Refactor CSVImportDialog to CSVImportPanel and enhance UI components

- Renamed CSVImportDialog component to CSVImportPanel for clarity.
- Replaced Dialog with Paper component for improved layout.
- Removed unused code and comments to streamline the component.
- Updated import result messages for better user feedback.
- Enhanced button styles and layout for a more user-friendly interface.
- Added new API route for importing DATEV Beleglinks to the database, including validation and error handling.

client/src/components/CSVImportDialog.js

@@ -1,9 +1,5 @@
 import React, { Component } from 'react';
 import {
-  Dialog,
-  DialogTitle,
-  DialogContent,
-  DialogActions,
   Button,
   Typography,
   Box,
@@ -14,6 +10,7 @@ import {
   Tabs,
   Tab,
   Divider,
+  Paper,
 } from '@mui/material';
 import {
   CloudUpload as UploadIcon,
@@ -30,7 +27,7 @@ const IMPORT_TYPES = {
   DATEV_LINKS: 'DATEV_LINKS',
 };
 
-class CSVImportDialog extends Component {
+class CSVImportPanel extends Component {
   constructor(props) {
     super(props);
     this.state = {
@@ -276,10 +273,6 @@ class CSVImportDialog extends Component {
       datevCsvData: null,
       datevHeaders: null,
     });
-    
-    if (this.props.onClose) {
-      this.props.onClose();
-    }
   };
 
   renderUploadPanel = ({ isBanking }) => {
@@ -341,86 +334,6 @@ class CSVImportDialog extends Component {
           </Typography>
         </Box>
 
-        {!isBanking && (
-          <Box sx={{ mb: 2 }}>
-            <Divider sx={{ mb: 2 }} />
-            <Box sx={{ display: 'flex', alignItems: 'flex-start', gap: 1, mb: 1 }}>
-              <InfoIcon sx={{ color: 'info.main', mt: '2px' }} />
-              <Typography variant="subtitle1">Hinweise zum DATEV Beleglink-Upload</Typography>
-            </Box>
-            <Typography variant="body2" paragraph sx={{ color: 'text.secondary' }}>
-              Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere, neque at efficitur
-              blandit, sapien libero finibus nunc, a facilisis lacus arcu sed urna. Suspendisse potenti.
-              Phasellus tincidunt, lorem in dictum lacinia, sem tortor ultrices risus, vitae porta odio
-              mauris non neque. Sed vitae nibh dapibus, viverra velit nec, aliquet odio.
-            </Typography>
-            <Typography variant="body2" paragraph sx={{ color: 'text.secondary' }}>
-              Cras lacinia, massa a sagittis placerat, enim dolor fermentum lectus, in pulvinar mi risus ut
-              ipsum. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis
-              egestas. Mauris mattis lorem sit amet risus mattis volutpat. Proin sit amet hendrerit lectus.
-            </Typography>
-            <Box
-              sx={{
-                width: '100%',
-                borderRadius: 1,
-                border: '1px solid',
-                borderColor: 'divider',
-                display: 'block',
-                mb: 1.5,
-                overflow: 'hidden',
-                bgcolor: 'background.paper',
-              }}
-            >
-              <Box
