mirror of
https://github.com/Frooodle/Stirling-PDF.git
synced 2025-10-25 11:17:28 +02:00
node based backend
This commit is contained in:
Felix Kaspar
parent
542d74b9cc
commit
76e37354e1
@ -12,6 +12,19 @@
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</head>
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<body>
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<input type="file" id="pdfFile" accept=".pdf">
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<a id="downloadLink" style="display: none;" download="modified.pdf">Download Modified PDF</a>
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<ul id="operations">
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</ul>
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<select id="pdfOptions">
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<option value="scaleContent">Scale Content</option>
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<option value="changePageSize">Change Page Size</option>
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<option value="mergePDFs">Merge PDFs</option>
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<option value="splitPDFs">Split PDFs</option>
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</select>
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<button id="addButton">Add</button>
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<button id="doneButton">Done</button>
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</body>
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</html>
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194
public/index.js
194
public/index.js
@ -1,16 +1,192 @@
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import { scaleContent } from "./functions/scaleContent.js";
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import { scalePage, PageSize } from "./functions/scalePage.js";
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import { organizeWaitOperations } from "./organizeWaitOperations.js";
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import { testWorkflow } from "./testWorkflow.js";
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(async () => {
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(async (workflow) => {
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const pdfFileInput = document.getElementById('pdfFile');
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const doneButton = document.getElementById("doneButton");
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pdfFileInput.addEventListener('change', async (e) => {
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const file = e.target.files[0];
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if (file) {
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let pdfBuffer = new Uint8Array(await file.arrayBuffer());
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pdfBuffer = await scaleContent(pdfBuffer, 2);
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pdfBuffer = await scalePage(pdfBuffer, PageSize.letter);
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download(pdfBuffer, "pdf-lib_creation_example.pdf", "application/pdf");
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doneButton.addEventListener('click', async (e) => {
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const files = Array.from(pdfFileInput.files);
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console.log(files);
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const pdfBuffers = await Promise.all(files.map(async file => {
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return {
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originalFileName: file.name.replace(/\.[^/.]+$/, ""),
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fileName: file.name.replace(/\.[^/.]+$/, ""),
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buffer: new Uint8Array(await file.arrayBuffer())
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}
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}));
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console.log(pdfBuffers);
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const waitOperations = organizeWaitOperations(workflow.operations);
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nextOperation(workflow.operations, pdfBuffers);
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async function nextOperation(operations, input) {
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if(Array.isArray(operations) && operations.length == 0) { // isEmpty
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console.log("operation done: " + input.fileName);
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//TODO: Download Restult
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return;
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}
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for (let i = 0; i < operations.length; i++) {
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console.warn(input);
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await computeOperation(operations[i], structuredClone(input)); // break references
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}
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}
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async function computeOperation(operation, input) {
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switch (operation.type) {
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case "done":
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console.log("Done operation will get called if all waits are done. Skipping for now.")
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break;
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case "wait":
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const waitOperation = waitOperations[operation.values.id];
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waitOperation.input.push(input);
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waitOperation.waitCount--;
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if(waitOperation.waitCount == 0) {
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await nextOperation(waitOperation.doneOperation.operations, waitOperation.input);
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}
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break;
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case "removeObjects":
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if(Array.isArray(input)) {
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for (let i = 0; i < input.length; i++) {
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// TODO: modfiy input
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input[i].fileName += "_removedObjects";
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await nextOperation(operation.operations, input[i]);
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}
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}
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else {
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// TODO: modfiy input
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input.fileName += "_removedObjects";
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await nextOperation(operation.operations, input);
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}
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break;
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case "extract":
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if(Array.isArray(input)) {
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for (let i = 0; i < input.length; i++) {
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// TODO: modfiy input
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input[i].fileName += "_extractedPages";
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await nextOperation(operation.operations, input[i]);
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}
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}
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else {
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// TODO: modfiy input
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input.fileName += "_extractedPages";
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await nextOperation(operation.operations, input);
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}
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break;
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case "fillField":
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if(Array.isArray(input)) {
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for (let i = 0; i < input.length; i++) {
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// TODO: modfiy input
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input[i].fileName += "_filledField";
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await nextOperation(operation.operations, input[i]);
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}
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}
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else {
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// TODO: modfiy input
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input.fileName += "_filledField";
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await nextOperation(operation.operations, input);
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}
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break;
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case "extractImages":
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if(Array.isArray(input)) {
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for (let i = 0; i < input.length; i++) {
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// TODO: modfiy input
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input[i].fileName += "_extractedImages";
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await nextOperation(operation.operations, input[i]);
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}
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}
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else {
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// TODO: modfiy input
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input.fileName += "_extractedImages";
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await nextOperation(operation.operations, input);
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}
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break;
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case "merge":
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if(Array.isArray(input)) {
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input = {
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originalFileName: input.map(input => input.originalFileName).join("_and_"),
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fileName: input.map(input => input.fileName).join("_and_") + "_merged",
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buffer: input[0].buffer // TODO: merge inputs
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}
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}
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else {
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// TODO: modfiy input
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input.fileName += "_merged";
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}
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await nextOperation(operation.operations, input);
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break;
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case "transform": {
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if(Array.isArray(input)) {
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for (let i = 0; i < input.length; i++) {
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// TODO: modfiy input
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input[i].fileName += "_transformed";
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await nextOperation(operation.operations, input[i]);
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}
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}
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else {
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// TODO: modfiy input
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input.fileName += "_transformed";
