Merge branch 'stirling-pdf-rewrite' into version-2

shared-operations/functions/removeBlankPages.js

@@ -0,0 +1,18 @@
+import { PDFDocument } from 'pdf-lib';
+import { detectEmptyPages } from "./detectEmptyPages.js";
+
+export async function removeBlankPages(snapshot, whiteThreashold, OpenCV) {
+    
+    const emptyPages = await detectEmptyPages(snapshot, whiteThreashold, OpenCV);
+
+    console.log("Empty Pages: ", emptyPages);
+
+    const pdfDoc = await PDFDocument.load(snapshot);
+
+    // Reverse the array before looping in order to keep the indecies at the right pages. E.g. if you delete page 5 page 7 becomes page 6, if you delete page 7 page 5 remains page 5
+    emptyPages.reverse().forEach(pageIndex => {
+        pdfDoc.removePage(pageIndex);
+    })
+
+    return pdfDoc.save();
+};