minigame

node_modules/adm-zip/adm-zip.js

@@ -0,0 +1,783 @@
+const Utils = require("./util");
+const pth = require("path");
+const ZipEntry = require("./zipEntry");
+const ZipFile = require("./zipFile");
+
+const get_Bool = (val, def) => (typeof val === "boolean" ? val : def);
+const get_Str = (val, def) => (typeof val === "string" ? val : def);
+
+const defaultOptions = {
+    // option "noSort" : if true it disables files sorting
+    noSort: false,
+    // read entries during load (initial loading may be slower)
+    readEntries: false,
+    // default method is none
+    method: Utils.Constants.NONE,
+    // file system
+    fs: null
+};
+
+module.exports = function (/**String*/ input, /** object */ options) {
+    let inBuffer = null;
+
+    // create object based default options, allowing them to be overwritten
+    const opts = Object.assign(Object.create(null), defaultOptions);
+
+    // test input variable
+    if (input && "object" === typeof input) {
+        // if value is not buffer we accept it to be object with options
+        if (!(input instanceof Uint8Array)) {
+            Object.assign(opts, input);
+            input = opts.input ? opts.input : undefined;
+            if (opts.input) delete opts.input;
+        }
+
+        // if input is buffer
+        if (Buffer.isBuffer(input)) {
+            inBuffer = input;
+            opts.method = Utils.Constants.BUFFER;
+            input = undefined;
+        }
+    }
+
+    // assign options
+    Object.assign(opts, options);
+
+    // instanciate utils filesystem
+    const filetools = new Utils(opts);
+
+    // if input is file name we retrieve its content
+    if (input && "string" === typeof input) {
+        // load zip file
+        if (filetools.fs.existsSync(input)) {
+            opts.method = Utils.Constants.FILE;
+            opts.filename = input;
+            inBuffer = filetools.fs.readFileSync(input);
+        } else {
+            throw new Error(Utils.Errors.INVALID_FILENAME);
+        }
+    }
+
+    // create variable
+    const _zip = new ZipFile(inBuffer, opts);
+
+    const { canonical, sanitize } = Utils;
+
+    function getEntry(/**Object*/ entry) {
+        if (entry && _zip) {
+            var item;
+            // If entry was given as a file name
+            if (typeof entry === "string") item = _zip.getEntry(entry);
+            // if entry was given as a ZipEntry object
+            if (typeof entry === "object" && typeof entry.entryName !== "undefined" && typeof entry.header !== "undefined") item = _zip.getEntry(entry.entryName);
+
+            if (item) {
+                return item;
+            }
+        }
+        return null;
+    }
+
+    function fixPath(zipPath) {
+        const { join, normalize, sep } = pth.posix;
+        // convert windows file separators and normalize
+        return join(".", normalize(sep + zipPath.split("\\").join(sep) + sep));
+    }
+
+    return {
+        /**
+         * Extracts the given entry from the archive and returns the content as a Buffer object
+         * @param entry ZipEntry object or String with the full path of the entry
+         *
+         * @return Buffer or Null in case of error
+         */
+        readFile: function (/**Object*/ entry, /*String, Buffer*/ pass) {
+            var item = getEntry(entry);
+            return (item && item.getData(pass)) || null;
+        },
+
+        /**
+         * Asynchronous readFile
+         * @param entry ZipEntry object or String with the full path of the entry
+         * @param callback
+         *
+         * @return Buffer or Null in case of error
+         */
+        readFileAsync: function (/**Object*/ entry, /**Function*/ callback) {
+            var item = getEntry(entry);
+            if (item) {
+                item.getDataAsync(callback);
+            } else {
+                callback(null, "getEntry failed for:" + entry);
+            }
+        },
+
+        /**
+         * Extracts the given entry from the archive and returns the content as plain text in the given encoding
+         * @param entry ZipEntry object or String with the full path of the entry
+         * @param encoding Optional. If no encoding is specified utf8 is used
+         *
+         * @return String
+         */
+        readAsText: function (/**Object*/ entry, /**String=*/ encoding) {
+            var item = getEntry(entry);
+            if (item) {
+                var data = item.getData();
+                if (data && data.length) {
+                    return data.toString(encoding || "utf8");
+                }
+            }
+            return "";
+        },
+
+        /**
+         * Asynchronous readAsText
+         * @param entry ZipEntry object or String with the full path of the entry
+         * @param callback
+         * @param encoding Optional. If no encoding is specified utf8 is used
+         *
+         * @return String
+         */
+        readAsTextAsync: function (/**Object*/ entry, /**Function*/ callback, /**String=*/ encoding) {
+            var item = getEntry(entry);
+            if (item) {
+                item.getDataAsync(function (data, err) {
+                    if (err) {
+                        callback(data, err);
+                        return;
+                    }
+
+                    if (data && data.length) {
+                        callback(data.toString(encoding || "utf8"));
+                    } else {
+                        callback("");
+                    }
+                });
+            } else {
+                callback("");
+            }
+        },
+
+        /**
+         * Remove the entry from the file or the entry and all it's nested directories and files if the given entry is a directory
+         *
+         * @param entry
+         */
+        deleteFile: function (/**Object*/ entry) {
+            // @TODO: test deleteFile
+            var item = getEntry(entry);
+            if (item) {
+                _zip.deleteEntry(item.entryName);
+            }
+        },
+
+        /**
+         * Adds a comment to the zip. The zip must be rewritten after adding the comment.
