Add consolidation for SCSI entities.

DiscImageChef.Server/Areas/Admin/Controllers/ScsisController.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
 {
@@ -65,6 +67,88 @@ namespace DiscImageChef.Server.Areas.Admin.Controllers
             return RedirectToAction(nameof(Index));
         }
 
-        bool ScsiExists(int id) => _context.Scsi.Any(e => e.Id == id);
+        public IActionResult Consolidate()
+        {
+            List<IdHashModel> hashes = _context.Scsi.Where(m => m.InquiryData != null).
+                                                Select(m => new IdHashModel(m.Id, Hash.Sha512(m.InquiryData))).ToList();
+
+            List<IdHashModel> dups = hashes.GroupBy(x => x.Hash).Where(g => g.Count() > 1).
+                                            Select(x => hashes.FirstOrDefault(y => y.Hash == x.Key)).ToList();
+
+            for(int i = 0; i < dups.Count; i++)
+            {
+                Scsi unique = _context.Scsi.First(a => a.Id == dups[i].Id);
+
+                dups[i].Description =
+                    $"{StringHandlers.CToString(unique.Inquiry?.VendorIdentification)} {StringHandlers.CToString(unique.Inquiry?.ProductIdentification)}";
+
+                dups[i].Duplicates = hashes.Where(h => h.Hash == dups[i].Hash).Skip(1).Select(x => x.Id).ToArray();
+            }
+
+            return View(new IdHashModelForView
+            {
+                List = dups, Json = JsonConvert.SerializeObject(dups)
+            });
+        }
+
+        [HttpPost, ActionName("Consolidate"), ValidateAntiForgeryToken]
+        public IActionResult ConsolidateConfirmed(string models)
+        {
+            IdHashModel[] duplicates;
+
+            try
+            {
+                duplicates = JsonConvert.DeserializeObject<IdHashModel[]>(models);
+            }
+            catch(JsonSerializationException)
+            {
+                return BadRequest();
+            }
+
+            if(duplicates is null)
+                return BadRequest();
+
+            foreach(IdHashModel duplicate in duplicates)
+            {
+                Scsi master = _context.Scsi.FirstOrDefault(m => m.Id == duplicate.Id);
+
+                if(master is null)
+                    continue;
+
+                foreach(int duplicateId in duplicate.Duplicates)
+                {
+                    Scsi slave = _context.Scsi.FirstOrDefault(m => m.Id == duplicateId);
+
+                    if(slave is null)
+                        continue;
+
+                    foreach(Device scsiDevice in _context.Devices.Where(d => d.SCSI.Id == duplicateId))
+                    {
+                        scsiDevice.SCSI = master;
+                    }
+
+                    foreach(UploadedReport scsiReport in _context.Reports.Where(d => d.SCSI.Id == duplicateId))
+                    {
+                        scsiReport.SCSI = master;
+                    }
+
+                    foreach(TestedMedia testedMedia in _context.TestedMedia.Where(d => d.ScsiId == duplicateId))
+                    {
+                        testedMedia.ScsiId = duplicate.Id;
+                        _context.Update(testedMedia);
+                    }
+
+                    if(master.ReadCapabilities is null &&
+                       slave.ReadCapabilities != null)
+                        master.ReadCapabilities = slave.ReadCapabilities;
+
+                    _context.Scsi.Remove(slave);
+                }
+            }
+
+            _context.SaveChanges();
+
+            return RedirectToAction(nameof(Index));
+        }
     }
 }

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

@@ -0,0 +1,31 @@
+@model IdHashModelForView
+
+@{
+    ViewBag.Title = "Consolidate duplicate SCSIs";
+    Layout = "_Layout";
+}
+<h2>Consolidate duplicate SCSIs</h2>
+<div>
+    The following SCSI INQUIRY have duplicates.
+    <table class="table">
+        <thead>
+        <tbody>
+        @foreach (var item in Model.List)
+        {
+            <tr>
+                <td>
+                    @Html.DisplayFor(modelItem => item.Description)
+                </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/Scsis/Index.cshtml

@@ -34,6 +34,10 @@
     // Copyright © 2011-2019 Natalia Portillo
     // ****************************************************************************/
 }
+SCSI INQUIRY responses
+<div>
+    <a asp-action="Consolidate" class="btn btn-danger">Consolidate duplicates</a>
+</div>
 <table class="table">
     <thead>
     <tr>