20,
    size: 4,
    default: 0
  },
  // Number of central directory records on this disk
  {
    offset: 24,
    size: 8,
    name: "recordsNumber"
  },
  // Total number of central directory records
  {
    offset: 32,
    size: 8,
    name: "recordsNumber"
  },
  // Size of central directory (bytes)
  {
    offset: 40,
    size: 8,
    name: "cdSize"
  },
  // Offset of start of central directory, relative to start of archive
  {
    offset: 48,
    size: 8,
    name: "cdOffset"
  }
];

// dist/parse-zip/cd-file-header.js
var CD_COMPRESSED_SIZE_OFFSET = 20;
var CD_UNCOMPRESSED_SIZE_OFFSET = 24;
var CD_FILE_NAME_LENGTH_OFFSET = 28;
var CD_EXTRA_FIELD_LENGTH_OFFSET = 30;
var CD_START_DISK_OFFSET = 32;
var CD_LOCAL_HEADER_OFFSET_OFFSET = 42;
var CD_FILE_NAME_OFFSET = 46n;
var signature2 = new Uint8Array([80, 75, 1, 2]);
var parseZipCDFileHeader = async (headerOffset, file) => {
  if (headerOffset >= file.length) {
    return null;
  }
  const mainHeader = new DataView(await file.slice(headerOffset, headerOffset + CD_FILE_NAME_OFFSET));
  const magicBytes = mainHeader.buffer.slice(0, 4);
  if (!(0, import_loader_utils3.compareArrayBuffers)(magicBytes, signature2.buffer)) {
    return null;
  }
  const compressedSize = BigInt(mainHeader.getUint32(CD_COMPRESSED_SIZE_OFFSET, true));
  const uncompressedSize = BigInt(mainHeader.getUint32(CD_UNCOMPRESSED_SIZE_OFFSET, true));
  const extraFieldLength = mainHeader.getUint16(CD_EXTRA_FIELD_LENGTH_OFFSET, true);
  const startDisk = BigInt(mainHeader.getUint16(CD_START_DISK_OFFSET, true));
  const fileNameLength = mainHeader.getUint16(CD_FILE_NAME_LENGTH_OFFSET, true);
  const additionalHeader = await file.slice(headerOffset + CD_FILE_NAME_OFFSET, headerOffset + CD_FILE_NAME_OFFSET + BigInt(fileNameLength + extraFieldLength));
  const filenameBytes = additionalHeader.slice(0, fileNameLength);
  const fileName = new TextDecoder().decode(filenameBytes);
  const extraOffset = headerOffset + CD_FILE_NAME_OFFSET + BigInt(fileNameLength);
  const oldFormatOffset = mainHeader.getUint32(CD_LOCAL_HEADER_OFFSET_OFFSET, true);
  const localHeaderOffset = BigInt(oldFormatOffset);
  const extraField = new DataView(additionalHeader.slice(fileNameLength, additionalHeader.byteLength));
  const zip64data = {
    uncompressedSize,
    compressedSize,
    localHeaderOffset,
    startDisk
  };
  const res = findZip64DataInExtra(zip64data, extraField);
  return {
    ...zip64data,
    ...res,
    extraFieldLength,
    fileNameLength,
    fileName,
    extraOffset
  };
};
async function* makeZipCDHeaderIterator(fileProvider) {
  const { cdStartOffset, cdByteSize } = await parseEoCDRecord(fileProvider);
  const centralDirectory = new import_loader_utils3.DataViewFile(new DataView(await fileProvider.slice(cdStartOffset, cdStartOffset + cdByteSize)));
  let cdHeader = await parseZipCDFileHeader(0n, centralDirectory);
  while (cdHeader) {
    yield cdHeader;
    cdHeader = await parseZipCDFileHeader(cdHeader.extraOffset + BigInt(cdHeader.extraFieldLength), centralDirectory);
  }
}
var getUint16 = (...bytes) => {
  return bytes[0] + bytes[1] * 16;
};
var findZip64DataInExtra = (zip64data, extraField) => {
  const zip64dataList = findExpectedData(zip64data);
  const zip64DataRes = {};
  if (zip64dataList.length > 0) {
    const zip64chunkSize = zip64dataList.reduce((sum, curr) => sum + curr.length, 0);
    const offsetInExtraData = new Uint8Array(extraField.buffer).findIndex((_val, i, arr) => getUint16(arr[i], arr[i + 1]) === 1 && getUint16(arr[i + 2], arr[i + 3]) === zip64chunkSize);
    let bytesRead = 0;
    for (const note of zip64dataList) {
      const offset = bytesRead;
      zip64DataRes[note.name] = extraField.getBigUint64(offsetInExtraData + 4 + offset, true);
      bytesRead = offset + note.length;
    }
  }
  return zip64DataRes;
};
var findExpectedData = (zip64data) => {
  const zip64dataList = [];