+         *
+         * @param comment
+         */
+        addZipComment: function (/**String*/ comment) {
+            // @TODO: test addZipComment
+            _zip.comment = comment;
+        },
+
+        /**
+         * Returns the zip comment
+         *
+         * @return String
+         */
+        getZipComment: function () {
+            return _zip.comment || "";
+        },
+
+        /**
+         * Adds a comment to a specified zipEntry. The zip must be rewritten after adding the comment
+         * The comment cannot exceed 65535 characters in length
+         *
+         * @param entry
+         * @param comment
+         */
+        addZipEntryComment: function (/**Object*/ entry, /**String*/ comment) {
+            var item = getEntry(entry);
+            if (item) {
+                item.comment = comment;
+            }
+        },
+
+        /**
+         * Returns the comment of the specified entry
+         *
+         * @param entry
+         * @return String
+         */
+        getZipEntryComment: function (/**Object*/ entry) {
+            var item = getEntry(entry);
+            if (item) {
+                return item.comment || "";
+            }
+            return "";
+        },
+
+        /**
+         * Updates the content of an existing entry inside the archive. The zip must be rewritten after updating the content
+         *
+         * @param entry
+         * @param content
+         */
+        updateFile: function (/**Object*/ entry, /**Buffer*/ content) {
+            var item = getEntry(entry);
+            if (item) {
+                item.setData(content);
+            }
+        },
+
+        /**
+         * Adds a file from the disk to the archive
+         *
+         * @param localPath File to add to zip
+         * @param zipPath Optional path inside the zip
+         * @param zipName Optional name for the file
+         */
+        addLocalFile: function (/**String*/ localPath, /**String=*/ zipPath, /**String=*/ zipName, /**String*/ comment) {
+            if (filetools.fs.existsSync(localPath)) {
+                // fix ZipPath
+                zipPath = zipPath ? fixPath(zipPath) : "";
+
+                // p - local file name
+                var p = localPath.split("\\").join("/").split("/").pop();
+
+                // add file name into zippath
+                zipPath += zipName ? zipName : p;
+
+                // read file attributes
+                const _attr = filetools.fs.statSync(localPath);
+
+                // add file into zip file
+                this.addFile(zipPath, filetools.fs.readFileSync(localPath), comment, _attr);
+            } else {
+                throw new Error(Utils.Errors.FILE_NOT_FOUND.replace("%s", localPath));
+            }
+        },
+
+        /**
+         * Adds a local directory and all its nested files and directories to the archive
+         *
+         * @param localPath
+         * @param zipPath optional path inside zip
+         * @param filter optional RegExp or Function if files match will
+         *               be included.
