initial commit

Features/Purchase/PurchaseOrder/Cqrs/GetPurchaseOrderLookupHandler.cs

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+using Indotalent.Infrastructure.Database;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using Indotalent.Data.Enums;
+using Indotalent.ConfigBackEnd.Extensions;
+
+namespace Indotalent.Features.Purchase.PurchaseOrder.Cqrs;
+
+public class PurchaseOrderLookupResponse
+{
+    public List<LookupItem> Vendors { get; set; } = new();
+    public List<LookupItem> Taxes { get; set; } = new();
+    public List<LookupItem> Products { get; set; } = new();
+    public List<LookupStatusItem> Statuses { get; set; } = new();
+}
+
+public class LookupItem
+{
+    public string? Id { get; set; }
+    public string? Name { get; set; }
+}
+
+public class LookupStatusItem
+{
+    public int Value { get; set; }
+    public string? Name { get; set; }
+}
+
+public record GetPurchaseOrderLookupQuery() : IRequest<PurchaseOrderLookupResponse>;
+
+public class GetPurchaseOrderLookupHandler : IRequestHandler<GetPurchaseOrderLookupQuery, PurchaseOrderLookupResponse>
+{
+    private readonly AppDbContext _context;
+    public GetPurchaseOrderLookupHandler(AppDbContext context) => _context = context;
+
+    public async Task<PurchaseOrderLookupResponse> Handle(GetPurchaseOrderLookupQuery request, CancellationToken cancellationToken)
+    {
+        var response = new PurchaseOrderLookupResponse();
+
+        response.Vendors = await _context.Vendor.AsNoTracking()
+            .OrderBy(x => x.Name)
+            .Select(x => new LookupItem { Id = x.Id, Name = x.Name })
+            .ToListAsync(cancellationToken);
+
+        response.Taxes = await _context.Tax.AsNoTracking()
+            .OrderBy(x => x.Name)
+            .Select(x => new LookupItem { Id = x.Id, Name = x.Name })
+            .ToListAsync(cancellationToken);
+
+        response.Products = await _context.Product.AsNoTracking()
+            .OrderBy(x => x.Name)
+            .Select(x => new LookupItem { Id = x.Id, Name = x.Name })
+            .ToListAsync(cancellationToken);
+
+        response.Statuses = Enum.GetValues(typeof(PurchaseOrderStatus))
+            .Cast<PurchaseOrderStatus>()
+            .Select(x => new LookupStatusItem
+            {
+                Value = (int)x,
+                Name = x.GetDescription()
+            }).ToList();
+
+        return response;
+    }
+}