-                component="svg"
-                viewBox="0 0 640 300"
-                xmlns="http://www.w3.org/2000/svg"
-                sx={{ width: '100%', height: 'auto', display: 'block' }}
-              >
-                <defs>
-                  <linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="0%">
-                    <stop offset="0%" style={{ stopColor: '#e3f2fd', stopOpacity: 1 }} />
-                    <stop offset="100%" style={{ stopColor: '#e8f5e9', stopOpacity: 1 }} />
-                  </linearGradient>
-                </defs>
-                <rect x="0" y="0" width="640" height="300" fill="url(#grad)" />
-                <rect x="20" y="20" width="600" height="60" rx="8" fill="#ffffff" stroke="#cfd8dc" />
-                <circle cx="50" cy="50" r="12" fill="#81c784" />
-                <rect x="75" y="38" width="200" height="12" rx="6" fill="#90caf9" />
-                <rect x="75" y="56" width="140" height="10" rx="5" fill="#b0bec5" />
-
-                <rect x="20" y="100" width="600" height="160" rx="8" fill="#ffffff" stroke="#cfd8dc" />
-                <rect x="40" y="120" width="160" height="20" rx="4" fill="#ffe082" />
-                <rect x="40" y="150" width="260" height="12" rx="6" fill="#b0bec5" />
-                <rect x="40" y="170" width="220" height="10" rx="5" fill="#eceff1" />
-                <rect x="40" y="190" width="300" height="10" rx="5" fill="#eceff1" />
-
-                <rect x="330" y="120" width="270" height="120" rx="8" fill="#f1f8e9" stroke="#c5e1a5" />
-                <rect x="350" y="140" width="230" height="12" rx="6" fill="#c5e1a5" />
-                <rect x="350" y="160" width="180" height="10" rx="5" fill="#dcedc8" />
-                <g>
-                  <line x1="350" y1="190" x2="580" y2="190" stroke="#aed581" strokeWidth="2" />
-                  <line x1="350" y1="200" x2="560" y2="200" stroke="#aed581" strokeWidth="2" />
-                  <line x1="350" y1="210" x2="520" y2="210" stroke="#aed581" strokeWidth="2" />
-                </g>
-
-                <g fill="#90a4ae">
-                  <rect x="540" y="28" width="20" height="6" rx="3" />
-                  <rect x="565" y="28" width="20" height="6" rx="3" />
-                  <rect x="590" y="28" width="20" height="6" rx="3" />
-                </g>
-
-                <text x="320" y="285" textAnchor="middle" fontFamily="Arial, Helvetica, sans-serif" fontSize="12" fill="#90a4ae">
-                  DATEV Beleglinks Beispiel – Platzhalter Illustration
-                </text>
-              </Box>
-            </Box>
-            <Typography variant="caption" sx={{ color: 'text.disabled' }}>
-              Beispiel-Screenshot (SVG Platzhalter mit Shapes). Ersetzen Sie dieses Bild später durch die endgültige Anleitungsgrafik.
-            </Typography>
-          </Box>
-        )}
-
         {currentFile && (
           <Box sx={{ mb: 2 }}>
             <Typography variant="subtitle2" gutterBottom>
@@ -461,7 +374,6 @@ class CSVImportDialog extends Component {
   };
 
