A view component

Yavsc/ApiControllers/PdfEstimateController.cs

@@ -1,19 +1,66 @@
-using System;
 using System.IO;
-using System.Security.Claims;
 using Microsoft.AspNet.Authorization;
 using Microsoft.AspNet.Mvc;
+using System.Threading.Tasks;
+using System.Web.Routing;
+using Microsoft.AspNet.Mvc.ViewComponents;
+using Microsoft.AspNet.Razor;
 
 namespace Yavsc.ApiControllers
 {
+    using Models;
+
     [Route("api/pdfestimate"), Authorize]
     public class PdfEstimateController : Controller
     {
-        [HttpGet("{id}", Name = "Get")]
+        ApplicationDbContext dbContext;
+        DefaultViewComponentHelper helper;
+        IViewComponentDescriptorCollectionProvider provider;
+        IViewComponentInvokerFactory factory;
+        RazorEngineHost host;
+        RazorTemplateEngine engine;
+        IViewComponentSelector selector;
+
+
+        public PdfEstimateController(
+            IViewComponentDescriptorCollectionProvider provider,
+            IViewComponentSelector selector,
+        IViewComponentInvokerFactory factory,
+         ApplicationDbContext context)
+        {
+            
+            this.selector = selector;
+            this.provider = provider;
+            this.factory = factory;
+            helper = new DefaultViewComponentHelper(provider, selector, factory);
+            dbContext = context;
+
+            var language = new CSharpRazorCodeLanguage();
+            host = new RazorEngineHost(language)
+            {
+                DefaultBaseClass = "RazorPage",
+                DefaultClassName = "Estimate",
+                DefaultNamespace = "Yavsc",
+            };
+
+            // Everyone needs the System namespace, right?
+            host.NamespaceImports.Add("System");
+            engine = new RazorTemplateEngine(host);
+
+            
+            /*
+            GeneratorResults razorResult =
+   engine.GenerateCode(
+
+   ) */
+        }
+
+
+        [HttpGet("get/{id}", Name = "Get"), Authorize]
         public IActionResult Get(long id)
         {
             var filename = $"estimate-{id}.pdf";
-            
+
             var cd = new System.Net.Mime.ContentDisposition
             {
                 // for example foo.bak
@@ -23,15 +70,43 @@ namespace Yavsc.ApiControllers
                 // the browser to try to show the file inline
                 Inline = false,
             };
-            
-            FileInfo fi = new FileInfo(Path.Combine(Startup.UserBillsDirName,filename));
-           
-            FileStreamResult result = null;
-            var s = fi.OpenRead();
-            
-            result = File(s,"application/x-pdf",filename);
-            
-            return result;
+
+            FileInfo fi = new FileInfo(Path.Combine(Startup.UserBillsDirName, filename));
+            if (!fi.Exists) return Ok(new { Error = "Not generated" });
+            return File(fi.OpenRead(), "application/x-pdf", filename); ;
+        }
+
+        [HttpGet("GetComponents", Name = "GetComponents")]
+        public IActionResult GetComponents()
+        {
+            return Ok(provider);
+        }
+
+        [HttpGet("estimate-{id}.tex", Name = "GetTex"), Authorize]
+        public IActionResult GetTex(long id)
+        {
+            Response.ContentType = "text/x-tex";
+
+            return ViewComponent("Estimate",new object[] { id, false });
+        }
+
+        [HttpGet("gen/{id}")]
+        public async Task<IActionResult> GeneratePdf(long id)
+        {
+             /*
+
+             using (TextWriter wr = new StringWriter()) {
+             ViewComponentContext ctx = new ViewComponentContext(
+                 selector.SelectComponent("Estimate"), new object[]{id}, 
+                 new ViewContext(),
+                 wr
+             );
+
+             }
+
+             */
+
+            return ViewComponent("Estimate",new object[] { id, true } );
         }
     }
 }

Yavsc/Controllers/FrontOfficeController.cs

@@ -8,16 +8,6 @@ using Microsoft.Extensions.Logging;
 using Yavsc.Models.Booking;
 using Yavsc.Helpers;
 using System;
-using System.IO;
-using System.Diagnostics;
-using System.Text;
-using Microsoft.AspNet.Mvc.ViewFeatures;
-using Microsoft.AspNet.Razor;
-using Microsoft.AspNet.Mvc.ViewEngines;
-using Microsoft.AspNet.Mvc.Rendering;
-using Microsoft.Extensions.OptionsModel;
-using System.Threading.Tasks;
-using System.Security.Claims;
 
 namespace Yavsc.Controllers
 {
@@ -111,23 +101,11 @@ namespace Yavsc.Controllers
             return View("Estimate.tex", estimate);
         }
 