+         */
+        addLocalFolder: function (/**String*/ localPath, /**String=*/ zipPath, /**=RegExp|Function*/ filter) {
+            // Prepare filter
+            if (filter instanceof RegExp) {
+                // if filter is RegExp wrap it
+                filter = (function (rx) {
+                    return function (filename) {
+                        return rx.test(filename);
+                    };
+                })(filter);
+            } else if ("function" !== typeof filter) {
+                // if filter is not function we will replace it
+                filter = function () {
+                    return true;
+                };
+            }
+
+            // fix ZipPath
+            zipPath = zipPath ? fixPath(zipPath) : "";
+
+            // normalize the path first
+            localPath = pth.normalize(localPath);
+
+            if (filetools.fs.existsSync(localPath)) {
+                const items = filetools.findFiles(localPath);
+                const self = this;
+
+                if (items.length) {
+                    items.forEach(function (filepath) {
+                        var p = pth.relative(localPath, filepath).split("\\").join("/"); //windows fix
+                        if (filter(p)) {
+                            var stats = filetools.fs.statSync(filepath);
+                            if (stats.isFile()) {
+                                self.addFile(zipPath + p, filetools.fs.readFileSync(filepath), "", stats);
+                            } else {
+                                self.addFile(zipPath + p + "/", Buffer.alloc(0), "", stats);
+                            }
+                        }
+                    });
+                }
+            } else {
+                throw new Error(Utils.Errors.FILE_NOT_FOUND.replace("%s", localPath));
+            }
+        },
+
+        /**
+         * Asynchronous addLocalFile
+         * @param localPath
+         * @param callback
+         * @param zipPath optional path inside zip
+         * @param filter optional RegExp or Function if files match will
+         *               be included.
+         */
+        addLocalFolderAsync: function (/*String*/ localPath, /*Function*/ callback, /*String*/ zipPath, /*RegExp|Function*/ filter) {
+            if (filter instanceof RegExp) {
+                filter = (function (rx) {
+                    return function (filename) {
+                        return rx.test(filename);
+                    };
+                })(filter);
+            } else if ("function" !== typeof filter) {
+                filter = function () {
+                    return true;
+                };
+            }
+
+            // fix ZipPath
+            zipPath = zipPath ? fixPath(zipPath) : "";
+
+            // normalize the path first
+            localPath = pth.normalize(localPath);
+
+            var self = this;
+            filetools.fs.open(localPath, "r", function (err) {
+                if (err && err.code === "ENOENT") {
+                    callback(undefined, Utils.Errors.FILE_NOT_FOUND.replace("%s", localPath));
+                } else if (err) {
+                    callback(undefined, err);
+                } else {
+                    var items = filetools.findFiles(localPath);
+                    var i = -1;
+
+                    var next = function () {
+                        i += 1;
+                        if (i < items.length) {
+                            var filepath = items[i];
+                            var p = pth.relative(localPath, filepath).split("\\").join("/"); //windows fix
+                            p = p
+                                .normalize("NFD")
+                                .replace(/[\u0300-\u036f]/g, "")
+                                .replace(/[^\x20-\x7E]/g, ""); // accent fix
+                            if (filter(p)) {
+                                filetools.fs.stat(filepath, function (er0, stats) {
+                                    if (er0) callback(undefined, er0);
+                                    if (stats.isFile()) {
+                                        filetools.fs.readFile(filepath, function (er1, data) {
+                                            if (er1) {
+                                                callback(undefined, er1);
+                                            } else {
+                                                self.addFile(zipPath + p, data, "", stats);
+                                                next();
+                                            }
+                                        });
+                                    } else {
+                                        self.addFile(zipPath + p + "/", Buffer.alloc(0), "", stats);
+                                        next();
+                                    }
+                                });
+                            } else {
+                                next();
+                            }
+                        } else {
+                            callback(true, undefined);
+                        }
+                    };
+
+                    next();
+                }
+            });
+        },
+
+        /**
+         *
+         * @param {string} localPath - path where files will be extracted
+         * @param {object} props - optional properties
+         * @param {string} props.zipPath - optional path inside zip
+         * @param {regexp, function} props.filter - RegExp or Function if files match will be included.
+         */
+        addLocalFolderPromise: function (/*String*/ localPath, /* object */ props) {
+            return new Promise((resolve, reject) => {
+                const { filter, zipPath } = Object.assign({}, props);
+                this.addLocalFolderAsync(
+                    localPath,
+                    (done, err) => {
+                        if (err) reject(err);
+                        if (done) resolve(this);
+                    },
+                    zipPath,
+                    filter
+                );
+            });
+        },
+
+        /**
+         * Allows you to create a entry (file or directory) in the zip file.
+         * If you want to create a directory the entryName must end in / and a null buffer should be provided.
