Migrando xlsx a exceljs

src/email/email.controller.ts

@@ -16,7 +16,6 @@ import { FileInterceptor } from '@nestjs/platform-express';
 import { EmailDto } from './dto/emailDto.dto';
 import { EmailService } from './email.service';
 import { Response } from 'express';
-import * as xlsx from 'xlsx';
 import { AuthGuard } from '@nestjs/passport';
 
 @Controller('email')

src/email/email.service.ts

@@ -13,7 +13,6 @@ import { EventosService } from 'src/eventos/eventos.service';
 import { Participante } from 'src/participante/participante.entity';
 import { Repository } from 'typeorm';
 import { EmailDto } from './dto/emailDto.dto';
-import * as xlsx from 'xlsx';
 import * as pdfMake from 'pdfmake/build/pdfmake';
 import * as pdfFonts from 'pdfmake/build/vfs_fonts';
 /* import * as PDFDocument from 'pdfkit'; */
@@ -127,9 +126,25 @@ export class EmailService {
     //traemos la info del evento
     const evento = await this.eventoService.getEventosPorId(id_evento);
 
-    const workbook = xlsx.read(file.buffer);
-    const worksheet = workbook.Sheets[workbook.SheetNames[0]];
-    const data = xlsx.utils.sheet_to_json(worksheet);
+    const workbook = new ExcelJS.Workbook();
+    await workbook.xlsx.load(file.buffer);
+    const worksheet = workbook.worksheets[0];
+
+    const data: any[] = [];
+    let headers: string[] = [];
+    worksheet.eachRow((row, rowNumber) => {
+      const rowData: any = {};
+      row.eachCell({ includeEmpty: true }, (cell, colNumber) => {
+        if (rowNumber === 1) {
+          headers[colNumber] = String(cell.value).trim();
+        } else {
+          rowData[headers[colNumber]] = cell.value;
+        }
+      });
+      if (rowNumber > 1) {
+        data.push(rowData);
+      }
+    });
 
     // Carga el PDF pre-diseñado
     const existingPdfBytes = fs.readFileSync('src/email/DisenoConstancia.pdf');