restructured project (shared-operations)

client-vanilla/functions.js

@@ -2,7 +2,8 @@
 // PDFJS as pdfjsLib via index.html script-tag
 // jsQR via index.html script-tag
 
-import * as pdfcpuWraopper from "./wasm/pdfcpu-wrapper-browser.js";
+import * as pdfcpuWraopper from "./wasm/pdfcpu/pdfcpu-wrapper-browser.js";
+
 const OpenCV = { cv: cv } // OPENCV gets importet as cv via index.html script-tag
 
 import { extractPages as dependantExtractPages } from "./functions/extractPages.js";
@@ -17,6 +18,8 @@ import { organizePages as dependantOrganizePages} from "./functions/organizePage
 import { removeBlankPages as dependantRemoveBlankPages} from "./functions/removeBlankPages.js";
 import { splitOn as dependantSplitOn } from "./functions/splitOn.js";
 
+// TODO: Dynamic loading & undloading of libraries.
+
 export async function extractPages(snapshot, pagesToExtractArray) {
     return dependantExtractPages(snapshot, pagesToExtractArray, PDFLib);
 }

client-vanilla/index.js

@@ -12,7 +12,6 @@ import * as Functions from "./functions.js";
         console.log("Starting...");
 
         const files = Array.from(pdfFileInput.files);
-        console.log(files);
         const inputs = await Promise.all(files.map(async file => {
             return {
                 originalFileName: file.name.replace(/\.[^/.]+$/, ""),

index.js

@@ -1,12 +1,13 @@
 
-import api from './routes/api/index.js';
+import api from './server-node/routes/api/index.js';
 
 import express from 'express';
 const app = express();
 const PORT = 8080;
  
 // Static Middleware
-app.use(express.static('./public'));
+app.use(express.static('./client-vanilla'));
+app.use(express.static('./shared-operations'));
  
 app.get('/', function (req, res, next) { // TODO: Use EJS?
     res.render('home.ejs');

server-node/functions.js

@@ -3,20 +3,20 @@ import PDFJS from "pdfjs-dist";
 import jsQR from "jsqr";
 
 delete global.crypto; // TODO: I hate to do this, but the new node version forces me to, if anyone finds a better solution, please tell me!
-import * as pdfcpuWraopper from "./public/wasm/pdfcpu-wrapper-node.js";
+import * as pdfcpuWraopper from "../shared-operations/wasm/pdfcpu/pdfcpu-wrapper-node.js";
 import OpenCV from 'opencv-wasm';
 
-import { extractPages as dependantExtractPages } from "./public/functions/extractPages.js";
-import { impose as dependantImpose } from './public/functions/impose.js';
-import { mergePDFs as dependantMergePDFs } from './public/functions/mergePDFs.js';
-import { rotatePages as dependantRotatePages } from './public/functions/rotatePages.js';
-import { scaleContent as dependantScaleContent} from './public/functions/scaleContent.js';
-import { scalePage as dependantScalePage } from './public/functions/scalePage.js';
-import { splitPDF as dependantSplitPDF } from './public/functions/splitPDF.js';
-import { editMetadata as dependantEditMetadata } from './public/functions/editMetadata.js';
-import { organizePages as dependantOrganizePages } from './public/functions/organizePages.js';
-import { removeBlankPages as dependantRemoveBlankPages} from './public/functions/removeBlankPages.js';
-import { splitOn as dependantSplitOn } from "./public/functions/splitOn.js";
+import { extractPages as dependantExtractPages } from "../shared-operations/functions/extractPages.js";
+import { impose as dependantImpose } from '../shared-operations/functions/impose.js';
+import { mergePDFs as dependantMergePDFs } from '../shared-operations/functions/mergePDFs.js';
+import { rotatePages as dependantRotatePages } from '../shared-operations/functions/rotatePages.js';
+import { scaleContent as dependantScaleContent} from '../shared-operations/functions/scaleContent.js';
+import { scalePage as dependantScalePage } from '../shared-operations/functions/scalePage.js';
+import { splitPDF as dependantSplitPDF } from '../shared-operations/functions/splitPDF.js';
+import { editMetadata as dependantEditMetadata } from '../shared-operations/functions/editMetadata.js';
+import { organizePages as dependantOrganizePages } from '../shared-operations/functions/organizePages.js';
+import { removeBlankPages as dependantRemoveBlankPages} from '../shared-operations/functions/removeBlankPages.js';
+import { splitOn as dependantSplitOn } from "../shared-operations/functions/splitOn.js";
 
