Erweiterungen

pom.xml

@@ -123,6 +123,35 @@
             <version>3.0.3</version>
         </dependency>
 
+        <!-- iText8 for PDF generation -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>itext-core</artifactId>
+            <version>8.0.5</version>
+            <type>pom</type>
+        </dependency>
+
+        <!-- iText8 Kernel (PDF core functionality) -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>kernel</artifactId>
+            <version>8.0.5</version>
+        </dependency>
+
+        <!-- iText8 Layout (document layout) -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>layout</artifactId>
+            <version>8.0.5</version>
+        </dependency>
+
+        <!-- iText8 HTML to PDF converter -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>html2pdf</artifactId>
+            <version>5.0.5</version>
+        </dependency>
+
     </dependencies>
 
     <build>
@@ -280,4 +309,4 @@
             </snapshots>
         </pluginRepository>
     </pluginRepositories>
-</project>
+</project>

src/main/java/de/assecutor/votianlt/pages/view/PdfTestView.java

@@ -2,7 +2,9 @@ package de.assecutor.votianlt.pages.view;
 
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.html.H2;
+import com.vaadin.flow.component.html.IFrame;
 import com.vaadin.flow.component.notification.Notification;
+import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
 import com.vaadin.flow.component.orderedlayout.VerticalLayout;
 import com.vaadin.flow.router.PageTitle;
 import com.vaadin.flow.router.Route;
@@ -19,6 +21,7 @@ import java.io.ByteArrayInputStream;
 @RolesAllowed("ADMIN")
 public class PdfTestView extends VerticalLayout {
     private final SystemInvoiceService systemInvoiceService;
+    private IFrame pdfViewer;
     
     public PdfTestView(SystemInvoiceService systemInvoiceService) {
         this.systemInvoiceService = systemInvoiceService;
@@ -34,7 +37,29 @@ public class PdfTestView extends VerticalLayout {
         Button generatePdfButton = new Button("Test-Rechnung PDF generieren");
         generatePdfButton.addClickListener(e -> generateTestPdf());
 
-        add(generatePdfButton);
+        Button generateHtmlPdfButton = new Button("PDF aus vltInvoice.html generieren");
+        generateHtmlPdfButton.addClickListener(e -> generateHtmlPdf());
+
+        Button generateTestPdfFromHtmlButton = new Button("Test PDF aus vltInvoice.html erstellen");
+        generateTestPdfFromHtmlButton.addClickListener(e -> generateTestPdfFromHtml());
+
+        Button showPdfInlineButton = new Button("PDF inline anzeigen");
+        showPdfInlineButton.addClickListener(e -> showPdfInline());
+
+        // Create button layout
+        HorizontalLayout buttonLayout = new HorizontalLayout();
+        buttonLayout.add(generatePdfButton, generateHtmlPdfButton, generateTestPdfFromHtmlButton, showPdfInlineButton);
+        buttonLayout.setSpacing(true);
+
+        // Initialize PDF viewer
+        pdfViewer = new IFrame();
+        pdfViewer.setWidth("100%");
+        pdfViewer.setHeight("800px");
+        pdfViewer.getStyle().set("border", "1px solid #ccc");
+        pdfViewer.setVisible(false);
+
+        add(buttonLayout);
+        add(pdfViewer);
     }
 
     private void generateTestPdf() {
@@ -58,5 +83,67 @@ public class PdfTestView extends VerticalLayout {
         }
     }
 
+    private void generateHtmlPdf() {
+        try {
+            byte[] pdfBytes = systemInvoiceService.generateInvoicePdfFromHtml();
 
