From ca1b68aa4fc5f69f1497069a421e2e8eeb135e86 Mon Sep 17 00:00:00 2001
From: Lorenz Stechauner <lorenz.stechauner@necronda.net>
Date: Thu, 28 Sep 2023 19:38:29 +0200
Subject: [PATCH] Documents: Add Letterhead

---
 Elwig/Documents/Document.cshtml.cs      | 80 ++++++++++++++++++++-----
 Elwig/Documents/Html.cs                 |  1 +
 Elwig/Documents/Letterhead.cshtml       |  9 +++
 Elwig/Documents/Letterhead.cshtml.cs    |  9 +++
 Elwig/Documents/style-page.css          |  3 +
 Elwig/Windows/MemberAdminWindow.xaml.cs | 20 +++++++
 6 files changed, 107 insertions(+), 15 deletions(-)
 create mode 100644 Elwig/Documents/Letterhead.cshtml
 create mode 100644 Elwig/Documents/Letterhead.cshtml.cs

diff --git a/Elwig/Documents/Document.cshtml.cs b/Elwig/Documents/Document.cshtml.cs
index ced43a6..e51627f 100644
--- a/Elwig/Documents/Document.cshtml.cs
+++ b/Elwig/Documents/Document.cshtml.cs
@@ -2,11 +2,15 @@ using System;
 using System.Threading.Tasks;
 using System.IO;
 using Elwig.Helpers;
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+using System.Linq;
 
 namespace Elwig.Documents {
-    public abstract class Document : IDisposable {
+    public abstract partial class Document : IDisposable {
 
-        private TempFile? PdfFile = null;
+        private TempFile? _pdfFile = null;
+        private string? _renderedHtml = null;
 
         public bool ShowFoldMarks = App.Config.Debug;
 
@@ -35,17 +39,56 @@ namespace Elwig.Documents {
             Date = DateTime.Today;
         }
 
+        [GeneratedRegex(@"</body>.*?</footer>\s*</div>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled)]
+        private static partial Regex GeneratedDocumentHeaderRegex();
+        private static readonly Regex DocumentHeaderRegex = GeneratedDocumentHeaderRegex();
+
+        [GeneratedRegex(@"<style>.*?/style>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled)]
+        private static partial Regex GeneratedHtmlStyleRegex();
+        private static readonly Regex HtmlStyleRegex = GeneratedHtmlStyleRegex();
+
+        [GeneratedRegex(@"<link[^>]*>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled)]
+        private static partial Regex GeneratedHtmlLinkRegex();
+        private static readonly Regex HtmlLinkRegex = GeneratedHtmlLinkRegex();
+
         ~Document() {
             Dispose();
         }
 
         public void Dispose() {
-            PdfFile?.Dispose();
-            PdfFile = null;
+            _pdfFile?.Dispose();
+            _pdfFile = null;
             GC.SuppressFinalize(this);
         }
 
-        private Task<string> Render() {
+        public static async Task<Document> Merge(IEnumerable<Document> docs) {
+            string html = "";
+            var styles = new List<string>();
+            foreach (var d in docs) {
+                var h = await d.Render();
+                var s = HtmlStyleRegex.Matches(h).Select(m => m.Value).ToList();
+                var l = HtmlLinkRegex.Matches(h).Select(m => m.Value).ToList();
+                if (s.All(styles.Contains)) {
+                    h = HtmlStyleRegex.Replace(h, "");
+                } else {
+                    styles.AddRange(s);
+                }
+                if (l.All(styles.Contains)) {
+                    h = HtmlLinkRegex.Replace(h, "");
+                } else {
+                    styles.AddRange(l);
+                }
+                html += h;
+            }
+            html = DocumentHeaderRegex.Replace(html, "<div class='document-break'/>");
+            return new InternalDocument("Mehrere Dokumente") {
+                _renderedHtml = html,
+            };
+        }
+
+        private async Task<string> Render() {
+            if (_renderedHtml != null)
+                return _renderedHtml;
             string name;
             if (this is BusinessLetter) {
                 name = "BusinessLetter";
@@ -55,14 +98,17 @@ namespace Elwig.Documents {
                 name = "CreditNote";
             } else if (this is DeliveryJournal) {
                 name = "DeliveryJournal";
+            } else if (this is Letterhead) {
+                name = "Letterhead";
             } else {
                 throw new InvalidOperationException("Invalid document object");
             }
-            return Render(name);
+            return await Render(name);
         }
 
