From b31603554a09dfd28799b81f49b607784cafce68 Mon Sep 17 00:00:00 2001
From: Lorenz Stechauner <lorenz.stechauner@necronda.net>
Date: Thu, 15 Jan 2026 13:23:08 +0100
Subject: [PATCH] Document: Add IsPreview to indicate that a document may only
 be viewed by internal staff

---
 Elwig/Documents/CreditNote.cs            |  1 +
 Elwig/Documents/Document.cs              | 11 ++++++-----
 Elwig/Documents/Document.cshtml          |  8 ++++----
 Elwig/Documents/PaymentVariantSummary.cs |  1 +
 Elwig/Helpers/Utils.cs                   | 14 ++++++++++++++
 Elwig/Windows/MailWindow.xaml.cs         | 22 +++++++++++++++++-----
 6 files changed, 43 insertions(+), 14 deletions(-)

diff --git a/Elwig/Documents/CreditNote.cs b/Elwig/Documents/CreditNote.cs
index 5c4e357..7893fcf 100644
--- a/Elwig/Documents/CreditNote.cs
+++ b/Elwig/Documents/CreditNote.cs
@@ -39,6 +39,7 @@ namespace Elwig.Documents {
             Data = data;
             Payment = p;
             Credit = p.Credit;
+            IsPreview = Payment == null || Credit == null;
             var season = p.Variant.Season;
             if (considerCustomModifiers) {
                 CustomPayment = ctx.CustomPayments.Find(p.Year, p.MgNr);
diff --git a/Elwig/Documents/Document.cs b/Elwig/Documents/Document.cs
index 26a0e29..37e23a1 100644
--- a/Elwig/Documents/Document.cs
+++ b/Elwig/Documents/Document.cs
@@ -18,10 +18,11 @@ namespace Elwig.Documents {
         protected string? _pdfPath;
         protected string? PdfPath => _pdfPath ?? _pdfFile?.FilePath;
         public int? TotalPages { get; private set; }
-        public int? Pages => TotalPages / (DoublePaged ? 2 : 1);
+        public int? Pages => TotalPages / (IsDoublePaged ? 2 : 1);
 
         public bool ShowFoldMarks = App.Config.Debug;
-        public bool DoublePaged = false;
+        public bool IsDoublePaged = false;
+        public bool IsPreview = false;
 
         public string DocumentsPath;
         public int CurrentNextSeason;
@@ -129,7 +130,7 @@ namespace Elwig.Documents {
                     progress?.Report(GenerationProportion * 100 * i / n);
                 }
                 progress?.Report(GenerationProportion * 100);
-                var pages = await Pdf.Convert(tmpFiles, pdf.FileName, DoublePaged, new Progress<double>(v => progress?.Report(GenerationProportion * 100 + v * (1 - GenerationProportion))));
+                var pages = await Pdf.Convert(tmpFiles, pdf.FileName, IsDoublePaged, new Progress<double>(v => progress?.Report(GenerationProportion * 100 + v * (1 - GenerationProportion))));
                 TotalPages = pages.Pages;
                 foreach (var tmp in tmpHtmls) {
                     tmp.Dispose();
@@ -140,7 +141,7 @@ namespace Elwig.Documents {
                 using (var tmpHtml = new TempFile("html")) {
                     await File.WriteAllTextAsync(tmpHtml.FilePath, await Render(), Utils.UTF8);
                     progress?.Report(50.0);
-                    var pages = await Pdf.Convert(tmpHtml.FilePath, pdf.FilePath, DoublePaged);
+                    var pages = await Pdf.Convert(tmpHtml.FilePath, pdf.FilePath, IsDoublePaged);
                     TotalPages = pages.Pages;
                 }
                 _pdfFile = pdf;
@@ -155,7 +156,7 @@ namespace Elwig.Documents {
 
         public async Task Print(int copies = 1) {
             if (PdfPath == null) throw new InvalidOperationException("Pdf file has not been generated yet");
-            await Pdf.Print(PdfPath, copies, DoublePaged);
+            await Pdf.Print(PdfPath, copies, IsDoublePaged);
         }
 
