chromiumly/dist/pdf-engines/utils/pdf-engines.utils.js

A lightweight Typescript library that interacts with Gotenberg's different modules to convert a variety of document formats to PDF files.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PDFEnginesUtils = void 0;
const tslib_1 = require("tslib");
const fs_1 = require("fs");
const path_1 = tslib_1.__importDefault(require("path"));
const consumers_1 = require("node:stream/consumers");
const common_1 = require("../../common");
/**
 * Utility class for handling common tasks related to PDF engine operations.
 */
class PDFEnginesUtils {
    /**
     * Adds PDF files to the FormData object.
     *
     * @param {PathLikeOrReadStream[]} files - An array of PDF files to be added to the FormData.
     * @param {FormData} data - The FormData object to which PDF files will be added.
     * @throws {Error} Throws an error if the file extension is not supported.
     */
    static addFiles(files, data) {
        return tslib_1.__awaiter(this, void 0, void 0, function* () {
            const paddingLength = String(files.length).length + 1;
            yield Promise.all(files.map((file, index) => tslib_1.__awaiter(this, void 0, void 0, function* () {
                const filename = `file${String(index + 1).padStart(paddingLength, '0')}.pdf`;
                if (Buffer.isBuffer(file)) {
                    data.append('files', new Blob([file]), filename);
                }
                else if (file instanceof fs_1.ReadStream) {
                    const content = yield (0, consumers_1.blob)(file);
                    data.append('files', content, filename);
                }
                else {
                    yield fs_1.promises.access(file, fs_1.constants.R_OK);
                    const _filename = path_1.default.basename(file.toString());
                    const extension = path_1.default.extname(_filename);
                    if (extension === '.pdf') {
                        const content = yield (0, fs_1.openAsBlob)(file);
                        data.append('files', content, _filename);
                    }
                    else {
                        throw new Error(`${extension} is not supported`);
                    }
                }
            })));
        });
    }
    /**
     * Customizes the FormData object based on the provided conversion options.
     *
     * @param {FormData} data - The FormData object to be customized.
     * @param {ConversionOptions | MergeOptions} options - The options to apply to the FormData.
     * @returns {Promise<void>} A Promise that resolves once the customization is complete.
     */
    static customize(data, options) {
        return tslib_1.__awaiter(this, void 0, void 0, function* () {
            common_1.GotenbergUtils.assert(!!options.pdfa || !!options.pdfUA, 'At least one of pdfa or pdfUA must be provided');
            if (options.pdfa) {
                data.append('pdfa', options.pdfa);
            }
            if (options.pdfUA) {
                data.append('pdfUA', String(options.pdfUA));
            }
            if ('metadata' in options && options.metadata) {
                data.append('metadata', JSON.stringify(options.metadata));
            }
            if (options.downloadFrom) {
                data.append('downloadFrom', JSON.stringify(options.downloadFrom));
            }
            if ('flatten' in options && options.flatten) {
                data.append('flatten', String(options.flatten));
            }
        });
    }
}
exports.PDFEnginesUtils = PDFEnginesUtils;
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