WIP Estimate to pdf

Yavsc/Views/FrontOffice/Estimate.pdf.cshtml

@@ -0,0 +1,55 @@
+
+@using System.Reflection
+@using System.IO
+@using Microsoft.Extensions.WebEncoders
+@using System.Diagnostics
+@using System.Text
+@using Yavsc.Formatters
+
+@model Estimate
+@{
+   Layout = null;
+   ViewBag.Pdf = "";
+   ViewBag.TeX = "";
+   var writer = new System.IO.StringWriter();
+   var content = await Html.PartialAsync("Estimate.tex", Model );
+    content.WriteTo(writer, new TexEncoder());
+    var contentStr = writer.ToString();
+    string name = $"tmpestimtex-{Model.Id}";
+     string fullname = new FileInfo(
+         System.IO.Path.Combine(ViewBag.TempDir,name)).FullName;
+
+      FileInfo fi = new FileInfo(fullname + ".tex");
+      FileInfo fo = new FileInfo(fullname + ".pdf");
+      using (StreamWriter sw = new StreamWriter (fi.FullName))
+      {
+        sw.Write (contentStr);
+      }
+      if (!fi.Exists)
+      {
+          throw new Exception ("Source write failed");
+      }
+      using (Process p = new Process ()) {
+        p.StartInfo.WorkingDirectory = ViewBag.TempDir;
+        p.StartInfo = new ProcessStartInfo ();
+        p.StartInfo.UseShellExecute = false;
+        p.StartInfo.FileName = "/usr/bin/texi2pdf";
+        p.StartInfo.Arguments = $"--batch --build-dir=. -o {fo.FullName} {fi.FullName}";
+        p.Start ();
+        p.WaitForExit ();
+        if (p.ExitCode != 0) {
+          throw new Exception ("Pdf generation failed with exit code:" + p.ExitCode);
+          }
+      }
+      if (fo.Exists) {
+        UTF8Encoding utf8 = new UTF8Encoding();
+
+      using (StreamReader sr = new StreamReader (fo.FullName)) {
+        byte[] buffer = File.ReadAllBytes (fo.FullName);
+        ViewBag.Pdf = utf8.GetString(buffer,0,buffer.Length);
+      }
+      fo.Delete();
+      }
+      fi.Delete();
+}
+@ViewBag.Pdf