Bring the autocomplete bo to live

UserService.DatabaseLayer/Repositories/BaseRepository.cs

@@ -0,0 +1,57 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using UserService.DatabaseLayer.DataModels;
+using UserService.Infrastructure.DataModels;
+
+namespace UserService.DatabaseLayer.Repositories
+{
+    public class BaseRepository<T> where T : Node
+    {
+        protected Func<UserServiceDbContext, DbSet<T>> Context { get; }
+
+        protected BaseRepository(Func<UserServiceDbContext, DbSet<T>> context)
+        {
+            Context = context;
+        }
+
+        public virtual async Task<IReadOnlyList<T>> GetAllAsync(Expression<Func<T, bool>>? predicate = null, CancellationToken token = default)
+        {
+            await using var db = new UserServiceDbContext();
+            return await Context(db).Include(x => x.Parent).WhereOrDefault(predicate).ToListAsync(token).ConfigureAwait(false);
+        }
+
+        public async Task<T?> GetAsync(Expression<Func<T, bool>> predicate, CancellationToken token = default)
+        {
+            await using var db = new UserServiceDbContext();
+            return await Context(db).FirstOrDefaultAsync(predicate, token).ConfigureAwait(false);
+        }
+
+        public async Task AddAsync(T entity, CancellationToken token = default)
+        {
+            await using var db = new UserServiceDbContext();
+            await Context(db).AddAsync(@entity, token).ConfigureAwait(false);
+            await db.SaveChangesAsync(token).ConfigureAwait(false);
+        }
+
+        public async Task<bool> UpdateAsync(T entity, CancellationToken token = default)
+        {
+            await using var db = new UserServiceDbContext();
+            Context(db).Update(entity);
+            var items= await db.SaveChangesAsync(token).ConfigureAwait(false);
+            return items > 0;
+        }
+
+        public async Task DeleteAsync(T entity, CancellationToken token = default)
+        {
+            await using var db = new UserServiceDbContext();
+            Context(db).Remove(entity);
+            await db.SaveChangesAsync(token).ConfigureAwait(false);
+        }
+    }
+}