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Merge pull request #133 from aspose-pdf-cloud/pdfcloud-5009-added-snippets-rotate-resize-xrop
PDFCLOUD-5009: added snippets rotate-resize-crop
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‎UsesCases/ChangeLayout/changeLayoutHelper.js‎

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import credentials from "../../../Credentials/credentials.json" with { type: "json" }; // json-file in this format: { "id": "*****", "key": "*******" }
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import fs from 'node:fs/promises';
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import path from 'node:path';
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import { PdfApi } from "../../src/api/api.js";
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import { Rotation } from "../../src/models/rotation.js";
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import { DocumentConfig } from "../../src/models/documentConfig.js"
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import { DocumentProperties } from "../../src/models/documentProperties.js"
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import { DocumentProperty } from "../../src/models/documentProperty.js"
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import { DisplayProperties } from "../../src/models/displayProperties.js"
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import { DefaultPageConfig } from "../../src/models/defaultPageConfig.js"
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import { ImageStamp } from "../../src/models/imageStamp.js"
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import { HorizontalAlignment } from "../../src/models/horizontalAlignment.js"
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import { VerticalAlignment } from "../../src/models/verticalAlignment.js"
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import { HtmlDocumentType } from "../../src/models/htmlDocumentType.js";
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import { OutputFormat } from "../../src/models/outputFormat.js"
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export { configParams, pdfApi, PdfChangeLayoutHelper };
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const configParams = {
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LOCAL_FOLDER: "C:\\Samples\\",
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PDF_DOCUMENT_NAME: "sample.pdf",
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TEMP_FOLDER: 'TempPdfCloud',
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ROTATE_ANGLE: Rotation.on90,
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ROTATE_PAGES: "1-3",
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CROP_PAGE_TEMP_FILE: "sammple_temp_file.png",
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CROP_LOCAL_RESULT_DOCUMENT_NAME: "output_sample.pdf",
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CROP_PAGE_NUMBER: 3,
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CROP_PAGE_WIDTH: 0,
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CROP_PAGE_HEIGHT: 0,
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CROP_HEIGHT: 400,
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CROP_WIDTH: 300,
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CROP_LLX: 100,
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CROP_LLY: 200,
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RESIZE_PDF_HTML_FILE: "sammple_temp_file.html",
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RESIZE_RESULT_DOCUMENT_NAME:"output_sample.pdf",
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RESIZE_PAGE_NUMBER: 2,
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RESIZE_NEW_PAGE_WIDTH: 1000,
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RESIZE_NEW_PAGE_HEIGHT: 3000,
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};
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const pdfApi = new PdfApi(credentials.id, credentials.key);
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const PdfChangeLayoutHelper = {
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async uploadFile (fileName, localFolder, tempFolder) {
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const fileNamePath = path.join(localFolder, fileName);
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const fileData = await fs.readFile(fileNamePath);
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const storagePath = path.join(tempFolder, fileName);
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await pdfApi.uploadFile(storagePath, fileData)
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.then(() => console.log("File: '" + fileName +"' successfully uploaded."));
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},
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async uploadDocument(document, localFolder, tempFolder) {
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await this.uploadFile(document, localFolder, tempFolder)
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},
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async downloadResult(document, localFolder, tempFolder, prefix) {
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const fileName = path.join(tempFolder, document);
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const changedPdfData = await pdfApi.downloadFile(fileName);
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const filePath = path.join(localFolder, prefix + document);
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await fs.writeFile(filePath, changedPdfData.body);
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console.log("Downloaded: " + filePath);
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},
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async getPageInfo (document, pageNumber, tempFolder) {
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const resultPages = await pdfApi.getPage( document, pageNumber, { folder: tempFolder } );
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if (resultPages.body.code == 200 && resultPages.body.page) {
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this.showPages( [ resultPages.body.page ], "page");
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configParams.PAGE_HEIGHT = resultPages.body.page.rectangle.uRY - resultPages.body.page.rectangle.lLY;
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configParams.PAGE_WIDTH = resultPages.body.page.rectangle.uRX - resultPages.body.page.rectangle.lLX;
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return {
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"width": configParams.PAGE_WIDTH,
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"height": configParams.PAGE_HEIGHT
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}
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}
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else {
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console.error("Unexpected error : can't get pages!!!");
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return null;
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}
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},
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showPages (pages, prefix) {
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if (Array.isArray(pages) && pages.length > 0)
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{
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pages.forEach(function(page) {
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console.log(prefix +" => id: '" + page.id + "', lLx: '" + page.rectangle.lLX + "', lLY: '" + page.rectangle.lLY + "', uRX: '" + page.rectangle.uRX + "', uRY: '" + page.rectangle.uRY + "'");
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});
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}
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else
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console.error("showPages() error: array of pages is empty!")
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},
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async extractPdfPage(document, pageNumber, width, height, localFolder, tempFolder) {
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const response = await pdfApi.getPageConvertToPng(document, pageNumber, Math.trunc(width), Math.trunc(height), tempFolder);
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if (response.response.status != 200)
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{
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console.error("extractPdfPage(): Faild to convert page to image!");
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return null;
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}
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const filePath = path.join(localFolder, document + ".png");
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await fs.writeFile(filePath, response.body);
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const imageFile = document + ".png";
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const imagePath = localFolder;
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await this.uploadFile(imageFile, localFolder, tempFolder);
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console.log("Page #" + pageNumber + " extracted as image.");
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return imageFile;
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},
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async createPdfDocument(document, width, height, tempFolder) {
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const pdfConfig = new DocumentConfig();
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pdfConfig.pagesCount = 1;
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pdfConfig.displayProperties = new DisplayProperties();
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pdfConfig.displayProperties.centerWindow = true;
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pdfConfig.displayProperties.hideMenuBar = true;
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pdfConfig.documentProperties = new DocumentProperties();
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const docProperty = new DocumentProperty();
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docProperty.builtIn = false;
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docProperty.name = "prop1";
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docProperty.value = "Val1";
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pdfConfig.documentProperties.list = [ docProperty ];
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pdfConfig.defaultPageConfig = new DefaultPageConfig();
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pdfConfig.defaultPageConfig.height = height;
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pdfConfig.defaultPageConfig.width = width;
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const response = await pdfApi.postCreateDocument(document, pdfConfig, null, tempFolder);
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console.log("Document #" + document + " created.")
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return response;
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},
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async insertPageAsImage(document, imageFileValue, llx, lly, tempFolder) {
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const stamp = new ImageStamp();
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stamp.background = true;
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stamp.horizontalAlignment = HorizontalAlignment.None;
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stamp.verticalAlignment = VerticalAlignment.None;
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stamp.opacity = 1;
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stamp.rotate = Rotation.None;
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stamp.rotateAngle = 0;
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stamp.xIndent = -llx;
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stamp.yIndent = -lly;
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stamp.zoom = 1;
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stamp.fileName = configParams.TEMP_FOLDER + '/' + imageFileValue;
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const response = await pdfApi.postPageImageStamps(document, 1, [stamp], null, tempFolder);
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console.log("Image iserted into '" + document + "document on page #1");
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return response;
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},
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};