  if (zip64data.uncompressedSize === BigInt(4294967295)) {
    zip64dataList.push({ name: "uncompressedSize", length: 8 });
  }
  if (zip64data.compressedSize === BigInt(4294967295)) {
    zip64dataList.push({ name: "compressedSize", length: 8 });
  }
  if (zip64data.localHeaderOffset === BigInt(4294967295)) {
    zip64dataList.push({ name: "localHeaderOffset", length: 8 });
  }
  if (zip64data.startDisk === BigInt(4294967295)) {
    zip64dataList.push({ name: "startDisk", length: 4 });
  }
  return zip64dataList;
};
function generateCDHeader(options) {
  const optionsToUse = {
    ...options,
    fnlength: options.fileName.length,
    extraLength: 0
  };
  let zip64header = new ArrayBuffer(0);
  const optionsToZip64 = {};
  if (optionsToUse.offset >= 4294967295) {
    optionsToZip64.offset = optionsToUse.offset;
    optionsToUse.offset = BigInt(4294967295);
  }
  if (optionsToUse.length >= 4294967295) {
    optionsToZip64.size = optionsToUse.length;
    optionsToUse.length = 4294967295;
  }
  if (Object.keys(optionsToZip64).length) {
    zip64header = createZip64Info(optionsToZip64);
    optionsToUse.extraLength = zip64header.byteLength;
  }
  const header = new DataView(new ArrayBuffer(Number(CD_FILE_NAME_OFFSET)));
  for (const field of ZIP_HEADER_FIELDS) {
    setFieldToNumber(header, field.size, field.offset, optionsToUse[field.name ?? ""] ?? field.default ?? 0);
  }
  const encodedName = new TextEncoder().encode(optionsToUse.fileName);
  const resHeader = (0, import_loader_utils3.concatenateArrayBuffers)(header.buffer, encodedName, zip64header);
  return resHeader;
}
var ZIP_HEADER_FIELDS = [
  // Central directory file header signature = 0x02014b50
  {
    offset: 0,
    size: 4,
    default: new DataView(signature2.buffer).getUint32(0, true)
  },
  // Version made by
  {
    offset: 4,
    size: 2,
    default: 45
  },
  // Version needed to extract (minimum)
  {
    offset: 6,
    size: 2,
    default: 45
  },
  // General purpose bit flag
  {
    offset: 8,
    size: 2,
    default: 0
  },
  // Compression method
  {
    offset: 10,
    size: 2,
    default: 0
  },
  // File last modification time
  {
    offset: 12,
    size: 2,
    default: 0
  },
  // File last modification date
  {
    offset: 14,
    size: 2,
    default: 0
  },
  // CRC-32 of uncompressed data
  {
    offset: 16,
    size: 4,
    name: "crc32"
  },
  // Compressed size (or 0xffffffff for ZIP64)
  {
    offset: 20,
    size: 4,
    name: "length"
  },
  // Uncompressed size (or 0xffffffff for ZIP64)
  {
    offset: 24,
    size: 4,
    name: "length"
  },
  // File name length (n)
  {
    offset: 28,
    size: 2,
    name: "fnlength"
  },
  // Extra field length (m)
  {
    offset: 30,
    size: 2,
    default: 0,
    name: "extraLength"
  },
  // File comment length (k)
  {
    offset: 32,
    size: 2,
    default: 0
  },
  // Disk number where file starts (or 0xffff for ZIP64)
  {
    offset: 34,
    size: 2,
    default: 0
  },
  // Internal file attributes
  {
    offset: 36,
    size: 2,
    default: 0
  },
  // External file attributes
  {
    offset: 38,
    size: 4,
    default: 0
  },
  // Relative offset of local file header
  {
    offset: 42,
    size: 4,
    name: "offset"
  }
];

// dist/parse-zip/local-file-header.js
var import_loader_utils4 = require("@loaders.gl/loader-utils");
var COMPRESSION_METHOD_OFFSET = 8;
var COMPRESSED_SIZE_OFFSET = 18;
var UNCOMPRESSED_SIZE_OFFSET = 22;
var FILE_NAME_LENGTH_OFFSET = 26;
var EXTRA_FIELD_LENGTH_OFFSET = 28;
var FILE_NAME_OFFSET = 30n;
var signature3 = new Uint8Array([80, 75, 3, 4]);
var parseZipLocalFileHeader = async (headerOffset, file) => {
  const mainHeader = new DataView(await file.slice(headerOffset, headerOffset + FILE_NAME_OFFSET));
  const magicBytes = mainHeader.buffer.slice(0, 4);
  if (!(0, import_loader_utils4.compareArrayBuffers)(magicBytes, signature3)) {
    return null;
  }
