feat(web): add CfdiViewerModal with PDF and XML download

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/components/cfdi/cfdi-viewer-modal.tsx

@@ -0,0 +1,169 @@
+'use client';
+
+import { useRef, useState, useEffect } from 'react';
+import type { Cfdi } from '@horux/shared';
+import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog';
+import { Button } from '@/components/ui/button';
+import { CfdiInvoice } from './cfdi-invoice';
+import { getCfdiXml } from '@/lib/api/cfdi';
+import { Download, FileText, Loader2 } from 'lucide-react';
+
+interface CfdiConcepto {
+  descripcion: string;
+  cantidad: number;
+  valorUnitario: number;
+  importe: number;
+}
+
+interface CfdiViewerModalProps {
+  cfdi: Cfdi | null;
+  open: boolean;
+  onClose: () => void;
+}
+
+function parseConceptosFromXml(xmlString: string): CfdiConcepto[] {
+  try {
+    const parser = new DOMParser();
+    const doc = parser.parseFromString(xmlString, 'text/xml');
+    const conceptos: CfdiConcepto[] = [];
+
+    // Find all Concepto elements
+    const elements = doc.getElementsByTagName('*');
+    for (let i = 0; i < elements.length; i++) {
+      if (elements[i].localName === 'Concepto') {
+        const el = elements[i];
+        conceptos.push({
+          descripcion: el.getAttribute('Descripcion') || '',
+          cantidad: parseFloat(el.getAttribute('Cantidad') || '1'),
+          valorUnitario: parseFloat(el.getAttribute('ValorUnitario') || '0'),
+          importe: parseFloat(el.getAttribute('Importe') || '0'),
+        });
+      }
+    }
+
+    return conceptos;
+  } catch {
+    return [];
+  }
+}
+
+export function CfdiViewerModal({ cfdi, open, onClose }: CfdiViewerModalProps) {
+  const invoiceRef = useRef<HTMLDivElement>(null);
+  const [conceptos, setConceptos] = useState<CfdiConcepto[]>([]);
+  const [downloading, setDownloading] = useState<'pdf' | 'xml' | null>(null);
+  const [xmlContent, setXmlContent] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (cfdi?.xmlOriginal) {
+      setXmlContent(cfdi.xmlOriginal);
+      setConceptos(parseConceptosFromXml(cfdi.xmlOriginal));
+    } else {
+      setXmlContent(null);
+      setConceptos([]);
+    }
+  }, [cfdi]);
+
+  const handleDownloadPdf = async () => {
+    if (!invoiceRef.current || !cfdi) return;
+
+    setDownloading('pdf');
+    try {
+      const html2pdf = (await import('html2pdf.js')).default;
+
+      const opt = {
+        margin: 10,
+        filename: `factura-${cfdi.uuidFiscal.substring(0, 8)}.pdf`,
+        image: { type: 'jpeg', quality: 0.98 },
+        html2canvas: { scale: 2, useCORS: true },
+        jsPDF: { unit: 'mm', format: 'a4', orientation: 'portrait' },
+      };
+
+      await html2pdf().set(opt).from(invoiceRef.current).save();
+    } catch (error) {
+      console.error('Error generating PDF:', error);
+      alert('Error al generar el PDF');
+    } finally {
+      setDownloading(null);
+    }
+  };
+
+  const handleDownloadXml = async () => {
+    if (!cfdi) return;
+
+    setDownloading('xml');
+    try {
+      let xml = xmlContent;
+
+      if (!xml) {
+        xml = await getCfdiXml(cfdi.id);
+      }
+
+      if (!xml) {
+        alert('No hay XML disponible para este CFDI');
+        return;
+      }
+
+      const blob = new Blob([xml], { type: 'application/xml' });
+      const url = URL.createObjectURL(blob);
+      const a = document.createElement('a');
+      a.href = url;
+      a.download = `cfdi-${cfdi.uuidFiscal.substring(0, 8)}.xml`;
+      document.body.appendChild(a);
+      a.click();
+      document.body.removeChild(a);
+      URL.revokeObjectURL(url);
+    } catch (error) {
+      console.error('Error downloading XML:', error);
+      alert('Error al descargar el XML');
+    } finally {
+      setDownloading(null);
+    }
+  };
+
+  if (!cfdi) return null;
+
+  return (
+    <Dialog open={open} onOpenChange={(isOpen) => !isOpen && onClose()}>
+      <DialogContent className="max-w-4xl max-h-[90vh] overflow-y-auto">
+        <DialogHeader>
+          <div className="flex items-center justify-between">
+            <DialogTitle>Vista de Factura</DialogTitle>
+            <div className="flex gap-2">
+              <Button
+                variant="outline"
+                size="sm"
+                onClick={handleDownloadPdf}
+                disabled={downloading !== null}
+              >
+                {downloading === 'pdf' ? (
+                  <Loader2 className="h-4 w-4 mr-1 animate-spin" />
+                ) : (
+                  <Download className="h-4 w-4 mr-1" />
+                )}
+                PDF
+              </Button>
+              <Button
+                variant="outline"
+                size="sm"
+                onClick={handleDownloadXml}
+                disabled={downloading !== null || !xmlContent}
+                title={!xmlContent ? 'XML no disponible' : 'Descargar XML'}
+              >
+                {downloading === 'xml' ? (
+                  <Loader2 className="h-4 w-4 mr-1 animate-spin" />
+                ) : (
+                  <FileText className="h-4 w-4 mr-1" />
+                )}
+                XML
+              </Button>
+            </div>
+          </div>
+        </DialogHeader>
+
+        <div className="border rounded-lg overflow-hidden bg-gray-50 p-4">
+          <CfdiInvoice ref={invoiceRef} cfdi={cfdi} conceptos={conceptos} />
+        </div>
+      </DialogContent>
+    </Dialog>
+  );
+}