Implement Pdf printing

Elwig/Documents/Document.cshtml.cs

@@ -66,9 +66,9 @@ namespace Elwig.Documents {
             File.Copy(PdfFile.FilePath, pdfPath);
         }
 
-        public async Task Print() {
+        public async Task Print(int copies = 1) {
             if (PdfFile == null) throw new InvalidOperationException("Pdf file has not been generated yet");
-            Pdf.Print(PdfFile.FilePath);
+            await Pdf.Print(PdfFile.FilePath, copies);
         }
 
         public void Show() {

Elwig/Documents/Pdf.cs

@@ -5,11 +5,13 @@ using PdfSharp.Pdf.IO;
 using PuppeteerSharp;
 using Elwig.Helpers;
 using Elwig.Windows;
+using System.Diagnostics;
 
 namespace Elwig.Documents {
     public static class Pdf {
 
         private static readonly string Chromium = @"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe";
+        private static readonly string PdfToPrinter = App.ExePath + "PDFtoPrinter.exe";
         private static IBrowser? Browser = null;
         public static bool IsReady => Browser != null;
 
@@ -73,8 +75,12 @@ namespace Elwig.Documents {
             });
         }
 
-        public static void Print(string path) {
-            // TODO print pdf
+        public static async Task Print(string path, int copies = 1) {
+            var p = new Process() { StartInfo = new() { FileName = PdfToPrinter } };
+            p.StartInfo.ArgumentList.Add(path);
+            p.StartInfo.ArgumentList.Add($"copies={copies}");
+            p.Start();
+            await p.WaitForExitAsync();
         }
     }
 }