         public void Show() {
diff --git a/Elwig/Documents/Document.cshtml b/Elwig/Documents/Document.cshtml
index 0f77c08..bc48103 100644
--- a/Elwig/Documents/Document.cshtml
+++ b/Elwig/Documents/Document.cshtml
@@ -10,7 +10,7 @@
     <link rel="stylesheet" href="file:///@Raw(Model.DocumentsPath)\Document.css" />
     <link rel="stylesheet" href="file:///@Raw(Model.DocumentsPath)\Document.Page.css" />
     <link rel="stylesheet" href="file:///@Raw(Model.DocumentsPath)\Document.Table.css" />
-    @if (Model.DoublePaged) {
+    @if (Model.IsDoublePaged) {
         <style>
             @@page :left {
                 margin: 25mm 25mm 35mm 20mm;
@@ -34,14 +34,14 @@
         <div class="pre-footer">
             <span class="date">@($"{Model.Date:dddd, d. MMMM yyyy}")</span>
             <span class="doc-id">@Model.DocumentId</span>
-            <span class="page"></span>
+            <span><span class="page"></span>@Raw(Model.IsPreview ? " <b>(vorläufig)</b>" : "")</span>
         </div>
         <footer>@Raw(Model.Footer)</footer>
     </div>
-    @if (Model.DoublePaged) {
+    @if (Model.IsDoublePaged) {
         <div class="footer-wrapper left">
             <div class="pre-footer">
-                <span class="page"></span>
+                <span>@Raw(Model.IsPreview ? "<b>(vorläufig)</b> " : "")<span class="page"></span></span>
                 <span class="doc-id">@Model.DocumentId</span>
                 <span class="date">@($"{Model.Date:dddd, d. MMMM yyyy}")</span>
             </div>
diff --git a/Elwig/Documents/PaymentVariantSummary.cs b/Elwig/Documents/PaymentVariantSummary.cs
index 03feb98..738fd79 100644
--- a/Elwig/Documents/PaymentVariantSummary.cs
+++ b/Elwig/Documents/PaymentVariantSummary.cs
@@ -27,6 +27,7 @@ namespace Elwig.Documents {
             Data = data;
             CurrencySymbol = v.Season.Currency.Symbol ?? v.Season.Currency.Code;
             MemberNum = v.Credits.Count;
+            IsPreview = MemberNum == 0;
             DeliveryNum = v.DeliveryPartPayments.DistinctBy(p => p.DeliveryPart.Delivery).Count();
             DeliveryPartNum = v.DeliveryPartPayments.Count;
             ModifierStat = AppDbContext.GetModifierStats(v.Year, v.AvNr).GetAwaiter().GetResult();
diff --git a/Elwig/Helpers/Utils.cs b/Elwig/Helpers/Utils.cs
index d32c50d..ff9b91d 100644
--- a/Elwig/Helpers/Utils.cs
+++ b/Elwig/Helpers/Utils.cs
@@ -540,15 +540,29 @@ namespace Elwig.Helpers {
 
