Add pricing and supplier master data

Distribution/Features/Supplier/SupplierService.cs

@@ -0,0 +1,61 @@
+using Distribution.Infra.UoW;
+
+namespace Distribution.Features.Supplier;
+
+public class SupplierService(ISupplierRepository repo, IUnitOfWork uow)
+{
+    private static SupplierResponse Map(Models.Supplier s) =>
+        new(s.Id, s.Name, s.ContactInfo, s.PerformanceScore, s.IsActive, s.CreatedAt);
+
+    public async Task<List<SupplierResponse>> GetAllAsync() =>
+        (await repo.GetAllAsync()).Select(Map).ToList();
+
+    public async Task<SupplierResponse?> GetByIdAsync(Guid id)
+    {
+        var supplier = await repo.GetByIdAsync(id);
+        if (supplier is null || !supplier.IsActive) return null;
+        return Map(supplier);
+    }
+
+    public async Task<SupplierResponse> CreateAsync(CreateSupplierRequest request, CancellationToken ct = default)
+    {
+        var supplier = new Models.Supplier
+        {
+            Name = request.Name,
+            ContactInfo = request.ContactInfo
+        };
+
+        await uow.BeginAsync(ct);
+        try { await repo.AddAsync(supplier); await uow.CommitAsync(ct); }
+        catch { await uow.RollbackAsync(ct); throw; }
+
+        return Map(supplier);
+    }
+
+    public async Task<SupplierResponse?> UpdateAsync(Guid id, UpdateSupplierRequest request, CancellationToken ct = default)
+    {
+        var supplier = await repo.GetByIdAsync(id);
+        if (supplier is null || !supplier.IsActive) return null;
+
+        supplier.Name = request.Name;
+        supplier.ContactInfo = request.ContactInfo;
+
+        await uow.BeginAsync(ct);
+        try { repo.Update(supplier); await uow.CommitAsync(ct); }
+        catch { await uow.RollbackAsync(ct); throw; }
+
+        return Map(supplier);
+    }
+
+    public async Task<bool> DeleteAsync(Guid id, CancellationToken ct = default)
+    {
+        var supplier = await repo.GetByIdAsync(id);
+        if (supplier is null || !supplier.IsActive) return false;
+
+        await uow.BeginAsync(ct);
+        try { repo.Remove(supplier); await uow.CommitAsync(ct); }
+        catch { await uow.RollbackAsync(ct); throw; }
+
+        return true;
+    }
+}