@loaders.gl/zip/dist/zip-writer.js

Zip Archive Loader

// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
import JSZip from 'jszip';
// @ts-ignore TS2304: Cannot find name '__VERSION__'.
const VERSION = typeof "4.4.3" !== 'undefined' ? "4.4.3" : 'latest';
/**
 * Zip exporter
 */
export const ZipWriter = {
    name: 'Zip Archive',
    id: 'zip',
    module: 'zip',
    version: VERSION,
    extensions: ['zip'],
    category: 'archive',
    mimeTypes: ['application/zip'],
    options: {
        zip: {
            onUpdate: () => { },
            createFolders: false
        },
        jszip: {}
    },
    encode: encodeZipAsync
};
async function encodeZipAsync(fileMap, options = {}) {
    const jsZip = new JSZip();
    const directoryEntries = new Set();
    const zipOptions = { ...ZipWriter.options.zip, ...options?.zip };
    const jszipOptions = { ...ZipWriter.options?.jszip, ...options.jszip };
    const jszipFileOptions = {
        createFolders: false,
        ...jszipOptions
    };
    // add files to the zip
    for (const subFileName in fileMap) {
        const subFileData = fileMap[subFileName];
        const isDirectoryEntry = subFileName.endsWith('/');
        if (isDirectoryEntry || zipOptions.createFolders) {
            addParentDirectoryEntries(jsZip, subFileName, options, directoryEntries);
        }
        // jszip supports both arraybuffer and string data (the main loaders.gl types)
        // https://stuk.github.io/jszip/documentation/api_zipobject/async.html
        if (isDirectoryEntry) {
            jsZip.file(subFileName, null, { ...jszipFileOptions, dir: true });
        }
        else {
            jsZip.file(subFileName, subFileData, jszipFileOptions);
        }
    }
    const jszipGeneratorOptions = jszipOptions;
    try {
        return await jsZip.generateAsync({ ...jszipGeneratorOptions, type: 'arraybuffer' }, // generate an arraybuffer
        zipOptions.onUpdate);
    }
    catch (error) {
        options.core?.log?.error(`Unable to encode zip archive: ${error}`);
        throw error;
    }
}
function addParentDirectoryEntries(jsZip, subFileName, options, directoryEntries) {
    const subPathParts = subFileName.split('/').filter((part) => part.length > 0);
    const subPathPartCount = subFileName.endsWith('/')
        ? subPathParts.length
        : subPathParts.length - 1;
    let parentDirectoryPath = '';
    for (let index = 0; index < subPathPartCount; index++) {
        parentDirectoryPath = `${parentDirectoryPath}${subPathParts[index]}/`;
        if (directoryEntries.has(parentDirectoryPath)) {
            continue;
        }
        jsZip.file(parentDirectoryPath, null, {
            createFolders: false,
            ...options?.jszip,
            dir: true
        });
        directoryEntries.add(parentDirectoryPath);
    }
}
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