Made split pdf functions conform to the new design pattern.

shared-operations/src/functions/common/detectQRCodePages.ts

@@ -0,0 +1,55 @@
+
+import jsQR from "jsqr";
+
+import { PdfFile } from '../../wrappers/PdfFile.js';
+import { getImagesOnPage, PDFJSImage } from "./getImagesOnPage.js";
+
+export async function detectQRCodePages(file: PdfFile) {
+    console.log("FileInQRPrev: ", file);
+    const pdfDoc = await file.pdfJsDocument;
+    console.log("FileInQRAfter: ", file);
+
+    const pagesWithQR: number[] = [];
+    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);
+        // console.log("images:", images);
+        for (const image of images) {
+            const data = await checkForQROnImage(image);
+            if(data == "https://github.com/Frooodle/Stirling-PDF") {
+                pagesWithQR.push(i);
+            }
+        }
+    }
+    if(pagesWithQR.length == 0) {
+        console.warn("Could not find any QR Codes in the provided PDF.")
+    }
+    return pagesWithQR;
+}
+
+async function checkForQROnImage(image: any) {
+    // 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);
+
+        // Iterate through the original array and add an alpha channel
+        for (let i = 0, j = 0; i < image.data.length; i += 3, j += 4) {
+            tmpArray[j] = image.data[i];     // Red channel
+            tmpArray[j + 1] = image.data[i + 1]; // Green channel
+            tmpArray[j + 2] = image.data[i + 2]; // Blue channel
+            tmpArray[j + 3] = 255;               // Alpha channel (fully opaque)
+        }
+
+        image.data = tmpArray;
+    }
+
+    const code = jsQR(image.data, image.width, image.height);
+    if(code)
+        return code.data;
+    else
+        return null;
+}

shared-operations/src/functions/common/splitPagesByIndex.ts

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+
+import { PdfFile } from '../../wrappers/PdfFile.js';
+import { getPages } from "./getPagesByIndex";
+
+export async function splitPagesByIndex(file: PdfFile, splitAfterPageIndexes: number[]): Promise<PdfFile[]> {
+    const pdfLibDocument = await file.pdfLibDocument;
+    const numberOfPages = pdfLibDocument.getPages().length;
+
+    let pagesArray: number[]  = [];
+    let splitAfter = splitAfterPageIndexes.shift();
+    const subDocuments: PdfFile[]  = [];
+
+    for (let i = 0; i < numberOfPages; i++) {
+        if(splitAfter && i > splitAfter && pagesArray.length > 0) {
+            subDocuments.push(await getPages(file, pagesArray));
+            splitAfter = splitAfterPageIndexes.shift();
+            pagesArray = [];
+        }
+        pagesArray.push(i);
+    }
+    subDocuments.push(await getPages(file, pagesArray));
+    pagesArray = [];
+
+    return subDocuments;
+};