  const fileNameLength = mainHeader.getUint16(FILE_NAME_LENGTH_OFFSET, true);
  const extraFieldLength = mainHeader.getUint16(EXTRA_FIELD_LENGTH_OFFSET, true);
  const additionalHeader = await file.slice(headerOffset + FILE_NAME_OFFSET, headerOffset + FILE_NAME_OFFSET + BigInt(fileNameLength + extraFieldLength));
  const fileNameBuffer = additionalHeader.slice(0, fileNameLength);
  const extraDataBuffer = new DataView(additionalHeader.slice(fileNameLength, additionalHeader.byteLength));
  const fileName = new TextDecoder().decode(fileNameBuffer).split("\\").join("/");
  let fileDataOffset = headerOffset + FILE_NAME_OFFSET + BigInt(fileNameLength + extraFieldLength);
  const compressionMethod = mainHeader.getUint16(COMPRESSION_METHOD_OFFSET, true);
  let compressedSize = BigInt(mainHeader.getUint32(COMPRESSED_SIZE_OFFSET, true));
  let uncompressedSize = BigInt(mainHeader.getUint32(UNCOMPRESSED_SIZE_OFFSET, true));
  let offsetInZip64Data = 4;
  if (uncompressedSize === BigInt(4294967295)) {
    uncompressedSize = extraDataBuffer.getBigUint64(offsetInZip64Data, true);
    offsetInZip64Data += 8;
  }
  if (compressedSize === BigInt(4294967295)) {
    compressedSize = extraDataBuffer.getBigUint64(offsetInZip64Data, true);
    offsetInZip64Data += 8;
  }
  if (fileDataOffset === BigInt(4294967295)) {
    fileDataOffset = extraDataBuffer.getBigUint64(offsetInZip64Data, true);
  }
  return {
    fileNameLength,
    fileName,
    extraFieldLength,
    fileDataOffset,
    compressedSize,
    compressionMethod
  };
};
function generateLocalHeader(options) {
  const optionsToUse = {
    ...options,
    extraLength: 0,
    fnlength: options.fileName.length
  };
  let zip64header = new ArrayBuffer(0);
  const optionsToZip64 = {};
  if (optionsToUse.length >= 4294967295) {
    optionsToZip64.size = optionsToUse.length;
    optionsToUse.length = 4294967295;
  }
  if (Object.keys(optionsToZip64).length) {
    zip64header = createZip64Info(optionsToZip64);
    optionsToUse.extraLength = zip64header.byteLength;
  }
  const header = new DataView(new ArrayBuffer(Number(FILE_NAME_OFFSET)));
  for (const field of ZIP_HEADER_FIELDS2) {
    setFieldToNumber(header, field.size, field.offset, optionsToUse[field.name ?? ""] ?? field.default ?? 0);
  }
  const encodedName = new TextEncoder().encode(optionsToUse.fileName);
  const resHeader = (0, import_loader_utils4.concatenateArrayBuffers)(header.buffer, encodedName, zip64header);
  return resHeader;
}
var ZIP_HEADER_FIELDS2 = [
  // Local file header signature = 0x04034b50
  {
    offset: 0,
    size: 4,
    default: new DataView(signature3.buffer).getUint32(0, true)
  },
  // Version needed to extract (minimum)
  {
    offset: 4,
    size: 2,
    default: 45
  },
  // General purpose bit flag
  {
    offset: 6,
    size: 2,
    default: 0
  },
  // Compression method
  {
    offset: 8,
    size: 2,
    default: 0
  },
  // File last modification time
  {
    offset: 10,
    size: 2,
    default: 0
  },
  // File last modification date
  {
    offset: 12,
    size: 2,
    default: 0
  },
  // CRC-32 of uncompressed data
  {
    offset: 14,
    size: 4,
    name: "crc32"
  },
  // Compressed size (or 0xffffffff for ZIP64)
  {
    offset: 18,
    size: 4,
    name: "length"
  },
  // Uncompressed size (or 0xffffffff for ZIP64)
  {
    offset: 22,
    size: 4,
    name: "length"
  },
  // File name length (n)
  {
    offset: 26,
    size: 2,
    name: "fnlength"
  },
  // Extra field length (m)
  {
    offset: 28,
    size: 2,
    default: 0,
    name: "extraLength"
  }
];

// dist/parse-zip/zip-composition.js
var import_loader_utils5 = require("@loaders.gl/loader-utils");
var import_crypto = require("@loaders.gl/crypto");
var import_core = require("@loaders.gl/core");
async function cutTheTailOff(provider) {
  const oldEoCDinfo = await parseEoCDRecord(provider);
  const oldCDStartOffset = oldEoCDinfo.cdStartOffset;