+         * Comment and attributes are optional
+         *
+         * @param {string} entryName
+         * @param {Buffer | string} content - file content as buffer or utf8 coded string
+         * @param {string} comment - file comment
+         * @param {number | object} attr - number as unix file permissions, object as filesystem Stats object
+         */
+        addFile: function (/**String*/ entryName, /**Buffer*/ content, /**String*/ comment, /**Number*/ attr) {
+            let entry = getEntry(entryName);
+            const update = entry != null;
+
+            // prepare new entry
+            if (!update) {
+                entry = new ZipEntry();
+                entry.entryName = entryName;
+            }
+            entry.comment = comment || "";
+
+            const isStat = "object" === typeof attr && attr instanceof filetools.fs.Stats;
+
+            // last modification time from file stats
+            if (isStat) {
+                entry.header.time = attr.mtime;
+            }
+
+            // Set file attribute
+            var fileattr = entry.isDirectory ? 0x10 : 0; // (MS-DOS directory flag)
+
+            // extended attributes field for Unix
+            if (!Utils.isWin) {
+                // set file type either S_IFDIR / S_IFREG
+                let unix = entry.isDirectory ? 0x4000 : 0x8000;
+
+                if (isStat) {
+                    // File attributes from file stats
+                    unix |= 0xfff & attr.mode;
+                } else if ("number" === typeof attr) {
+                    // attr from given attr values
+                    unix |= 0xfff & attr;
+                } else {
+                    // Default values:
+                    unix |= entry.isDirectory ? 0o755 : 0o644; // permissions (drwxr-xr-x) or (-r-wr--r--)
+                }
+
+                fileattr = (fileattr | (unix << 16)) >>> 0; // add attributes
+            }
+
+            entry.attr = fileattr;
+
+            entry.setData(content);
+            if (!update) _zip.setEntry(entry);
+        },
+
+        /**
+         * Returns an array of ZipEntry objects representing the files and folders inside the archive
+         *
+         * @return Array
+         */
+        getEntries: function () {
+            return _zip ? _zip.entries : [];
+        },
+
+        /**
+         * Returns a ZipEntry object representing the file or folder specified by ``name``.
+         *
+         * @param name
+         * @return ZipEntry
+         */
+        getEntry: function (/**String*/ name) {
+            return getEntry(name);
+        },
+
+        getEntryCount: function () {
+            return _zip.getEntryCount();
+        },
+
+        forEach: function (callback) {
+            return _zip.forEach(callback);
+        },
+
+        /**
+         * Extracts the given entry to the given targetPath
+         * If the entry is a directory inside the archive, the entire directory and it's subdirectories will be extracted
+         *
+         * @param entry ZipEntry object or String with the full path of the entry
+         * @param targetPath Target folder where to write the file
+         * @param maintainEntryPath If maintainEntryPath is true and the entry is inside a folder, the entry folder
+         *                          will be created in targetPath as well. Default is TRUE
+         * @param overwrite If the file already exists at the target path, the file will be overwriten if this is true.
+         *                  Default is FALSE
+         * @param keepOriginalPermission The file will be set as the permission from the entry if this is true.
+         *                  Default is FALSE
+         * @param outFileName String If set will override the filename of the extracted file (Only works if the entry is a file)
+         *
+         * @return Boolean
+         */
+        extractEntryTo: function (
+            /**Object*/ entry,
+            /**String*/ targetPath,
+            /**Boolean*/ maintainEntryPath,
+            /**Boolean*/ overwrite,
+            /**Boolean*/ keepOriginalPermission,
+            /**String**/ outFileName
+        ) {
+            overwrite = get_Bool(overwrite, false);
+            keepOriginalPermission = get_Bool(keepOriginalPermission, false);
+            maintainEntryPath = get_Bool(maintainEntryPath, true);
+            outFileName = get_Str(outFileName, get_Str(keepOriginalPermission, undefined));
+
+            var item = getEntry(entry);
+            if (!item) {
+                throw new Error(Utils.Errors.NO_ENTRY);
+            }
+
+            var entryName = canonical(item.entryName);
+
+            var target = sanitize(targetPath, outFileName && !item.isDirectory ? outFileName : maintainEntryPath ? entryName : pth.basename(entryName));
+
+            if (item.isDirectory) {
+                var children = _zip.getEntryChildren(item);
+                children.forEach(function (child) {
+                    if (child.isDirectory) return;
+                    var content = child.getData();
+                    if (!content) {
+                        throw new Error(Utils.Errors.CANT_EXTRACT_FILE);
+                    }
+                    var name = canonical(child.entryName);
+                    var childName = sanitize(targetPath, maintainEntryPath ? name : pth.basename(name));
+                    // The reverse operation for attr depend on method addFile()
+                    const fileAttr = keepOriginalPermission ? child.header.fileAttr : undefined;
+                    filetools.writeFileTo(childName, content, overwrite, fileAttr);
+                });
+                return true;
+            }
+
+            var content = item.getData();
+            if (!content) throw new Error(Utils.Errors.CANT_EXTRACT_FILE);
+
+            if (filetools.fs.existsSync(target) && !overwrite) {
+                throw new Error(Utils.Errors.CANT_OVERRIDE);
+            }
+            // The reverse operation for attr depend on method addFile()
+            const fileAttr = keepOriginalPermission ? entry.header.fileAttr : undefined;
+            filetools.writeFileTo(target, content, overwrite, fileAttr);
+
+            return true;
+        },
+
+        /**
+         * Test the archive
+         *
+         */
+        test: function (pass) {
+            if (!_zip) {
+                return false;
+            }
+
+            for (var entry in _zip.entries) {
+                try {
+                    if (entry.isDirectory) {
+                        continue;
+                    }
+                    var content = _zip.entries[entry].getData(pass);
+                    if (!content) {
+                        return false;
+                    }
+                } catch (err) {
+                    return false;
+                }
+            }
+            return true;
+        },
+
+        /**
+         * Extracts the entire archive to the given location
+         *
+         * @param targetPath Target location
+         * @param overwrite If the file already exists at the target path, the file will be overwriten if this is true.
