chore: remove duplicates

packages/lib/server-only/pdf/render-pdf-to-image.ts

@@ -0,0 +1,61 @@
+import { createRequire } from 'node:module';
+import { fileURLToPath } from 'node:url';
+import { Canvas, Image } from 'skia-canvas';
+
+const require = createRequire(import.meta.url || fileURLToPath(new URL('.', import.meta.url)));
+const Module = require('node:module');
+
+const originalRequire = Module.prototype.require;
+Module.prototype.require = function (path: string) {
+  if (path === 'canvas') {
+    return {
+      createCanvas: (width: number, height: number) => new Canvas(width, height),
+      Image, // needed by pdfjs-dist
+    };
+  }
+  // eslint-disable-next-line prefer-rest-params, @typescript-eslint/consistent-type-assertions
+  return originalRequire.apply(this, arguments as unknown as [string]);
+};
+
+// Use dynamic require to bypass Vite SSR transformation
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const pdfjsLib = require('pdfjs-dist/legacy/build/pdf.js');
+
+export const renderPdfToImage = async (pdfBytes: Uint8Array) => {
+  const loadingTask = pdfjsLib.getDocument({ data: pdfBytes });
+  const pdf = await loadingTask.promise;
+
+  try {
+    const scale = 4;
+
+    const pages = await Promise.all(
+      Array.from({ length: pdf.numPages }, async (_, index) => {
+        const pageNumber = index + 1;
+        const page = await pdf.getPage(pageNumber);
+
+        try {
+          const viewport = page.getViewport({ scale });
+
+          const virtualCanvas = new Canvas(viewport.width, viewport.height);
+          const context = virtualCanvas.getContext('2d');
+          context.imageSmoothingEnabled = false;
+
+          await page.render({ canvasContext: context, viewport }).promise;
+
+          return {
+            image: await virtualCanvas.toBuffer('png'),
+            pageNumber,
+            width: Math.floor(viewport.width),
+            height: Math.floor(viewport.height),
+          };
+        } finally {
+          page.cleanup();
+        }
+      }),
+    );
+
+    return pages;
+  } finally {
+    await pdf.destroy();
+  }
+};