  const oldCDLength = Number(oldEoCDinfo.offsets.zip64EoCDOffset ? oldEoCDinfo.offsets.zip64EoCDOffset - oldCDStartOffset : oldEoCDinfo.offsets.zipEoCDOffset - oldCDStartOffset);
  const zipEnding = await provider.slice(oldCDStartOffset, provider.length);
  await provider.truncate(Number(oldCDStartOffset));
  const oldCDBody = zipEnding.slice(0, oldCDLength);
  const eocdBody = zipEnding.slice(oldCDLength, zipEnding.byteLength);
  return [oldCDBody, eocdBody, oldEoCDinfo];
}
async function generateFileHeaders(fileName, fileToAdd, localFileHeaderOffset) {
  const newFileCRC322 = parseInt(await new import_crypto.CRC32Hash().hash(fileToAdd, "hex"), 16);
  const newFileLocalHeader = generateLocalHeader({
    crc32: newFileCRC322,
    fileName,
    length: fileToAdd.byteLength
  });
  const newFileCDHeader = generateCDHeader({
    crc32: newFileCRC322,
    fileName,
    offset: localFileHeaderOffset,
    length: fileToAdd.byteLength
  });
  return [
    new Uint8Array((0, import_loader_utils5.concatenateArrayBuffers)(newFileLocalHeader, fileToAdd)),
    new Uint8Array(newFileCDHeader)
  ];
}
async function addOneFile(zipUrl, fileToAdd, fileName) {
  const provider = new import_loader_utils5.FileHandleFile(zipUrl, true);
  const [oldCDBody, eocdBody, oldEoCDinfo] = await cutTheTailOff(provider);
  const newFileOffset = provider.length;
  const [localPart, cdHeaderPart] = await generateFileHeaders(fileName, fileToAdd, newFileOffset);
  await provider.append(localPart);
  const newCDBody = (0, import_loader_utils5.concatenateArrayBuffers)(oldCDBody, cdHeaderPart);
  const newCDStartOffset = provider.length;
  await provider.append(new Uint8Array(newCDBody));
  const eocdOffset = provider.length;
  await provider.append(updateEoCD(eocdBody, oldEoCDinfo.offsets, newCDStartOffset, eocdOffset, oldEoCDinfo.cdRecordsNumber + 1n));
}
async function createZip(inputPath, outputPath, createAdditionalData) {
  const fileIterator = getFileIterator(inputPath);
  const resFile = new import_loader_utils5.NodeFile(outputPath, "w");
  const fileList = [];
  const cdArray = [];
  for await (const file of fileIterator) {
    await addFile(file, resFile, cdArray, fileList);
  }
  if (createAdditionalData) {
    const additionaldata = await createAdditionalData(fileList);
    await addFile(additionaldata, resFile, cdArray);
  }
  const cdOffset = (await resFile.stat()).bigsize;
  const cd = (0, import_loader_utils5.concatenateArrayBuffers)(...cdArray);
  await resFile.append(new Uint8Array(cd));
  const eoCDStart = (await resFile.stat()).bigsize;
  await resFile.append(new Uint8Array(generateEoCD({ recordsNumber: cdArray.length, cdSize: cd.byteLength, cdOffset, eoCDStart })));
}
async function addFile(file, resFile, cdArray, fileList) {
  const size = (await resFile.stat()).bigsize;
  fileList == null ? void 0 : fileList.push({ fileName: file.path, localHeaderOffset: size });
  const [localPart, cdHeaderPart] = await generateFileHeaders(file.path, file.file, size);
  await resFile.append(localPart);
  cdArray.push(cdHeaderPart);
}
function getFileIterator(inputPath) {
  async function* iterable() {
    const fileList = await getAllFiles(inputPath);
    for (const filePath of fileList) {
      const file = await (await (0, import_core.fetchFile)(import_loader_utils5.path.join(inputPath, filePath))).arrayBuffer();
      yield { path: filePath, file };
    }
  }
  return iterable();
}
async function getAllFiles(basePath, subfolder = "", fsPassed) {
  const fs = fsPassed ? fsPassed : new import_loader_utils5.NodeFilesystem({});
  const files = await fs.readdir(pathJoin(basePath, subfolder));
  const arrayOfFiles = [];
  for (const file of files) {
    const fullPath = pathJoin(basePath, subfolder, file);
    if ((await fs.stat(fullPath)).isDirectory) {
      const files2 = await getAllFiles(basePath, pathJoin(subfolder, file));
      arrayOfFiles.push(...files2);
    } else {