+         *                  Default is FALSE
+         * @param keepOriginalPermission The file will be set as the permission from the entry if this is true.
+         *                  Default is FALSE
+         */
+        extractAllTo: function (/**String*/ targetPath, /**Boolean*/ overwrite, /**Boolean*/ keepOriginalPermission, /*String, Buffer*/ pass) {
+            overwrite = get_Bool(overwrite, false);
+            pass = get_Str(keepOriginalPermission, pass);
+            keepOriginalPermission = get_Bool(keepOriginalPermission, false);
+            if (!_zip) {
+                throw new Error(Utils.Errors.NO_ZIP);
+            }
+            _zip.entries.forEach(function (entry) {
+                var entryName = sanitize(targetPath, canonical(entry.entryName.toString()));
+                if (entry.isDirectory) {
+                    filetools.makeDir(entryName);
+                    return;
+                }
+                var content = entry.getData(pass);
+                if (!content) {
+                    throw new Error(Utils.Errors.CANT_EXTRACT_FILE);
+                }
+                // The reverse operation for attr depend on method addFile()
+                const fileAttr = keepOriginalPermission ? entry.header.fileAttr : undefined;
+                filetools.writeFileTo(entryName, content, overwrite, fileAttr);
+                try {
+                    filetools.fs.utimesSync(entryName, entry.header.time, entry.header.time);
+                } catch (err) {
+                    throw new Error(Utils.Errors.CANT_EXTRACT_FILE);
+                }
+            });
+        },
+
+        /**
+         * Asynchronous extractAllTo
+         *
+         * @param targetPath Target location
+         * @param overwrite If the file already exists at the target path, the file will be overwriten if this is true.
+         *                  Default is FALSE
+         * @param keepOriginalPermission The file will be set as the permission from the entry if this is true.
+         *                  Default is FALSE
+         * @param callback The callback will be executed when all entries are extracted successfully or any error is thrown.
