Add FlatPaymentController with RESTful payment endpoints

Introduced FlatPaymentController under Distribution.Features.Payment, providing GET and POST endpoints at /api/payments. Supports listing, retrieving, and creating payments with filtering and error handling. Business logic is delegated to PaymentService.

Distribution/Features/Payment/FlatPaymentController.cs

@@ -0,0 +1,38 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace Distribution.Features.Payment;
+
+[ApiController]
+[Route("api/payments")]
+public class FlatPaymentController(PaymentService service) : ControllerBase
+{
+    [HttpGet]
+    public async Task<IActionResult> GetAll(
+        [FromQuery] Guid? storeId,
+        [FromQuery] Guid? saleId,
+        [FromQuery] int page = 1,
+        [FromQuery] int pageSize = 20)
+    {
+        var result = await service.GetAllAsync(storeId, saleId, page, pageSize);
+        return Ok(result);
+    }
+
+    [HttpGet("{id:guid}")]
+    public async Task<IActionResult> GetById(Guid id)
+    {
+        var result = await service.GetByIdAsync(id);
+        return result is null ? NotFound() : Ok(result);
+    }
+
+    [HttpPost]
+    public async Task<IActionResult> Create(CreateFlatPaymentRequest request, CancellationToken ct)
+    {
+        try
+        {
+            var inner = new CreatePaymentRequest(request.Amount, request.Method);
+            var result = await service.CreateAsync(request.SaleId, inner, ct);
+            return result is null ? NotFound(new { error = "Sale not found or access denied" }) : Ok(result);
+        }
+        catch (InvalidOperationException ex) { return BadRequest(new { error = ex.Message }); }
+    }
+}

Distribution/Features/Payment/IPaymentRepository.cs

@@ -4,6 +4,9 @@ namespace Distribution.Features.Payment;
 
 public interface IPaymentRepository
 {
+    Task<Models.Payment?> GetByIdAsync(Guid id);
+    Task<List<Models.Payment>> GetAllAsync(Guid? storeId, Guid? saleId, int page, int pageSize);
+    Task<int> GetCountAsync(Guid? storeId, Guid? saleId);
     Task<List<Models.Payment>> GetBySaleIdAsync(Guid saleId);
     Task AddAsync(Models.Payment payment);
 }

Distribution/Features/Payment/PaymentDTOs.cs

@@ -4,6 +4,8 @@ namespace Distribution.Features.Payment;
 
 public record CreatePaymentRequest(decimal Amount, PaymentMethod Method);
 
+public record CreateFlatPaymentRequest(Guid SaleId, decimal Amount, PaymentMethod Method);
+
 public record PaymentResponse(
     Guid Id,
     Guid SaleId,

Distribution/Features/Payment/PaymentRepository.cs

@@ -6,6 +6,26 @@ namespace Distribution.Features.Payment;
 
 public class PaymentRepository(AppDBContext context) : IPaymentRepository
 {
+    public async Task<Models.Payment?> GetByIdAsync(Guid id) =>
+        await context.Payments.FirstOrDefaultAsync(p => p.Id == id && p.IsActive);
+
+    public async Task<List<Models.Payment>> GetAllAsync(Guid? storeId, Guid? saleId, int page, int pageSize) =>
+        await context.Payments
+            .Where(p => p.IsActive
+                && (storeId == null || p.FK_StoreId == storeId)
+                && (saleId == null || p.FK_SaleId == saleId))
+            .OrderByDescending(p => p.CollectedAt)
+            .Skip((page - 1) * pageSize)
+            .Take(pageSize)
+            .ToListAsync();
+
+    public async Task<int> GetCountAsync(Guid? storeId, Guid? saleId) =>
+        await context.Payments
+            .Where(p => p.IsActive
+                && (storeId == null || p.FK_StoreId == storeId)
+                && (saleId == null || p.FK_SaleId == saleId))
+            .CountAsync();
+
     public async Task<List<Models.Payment>> GetBySaleIdAsync(Guid saleId) =>
         await context.Payments
             .Where(p => p.FK_SaleId == saleId && p.IsActive)

Distribution/Features/Payment/PaymentService.cs

@@ -1,4 +1,5 @@
 using Distribution.Features.Sale;
+using Distribution.Features.Stock;
 using Distribution.Infra.Authorization;
 using Distribution.Infra.UoW;
 using Distribution.Models;
@@ -14,6 +15,19 @@ public class PaymentService(
     private static PaymentResponse ToResponse(Models.Payment p) =>
         new(p.Id, p.FK_SaleId, p.FK_StoreId, p.Amount, p.Method, p.CollectedAt, p.CollectedBy, p.CreatedAt);
 
+    public async Task<PagedResponse<PaymentResponse>> GetAllAsync(Guid? storeId, Guid? saleId, int page, int pageSize)
+    {
+        var total = await repo.GetCountAsync(storeId, saleId);
+        var items = await repo.GetAllAsync(storeId, saleId, page, pageSize);
+        return new PagedResponse<PaymentResponse>(page, pageSize, total, items.Select(ToResponse).ToList());
+    }
+
+    public async Task<PaymentResponse?> GetByIdAsync(Guid id)
+    {
+        var payment = await repo.GetByIdAsync(id);
+        return payment is null ? null : ToResponse(payment);
+    }
+
     public async Task<List<PaymentResponse>?> GetBySaleIdAsync(Guid saleId)
     {
         var sale = await saleRepo.GetByIdAsync(saleId);