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await nextOperation(operation.operations, input);
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}
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break;
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}
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default:
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console.log("operation type unknown: ", operation.type);
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break;
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}
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}
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// if(selectedElementsList[0].textContent == "mergePDFs") {
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// }
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// // TODO: This can also be run serverside
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// if(files.length > 1) {
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// files.forEach(file => {
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// });
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// }
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// else {
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// const file = files[0];
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// let pdfBuffer = new Uint8Array(await file.arrayBuffer());
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// if (file) {
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// for (let i = 0; i < selectedElementsList.length; i++) {
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// const selectedOption = selectedElementsList[i];
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// // Perform actions based on the selected option using the switch statement
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// switch (selectedOption.textContent) {
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// case "scaleContent":
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// pdfBuffer = await scaleContent(pdfBuffer, 2);
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// break;
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// case "changePageSize":
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// pdfBuffer = await scalePage(pdfBuffer, PageSize.letter);
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// break;
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// default:
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// // Handle any other actions or errors here
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// throw new Error(`This action ${selectedOption.value} has not been implemented.`);
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// }
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// }
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// download(pdfBuffer, file.name.replace(/\.[^/.]+$/, "") + "_mod.pdf", "application/pdf");
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// }
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// }
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});
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})();
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// document.getElementById("addButton").addEventListener("click", function() {
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// const selectedOption = document.getElementById("pdfOptions").value;
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// const operations = document.getElementById("operations");
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// if (selectedOption) {
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// const listItem = document.createElement("li");
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// listItem.textContent = selectedOption;
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// operations.appendChild(listItem);
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// }
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// });
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})(testWorkflow);
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43
public/organizeWaitOperations.js
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43
public/organizeWaitOperations.js
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@ -0,0 +1,43 @@
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export function organizeWaitOperations(operations) {
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// Initialize an object to store the counts and associated "done" operations
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const waitCounts = {};
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const doneOperations = {};
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// Function to count "type: wait" operations and associate "done" operations per id
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function countWaitOperationsAndDone(operations) {
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for (const operation of operations) {
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if (operation.type === "wait") {
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const id = operation.values.id;
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if (id in waitCounts) {
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waitCounts[id]++;
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} else {
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waitCounts[id] = 1;
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}
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}
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if (operation.type === "done") {
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const id = operation.values.id;
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doneOperations[id] = operation;
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}
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if (operation.operations) {
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countWaitOperationsAndDone(operation.operations);
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}
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}
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}
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// Start counting and associating from the root operations
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countWaitOperationsAndDone(operations);
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// Combine counts and associated "done" operations
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const result = {};
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for (const id in waitCounts) {
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result[id] = {
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waitCount: waitCounts[id],
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doneOperation: doneOperations[id],
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input: []
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};
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}
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return result;
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}
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71
public/testWorkflow.js
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71
public/testWorkflow.js
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@ -0,0 +1,71 @@
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// JSON Representation of this Node Tree:
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// https://discord.com/channels/1068636748814483718/1099390571493195898/1118192754103693483
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// https://cdn.discordapp.com/attachments/1099390571493195898/1118192753759764520/image.png?ex=6537dba7&is=652566a7&hm=dc46820ef7c34bc37424794966c5f66f93ba0e15a740742c364d47d31ea119a9&
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export const testWorkflow = {
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outputOptions: {
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zip: false,
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awaitAllDone: true
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},
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operations: [
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{
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type: "extract",
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values: { "index": "1" },
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operations: [
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{
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type: "removeObjects",
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values: { "objectNames": "photo, josh" },
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operations: [
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{
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type: "wait",
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values: { "id": 1 }
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}
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]
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}
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]
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},
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{
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type: "extract",
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values: { "index": "2-5" },
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operations: [
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{
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type: "fillField",
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values: { "objectName": "name", "inputValue": "Josh" },
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operations: [
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{
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type: "wait",
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values: { "id": 1 }
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}
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]
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}
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]
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},
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{
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type: "done", // This gets called when the other merge-ops with the same id finish.
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values: { "id": 1 },
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operations: [
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{
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type: "merge", // This gets called when the other merge-ops with the same id finish.
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values: {},
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operations: []
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}
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]
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},
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{
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type: "extractImages",
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values: {},
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operations: []
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},
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{
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type: "merge", // This gets called when the other merge-ops with the same id finish.
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values: {},
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operations: [
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{
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type: "transform",
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values: { "scale": "2x", "rotation": "90deg" },
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operations: []
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}
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]
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}
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]
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}
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