+         */
+        extractAllToAsync: function (/**String*/ targetPath, /**Boolean*/ overwrite, /**Boolean*/ keepOriginalPermission, /**Function*/ callback) {
+            if (!callback) {
+                callback = function () {};
+            }
+            overwrite = get_Bool(overwrite, false);
+            if (typeof keepOriginalPermission === "function" && !callback) callback = keepOriginalPermission;
+            keepOriginalPermission = get_Bool(keepOriginalPermission, false);
+            if (!_zip) {
+                callback(new Error(Utils.Errors.NO_ZIP));
+                return;
+            }
+
+            targetPath = pth.resolve(targetPath);
+            // convert entryName to
+            const getPath = (entry) => sanitize(targetPath, pth.normalize(canonical(entry.entryName.toString())));
+            const getError = (msg, file) => new Error(msg + ': "' + file + '"');
+
+            // separate directories from files
+            const dirEntries = [];
+            const fileEntries = new Set();
+            _zip.entries.forEach((e) => {
+                if (e.isDirectory) {
+                    dirEntries.push(e);
+                } else {
+                    fileEntries.add(e);
+                }
+            });
+
+            // Create directory entries first synchronously
+            // this prevents race condition and assures folders are there before writing files
+            for (const entry of dirEntries) {
+                const dirPath = getPath(entry);
+                // The reverse operation for attr depend on method addFile()
+                const dirAttr = keepOriginalPermission ? entry.header.fileAttr : undefined;
+                try {
+                    filetools.makeDir(dirPath);
+                    if (dirAttr) filetools.fs.chmodSync(dirPath, dirAttr);
+                    // in unix timestamp will change if files are later added to folder, but still
+                    filetools.fs.utimesSync(dirPath, entry.header.time, entry.header.time);
+                } catch (er) {
+                    callback(getError("Unable to create folder", dirPath));
+                }
+            }
+
+            // callback wrapper, for some house keeping
+            const done = () => {
+                if (fileEntries.size === 0) {
+                    callback();
+                }
+            };
+
+            // Extract file entries asynchronously
+            for (const entry of fileEntries.values()) {
+                const entryName = pth.normalize(canonical(entry.entryName.toString()));
+                const filePath = sanitize(targetPath, entryName);
+                entry.getDataAsync(function (content, err_1) {
+                    if (err_1) {
+                        callback(new Error(err_1));
+                        return;
+                    }
+                    if (!content) {
+                        callback(new Error(Utils.Errors.CANT_EXTRACT_FILE));
+                    } else {
+                        // The reverse operation for attr depend on method addFile()
+                        const fileAttr = keepOriginalPermission ? entry.header.fileAttr : undefined;
+                        filetools.writeFileToAsync(filePath, content, overwrite, fileAttr, function (succ) {
+                            if (!succ) {
+                                callback(getError("Unable to write file", filePath));
+                                return;
+                            }
+                            filetools.fs.utimes(filePath, entry.header.time, entry.header.time, function (err_2) {
+                                if (err_2) {
+                                    callback(getError("Unable to set times", filePath));
+                                    return;
+                                }
+                                fileEntries.delete(entry);
+                                // call the callback if it was last entry
+                                done();
+                            });
+                        });
+                    }
+                });
+            }
+            // call the callback if fileEntries was empty
+            done();
+        },
+
+        /**
+         * Writes the newly created zip file to disk at the specified location or if a zip was opened and no ``targetFileName`` is provided, it will overwrite the opened zip
+         *
+         * @param targetFileName
+         * @param callback
+         */
+        writeZip: function (/**String*/ targetFileName, /**Function*/ callback) {
+            if (arguments.length === 1) {
+                if (typeof targetFileName === "function") {
+                    callback = targetFileName;
+                    targetFileName = "";
+                }
+            }
+
+            if (!targetFileName && opts.filename) {
+                targetFileName = opts.filename;
+            }
+            if (!targetFileName) return;
+
+            var zipData = _zip.compressToBuffer();
+            if (zipData) {
+                var ok = filetools.writeFileTo(targetFileName, zipData, true);
+                if (typeof callback === "function") callback(!ok ? new Error("failed") : null, "");
+            }
+        },
+
+        writeZipPromise: function (/**String*/ targetFileName, /* object */ props) {
+            const { overwrite, perm } = Object.assign({ overwrite: true }, props);
+
+            return new Promise((resolve, reject) => {
+                // find file name
+                if (!targetFileName && opts.filename) targetFileName = opts.filename;
+                if (!targetFileName) reject("ADM-ZIP: ZIP File Name Missing");
+
+                this.toBufferPromise().then((zipData) => {
+                    const ret = (done) => (done ? resolve(done) : reject("ADM-ZIP: Wasn't able to write zip file"));
+                    filetools.writeFileToAsync(targetFileName, zipData, overwrite, perm, ret);
+                }, reject);
+            });
+        },
+
+        toBufferPromise: function () {
+            return new Promise((resolve, reject) => {
+                _zip.toAsyncBuffer(resolve, reject);
+            });
+        },
+
+        /**
+         * Returns the content of the entire zip file as a Buffer object
+         *
+         * @return Buffer
+         */
+        toBuffer: function (/**Function=*/ onSuccess, /**Function=*/ onFail, /**Function=*/ onItemStart, /**Function=*/ onItemEnd) {
+            this.valueOf = 2;
+            if (typeof onSuccess === "function") {
+                _zip.toAsyncBuffer(onSuccess, onFail, onItemStart, onItemEnd);
+                return null;
+            }
+            return _zip.compressToBuffer();
+        }
+    };
+};