‎UsesCases/ChangeLayout/changeLayoutLaunch.js‎

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import { configParams } from "./changeLayoutHelper.js";
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import { PdfRotatePages } from "./rotatePageStdAngle.js"
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import { PdfCropPage } from "./cropPage.js";
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import { PdfResizePages } from "./resizeDocumentAllPages.js";
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async function main() {
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try {
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await PdfRotatePages.rotate(configParams.PDF_DOCUMENT_NAME,
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configParams.ROTATE_ANGLE, configParams.ROTATE_PAGES,
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configParams.LOCAL_FOLDER, configParams.TEMP_FOLDER);
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await PdfCropPage.cropPage(configParams.PDF_DOCUMENT_NAME,
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configParams.CROP_PAGE_NUMBER, configParams.CROP_LLX, configParams.CROP_LLY, configParams.CROP_WIDTH, configParams.CROP_HEIGHT, configParams.CROP_LOCAL_RESULT_DOCUMENT_NAME,
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configParams.LOCAL_FOLDER, configParams.TEMP_FOLDER);
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await PdfResizePages.resizeAllPages(configParams.PDF_DOCUMENT_NAME,
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configParams.RESIZE_PDF_HTML_FILE, configParams.RESIZE_NEW_PAGE_WIDTH, configParams.RESIZE_NEW_PAGE_HEIGHT, configParams.RESIZE_RESULT_DOCUMENT_NAME,
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configParams.LOCAL_FOLDER, configParams.TEMP_FOLDER);
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} catch (error) {
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console.error("Error:", error.message);
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}
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}
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await main();