   render() {
-    const { open } = this.props;
     const {
       activeTab,
       importing,
@@ -476,25 +388,22 @@ class CSVImportDialog extends Component {
     const hasData = isBanking ? csvData : datevCsvData;
 
     return (
-      <Dialog
-        open={open}
-        onClose={!importing ? this.handleClose : undefined}
-        maxWidth="md"
-        fullWidth
-      >
-        <DialogTitle>CSV Import</DialogTitle>
+      <Paper sx={{ p: 3 }}>
+        <Typography variant="h5" gutterBottom>
+          CSV Import
+        </Typography>
 
         <Tabs
           value={activeTab}
           onChange={this.handleTabChange}
           variant="fullWidth"
-          sx={{ borderBottom: 1, borderColor: 'divider' }}
+          sx={{ borderBottom: 1, borderColor: 'divider', mb: 3 }}
         >
           <Tab value={IMPORT_TYPES.BANKING} iconPosition="start" icon={<AccountIcon />} label="Banking Umsätze" />
           <Tab value={IMPORT_TYPES.DATEV_LINKS} iconPosition="start" icon={<LinkIcon />} label="DATEV Beleglinks" />
         </Tabs>
         
-        <DialogContent>
+        <Box>
           {!imported ? (
             <>
               {this.renderUploadPanel({ isBanking })}
@@ -524,11 +433,21 @@ class CSVImportDialog extends Component {
               {importResult && (
                 <Box sx={{ mt: 2 }}>
                   <Typography variant="body1" gutterBottom>
-                    <strong>Importiert:</strong> {importResult.imported} {isBanking ? 'Transaktionen' : 'Beleglinks'}
+                    <strong>Hinzugefügt:</strong> {importResult.imported} {isBanking ? 'Transaktionen' : 'Datevlinks'}
                   </Typography>
+                  {importResult.skipped > 0 && (
+                    <Typography variant="body1" color="info.main">
+                      <strong>Übersprungen:</strong> {importResult.skipped} Zeilen (bereits vorhanden, unbekanntes Format, etc.)
+                    </Typography>
+                  )}
                   {importResult.errors > 0 && (
                     <Typography variant="body1" color="warning.main">
-                      <strong>Fehler:</strong> {importResult.errors} Zeilen übersprungen
+                      <strong>Fehler:</strong> {importResult.errors} Zeilen konnten nicht verarbeitet werden
+                    </Typography>
+                  )}
+                  {importResult.message && (
+                    <Typography variant="body2" color="textSecondary" sx={{ mt: 1 }}>
+                      {importResult.message}
                     </Typography>
                   )}
                   <Typography variant="body2" color="textSecondary" sx={{ mt: 1 }}>
@@ -538,26 +457,31 @@ class CSVImportDialog extends Component {
               )}
             </Box>
           )}
-        </DialogContent>
-
-        <DialogActions>
-          <Button onClick={this.handleClose} disabled={importing}>
-            {imported ? 'Schließen' : 'Abbrechen'}
-          </Button>
           {!imported && hasData && (
-            <Button
-              onClick={this.handleImport}
-              variant="contained"
-              disabled={importing || !hasData}
-              startIcon={importing ? <CircularProgress size={16} /> : <UploadIcon />}
-            >
-              {importing ? 'Importiere...' : 'Importieren'}
-            </Button>
+            <Box sx={{ mt: 3, textAlign: 'center' }}>
+              <Button
+                onClick={this.handleImport}
+                variant="contained"
+                size="large"
+                disabled={importing || !hasData}
+                startIcon={importing ? <CircularProgress size={16} /> : <UploadIcon />}
+              >
+                {importing ? 'Importiere...' : 'Importieren'}
+              </Button>
+            </Box>
           )}
-        </DialogActions>
-      </Dialog>
+
+          {imported && (
+            <Box sx={{ mt: 3, textAlign: 'center' }}>
+              <Button onClick={this.handleClose} variant="outlined" size="large">
+                Neuer Import
+              </Button>
+            </Box>
+          )}
+        </Box>
+      </Paper>
     );
   }
 }
 
-export default CSVImportDialog;
+export default CSVImportPanel;

client/src/components/TableManagement.js

@@ -15,7 +15,7 @@ import {
 import KreditorTable from './admin/KreditorTable';
 import KontoTable from './admin/KontoTable';
 import BUTable from './admin/BUTable';
-import CSVImportDialog from './CSVImportDialog';
+import CSVImportPanel from './CSVImportDialog';
 
 class TableManagement extends Component {
   constructor(props) {
@@ -90,9 +90,7 @@ class TableManagement extends Component {
                 <Typography variant="body2" color="text.secondary" paragraph>
                   Hier können Sie CSV-Dateien von Ihrer Bank importieren. Die Daten werden in die Datenbank gespeichert und können dann Banking-Konten zugeordnet werden.
                 </Typography>
-                <CSVImportDialog 
-                  open={true}
-                  onClose={() => {}} // Always open in this tab
+                <CSVImportPanel 
                   user={user}
                 />
               </Box>

src/routes/data/csvImport.js

@@ -370,4 +370,203 @@ router.get('/csv-import-batches', authenticateToken, async (req, res) => {
   }
 });
 
