Allow to add and remove instruction set extensions from processor details in admin view.

Marechai/Services/InstructionSetExtensionsByProcessorService.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Marechai.Database.Models;
+using Marechai.ViewModels;
+using Microsoft.EntityFrameworkCore;
+
+namespace Marechai.Services
+{
+    public class InstructionSetExtensionsByProcessorService
+    {
+        readonly MarechaiContext _context;
+
+        public InstructionSetExtensionsByProcessorService(MarechaiContext context) => _context = context;
+
+        public async Task<List<InstructionSetExtensionByProcessorViewModel>> GetByProcessor(int processorId) =>
+            await _context.InstructionSetExtensionsByProcessor.Where(e => e.ProcessorId == processorId).
+                           Select(e => new InstructionSetExtensionByProcessorViewModel
+                           {
+                               Id          = e.Id, Extension = e.Extension.Extension, Processor = e.Processor.Name,
+                               ProcessorId = e.ProcessorId, ExtensionId = e.ExtensionId
+                           }).OrderBy(e => e.Extension).ToListAsync();
+
+        public async Task DeleteAsync(int id)
+        {
+            InstructionSetExtensionsByProcessor item = await _context.InstructionSetExtensionsByProcessor.FindAsync(id);
+
+            if(item is null)
+                return;
+
+            _context.InstructionSetExtensionsByProcessor.Remove(item);
+
+            await _context.SaveChangesAsync();
+        }
+
+        public async Task<int> CreateAsync(int processorId, int extensionId)
+        {
+            var item = new InstructionSetExtensionsByProcessor
+            {
+                ProcessorId = processorId, ExtensionId = extensionId
+            };
+
+            await _context.InstructionSetExtensionsByProcessor.AddAsync(item);
+            await _context.SaveChangesAsync();
+
+            return item.Id;
+        }
+    }
+}