import os import traceback from django.http import HttpResponse from django.shortcuts import redirect, render from .models import Certificate from .utils import generate_certificate_pdf, generate_and_sign_certificate def verify_search_view(request): """ Portal de Verificación Pública de Diplomas (/validar-certificado/). """ code = request.GET.get("code") if code: clean_code = code.strip().upper() return redirect("certificates:verify_detail", certificate_code=clean_code) return render(request, "pages/verify_search.html") def verify_detail_view(request, certificate_code): """ Resultado público de la verificación del diploma. """ certificate = Certificate.objects.select_related("enrollment__user", "enrollment__course").filter( certificate_code__iexact=certificate_code.strip() ).first() context = { "certificate": certificate, "searched_code": certificate_code.strip().upper(), } return render(request, "pages/verify_detail.html", context) def certificate_download_view(request, certificate_code): """ Descarga del diploma oficial firmado digitalmente en PDF de alta resolución. """ try: certificate = Certificate.objects.filter(certificate_code=certificate_code).first() if not certificate: html_not_found = f""" Constancia No Encontrada | Lo Justo LMS

🎓 Constancia No Encontrada

No se localizó en la base de datos de producción ninguna constancia registrada con el código oficial {certificate_code}.

Volver al Inicio
""" return HttpResponse(html_not_found, status=200) if certificate.pdf_file and os.path.exists(certificate.pdf_file.path): with open(certificate.pdf_file.path, "rb") as f: pdf_bytes = f.read() else: pdf_buffer = generate_and_sign_certificate(certificate) pdf_bytes = pdf_buffer.getvalue() filename = f"Diploma_LoJusto_{certificate.certificate_code}.pdf" response = HttpResponse(pdf_bytes, content_type="application/pdf") response["Content-Disposition"] = f'attachment; filename="{filename}"' response["Content-Length"] = str(len(pdf_bytes)) return response except Exception as e: tb = traceback.format_exc() html = f""" Diagnóstico Técnico | Lo Justo LMS

⚠️ Diagnóstico Técnico de Descarga en Servidor

El servidor cPanel interceptó una excepción al procesar la constancia {certificate_code}.

Excepción principal: {str(e)}

{tb}
""" return HttpResponse(html, status=200)