From 43cc832274561310e625ee7b84a258a9beb72eb9 Mon Sep 17 00:00:00 2001
From: Rodrigo Martins <rodrigo.sousa.577@gmail.com>
Date: Tue, 22 Apr 2025 15:19:48 -0300
Subject: [PATCH] tenta fix pdfservice.js

---
 src/server/services/PdfService.ts | 36 +++++++++++++++++++++++++++++--
 1 file changed, 34 insertions(+), 2 deletions(-)

diff --git a/src/server/services/PdfService.ts b/src/server/services/PdfService.ts
index 206a59d..067e012 100644
--- a/src/server/services/PdfService.ts
+++ b/src/server/services/PdfService.ts
@@ -1,4 +1,7 @@
 import puppeteer from 'puppeteer';
+import { PDFDocument } from 'pdf-lib';
+import fs from 'fs/promises';
+import path from 'path';
 import { prisma } from '../prismaClient';
 
 // Função utilitária para converter pixels em milímetros (1px ≈ 0.264583 mm)
@@ -103,7 +106,7 @@ export class PdfService {
     `;
   }
 
-  // Gera PDF a partir do HTML, respeitando margens e timbrado
+  // Gera PDF a partir do HTML, depois sobrepõe o timbrado em cada página
   async gerarPDF(conteudo: string) {
     try {
       const config = await this.getConfiguracao();
@@ -128,7 +131,36 @@ export class PdfService {
         preferCSSPageSize: true
       });
       await browser.close();
-      return Buffer.from(pdfBuffer);
+
+      // Se não houver timbrado, retorna direto
+      if (!config.timbradoUrl) {
+        return Buffer.from(pdfBuffer);
+      }
+
+      // Caminho absoluto do PDF de timbrado
+      const timbradoPath = config.timbradoUrl.startsWith('/uploads')
+        ? path.join(process.cwd(), 'public', config.timbradoUrl)
+        : path.join(process.cwd(), 'public', 'uploads', path.basename(config.timbradoUrl));
+      let timbradoBytes: Buffer;
+      try {
+        timbradoBytes = await fs.readFile(timbradoPath);
+      } catch (e) {
+        console.error('Timbrado não encontrado:', timbradoPath);
+        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() });
+      }
+      const mergedPdf = await pdfDoc.save();
+      return Buffer.from(mergedPdf);
     } catch (error) {
       console.error('Erro ao gerar PDF:', error);
       throw new Error('Falha ao gerar PDF');