feat: implement Kavenegar SMS service and refactor system configurations to use static constants

src/CMSMicroservice.Application/UserOrderCQ/Commands/SubmitShopBuyOrder/SubmitShopBuyOrderCommandHandler.cs

@@ -1,3 +1,4 @@
+using CMSMicroservice.Domain.Common;
 using CMSMicroservice.Domain.Enums;
 using CMSMicroservice.Domain.Events;
 using CMSMicroservice.Domain.Entities.Order;
@@ -63,16 +64,11 @@ public class
         }
 
         long finalAmount = 0;
-        var vatIsEnable =
-            _context.SystemConfigurations
-                           .FirstOrDefault(f => f.Scope == ConfigurationScope.VAT && f.Key == "IsEnabled")?.Value ??
-                       "0";
-        if (vatIsEnable=="1")
+        
+        // استفاده از SystemConstants برای VAT
+        if (SystemConstants.ShopVATEnabled)
         {
-            _vatRate = float.Parse(
-                _context.SystemConfigurations
-                    .FirstOrDefault(f => f.Scope == ConfigurationScope.VAT && f.Key == "Shop.VAT")?.Value ??
-                throw new InvalidOperationException());
+            _vatRate = (float)SystemConstants.ShopVAT;
             finalAmount = AddVAT(user.UserCarts.Sum(s => s.Count * s.Product.Price));
             _logger.LogInformation(
                 "Calculating final amount with VAT. Base Amount: {BaseAmount}, VAT Rate: {VATRate}, Final Amount: {FinalAmount}",
@@ -147,7 +143,7 @@ public class
         {
             ProductId = s.ProductId,
             Count = s.Count,
-            UnitPrice =vatIsEnable=="1" ?AddVAT(s.Product.Price): s.Product.Price,
+            UnitPrice = SystemConstants.ShopVATEnabled ? AddVAT(s.Product.Price) : s.Product.Price,
             OrderId = newOrder.Id
         });
         await _context.FactorDetails.AddRangeAsync(factorDetailsList, cancellationToken);
@@ -183,25 +179,15 @@ public class
     {
         try
         {
-            // بررسی فعال بودن VAT
-            var vatEnabledConfig = await _context.SystemConfigurations
-                .FirstOrDefaultAsync(x => x.Scope == ConfigurationScope.VAT && x.Key == "IsEnabled", cancellationToken);
-
-            if (vatEnabledConfig == null || !bool.TryParse(vatEnabledConfig.Value, out var isEnabled) || !isEnabled)
+            // بررسی فعال بودن VAT از SystemConstants
+            if (!SystemConstants.ShopVATEnabled)
             {
                 _logger.LogInformation("VAT is disabled. Skipping VAT calculation for order {OrderId}", orderId);
                 return false;
             }
 
-            // دریافت نرخ VAT
-            var vatRateConfig = await _context.SystemConfigurations
-                .FirstOrDefaultAsync(x => x.Scope == ConfigurationScope.VAT && x.Key == "Shop.VAT", cancellationToken);
-
-            if (vatRateConfig == null || !decimal.TryParse(vatRateConfig.Value, out var vatRate))
-            {
-                _logger.LogWarning("VAT Rate configuration not found or invalid. Using default 0.09");
-                vatRate = 0.09m;
-            }
+            // دریافت نرخ VAT از SystemConstants
+            var vatRate = SystemConstants.ShopVAT;
 
             // محاسبه مالیات
             var vatAmount = (long)(orderAmount * vatRate);