在 Node.js SDK 中向 PDF 添加书签

    import credentials from "./credentials.json"  with { type: "json" }; // json-file in this format: { "id": "*****", "key": "*******" }
    import fs from 'node:fs/promises';
    import path from 'node:path';
    import { PdfApi } from "asposepdfcloud";
    import { Color } from "asposepdfcloud/src/models/color.js";
    import { Link } from "asposepdfcloud/src/models/link.js";
    import { Bookmark } from "asposepdfcloud/src/models/bookmark.js";
    import { Bookmarks } from "asposepdfcloud/src/models/bookmarks.js";

    const configParams = {
        LOCAL_FOLDER: "C:\\Samples\\",
        PDF_DOCUMENT_NAME: "sample.pdf",
        LOCAL_RESULT_DOCUMENT_NAME: "output_sample.pdf",
        NEW_BOOKMARK_TITLE: "• Productivity improvement",
        PARENT_BOOKMARK_FOR_APPEND: "",     //The parent bookmark path. Specify an empty string when adding a bookmark to the root.
        NEW_BOOKMARK_PAGE_NUMBER: 2,
    };

    const pdfApi = new PdfApi(credentials.id, credentials.key);

    const pdfBookmarks = {
        async uploadDocument() {
            const pdfFilePath = path.join(configParams.LOCAL_FOLDER, configParams.PDF_DOCUMENT_NAME);
            const pdfFileData = await fs.readFile(pdfFilePath);
            await pdfApi.uploadFile(configParams.PDF_DOCUMENT_NAME, pdfFileData);
        },

        async downloadResult() {
            const changedPdfData = await pdfApi.downloadFile(configParams.PDF_DOCUMENT_NAME);
            const filePath = path.join(configParams.LOCAL_FOLDER, configParams.LOCAL_RESULT_DOCUMENT_NAME);
            await fs.writeFile(filePath, changedPdfData.body);
            console.log("Downloaded: " + filePath);
        },

        async appendBookmarkLink() {
            const bookmarkLink = new Link({ rel: "self" });
            const bookmarkColor = new Color({ a: 255, r: 0, g: 255, b: 0 });

            const newBookmark = new Bookmark();
            newBookmark.title = configParams.NEW_BOOKMARK_TITLE;
            newBookmark.italic = true;
            newBookmark.bold = false;
            newBookmark.links = [bookmarkLink];
            newBookmark.color = bookmarkColor;
            newBookmark.action = "GoTo";
            newBookmark.level = 1;
            newBookmark.pageDisplayLeft = 83;
            newBookmark.pageDisplayTop = 751;
            newBookmark.pageDisplayZoom = 2;
            newBookmark.pageNumber = configParams.NEW_BOOKMARK_PAGE_NUMBER;

            const response = await pdfApi.postBookmark(configParams.PDF_DOCUMENT_NAME, configParams.PARENT_BOOKMARK_FOR_APPEND, [newBookmark]);
            const { code, bookmarks } = response.body;

            if (code === 200 && bookmarks) {
                const addedBookmark = bookmarks.list[bookmarks.list.length - 1];
                console.log("Appended bookmark: " + addedBookmark.links[0].href + " => " + addedBookmark.title);
                return addedBookmark;
            }
        },
    };

    async function main() {
        try {
            await pdfBookmarks.uploadDocument();
            await pdfBookmarks.appendBookmarkLink();
            await pdfBookmarks.downloadResult();
        } catch (error) {
            console.error("Error:", error.message);
        }
    }