Add consolidation of CHS entities.

DiscImageChef.Server/Areas/Admin/Controllers/ChsController.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using DiscImageChef.CommonTypes.Metadata;
@@ -5,6 +6,7 @@ using DiscImageChef.Server.Models;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
+using Newtonsoft.Json;
 
 namespace DiscImageChef.Server.Areas.Admin.Controllers
 {
@@ -16,7 +18,9 @@ namespace DiscImageChef.Server.Areas.Admin.Controllers
         public ChsController(DicServerContext context) => _context = context;
 
         // GET: Admin/Chs
-        public async Task<IActionResult> Index() => View(await _context.Chs.ToListAsync());
+        public async Task<IActionResult> Index() =>
+            View(await _context.Chs.OrderBy(c => c.Cylinders).ThenBy(c => c.Heads).ThenBy(c => c.Sectors).
+                                ToListAsync());
 
         // GET: Admin/Chs/Delete/5
         public async Task<IActionResult> Delete(int? id)
@@ -47,6 +51,69 @@ namespace DiscImageChef.Server.Areas.Admin.Controllers
             return RedirectToAction(nameof(Index));
         }
 
-        bool ChsExists(int id) => _context.Chs.Any(e => e.Id == id);
+        public IActionResult Consolidate()
+        {
+            List<ChsModel> dups = _context.Chs.GroupBy(x => new
+            {
+                x.Cylinders, x.Heads, x.Sectors
+            }).Where(x => x.Count() > 1).Select(x => new ChsModel
+            {
+                Cylinders = x.Key.Cylinders, Heads = x.Key.Heads, Sectors = x.Key.Sectors
+            }).ToList();
+
+            return View(new ChsModelForView
+            {
+                List = dups, Json = JsonConvert.SerializeObject(dups)
+            });
+        }
+
+        [HttpPost, ActionName("Consolidate"), ValidateAntiForgeryToken]
+        public IActionResult ConsolidateConfirmed(string models)
+        {
+            ChsModel[] duplicates;
+
+            try
+            {
+                duplicates = JsonConvert.DeserializeObject<ChsModel[]>(models);
+            }
+            catch(JsonSerializationException)
+            {
+                return BadRequest();
+            }
+
+            if(duplicates is null)
+                return BadRequest();
+
+            foreach(ChsModel duplicate in duplicates)
+            {
+                Chs master = _context.Chs.FirstOrDefault(m => m.Cylinders == duplicate.Cylinders &&
+                                                              m.Heads     == duplicate.Heads     &&
+                                                              m.Sectors   == duplicate.Sectors);
+
+                if(master is null)
+                    continue;
+
+                foreach(Chs chs in _context.Chs.Where(m => m.Cylinders == duplicate.Cylinders &&
+                                                           m.Heads     == duplicate.Heads     &&
+                                                           m.Sectors   == duplicate.Sectors).Skip(1).ToArray())
+                {
+                    foreach(TestedMedia media in _context.TestedMedia.Where(d => d.CHS.Id == chs.Id))
+                    {
+                        media.CHS = master;
+                    }
+
+                    foreach(TestedMedia media in _context.TestedMedia.Where(d => d.CurrentCHS.Id == chs.Id))
+                    {
+                        media.CurrentCHS = master;
+                    }
+
+                    _context.Chs.Remove(chs);
+                }
+            }
+
+            _context.SaveChanges();
+
+            return RedirectToAction(nameof(Index));
+        }
     }
 }

DiscImageChef.Server/Areas/Admin/Views/Chs/Consolidate.cshtml

@@ -0,0 +1,31 @@
+@model ChsModelForView
+
+@{
+    ViewBag.Title = "Consolidate duplicate CHS";
+    Layout = "_Layout";
+}
+<h2>Consolidate duplicate CHS</h2>
+<div>
+    The following CHS have duplicates.
+    <table class="table">
+        <thead>
+        <tbody>
+        @foreach (var item in Model.List)
+        {
+            <tr>
+                <td>
+                    @Html.DisplayFor(modelItem => item.Cylinders)/@Html.DisplayFor(modelItem => item.Heads)/@Html.DisplayFor(modelItem => item.Sectors)
+                </td>
+            </tr>
+        }
+        </tbody>
+    </table>
+</div>
+<div>
+    Do you want to remove the duplicates?
+    <form asp-action="Consolidate" enctype="multipart/form-data">
+        <input type="hidden" asp-for="Json" name="models" />
+        <a asp-action="Index" class="btn btn-primary">Back to List</a>
+        <input class="btn btn-danger" type="submit" value="Consolidate" />
+    </form>
+</div>

DiscImageChef.Server/Areas/Admin/Views/Chs/Index.cshtml

@@ -33,6 +33,9 @@
     // Copyright © 2011-2019 Natalia Portillo
     // ****************************************************************************/
 }
+<div>
+    <a asp-action="Consolidate" class="btn btn-danger">Consolidate duplicates</a>
+</div>
 <table class="table">
     <thead>
     <tr>

DiscImageChef.Server/Models/ChsModel.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+
+namespace DiscImageChef.Server.Models
+{
+    public class ChsModel
+    {
+        public ushort Cylinders { get; set; }
+        public ushort Heads     { get; set; }
+        public ushort Sectors   { get; set; }
+    }
+
+    public class ChsModelForView
+    {
+        public List<ChsModel> List { get; set; }
+        public string         Json { get; set; }
+    }
+}