      arrayOfFiles.push(pathJoin(subfolder, file));
    }
  }
  return arrayOfFiles;
}
function pathJoin(...paths) {
  const resPaths = paths.filter((val) => val.length);
  return import_loader_utils5.path.join(...resPaths);
}

// dist/filesystems/zip-filesystem.js
var import_loader_utils6 = require("@loaders.gl/loader-utils");
var import_compression = require("@loaders.gl/compression");
var ZIP_COMPRESSION_HANDLERS = {
  /** No compression */
  0: async (compressedFile) => compressedFile,
  /** Deflation */
  8: async (compressedFile) => {
    const compression = new import_compression.DeflateCompression({ raw: true });
    const decompressedData = await compression.decompress(compressedFile);
    return decompressedData;
  }
};
var ZipFileSystem = class {
  /** FileProvider instance promise */
  fileProvider = null;
  fileName;
  archive = null;
  /**
   * Constructor
   * @param file - instance of FileProvider or file path string
   */
  constructor(file) {
    if (typeof file === "string") {
      this.fileName = file;
      if (!import_loader_utils6.isBrowser) {
        this.fileProvider = new import_loader_utils6.FileHandleFile(file);
      } else {
        throw new Error("Cannot open file for random access in a WEB browser");
      }
    } else if (file instanceof IndexedArchive) {
      this.fileProvider = file.fileProvider;
      this.archive = file;
      this.fileName = file.fileName;
    } else if ((0, import_loader_utils6.isFileProvider)(file)) {
      this.fileProvider = file;
    }
  }
  /** Clean up resources */
  async destroy() {
    if (this.fileProvider) {
      await this.fileProvider.destroy();
    }
  }
  /**
   * Get file names list from zip archive
   * @returns array of file names
   */
  async readdir() {
    if (!this.fileProvider) {
      throw new Error("No data detected in the zip archive");
    }
    const fileNames = [];
    const zipCDIterator = makeZipCDHeaderIterator(this.fileProvider);
    for await (const cdHeader of zipCDIterator) {
      fileNames.push(cdHeader.fileName);
    }
    return fileNames;
  }
  /**
   * Get file metadata
   * @param filename - name of a file
   * @returns central directory data
   */
  async stat(filename) {
    const cdFileHeader = await this.getCDFileHeader(filename);
    return { ...cdFileHeader, size: Number(cdFileHeader.uncompressedSize) };
  }
  /**
   * Implementation of fetch against this file system
   * @param filename - name of a file
   * @returns - Response with file data
   */
  async fetch(filename) {
    if (this.fileName && filename.indexOf(this.fileName) === 0) {
      filename = filename.substring(this.fileName.length + 1);
    }
    let uncompressedFile;
    if (this.archive) {
      uncompressedFile = await this.archive.getFile(filename, "http");
    } else {
      if (!this.fileProvider) {
        throw new Error("No data detected in the zip archive");
      }
      const cdFileHeader = await this.getCDFileHeader(filename);
      const localFileHeader = await parseZipLocalFileHeader(cdFileHeader.localHeaderOffset, this.fileProvider);
      if (!localFileHeader) {
        throw new Error("Local file header has not been found in the zip archive`");
      }
      const compressionHandler = ZIP_COMPRESSION_HANDLERS[localFileHeader.compressionMethod.toString()];
      if (!compressionHandler) {
        throw Error("Only Deflation compression is supported");
      }
      const compressedFile = await this.fileProvider.slice(localFileHeader.fileDataOffset, localFileHeader.fileDataOffset + localFileHeader.compressedSize);
      uncompressedFile = await compressionHandler(compressedFile);
    }
    const response = new Response(uncompressedFile);
    Object.defineProperty(response, "url", {
      value: filename ? `${this.fileName || ""}/${filename}` : this.fileName || ""
    });
    return response;
  }
  /**
   * Get central directory file header
   * @param filename - name of a file