‎UsesCases/ChangeLayout/cropPage.js‎

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import { PdfChangeLayoutHelper, pdfApi } from "./changeLayoutHelper.js";
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export { PdfCropPage };
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const PdfCropPage = {
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async cropPage(document, pageNumber, llx, lly, width, height, outputDocument, localFolder, tempFolder) {
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if ( pdfApi ) {
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await PdfChangeLayoutHelper.uploadDocument(document, localFolder, tempFolder);
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var pageSie = await PdfChangeLayoutHelper.getPageInfo(document, pageNumber, tempFolder);
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const imageFile = await PdfChangeLayoutHelper.extractPdfPage(document, pageNumber, pageSie.width, pageSie.height, localFolder, tempFolder);
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const newPdf = await PdfChangeLayoutHelper.createPdfDocument(outputDocument, width, height, tempFolder);
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if (newPdf.body.code != 200) {
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console.error("cropPage(): Failed to create new PDF document!");
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return;
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}
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const response = await PdfChangeLayoutHelper.insertPageAsImage(outputDocument, imageFile, llx, lly, tempFolder);
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if (response.body.code == 200) {
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console.log("cropPage(): Page successfully cropped.");
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await PdfChangeLayoutHelper.downloadResult(outputDocument, localFolder, tempFolder, "cropped_")
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}
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else
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console.error("cropPage(): Can't crop pdf document page!")
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}
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},
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};

‎UsesCases/ChangeLayout/resizeDocumentAllPages.js‎

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import { PdfChangeLayoutHelper, pdfApi } from "./changeLayoutHelper.js";
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import path from 'node:path';
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import { HtmlDocumentType } from "../../src/models/htmlDocumentType.js";
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import { OutputFormat } from "../../src/models/outputFormat.js"
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export { PdfResizePages }
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const PdfResizePages = {
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async resizeAllPages(document, htmlTempDoc, width, height, outputDocument, localFolder, tempFolder) {
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await PdfChangeLayoutHelper.uploadDocument(document, localFolder, tempFolder)
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const htmlTempPath = path.join(tempFolder, htmlTempDoc);
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const html_response = await pdfApi.putPdfInStorageToHtml(
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document,
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htmlTempPath,
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null, null, null, null,
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HtmlDocumentType.Xhtml,
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null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null,
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tempFolder,
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null, null,
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OutputFormat.Folder);
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if (html_response.body.code != 200) {
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console.error("resizePages(): Can't convert pdf to html!");
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return;
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}
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else
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console.log("resizePages(): temporary file '" + htmlTempDoc + "' succesfully creaated.")
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const response = await pdfApi.putHtmlInStorageToPdf(
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outputDocument,
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htmlTempPath,
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htmlTempDoc,
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height,
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width,
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null, null, null, null, null,
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tempFolder,
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null);
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if (response.body.code == 200) {
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console.log("resizePages(): Pages successfully resized.");
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await PdfChangeLayoutHelper.downloadResult(outputDocument, localFolder, tempFolder, "resized_doc_");
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}
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else
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console.log("resizePages(): Can't convert html to pdf!")
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},
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};

‎UsesCases/ChangeLayout/rotatePageStdAngle.js‎

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import { PdfChangeLayoutHelper, pdfApi } from "./changeLayoutHelper.js";
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export { PdfRotatePages };
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const PdfRotatePages = {
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async rotate(document, angle, pages, localFolder, tempFolder) {
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if ( pdfApi) {
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await PdfChangeLayoutHelper.uploadDocument(document, localFolder, tempFolder);
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const response = await pdfApi.postDocumentPagesRotate(
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document, angle, pages, null, tempFolder);
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if (response.body.code == 200) {
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console.log("rotatePages(): Page successfully rotated.");
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await PdfChangeLayoutHelper.downloadResult(document, localFolder, tempFolder, "rotated_output_");
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}
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else
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console.error("rotatePages(): Can't rotate pdf document pages!")
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}
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},
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};

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