Mirrors/Stirling-PDF
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Fixed downloading buffer, merging workflow

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This commit is contained in:
Felix Kaspar 2023-10-17 02:14:06 +02:00
parent 96bac91fa1
commit 8e8c4596bf
5 changed files with 54 additions and 23 deletions
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22
public/testWorkflow.js → public/exampleWorkflows.js
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@ -1,8 +1,7 @@
// JSON Representation of this Node Tree:
// https://discord.com/channels/1068636748814483718/1099390571493195898/1118192754103693483
// https://cdn.discordapp.com/attachments/1099390571493195898/1118192753759764520/image.png?ex=6537dba7&is=652566a7&hm=dc46820ef7c34bc37424794966c5f66f93ba0e15a740742c364d47d31ea119a9&
export const testWorkflow = {
export const discordWorkflow = {
outputOptions: {
zip: false,
awaitAllDone: true
@ -45,7 +44,7 @@ export const testWorkflow = {
values: { "id": 1 },
operations: [
{
type: "merge", // This gets called when the other merge-ops with the same id finish.
type: "merge",
values: {},
operations: []
}
@ -57,7 +56,7 @@ export const testWorkflow = {
operations: []
},
{
type: "merge", // This gets called when the other merge-ops with the same id finish.
type: "merge",
values: {},
operations: [
{
@ -69,3 +68,18 @@ export const testWorkflow = {
}
]
}
// This will merge all input files into one giant document
export const mergeOnly = {
outputOptions: {
zip: false,
awaitAllDone: true
},
operations: [
{
type: "merge",
values: {},
operations: []
}
]
}

15
public/functions/mergePDFs.js Normal file
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@ -0,0 +1,15 @@
const { PDFDocument, ParseSpeeds } = PDFLib;
export const mergePDFs = async (snapshots) => {
const mergedPdf = await PDFDocument.create();
for (let i = 0; i < snapshots.length; i++) {
const pdfToMerge = await PDFDocument.load(snapshots[i]);
const copiedPages = await mergedPdf.copyPages(pdfToMerge, pdfToMerge.getPageIndices());
copiedPages.forEach((page) => mergedPdf.addPage(page));
}
return mergedPdf.save();
};

2
public/index.html
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@ -11,7 +11,7 @@
<script src="index.js" type="module"></script>
</head>
<body>
<input type="file" id="pdfFile" accept=".pdf">
<input type="file" id="pdfFile" accept=".pdf" multiple>
<ul id="operations">

18
public/index.js
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@ -1,6 +1,6 @@
import { scaleContent } from "./functions/scaleContent.js";
import { scalePage, PageSize } from "./functions/scalePage.js";
import { testWorkflow } from "./testWorkflow.js";
import * as exampleWorkflows from "./exampleWorkflows.js";
import { traverseOperations } from "./traverseOperations.js";
(async (workflow) => {
@ -10,22 +10,22 @@ import { traverseOperations } from "./traverseOperations.js";
doneButton.addEventListener('click', async (e) => {
const files = Array.from(pdfFileInput.files);
console.log(files);
const pdfBuffers = await Promise.all(files.map(async file => {
const inputs = await Promise.all(files.map(async file => {
return {
originalFileName: file.name.replace(/\.[^/.]+$/, ""),
fileName: file.name.replace(/\.[^/.]+$/, ""),
buffer: new Uint8Array(await file.arrayBuffer())
}
}));
console.log(pdfBuffers);
console.log(inputs);
await traverseOperations(workflow.operations, pdfBuffers);
// TODO: This can also be run serverside
const results = await traverseOperations(workflow.operations, inputs);
// if(selectedElementsList[0].textContent == "mergePDFs") {
results.forEach(result => {
download(result.buffer, result.fileName, "application/pdf");
});
// }
// // TODO: This can also be run serverside
// if(files.length > 1) {
// files.forEach(file => {
@ -55,4 +55,4 @@ import { traverseOperations } from "./traverseOperations.js";
// }
// }
});
})(testWorkflow);
})(exampleWorkflows.mergeOnly);

18
public/traverseOperations.js
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@ -1,15 +1,16 @@
import { mergePDFs } from "./functions/mergePDFs.js";
import { organizeWaitOperations } from "./organizeWaitOperations.js";
export async function traverseOperations(operations, input) {
const waitOperations = organizeWaitOperations(operations);
const results = [];
await nextOperation(operations, input);
return results;
async function nextOperation(operations, input) {
if(Array.isArray(operations) && operations.length == 0) { // isEmpty
console.log("operation done: " + input.fileName);
//TODO: Delay the download
download(input, input.fileName, "application/pdf");
results.push(input);
return;
}
@ -89,15 +90,16 @@ export async function traverseOperations(operations, input) {
}
break;
case "merge":
if(Array.isArray(input)) {
if(Array.isArray(input) && input.length > 1) {
const inputs = input;
input = {
originalFileName: input.map(input => input.originalFileName).join("_and_"),
fileName: input.map(input => input.fileName).join("_and_") + "_merged",
buffer: input[0].buffer // TODO: merge inputs
originalFileName: inputs.map(input => input.originalFileName).join("_and_"),
fileName: inputs.map(input => input.fileName).join("_and_") + "_merged",
buffer: await mergePDFs(inputs.map(input => input.buffer))
}
}
else {
// TODO: modfiy input
// Only one input, no need to merge
input.fileName += "_merged";
}
await nextOperation(operation.operations, input);