         public static async Task ExportDocument(Document doc, ExportMode mode, string? filename = null, (Member Member, string Subject, string Text)? emailData = null) {
             if (mode == ExportMode.Print && !App.Config.Debug) {
+                if (doc.IsPreview) {
+                    MessageBox.Show("Dieses Dokument ist als vorläufig markiert und kann daher nicht ausgedruckt werden!",
+                        "Vorläufiges Dokument", MessageBoxButton.OK, MessageBoxImage.Error);
+                    return;
+                }
                 await doc.Generate();
                 await doc.Print();
             } else if (mode == ExportMode.Email && emailData is (Member, string, string) e) {
+                if (doc.IsPreview) {
+                    MessageBox.Show("Dieses Dokument ist als vorläufig markiert und kann daher nicht verschickt werden!",
+                        "Vorläufiges Dokument", MessageBoxButton.OK, MessageBoxImage.Error);
+                    return;
+                }
                 await doc.Generate();
                 var success = await SendEmail(e.Member, e.Subject, e.Text, [doc]);
                 if (success)
                     MessageBox.Show("Die E-Mail wurde erfolgreich verschickt!\n\nEs kann einige Minuten dauern, bis die E-Mail im Posteingang des Empfängers aufscheint.", "E-Mail verschickt",
                         MessageBoxButton.OK, MessageBoxImage.Information);
             } else if (mode == ExportMode.SavePdf) {
+                if (doc.IsPreview) {
+                    MessageBox.Show("Dieses Dokument ist als vorläufig markiert und sollte daher nicht langfristig gespeichert werden!",
+                        "Vorläufiges Dokument", MessageBoxButton.OK, MessageBoxImage.Warning);
+                }
                 var d = new SaveFileDialog() {
                     FileName = $"{NormalizeFileName(filename ?? doc.Title)}.pdf",
                     DefaultExt = "pdf",
diff --git a/Elwig/Windows/MailWindow.xaml.cs b/Elwig/Windows/MailWindow.xaml.cs
index 55e5251..db5f339 100644
--- a/Elwig/Windows/MailWindow.xaml.cs
+++ b/Elwig/Windows/MailWindow.xaml.cs
@@ -733,6 +733,18 @@ namespace Elwig.Windows {
                 }).ToList()
             }).ToList();
 
+            var hasPreviewDocs = memberDocs.Any(m => m.Docs.Any(d => d.Doc.IsPreview));
+            if (hasPreviewDocs) {
+                var res = MessageBox.Show("Einige der ausgewählten Dokumente sind nur als vorläufig zu betrachten und können daher nicht verschickt/ausgedruckt werden!\n\nDies könnte an einer noch nicht festgesetzen Auszahlungsvariante liegen.\n\nSoll mit dem Generieren fortgefahren werden?",
+                    "Vorläufige Dokumente", MessageBoxButton.OKCancel, MessageBoxImage.Warning, MessageBoxResult.Cancel);
+                if (res != MessageBoxResult.OK) {
+                    UnlockInputs();
+                    GenerateButton.IsEnabled = true;
+                    Mouse.OverrideCursor = null;
+                    return;
+                }
+            }
+
             var printMode = PostalAllInput.IsChecked == true ? 3 :
                 PostalWishInput.IsChecked == true ? 2 :
                 PostalNoEmailInput.IsChecked == true ? 1 : 0;
@@ -747,7 +759,7 @@ namespace Elwig.Windows {
                 .ToDictionary(d => d.Member, m => {
                     var docs = m.Docs.Select(d => d.Doc).ToList();
                     foreach (var doc in docs) {
-                        doc!.DoublePaged = false;
+                        doc!.IsDoublePaged = false;
                         if (doc is BusinessDocument b) {
                             b.IncludeSender = false;
                             b.Location = location;
@@ -788,7 +800,7 @@ namespace Elwig.Windows {
                         docs.Insert(0, new Letterhead(m.Member));
                     }
                     docs.ForEach(doc => {
-                        doc.DoublePaged = doublePaged;
+                        doc.IsDoublePaged = doublePaged;
                         if (doc is BusinessDocument b)
                             b.Location = location;
                     });
@@ -801,7 +813,7 @@ namespace Elwig.Windows {
             if (printDocs.Count > 0) {
                 try {
                     var print = Document.Merge(printDocs);
-                    print.DoublePaged = doublePaged;
+                    print.IsDoublePaged = doublePaged;
                     await print.Generate(new Progress<double>(v => {
                         ProgressBar.Value = 100.0 * emailNum / totalNum + v * printNum / totalNum;
                     }));
@@ -824,8 +836,8 @@ namespace Elwig.Windows {
             GenerateButton.IsEnabled = true;
             Mouse.OverrideCursor = null;
             PreviewButton.IsEnabled = true;
-            PrintButton.IsEnabled = PrintDocument != null;
-            EmailButton.IsEnabled = EmailDocuments != null && App.Config.Smtp != null;
+            PrintButton.IsEnabled = PrintDocument != null && !hasPreviewDocs;
+            EmailButton.IsEnabled = EmailDocuments != null && !hasPreviewDocs && App.Config.Smtp != null;
         }
 
         private async void PreviewButton_Click(object sender, RoutedEventArgs evt) {