initial commit

Features/Thirdparty/Customer/Cqrs/LookupCustomerHandler.cs

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+using Indotalent.Infrastructure.Database;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+
+namespace Indotalent.Features.Thirdparty.Customer.Cqrs;
+
+public class LookupCustomerResponse
+{
+    public List<LookupItem> CustomerGroups { get; set; } = new();
+    public List<LookupItem> CustomerCategories { get; set; } = new();
+}
+
+public class LookupItem
+{
+    public string? Id { get; set; }
+    public string? Name { get; set; }
+}
+
+public record LookupCustomerQuery() : IRequest<LookupCustomerResponse>;
+
+public class LookupCustomerHandler : IRequestHandler<LookupCustomerQuery, LookupCustomerResponse>
+{
+    private readonly AppDbContext _context;
+
+    public LookupCustomerHandler(AppDbContext context) => _context = context;
+
+    public async Task<LookupCustomerResponse> Handle(LookupCustomerQuery request, CancellationToken cancellationToken)
+    {
+        var result = new LookupCustomerResponse();
+
+        result.CustomerGroups = await _context.CustomerGroup
+            .AsNoTracking()
+            .OrderBy(x => x.Name)
+            .Select(x => new LookupItem { Id = x.Id, Name = x.Name })
+            .ToListAsync(cancellationToken);
+
+        result.CustomerCategories = await _context.CustomerCategory
+            .AsNoTracking()
+            .OrderBy(x => x.Name)
+            .Select(x => new LookupItem { Id = x.Id, Name = x.Name })
+            .ToListAsync(cancellationToken);
+
+        return result;
+    }
+}