+// Import DATEV Beleglinks to database
+router.post('/import-datev-beleglinks', authenticateToken, async (req, res) => {
+  try {
+    const { executeQuery } = require('../../config/database');
+    const { beleglinks, filename, batchId, headers } = req.body;
+    
+    if (!beleglinks || !Array.isArray(beleglinks)) {
+      return res.status(400).json({ error: 'Beleglinks array is required' });
+    }
+    
+    // Expected DATEV CSV headers from the example
+    const expectedHeaders = [
+      'Belegart', 'Geschäftspartner-Name', 'Geschäftspartner-Konto', 'Rechnungsbetrag', 'WKZ',
+      'Rechnungs-Nr.', 'Interne Re.-Nr.', 'Rechnungsdatum', 'BU', 'Konto', 'Konto-Bezeichnung',
+      'Ware/Leistung', 'Zahlungszuordnung', 'Kontoumsatzzuordnung', 'Gebucht', 'Festgeschrieben',
+      'Kopie', 'Eingangsdatum', 'Bezahlt', 'BezahltAm', 'Geschäftspartner-Ort', 'Skonto-Betrag 1',
+      'Fällig mit Skonto 1', 'Skonto 1 in %', 'Skonto-Betrag 2', 'Fällig mit Skonto 2',
+      'Skonto 2 in %', 'Fällig ohne Skonto', 'Steuer in %', 'USt-IdNr.', 'Kunden-Nr.',
+      'KOST 1', 'KOST 2', 'KOST-Menge', 'Kurs', 'Nachricht', 'Freier Text', 'IBAN', 'BIC',
+      'Bankkonto-Nr.', 'BLZ', 'Notiz', 'Land', 'Personalnummer', 'Nachname', 'Vorname',
+      'Belegkategorie', 'Bezeichnung', 'Abrechnungsmonat', 'Gültig bis', 'Prüfungsrelevant',
+      'Ablageort', 'Belegtyp', 'Herkunft', 'Leistungsdatum', 'Buchungstext', 'Beleg-ID',
+      'Zahlungsbedingung', 'Geheftet', 'Gegenkonto', 'keine Überweisung/Lastschrift erstellen',
+      'Aufgeteilt', 'Bereitgestellt', 'Freigegeben', 'FreigegebenAm', 'Erweiterte Belegdaten fehlen',
+      'Periode fehlt', 'Rechnungsdaten beim Import fehlen'
+    ];
+    
+    if (beleglinks.length === 0) {
+      return res.status(400).json({ error: 'No beleglink data found' });
+    }
+    
+    const importBatchId = batchId || 'datev_import_' + Date.now();
+    let successCount = 0;
+    let errorCount = 0;
+    let updateCount = 0;
+    let insertCount = 0;
+    let skippedCount = 0;
+    const errors = [];
+    
+    for (let i = 0; i < beleglinks.length; i++) {
+      const beleglink = beleglinks[i];
+      
+      try {
+        // Skip empty rows or rows without Beleg-ID
+        const belegId = beleglink['Beleg-ID'];
+        if (!belegId || belegId.trim() === '') {
+          console.log(`Skipping row ${i + 1}: No Beleg-ID found`);
+          skippedCount++;
+          continue;
+        }
+        
+        const validationErrors = [];
+        
+        // Parse amount if available
+        let numericAmount = null;
+        if (beleglink['Rechnungsbetrag']) {
+          const amountStr = beleglink['Rechnungsbetrag'].toString().replace(/[^\d,.-]/g, '');
+          const normalizedAmount = amountStr.replace(',', '.');
+          numericAmount = parseFloat(normalizedAmount) || null;
+        }
+        
+        // Parse date if available
+        let parsedDate = null;
+        if (beleglink['Rechnungsdatum']) {
+          const dateStr = beleglink['Rechnungsdatum'].trim();
+          const dateParts = dateStr.split(/[.\/\-]/);
+          if (dateParts.length === 3) {
+            const day = parseInt(dateParts[0], 10);
+            const month = parseInt(dateParts[1], 10) - 1;
+            let year = parseInt(dateParts[2], 10);
+            
+            if (year < 100) {
+              year += (year < 50) ? 2000 : 1900;
+            }
+            
+            parsedDate = new Date(year, month, day);
+            
+            if (isNaN(parsedDate.getTime())) {
+              parsedDate = null;
+            }
+          }
+        }
+        
+        // First, check if a record with this datevlink already exists
+        const checkExistingDatevLink = `
+          SELECT kUmsatzBeleg FROM eazybusiness.dbo.tUmsatzBeleg WHERE datevlink = @datevlink
+        `;
+        
+        const existingDatevLink = await executeQuery(checkExistingDatevLink, { datevlink: belegId });
+        
+        if (existingDatevLink.recordset.length > 0) {
+          // Record with this datevlink already exists - skip
+          console.log(`Datevlink already exists, skipping: ${belegId}`);