-}
+            StreamResource resource = new StreamResource("vlt-invoice.pdf",
+                    () -> new ByteArrayInputStream(pdfBytes));
+            resource.setContentType("application/pdf");
+
+            getUI().ifPresent(ui -> {
+                var registration = ui.getSession().getResourceRegistry().registerResource(resource);
+                ui.getPage().open(registration.getResourceUri().toString(), "_blank");
+            });
+
+            Notification.show("PDF aus HTML erfolgreich generiert!", 3000, Notification.Position.BOTTOM_CENTER);
+        } catch (Exception ex) {
+            Notification.show("Fehler beim Generieren des PDFs aus HTML: " + ex.getMessage(),
+                             5000, Notification.Position.BOTTOM_CENTER);
+        }
+    }
+
+    private void generateTestPdfFromHtml() {
+        try {
+            SystemInvoiceData sampleData = systemInvoiceService.createSampleInvoiceData();
+            byte[] pdfBytes = systemInvoiceService.generateInvoicePdfFromHtml();
+
+            StreamResource resource = new StreamResource("test-invoice-from-html.pdf",
+                    () -> new ByteArrayInputStream(pdfBytes));
+            resource.setContentType("application/pdf");
+
+            getUI().ifPresent(ui -> {
+                var registration = ui.getSession().getResourceRegistry().registerResource(resource);
+                ui.getPage().open(registration.getResourceUri().toString(), "_blank");
+            });
+
+            Notification.show("Test PDF aus HTML erfolgreich generiert!", 3000, Notification.Position.BOTTOM_CENTER);
+        } catch (Exception ex) {
+            Notification.show("Fehler beim Generieren des Test PDFs aus HTML: " + ex.getMessage(),
+                             5000, Notification.Position.BOTTOM_CENTER);
+        }
+    }
+
+    private void showPdfInline() {
+        try {
+            SystemInvoiceData sampleData = systemInvoiceService.createSampleInvoiceData();
+            byte[] pdfBytes = systemInvoiceService.generateInvoicePdf(sampleData);
+
+            StreamResource resource = new StreamResource("inline-invoice.pdf",
+                    () -> new ByteArrayInputStream(pdfBytes));
+            resource.setContentType("application/pdf");
+
+            getUI().ifPresent(ui -> {
+                var registration = ui.getSession().getResourceRegistry().registerResource(resource);
+                pdfViewer.setSrc(registration.getResourceUri().toString());
+                pdfViewer.setVisible(true);
+            });
+
+            Notification.show("PDF wird inline angezeigt!", 3000, Notification.Position.BOTTOM_CENTER);
+        } catch (Exception ex) {
+            Notification.show("Fehler beim Anzeigen des PDFs: " + ex.getMessage(),
+                             5000, Notification.Position.BOTTOM_CENTER);
+        }
+    }
+
+}

src/main/java/de/assecutor/votianlt/service/SystemInvoiceService.java

@@ -10,6 +10,8 @@ import org.apache.pdfbox.pdmodel.font.PDType1Font;
 import org.apache.pdfbox.pdmodel.font.Standard14Fonts;
 import org.springframework.stereotype.Service;
 
+import com.itextpdf.html2pdf.HtmlConverter;
+
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -72,7 +74,7 @@ public class SystemInvoiceService {
         contentStream.setFont(new PDType1Font(Standard14Fonts.FontName.HELVETICA_BOLD), TITLE_FONT_SIZE);
         contentStream.setNonStrokingColor(27/255f, 18/255f, 185/255f); // Blue color (RGB values normalized to 0-1)
         contentStream.newLineAtOffset(MARGIN, yPosition);
-        contentStream.showText(data.getCompanyName());
+        contentStream.showText(data.getCompanyName() != null ? data.getCompanyName() : "");
         contentStream.endText();
 
         yPosition -= 30;
@@ -82,7 +84,7 @@ public class SystemInvoiceService {
         contentStream.setFont(new PDType1Font(Standard14Fonts.FontName.HELVETICA_BOLD), FONT_SIZE);
         contentStream.setNonStrokingColor(27/255f, 18/255f, 185/255f);
         contentStream.newLineAtOffset(MARGIN, yPosition);
-        contentStream.showText(data.getCompanySubtitle());
+        contentStream.showText(data.getCompanySubtitle() != null ? data.getCompanySubtitle() : "");
         contentStream.endText();
 
         yPosition -= 20;
@@ -108,7 +110,7 @@ public class SystemInvoiceService {
         contentStream.beginText();
         contentStream.setFont(new PDType1Font(Standard14Fonts.FontName.HELVETICA), 8);
         contentStream.newLineAtOffset(leftColumn, yPosition);
-        contentStream.showText(data.getSenderLine());
+        contentStream.showText(data.getSenderLine() != null ? data.getSenderLine() : "");
         contentStream.endText();
 
         yPosition -= 20;
@@ -143,7 +145,7 @@ public class SystemInvoiceService {
 
         contentStream.beginText();
         contentStream.newLineAtOffset(dateColumn, recipientStartY - LINE_HEIGHT);
-        contentStream.showText(data.getInvoiceDate());
+        contentStream.showText(data.getInvoiceDate() != null ? data.getInvoiceDate() : "");
         contentStream.endText();
 