   * @returns central directory file header
   */
  async getCDFileHeader(filename) {
    if (!this.fileProvider) {
      throw new Error("No data detected in the zip archive");
    }
    const zipCDIterator = makeZipCDHeaderIterator(this.fileProvider);
    let result = null;
    for await (const cdHeader of zipCDIterator) {
      if (cdHeader.fileName === filename) {
        result = cdHeader;
        break;
      }
    }
    if (!result) {
      throw new Error("File has not been found in the zip archive");
    }
    return result;
  }
};

// dist/filesystems/IndexedArchive.js
var IndexedArchive = class {
  fileProvider;
  fileName;
  /**
   * Constructor
   * @param fileProvider - instance of a binary data reader
   * @param hashTable - pre-loaded hashTable. If presented, getFile will skip reading the hash file
   * @param fileName - name of the archive. It is used to add to an URL of a loader context
   */
  constructor(fileProvider, hashTable, fileName) {
    this.fileProvider = fileProvider;
    this.fileName = fileName;
  }
  /**
   * Get file as from order ZIP arhive without using the hash file
   * @param filename - path to the internal file
   * @returns
   */
  async getFileWithoutHash(filename) {
    const zipFS = new ZipFileSystem(this.fileProvider);
    const response = await zipFS.fetch(filename);
    return await response.arrayBuffer();
  }
};

// dist/hash-file-utility.js
var import_crypto2 = require("@loaders.gl/crypto");
var import_loader_utils7 = require("@loaders.gl/loader-utils");
function parseHashTable(arrayBuffer) {
  const dataView = new DataView(arrayBuffer);
  const hashMap = {};
  for (let i = 0; i < arrayBuffer.byteLength; i = i + 24) {
    const offset = dataView.getBigUint64(i + 16, true);
    const hash = bufferToHex(arrayBuffer, i, 16);
    hashMap[hash] = offset;
  }
  return hashMap;
}
function bufferToHex(buffer, start, length) {
  return [...new Uint8Array(buffer, start, length)].map((x) => x.toString(16).padStart(2, "0")).join("");
}
async function makeHashTableFromZipHeaders(fileProvider) {
  const zipCDIterator = makeZipCDHeaderIterator(fileProvider);
  return getHashTable(zipCDIterator);
}
async function getHashTable(zipCDIterator) {
  const md5Hash = new import_crypto2.MD5Hash();
  const textEncoder = new TextEncoder();
  const hashTable = {};
  for await (const cdHeader of zipCDIterator) {
    const filename = cdHeader.fileName.split("\\").join("/").toLocaleLowerCase();
    const arrayBuffer = textEncoder.encode(filename).buffer;
    const md5 = await md5Hash.hash(arrayBuffer, "hex");
    hashTable[md5] = cdHeader.localHeaderOffset;
  }
  return hashTable;
}
async function composeHashFile(zipCDIterator) {
  const md5Hash = new import_crypto2.MD5Hash();
  const textEncoder = new TextEncoder();
  const hashArray = [];
  for await (const cdHeader of zipCDIterator) {
    let filename = cdHeader.fileName.split("\\").join("/");
    if (filename !== "3dSceneLayer.json.gz") {
      filename = filename.toLocaleLowerCase();
    }
    const arrayBuffer = textEncoder.encode(filename).buffer;
    const md5 = await md5Hash.hash(arrayBuffer, "hex");
    hashArray.push((0, import_loader_utils7.concatenateArrayBuffers)(hexStringToBuffer(md5), bigintToBuffer(cdHeader.localHeaderOffset)));
  }
  const bufferArray = hashArray.sort(compareHashes);
  return (0, import_loader_utils7.concatenateArrayBuffersFromArray)(bufferArray);
}
function compareHashes(arrA, arrB) {
  const a = new BigUint64Array(arrA);
  const b = new BigUint64Array(arrB);
  return Number(a[0] === b[0] ? a[1] - b[1] : a[0] - b[0]);
}
function hexStringToBuffer(str) {
  var _a;
  const byteArray = (_a = str.match(/../g)) == null ? void 0 : _a.map((h) => parseInt(h, 16));
  return new Uint8Array(byteArray ?? new Array(16)).buffer;
}
function bigintToBuffer(n) {
  return new BigUint64Array([n]).buffer;
}
//# sourceMappingURL=index.cjs.map