Add support for generating result PDFs

Introduced the `ResultFilePath` property in the `ZugferdInvoice` model to store the path of generated result PDFs. Added a new service, `PdfResultPackageService`, to create result PDFs by converting the original PDF to PDF/A-3b format and attaching a report file. Updated `Upload.cshtml` and `Upload.cshtml.cs` to handle and display the `ResultFilePath`. Created a migration to add the `ResultFilePath` column to the database. Updated `Program.cs` to register the new service and added configuration sections in `appsettings.json` for input and output directories. Enhanced error handling and logging for better traceability.
2026-05-27 13:43:14 +02:00
parent 6a46bf4f4b
commit 87f27682ce
9 changed files with 242 additions and 2 deletions
--- a/DXApp.TemplateKitProject/Services/PdfResultPackageService.cs
+++ b/DXApp.TemplateKitProject/Services/PdfResultPackageService.cs
@@ -0,0 +1,93 @@
+using DevExpress.Pdf;
+using DXApp.TemplateKitProject.Models;
+
+namespace DXApp.TemplateKitProject.Services;
+
+public class PdfResultPackageService(
+    IConfiguration configuration,
+    ILogger<PdfResultPackageService> logger)
+{
+    public async Task<string?> CreateResultPackageAsync(
+        byte[] originalPdfBytes,
+        string originalFileName,
+        ZugferdInvoice invoice)
+    {
+        // 1. Bericht-PDF suchen
+        var reportPath = FindReportFile(originalFileName);
+        if (reportPath is null)
+        {
+            logger.LogWarning(
+                "Kein Ergebnisbericht gefunden für '{FileName}'.", originalFileName);
+            return null;
+        }
+
+        logger.LogInformation(
+            "Ergebnisbericht gefunden: '{ReportPath}'.", reportPath);
+
+        // 2. Ausgabepfad bestimmen
+        var outputDir = configuration["PdfResults:OutputDirectory"]
+            ?? Path.Combine(Path.GetTempPath(), "PdfResults");
+        Directory.CreateDirectory(outputDir);
+
+        var baseName = Path.GetFileNameWithoutExtension(originalFileName);
+        var outputPath = Path.Combine(outputDir, $"{baseName}_result.pdf");
+
+        // 3. Original auf PDF/A-3b hochstufen + Bericht anhängen
+        await Task.Run(() =>
+        {
+            // Original in MemoryStream laden
+            using var inputStream = new MemoryStream(originalPdfBytes);
+            using var outputStream = new MemoryStream();
+
+            // PDF/A-3b Konvertierung
+            var converter = new PdfDocumentConverter(inputStream);
+            converter.Convert(PdfCompatibility.PdfA3b);
+
+            // Konvertiertes PDF in MemoryStream speichern
+            using var convertedStream = new MemoryStream();
+            converter.SaveDocument(convertedStream);
+            convertedStream.Position = 0;
+
+            // Bericht als Anhang einbetten
+            using var processor = new PdfDocumentProcessor();
+            processor.LoadDocument(convertedStream);
+
+            processor.AttachFile(new PdfFileAttachment
+            {
+                FileName = Path.GetFileName(reportPath),
+                Description = "Ergebnisbericht",
+                MimeType = "application/pdf",
+                Relationship = PdfAssociatedFileRelationship.Supplement,
+                CreationDate = DateTime.Now,
+                Data = File.ReadAllBytes(reportPath)
+            });
+
+            // Speichern
+            processor.SaveDocument(outputPath);
+        });
+
+        logger.LogInformation(
+            "Result-PDF gespeichert: '{OutputPath}'.", outputPath);
+
+        return outputPath;
+    }
+
+    private string? FindReportFile(string originalFileName)
+    {
+        var inputDir = configuration["PdfResultReports:InputDirectory"]
+            ?? Path.Combine(Path.GetTempPath(), "PdfResultReports");
+
+        if (!Directory.Exists(inputDir))
+        {
+            logger.LogWarning("Berichtsverzeichnis nicht gefunden: '{Dir}'.", inputDir);
+            return null;
+        }
+
+        // Konvention Option A: {originalname}_report.pdf
+        var baseName = Path.GetFileNameWithoutExtension(originalFileName);
+        var reportName = $"{baseName}_report.pdf";
+        var reportPath = Path.Combine(inputDir, reportName);
+
+        return File.Exists(reportPath) ? reportPath : null;
+    }
+}