         // Company address (right side)
@@ -158,7 +160,7 @@ public class SystemInvoiceService {
         contentStream.beginText();
         contentStream.setFont(new PDType1Font(Standard14Fonts.FontName.HELVETICA_BOLD), SUBTITLE_FONT_SIZE);
         contentStream.newLineAtOffset(MARGIN, yPosition);
-        contentStream.showText("Rechnung " + data.getInvoiceNumber());
+        contentStream.showText("Rechnung " + (data.getInvoiceNumber() != null ? data.getInvoiceNumber() : ""));
         contentStream.endText();
 
         yPosition -= 30;
@@ -307,7 +309,7 @@ public class SystemInvoiceService {
         // VAT
         contentStream.beginText();
         contentStream.newLineAtOffset(rightColumn, yPosition);
-        contentStream.showText("+ " + data.getVatRate() + "% MwSt.:");
+        contentStream.showText("+ " + (data.getVatRate() != null ? data.getVatRate() : "") + "% MwSt.:");
         contentStream.endText();
 
         contentStream.beginText();
@@ -431,4 +433,67 @@ public class SystemInvoiceService {
 
         return data;
     }
-}
+
+    public byte[] generateInvoicePdfFromHtml() throws Exception {
+        // Read the HTML template
+        String htmlContent = readHtmlTemplate();
+        
+        // For simplicity, we'll use the existing sample data to fill the PDF
+        SystemInvoiceData sampleData = createSampleInvoiceData();
+        
+        // Replace placeholders in HTML with actual data
+        String filledHtml = fillHtmlWithInvoiceData(htmlContent, sampleData);
+        
+        // Create PDF from HTML using iText
+        return generatePdfFromHtmlString(filledHtml);
+    }
+    
+    private String readHtmlTemplate() throws Exception {
+        // Read the HTML template file
+        java.nio.file.Path path = java.nio.file.Paths.get("src/main/resources/templates/vltInvoice.html");
+        return java.nio.file.Files.readString(path);
+    }
+    
+    private String fillHtmlWithInvoiceData(String html, SystemInvoiceData data) {
+        // Replace placeholders in HTML with actual invoice data
+        String filledHtml = html;
+        
+        filledHtml = filledHtml.replace("HHA-2021-07", data.getInvoiceNumber() != null ? data.getInvoiceNumber() : "");
+        filledHtml = filledHtml.replace("19.07.2021", data.getInvoiceDate() != null ? data.getInvoiceDate() : "");
+        filledHtml = filledHtml.replace("Gemäß unserem Nutzungsvertrag zu der Bestellnummer 45519389 berechnen wir Ihnen für den Monat Juli 2021 wie folgt:", 
+            data.getInvoiceText() != null ? data.getInvoiceText() : "");
+        
+        // Replace recipient address
+        filledHtml = filledHtml.replace("Hamburger Hochbahn AG<br>\n      Kreditorenbuchhaltung<br>\n      Steinstraße 20<br>\n      20095 Hamburg", 
+            data.getRecipientName() != null ? data.getRecipientName() : "" + "<br>\n      " + 
+            (data.getRecipientDepartment() != null ? data.getRecipientDepartment() : "") + "<br>\n      " + 
+            (data.getRecipientStreet() != null ? data.getRecipientStreet() : "") + "<br>\n      " + 
+            (data.getRecipientCity() != null ? data.getRecipientCity() : ""));
+        
+        // Replace invoice items
+        if (data.getInvoiceItems() != null && !data.getInvoiceItems().isEmpty()) {
+            SystemInvoiceItem item = data.getInvoiceItems().get(0);
+            filledHtml = filledHtml.replace("1", item.getQuantity() != null ? item.getQuantity() : "");
+            filledHtml = filledHtml.replace("Mtl. Lizenzgebühr »ILLT«", item.getDescription() != null ? item.getDescription() : "");
+            filledHtml = filledHtml.replace("5.639,00 €", item.getUnitPrice() != null ? item.getUnitPrice() : "");
+            filledHtml = filledHtml.replace("5.639,00 €", item.getTotalPrice() != null ? item.getTotalPrice() : "");
+        }
+        
+        // Replace amounts
+        filledHtml = filledHtml.replace("5.639,00 €", data.getNetAmount() != null ? data.getNetAmount() : "");
+        filledHtml = filledHtml.replace("1.071,41 €", data.getVatAmount() != null ? data.getVatAmount() : "");
+        filledHtml = filledHtml.replace("6.710,41 €", data.getTotalAmount() != null ? data.getTotalAmount() : "");
+        
+        return filledHtml;
+    }
+    
+    private byte[] generatePdfFromHtmlString(String htmlContent) throws Exception {
+        // Create PDF using iText library
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        // Convert HTML to PDF using iText 8 HtmlConverter
+        HtmlConverter.convertToPdf(htmlContent, baos);
+        
+        return baos.toByteArray();
+    }
+    
+}

