backend: fix PDFService.ts

src/server/services/PdfService.ts

@@ -187,19 +187,9 @@ export class PdfService {
         return Buffer.from(pdfBuffer);
       }
 
-      // Mescla cada página do PDF gerado com o timbrado
-      const pdfDoc = await PDFDocument.load(pdfBuffer);
-      const timbradoDoc = await PDFDocument.load(timbradoBytes);
-      const timbradoPage = timbradoDoc.getPage(0);
-      const [timbradoEmbed] = await pdfDoc.embedPages([timbradoPage]);
-      const pageCount = pdfDoc.getPageCount();
-      for (let i = 0; i < pageCount; i++) {
-        const page = pdfDoc.getPage(i);
-        page.drawPage(timbradoEmbed, { x: 0, y: 0, width: page.getWidth(), height: page.getHeight() });
-      }
-      // Após mesclar o timbrado
+      // Remove página vazia do final ANTES de mesclar o timbrado
+      let pdfDoc = await PDFDocument.load(pdfBuffer);
       let pageCountBefore = pdfDoc.getPageCount();
-      // Remove apenas a ÚLTIMA página se ela estiver realmente vazia (sem conteúdo)
       if (pageCountBefore > 1) {
         const lastPage = pdfDoc.getPage(pageCountBefore - 1);
         const contentStreams = (lastPage as any).node.Contents?.();
@@ -208,7 +198,6 @@ export class PdfService {
         if (!contentStreams) {
           isBlank = true;
         } else if (Array.isArray(contentStreams)) {
-          // Se todos os streams são vazios ou muito pequenos
           isBlank = contentStreams.every(
             (stream: any) =>
               !stream.contents ||
@@ -222,6 +211,17 @@ export class PdfService {
           pdfDoc.removePage(pageCountBefore - 1);
         }
       }
+
+      // Agora sim, mescle o timbrado nas páginas restantes
+      const timbradoDoc = await PDFDocument.load(timbradoBytes);
+      const timbradoPage = timbradoDoc.getPage(0);
+      const [timbradoEmbed] = await pdfDoc.embedPages([timbradoPage]);
+      const pageCount = pdfDoc.getPageCount();
+      for (let i = 0; i < pageCount; i++) {
+        const page = pdfDoc.getPage(i);
+        page.drawPage(timbradoEmbed, { x: 0, y: 0, width: page.getWidth(), height: page.getHeight() });
+      }
+
       const mergedPdf = await pdfDoc.save();
       return Buffer.from(mergedPdf);
     } catch (error) {