 export async function extractPages(snapshot, pagesToExtractArray) {
     return dependantExtractPages(snapshot, pagesToExtractArray, PDFLib);

server-node/routes/api/workflow.js

@@ -4,7 +4,7 @@ import stream from "stream";
 import Archiver from 'archiver';
 
 import * as Functions from "../../functions.js";
-import { traverseOperations } from "../../public/traverseOperations.js";
+import { traverseOperations } from "../../../shared-operations/traverseOperations.js";
 
 const activeWorkflows = {};
 
@@ -17,7 +17,12 @@ router.post("/:workflowUuid?", [
             return;
         }
 
-        req.files = Array.from(req.files.files); // Convert single values to array, keep arrays as is.
+        if(Array.isArray(req.files.files)) {
+            req.files = req.files.files;
+        }
+        else {
+            req.files = [req.files.files];
+        }
 
         const workflow = JSON.parse(req.body.workflow);
         // TODO: Validate input further (json may fail or not be a valid workflow)

shared-operations/functions/splitOn.js

@@ -75,10 +75,11 @@ export async function splitOn(snapshot, type, whiteThreashold, PDFJS, OpenCV, PD
 
         const pagesWithQR = [];
         for (let i = 0; i < pdfDoc.numPages; i++) {
+            console.log("Page:", i, "/", pdfDoc.numPages);
             const page = await pdfDoc.getPage(i + 1);
 
             const images = await getImagesOnPage(page, PDFJS);
-
+            console.log("images:", images);
             for (const image of images) {
                 const data = await checkForQROnImage(image);
                 if(data == "https://github.com/Frooodle/Stirling-PDF") {
@@ -86,12 +87,16 @@ export async function splitOn(snapshot, type, whiteThreashold, PDFJS, OpenCV, PD
                 }
             }
         }
+        if(pagesWithQR.length == 0) {
+            console.warn("Could not find any QR Codes in the provided PDF.")
+        }
         return pagesWithQR;
     }
 
     async function checkForQROnImage(image) {
         // TODO: There is an issue with the jsQR package (The package expects rgba but sometimes we have rgb), and the package seems to be stale, we could create a fork and fix the issue. In the meanwhile we just force rgba:
         // Check for rgb and convert to rgba
+
         if(image.data.length == image.width * image.height * 3) {
             const tmpArray = new Uint8ClampedArray(image.width * image.height * 4);
 

shared-operations/wasm/pdfcpu/pdfcpu-wrapper-browser.js

@@ -1,10 +1,11 @@
-// TODO: Uses the BrowserFS import, needs to be changed for serverside
+// imports browserfs via index.html script-tag
 
-let wasmLocation = "/wasm/";
+let wasmLocation = "/wasm/pdfcpu/";
 
 let fs;
 let Buffer;
 
+// TODO: This can later be defered to load asynchronously
 configureFs();
 loadWasm();
 

shared-operations/wasm/pdfcpu/pdfcpu-wrapper-node.js

@@ -1,5 +1,3 @@
-// TODO: Uses the BrowserFS import, needs to be changed for serverside
-
 import { WasmFs } from '@wasmer/wasmfs';
 import path from "path";
 
@@ -9,6 +7,7 @@ let nodeWasmLocation = "./public/wasm/";
 let fs;
 const wasmfs = new WasmFs();
 
+// TODO: This can later be defered to load asynchronously
 (async () => {
     await loadWasm();
     await configureFs();