src/main/resources/templates/vltInvoice.html

@@ -0,0 +1,97 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <title>Rechnung VOTIAN-LT</title>
+  <style>
+    @page { size: A4; margin: 0; }
+    html, body { margin: 0; padding: 0; width: 21cm; height: 29.7cm; }
+    body {
+      display: flex;
+      flex-direction: column;
+      box-sizing: border-box;
+      padding: 2cm;
+      border: 2px solid #1b12b9;
+      font-family: Arial, sans-serif;
+      font-size: 12pt;
+      position: relative;
+    }
+    main { flex: 1 0 auto; }
+    h1, h2 { color: #1b12b9; text-align: center; margin: 0; }
+    table { width: 100%; border-collapse: collapse; margin-top: 1em; }
+    th, td { padding: 0.3em; text-align: right; border-top: 1px solid #ddd; vertical-align: top; }
+    th:first-child, td:first-child { text-align: left; }
+    .total-row { font-weight: bold; background: #e6e6e6; }
+
+    /* Footer exakt 5cm über dem unteren Rand */
+    .footer-section {
+      position: absolute;
+      bottom: 0cm; /* Abstand von unten */
+      left: 2cm;   /* gleiche Einrückung wie body-padding */
+      right: 2cm;
+    }
+
+    .footer { font-size: 10pt; text-align: center; margin-top: 1em; }
+  </style>
+</head>
+<body>
+
+  <main>
+    <h1>Assecutor</h1>
+    <h2>Data Service GmbH1111</h2>
+
+    <p><strong>Empfänger:</strong><br>
+      Hamburger Hochbahasdfasdasn AG<br>
+      Kreditorenbuchhaltung<br>
+      Steinstraße 20<br>
+      20095 Hamburg
+    </p>
+
+    <p><strong>Absender:</strong><br>
+      Assecutor Data Service GmbH<br>
+      Gerhart-Hauptmann-Weg 14, 21502 Geesthacht<br>
+      Tel.: 040-181237710 · www.assecutor.de
+    </p>
+
+    <p><strong>Datum:</strong> 19.07.2021</p>
+
+    <h2>Rechnung HHA-2021-07</h2>
+    <p>Gemäß unserem Nutzungsvertrag zu der Bestellnummer <strong>45519389</strong>
+       berechnen wir Ihnen für den Monat Juli 2021 wie folgt:</p>
+
+    <table>
+      <tr>
+        <th>Menge</th><th>Bezeichnung</th><th>Einzelpreis</th><th>Gesamt</th>
+      </tr>
+      <tr>
+        <td>1</td>
+        <td style="text-align:left">
+          Mtl. Lizenzgebühr »ILLT«
+        </td>
+        <td>5.639,00 €</td>
+        <td>5.639,00 €</td>
+      </tr>
+      <tr class="total-row">
+        <td></td><td style="text-align:left">Nettobetrag</td><td></td><td>5.639,00 €</td>
+      </tr>
+      <tr>
+        <td></td><td style="text-align:left">+ 19% MwSt.</td><td></td><td>1.071,41 €</td>
+      </tr>
+      <tr class="total-row">
+        <td></td><td style="text-align:left">Endbetrag</td><td></td><td>6.710,41 €</td>
+      </tr>
+    </table>
+  </main>
+
+  <div class="footer-section">
+    <p><strong>Zahlungsbedingungen:</strong> Gesamtbetrag bis spätestens zum 10. Werktag nach Rechnungserhalt auf unser Konto.</p>
+	<br>
+    <p class="footer">
+      Geschäftsführer: Carsten Annacker, Gunnar Timm · Steuernummer: 22 294 53099 · USt-IdNr.: DE261094748<br>
+      Sitz: Geesthacht · Handelsregister: Lübeck HRB 8595<br>
+      Bankverbindung: Hamburger Sparkasse · IBAN DE67200505501217139888 · BIC HASPDEHHXXX
+    </p>
+  </div>
+
+</body>
+</html>