-        private Task<string> Render(string name) {
-            return Html.CompileRenderAsync(name, this);
+        private async Task<string> Render(string name) {
+            _renderedHtml = await Html.CompileRenderAsync(name, this);
+            return _renderedHtml;
         }
 
         public async Task Generate() {
@@ -71,22 +117,26 @@ namespace Elwig.Documents {
                 await File.WriteAllTextAsync(tmpHtml.FilePath, await Render(), Utils.UTF8);
                 await Pdf.Convert(tmpHtml.FilePath, pdf.FilePath);
             }
-            PdfFile = pdf;
+            _pdfFile = pdf;
         }
 
         public void SaveTo(string pdfPath) {
-            if (PdfFile == null) throw new InvalidOperationException("Pdf file has not been generated yet");
-            File.Copy(PdfFile.FilePath, pdfPath);
+            if (_pdfFile == null) throw new InvalidOperationException("Pdf file has not been generated yet");
+            File.Copy(_pdfFile.FilePath, pdfPath);
         }
 
         public async Task Print(int copies = 1) {
-            if (PdfFile == null) throw new InvalidOperationException("Pdf file has not been generated yet");
-            await Pdf.Print(PdfFile.FilePath, copies);
+            if (_pdfFile == null) throw new InvalidOperationException("Pdf file has not been generated yet");
+            await Pdf.Print(_pdfFile.FilePath, copies);
         }
 
         public void Show() {
-            if (PdfFile == null) throw new InvalidOperationException("Pdf file has not been generated yet");
-            Pdf.Show(PdfFile.NewReference(), Title);
+            if (_pdfFile == null) throw new InvalidOperationException("Pdf file has not been generated yet");
+            Pdf.Show(_pdfFile.NewReference(), Title);
+        }
+
+        private class InternalDocument : Document {
+            public InternalDocument(string title) : base(title) { }
         }
     }
 }
diff --git a/Elwig/Documents/Html.cs b/Elwig/Documents/Html.cs
index 0fafde9..4eb2d78 100644
--- a/Elwig/Documents/Html.cs
+++ b/Elwig/Documents/Html.cs
@@ -20,6 +20,7 @@ namespace Elwig.Documents {
             await e.CompileTemplateAsync("DeliveryNote");
             await e.CompileTemplateAsync("CreditNote");
             await e.CompileTemplateAsync("DeliveryJournal");
+            await e.CompileTemplateAsync("Letterhead");
 
             Engine = e;
             evtHandler();
diff --git a/Elwig/Documents/Letterhead.cshtml b/Elwig/Documents/Letterhead.cshtml
new file mode 100644
index 0000000..ee938be
--- /dev/null
+++ b/Elwig/Documents/Letterhead.cshtml
@@ -0,0 +1,9 @@
+@using RazorLight
+@inherits TemplatePage<Elwig.Documents.Letterhead>
+@model Elwig.Documents.Letterhead
+@{ Layout = "BusinessDocument"; }
+<style>
+    header, .footer-wrapper {
+        visibility: hidden;
+    }
+</style>
diff --git a/Elwig/Documents/Letterhead.cshtml.cs b/Elwig/Documents/Letterhead.cshtml.cs
new file mode 100644
index 0000000..588e5f5
--- /dev/null
+++ b/Elwig/Documents/Letterhead.cshtml.cs
@@ -0,0 +1,9 @@
+using Elwig.Models;
+
+namespace Elwig.Documents {
+    public class Letterhead : BusinessDocument {
+        public Letterhead(Member m) : base($"Briefkopf {m.Name}", m, true) {
+            Aside = "";
+        }
+    }
+}
diff --git a/Elwig/Documents/style-page.css b/Elwig/Documents/style-page.css
index 0fb675d..9f8c757 100644
--- a/Elwig/Documents/style-page.css
+++ b/Elwig/Documents/style-page.css
@@ -20,6 +20,9 @@
 hr.page-break {
     display: none;
 }
+.document-break {
+    break-before: page;
+}
 
 @page {
     size: A4;
diff --git a/Elwig/Windows/MemberAdminWindow.xaml.cs b/Elwig/Windows/MemberAdminWindow.xaml.cs
index 9f2fb84..4e22217 100644
--- a/Elwig/Windows/MemberAdminWindow.xaml.cs
+++ b/Elwig/Windows/MemberAdminWindow.xaml.cs
@@ -10,6 +10,7 @@ using Elwig.Models;
 using System.Threading.Tasks;
 using Microsoft.EntityFrameworkCore.ChangeTracking;
 using System.Collections.ObjectModel;
+using Elwig.Documents;
 
 namespace Elwig.Windows {
     public partial class MemberAdminWindow : AdministrationWindow {
@@ -269,6 +270,25 @@ namespace Elwig.Windows {
             Utils.MailTo(((Member)MemberList.SelectedItem).EmailAddresses.Select(a => a.Address));
         }
 
+        private async void Menu_Print_Letterheads_MgNr_Click(object sender, RoutedEventArgs evt) {
+            using var d = await Document.Merge(Context.Members
+                .Where(m => m.IsActive)
+                .OrderBy(m => m.MgNr)
+                .Select(m => new Letterhead(m)));
+            await d.Generate();
+            d.Show();
+        }
+
+        private async void Menu_Print_Letterheads_Name_Click(object sender, RoutedEventArgs evt) {
+            using var d = await Document.Merge(Context.Members
+                .Where(m => m.IsActive)
+                .OrderBy(m => m.FamilyName)
+                .ThenBy(m => m.GivenName)
+                .Select(m => new Letterhead(m)));
+            await d.Generate();
+            d.Show();
+        }
+
         private void FocusSearchInput(object sender, RoutedEventArgs evt) {
             if (!IsEditing && !IsCreating) {
                 SearchInput.Focus();