-        class TeOtions : IOptions<MvcViewOptions>
-        {
-            public MvcViewOptions Value
-            {
-                get
-                {
-                    return new MvcViewOptions();
-                }
-            }
-        }
-
         [Authorize,Route("Estimate-{id}.pdf")]
-        public async Task<IActionResult> EstimatePdf(long id)
+        public IActionResult EstimatePdf(long id)
         {
             ViewBag.TempDir = Startup.SiteSetup.TempDir;
             ViewBag.BillsDir = Startup.UserBillsDirName;
-        
             var estimate = _context.Estimates.Include(x => x.Query)
             .Include(x => x.Query.Client)
             .Include(x => x.Query.PerformerProfile)
@@ -136,102 +114,7 @@ namespace Yavsc.Controllers
             .Include(e => e.Bill).FirstOrDefault(x => x.Id == id); 
             if (estimate==null)
                 throw new Exception("No data");
-            
             return View("Estimate.pdf",estimate);
-            /* 
-            await result.ExecuteResultAsync(ActionContext);
-            var cd = new System.Net.Mime.ContentDisposition
-            {
-                // for example foo.bak
-                FileName = $"estimate-{id}.pdf",
-
-                // always prompt the user for downloading, set to true if you want 
-                // the browser to try to show the file inline
-                Inline = false,
-            };
-            Response.Headers.Add("Content-Disposition", cd.ToString());
-            return File((Byte[])ViewData["Pdf"], "application/x-pdf"); */
         }
- /* 
-
-        [Produces("application/x-pdf"), Authorize, Route("testimate-{id}.pdf")]
-        public async Task<IActionResult> BadEstimatePdf(long id)
-        {
-
-            var tempDir = Startup.SiteSetup.TempDir;
-
-            string name = $"tmpestimtex-{id}";
-            string fullname = new FileInfo(
-                System.IO.Path.Combine(tempDir, name)).FullName;
-            var writer = new System.IO.StringWriter();
-            try
-    {
-        using (StringWriter sw = new StringWriter())
-        {
-            Microsoft.AspNet.Mvc.ViewEngines.CompositeViewEngine ve = new CompositeViewEngine(
-                new TeOtions {}
-            );
-            
-            ViewEngineResult viewResult = ve.FindPartialView(ActionContext, $"estimate-{id}.tex");
-            ViewContext viewContext = new ViewContext(); // ActionContext, viewResult.View, ViewData, TempData, sw);
-            await viewResult.View.RenderAsync(viewContext);
-        }
-    } catch (Exception ex)
-    {
-        
-    }
-
-
-
-
-            FileInfo fo = new FileInfo(fullname + ".pdf");
-            if (!fi.Exists)
-            {
-                throw new Exception("Source write failed");
-            }
-            using (Process p = new Process())
-            {
-                p.StartInfo.WorkingDirectory = tempDir;
-                p.StartInfo = new ProcessStartInfo();
-                p.StartInfo.UseShellExecute = false;
-                p.StartInfo.FileName = "/usr/bin/texi2pdf";
-                p.StartInfo.Arguments = $"--batch --build-dir=.";
-                
-                p.Start();
-                            
-            using (p.StandardInput)
-            {
-                
-            }
-                p.WaitForExit();
-                if (p.ExitCode != 0)
-                {
-                    throw new Exception("Pdf generation failed with exit code:" + p.ExitCode);
-                }
-            }
-            byte[] pdf = null;
-            if (fo.Exists)
-            {
-                using (StreamReader sr = new StreamReader(fo.FullName))
-                {
-                    pdf = System.IO.File.ReadAllBytes(fo.FullName);
-                }
-                fo.Delete();
-            }
-            fi.Delete();
-
-
-            var cd = new System.Net.Mime.ContentDisposition
-            {
-                // for example foo.bak
-                FileName = $"estimate-{id}.pdf",
-
-                // always prompt the user for downloading, set to true if you want 
-                // the browser to try to show the file inline
-                Inline = false,
-            };
-            Response.Headers.Add("Content-Disposition", cd.ToString());
-            return File(pdf, "application/x-pdf");
-        } */
     } 
-}
+}

