restructured project (shared-operations)

shared-operations/functions/removeBlankPages.js

@@ -0,0 +1,17 @@
+import { detectEmptyPages } from "./shared/detectEmptyPages.js";
+
+export async function removeBlankPages(snapshot, whiteThreashold, PDFJS, OpenCV, PDFLib) {
+    
+    const emptyPages = await detectEmptyPages(snapshot, whiteThreashold, PDFJS, OpenCV);
+
+    console.log("Empty Pages: ", emptyPages);
+
+    const pdfDoc = await PDFLib.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();
+};