Add option to consolidate duplicate ATA entities.

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

@@ -1,9 +1,11 @@
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using DiscImageChef.Server.Models;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
+using Newtonsoft.Json;
 
 namespace DiscImageChef.Server.Areas.Admin.Controllers
 {
@@ -36,7 +38,6 @@ namespace DiscImageChef.Server.Areas.Admin.Controllers
             return View(ata);
         }
 
-
         // GET: Admin/Atas/Delete/5
         public async Task<IActionResult> Delete(int? id)
         {
@@ -67,5 +68,77 @@ namespace DiscImageChef.Server.Areas.Admin.Controllers
         }
 
         bool AtaExists(int id) => _context.Ata.Any(e => e.Id == id);
+
+        public IActionResult Consolidate()
+        {
+            List<IdHashModel> hashes =
+                _context.Ata.Select(m => new IdHashModel(m.Id, Hash.Sha512(m.Identify))).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++)
+            {
+                CommonTypes.Metadata.Ata unique = _context.Ata.First(a => a.Id == dups[i].Id);
+
+                dups[i].Description = unique.IdentifyDevice?.Model;
+                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)
+            {
+                foreach(int duplicateId in duplicate.Duplicates)
+                {
+                    foreach(Device ataDevice in _context.Devices.Where(d => d.ATAId == duplicateId))
+                    {
+                        ataDevice.ATAId = duplicate.Id;
+                    }
+
+                    foreach(Device atapiDevice in _context.Devices.Where(d => d.ATAPIId == duplicateId))
+                    {
+                        atapiDevice.ATAPIId = duplicate.Id;
+                    }
+
+                    foreach(UploadedReport ataReport in _context.Reports.Where(d => d.ATAId == duplicateId))
+                    {
+                        ataReport.ATAId = duplicate.Id;
+                    }
+
+                    foreach(UploadedReport atapiReport in _context.Reports.Where(d => d.ATAPIId == duplicateId))
+                    {
+                        atapiReport.ATAPIId = duplicate.Id;
+                    }
+
+                    _context.Ata.Remove(_context.Ata.First(d => d.Id == duplicateId));
+                }
+            }
+
+            _context.SaveChanges();
+
+            return RedirectToAction(nameof(Index));
+        }
     }
 }