+          skippedCount++;
+          continue;
+        }
+        
+        // Extract key from filename in 'Herkunft' column
+        // Examples: "Rechnung146.pdf" -> key 146 for tRechnung
+        //           "UmsatzBeleg192.pdf" -> key 192 for tUmsatzBeleg
+        const herkunft = beleglink['Herkunft'];
+        if (!herkunft || herkunft.trim() === '') {
+          console.log(`Skipping row ${i + 1}: No filename in Herkunft column`);
+          skippedCount++;
+          continue;
+        }
+        
+        // Extract the key from filename patterns
+        let matchFound = false;
+        
+        // Pattern: UmsatzBeleg{key}.pdf -> match with tUmsatzBeleg.kUmsatzBeleg
+        const umsatzBelegMatch = herkunft.match(/UmsatzBeleg(\d+)\.pdf/i);
+        if (umsatzBelegMatch) {
+          const kUmsatzBeleg = parseInt(umsatzBelegMatch[1], 10);
+          
+          const updateQuery = `
+            UPDATE eazybusiness.dbo.tUmsatzBeleg 
+            SET datevlink = @datevlink
+            WHERE kUmsatzBeleg = @kUmsatzBeleg AND (datevlink IS NULL OR datevlink = '')
+          `;
+          
+          const updateResult = await executeQuery(updateQuery, {
+            datevlink: belegId,
+            kUmsatzBeleg: kUmsatzBeleg
+          });
+          
+          if (updateResult.rowsAffected && updateResult.rowsAffected[0] > 0) {
+            updateCount++;
+            console.log(`Added datevlink ${belegId} to tUmsatzBeleg.kUmsatzBeleg: ${kUmsatzBeleg}`);
+            matchFound = true;
+          } else {
+            console.log(`Skipping row ${i + 1}: UmsatzBeleg ${kUmsatzBeleg} nicht gefunden oder datevlink bereits gesetzt`);
+            skippedCount++;
+          }
+        }
+        
+        // Pattern: Rechnung{key}.pdf -> match with tPdfObjekt.kPdfObjekt
+        const rechnungMatch = herkunft.match(/Rechnung(\d+)\.pdf/i);
+        if (!matchFound && rechnungMatch) {
+          const kPdfObjekt = parseInt(rechnungMatch[1], 10);
+          
+          const updateQuery = `
+            UPDATE eazybusiness.dbo.tPdfObjekt 
+            SET datevlink = @datevlink
+            WHERE kPdfObjekt = @kPdfObjekt AND (datevlink IS NULL OR datevlink = '')
+          `;
+          
+          const updateResult = await executeQuery(updateQuery, {
+            datevlink: belegId,
+            kPdfObjekt: kPdfObjekt
+          });
+          
+          if (updateResult.rowsAffected && updateResult.rowsAffected[0] > 0) {
+            updateCount++;
+            console.log(`Added datevlink ${belegId} to tPdfObjekt.kPdfObjekt: ${kPdfObjekt}`);
+            matchFound = true;
+          } else {
+            console.log(`Skipping row ${i + 1}: PdfObjekt ${kPdfObjekt} nicht gefunden oder datevlink bereits gesetzt`);
+            skippedCount++;
+          }
+        }
+        
+        if (!matchFound) {
+          console.log(`Skipping row ${i + 1}: Unbekanntes Dateiformat '${herkunft}' (erwartet: UmsatzBeleg{key}.pdf oder Rechnung{key}.pdf)`);
+          skippedCount++;
+          continue;
+        }
+        
+        successCount++;
+      } catch (error) {
+        console.error('Error processing beleglink ' + (i + 1) + ':', error);
+        errors.push({
+          row: i + 1,
+          error: error.message,
+          beleglink: beleglink
+        });
+        errorCount++;
+      }
+    }
+    
+    res.json({
+      success: true,
+      batchId: importBatchId,
+      imported: updateCount, // Number of datevlinks actually added/updated
+      processed: successCount,
+      updated: updateCount,
+      inserted: insertCount,
+      skipped: skippedCount, // Records skipped (existing datevlinks)
+      errors: errorCount, // Only actual errors, not skipped records
+      details: errors.length > 0 ? errors : undefined,
+      message: `${updateCount} datevlinks hinzugefügt, ${skippedCount} bereits vorhanden, ${errorCount} Fehler`
+    });
+    
+  } catch (error) {
+    console.error('Error importing DATEV beleglinks:', error);
+    res.status(500).json({ error: 'Failed to import DATEV beleglinks' });
+  }
+});
+
 module.exports = router;