Yavsc/Helpers/TagHelpers.cs

@@ -68,7 +68,6 @@ namespace Yavsc.Helpers
         /// <summary>
         /// Transforms a string of Markdown into HTML.
         /// </summary>
-        /// <param name="helper">HtmlHelper - Not used, but required to make this an extension method.</param>
         /// <param name="text">The Markdown that should be transformed.</param>
         /// <param name="urlBaseLocation">The url Base Location.</param>
         /// <returns>The HTML representation of the supplied Markdown.</returns>

Yavsc/Helpers/TeXHelpers.cs

@@ -1,4 +1,12 @@
+using System;
+using System.IO;
 using System.Linq;
+using Microsoft.AspNet.Http;
+using Microsoft.AspNet.Mvc;
+using Microsoft.AspNet.Mvc.ModelBinding;
+using Microsoft.AspNet.Mvc.Rendering;
+using Microsoft.AspNet.Mvc.ViewEngines;
+using Microsoft.AspNet.Mvc.ViewFeatures;
 
 namespace Yavsc.Helpers
 {
@@ -11,5 +19,32 @@ namespace Yavsc.Helpers
 
             return string.Join(separator, items);
         }
+        public static string RenderViewToString(
+            this Controller controller, IViewEngine engine,
+            IHttpContextAccessor httpContextAccessor, 
+         string viewName, object model)
+{
+   using (var sw = new StringWriter())
+  {
+      if (engine == null)
+       throw new InvalidOperationException("no engine");
+       
+    // try to find the specified view
+    controller.TryValidateModel(model);
+    ViewEngineResult viewResult = engine.FindPartialView(controller.ActionContext, viewName);
+    // create the associated context
+    ViewContext viewContext = new ViewContext();
+    viewContext.ActionDescriptor = controller.ActionContext.ActionDescriptor;
+    viewContext.HttpContext = controller.ActionContext.HttpContext;
+    viewContext.TempData = controller.TempData;
+    viewContext.View = viewResult.View;
+    viewContext.Writer = sw;
+    
+    // write the render view with the given context to the stringwriter
+    viewResult.View.RenderAsync(viewContext);
+    viewResult.EnsureSuccessful();
+    return sw.GetStringBuilder().ToString();
+  }
+}
     }
 }

Yavsc/ViewComponents/EstimateViewComponent.cs

@@ -0,0 +1,58 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNet.Mvc;
+using Microsoft.Data.Entity;
+using Yavsc.Models;
+using Yavsc.Models.Billing;
+using Yavsc.ViewModels.Gen;
+
+namespace Yavsc.ViewComponents
+{
+    public class EstimateViewComponent : ViewComponent
+    {
+        ApplicationDbContext dbContext;
+        public EstimateViewComponent(ApplicationDbContext dbContext)
+        {
+            this.dbContext = dbContext;
+        }
+        public async Task<IViewComponentResult> InvokeAsync(long id, bool toPdf = false)
+        {
+            Estimate estimate =
+            dbContext.Estimates.Include(x => x.Query)
+                   .Include(x => x.Query.Client)
+                   .Include(x => x.Query.PerformerProfile)
+                   .Include(x => x.Query.PerformerProfile.OrganizationAddress)
+                   .Include(x => x.Query.PerformerProfile.Performer)
+                   .Include(e => e.Bill).FirstOrDefault(x => x.Id == id);
+            if (estimate == null)
+                throw new Exception("No data");
+            if (toPdf)
+            {
+                string tex = null;
+                var oldWriter = ViewComponentContext.ViewContext.Writer;
+
+                using (var writer = new StringWriter())
+                {
+                    this.ViewComponentContext.ViewContext.Writer = writer;
+
+                    var resultTex = View("Estimate_tex", estimate);
+                    resultTex.Execute(this.ViewComponentContext);
+                    tex = writer.ToString();
+
+                }
+                ViewComponentContext.ViewContext.Writer = oldWriter;
+                
+                return this.View("Estimate_pdf", 
+                        new PdfGenerationViewModel{ 
+                            TeXSource = tex, 
+                            DestDir = Startup.UserBillsDirName,
+                            BaseFileName = $"estimate-{id}"
+                        } );
+            }
+            return this.View("Estimate_tex", estimate);
+        }
+
+    }
+}

Yavsc/ViewModels/Gen/PdfGenerationViewModel.cs

@@ -0,0 +1,14 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Yavsc.ViewModels.Gen
+{
+    public class PdfGenerationViewModel
+    {
+        [Required]
+        public string TeXSource { get; set; }
+        [Required]
+        public string BaseFileName { get; set; }
+        [Required]
+        public string DestDir { get; set; }
+    }
+}

Yavsc/Views/Estimate/Details.cshtml

@@ -39,6 +39,11 @@
     <a asp-action="Index">@SR["Back to List"]</a> |
     @{ var filenametex = $"estimate-{Model.Id}.tex" ; 
     var filenamepdf = $"estimate-{Model.Id}.pdf" ;}
-    <a href="~/do/@filenametex" >Export au format LaTeX</a>
-    <a href="~/do/@filenamepdf" >Export au format Pdf</a>
+    <a href="~/api/pdfestimate/gettex/@Model.Id" >Export au format LaTeX</a> |
+
+
+<form action="~/api/pdfestimate/gen/@Model.Id" method="GET">
+    <input type="submit" value="Générer le Pdf"/>
+</form>
+   
 </p>

Yavsc/Views/FrontOffice/Estimate.pdf.cshtml

@@ -1,51 +0,0 @@
-@using System.Reflection;
-@using System.IO;
-@using Microsoft.Extensions.WebEncoders;
-@using System.Diagnostics;
-@using System.Text;
-@using Yavsc.Formatters;
-@model Estimate
-@{
-    if (ViewBag.TempDir==null) { throw new InvalidOperationException(); }
-
-    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 = $"estimate-{Model.Id}";
-    string fullname = new FileInfo(
-         System.IO.Path.Combine(ViewBag.TempDir,name)).FullName;
-    string ofullname = new FileInfo(
-         System.IO.Path.Combine(ViewBag.BillsDir,name)).FullName;
-
-      FileInfo fi = new FileInfo(fullname + ".tex");
-      FileInfo fo = new FileInfo(ofullname + ".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);
-          }
-      }
-      ViewBag.Success = fo.Exists; 
-      fi.Delete();
-      var uri = $"~/api/pdfestimate/{Model.Id}";
-
-}
-
-<a href="@uri" >@uri</a>

Yavsc/Views/Shared/Components/Estimate/Estimate_pdf.cshtml

@@ -0,0 +1,50 @@
+@using System.Reflection
+@using System.IO
+@using Microsoft.Extensions.WebEncoders
+@using System.Diagnostics
+@using System.Text
+@using Yavsc.Formatters
+@model Yavsc.ViewModels.Gen.PdfGenerationViewModel
+@{
+    string errorMsg = null;
+    var billdir = Model.DestDir;
+    var tempdir = Startup.SiteSetup.TempDir;
+    string name = Model.BaseFileName;
+    string fullname = new FileInfo(
+         System.IO.Path.Combine(tempdir,name)).FullName;
+    string ofullname = new FileInfo(
+         System.IO.Path.Combine(billdir,name)).FullName;
+
+      FileInfo fi = new FileInfo(fullname + ".tex");
+      FileInfo fo = new FileInfo(ofullname + ".pdf");
+      using (StreamWriter sw = new StreamWriter (fi.FullName))
+      {
+        sw.Write (Model.TeXSource);
+      }
+      if (!fi.Exists)
+      {
+          errorMsg = "Source write failed";
+      }
+      else {
+      using (Process p = new Process ()) {
+        p.StartInfo.WorkingDirectory = 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) {
+            errorMsg = $"Pdf generation failed with exit code: {p.ExitCode}";
+          }
+      }
+      fi.Delete();
+      }
+      ViewBag.GenSuccess = fo.Exists; 
+}
+@if (ViewBag.GenSuccess) {
+  @($"{name}.pdf")
+} else {
+  @errorMsg
+  <text>Something went wrong ...</text>
+}

Yavsc/Views/Shared/Components/Estimate/Estimate_tex.cshtml

@@ -1,6 +1,6 @@
-@model Estimate
 @using Yavsc.Helpers
 @using System.Globalization
+@model Estimate
 @{
     Layout = null;
     var pro = Model.Query.PerformerProfile;
@@ -10,8 +10,7 @@
     var proaddr = Model.Query?.PerformerProfile.OrganizationAddress.Address;
     var proaddrn = (proaddr!=null) ? proaddr.NewLinesWith("\\\\\n") : null ;
     var proaddrm = (proaddr!=null) ? proaddr.NewLinesWith(" - ") : null ;
-}
-\documentclass[french,11pt]{article}
+}\documentclass[french,11pt]{article}
 \usepackage{eurosym}
 \usepackage{babel}
 \usepackage[T1]{fontenc}

Yavsc/project.json

@@ -140,5 +140,6 @@
     "postrestore": "echo after restoring packages",
     "prepublish": "gulp min",
     "postpublish": "echo \"  . ./contrib/postPublish.sh # to push in prod.\""
-  }
+  },
+   "embed": "Views/**/*.cshtml"
 }