Generate weapon/armor price based on the child item price total

Libraries/SPTarkov.Server.Assets/SPT_Data/configs/ragfair.json

@@ -346,6 +346,7 @@
     "useTraderPriceForOffersIfHigher": true,
     "generateBaseFleaPrices": {
       "useHandbookPrice": true,
+      "generatePresetPriceByChildren": true,
       "priceMultiplier": 1.5,
       "itemTplMultiplierOverride": {
         "5780cf7f2459777de4559322": 1.8

Libraries/SPTarkov.Server.Core/Generators/RagfairOfferGenerator.cs

@@ -473,7 +473,7 @@ public class RagfairOfferGenerator(
             // Not barter or pack offer
             // Apply randomised properties
             RandomiseOfferItemUpdProperties(sellerId, itemWithChildren, itemToSellDetails, offerCreator);
-            barterScheme = CreateCurrencyBarterScheme(itemWithChildren, isPackOffer);
+            barterScheme = CreateCurrencyBarterScheme(itemWithChildren, false);
         }
 
         var createOfferDetails = new CreateFleaOfferDetails
@@ -487,6 +487,7 @@ public class RagfairOfferGenerator(
             Creator = offerCreator,
             SellInOnePiece = isPackOffer, // sellAsOnePiece - pack offer
         };
+
         CreateAndAddFleaOffer(createOfferDetails);
     }
 

Libraries/SPTarkov.Server.Core/Models/Spt/Config/RagfairConfig.cs

@@ -269,6 +269,12 @@ public record GenerateFleaPrices
 
     [JsonPropertyName("hideoutCraftMultiplier")]
     public double HideoutCraftMultiplier { get; set; }
+
+    /// <summary>
+    /// Should weapons/armors have their price generated by totalling its child items
+    /// </summary>
+    [JsonPropertyName("generatePresetPriceByChildren")]
+    public bool GeneratePresetPriceByChildren { get; set; }
 }
 
 public record PriceRanges

Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs

@@ -272,7 +272,7 @@ public class RagfairPriceService(
                 continue;
             }
 
-            price += GetDynamicItemPrice(item.Template, desiredCurrency, item, offerItems, isPackOffer).Value;
+            price += GetDynamicItemPrice(item.Template, desiredCurrency, item, offerItems, isPackOffer) ?? 0;
 
             // Check if the item is a weapon preset.
             if (item?.Upd?.SptPresetId is not null && presetHelper.IsPresetBaseClass(item.Upd.SptPresetId.Value, BaseClasses.WEAPON))
@@ -329,7 +329,11 @@ public class RagfairPriceService(
             && presetHelper.IsPresetBaseClass(item.Upd.SptPresetId.Value, BaseClasses.WEAPON)
         )
         {
-            price = GetWeaponPresetPrice(item, offerItems, price);
+            price =
+                RagfairConfig.Dynamic.GenerateBaseFleaPrices.UseHandbookPrice
+                && RagfairConfig.Dynamic.GenerateBaseFleaPrices.GeneratePresetPriceByChildren
+                    ? GetPresetPriceByChildren(offerItems)
+                    : GetWeaponPresetPrice(item, offerItems, price);
             isPreset = true;
         }
 
@@ -522,6 +526,28 @@ public class RagfairPriceService(
         return existingPrice + extraModsPrice;
     }
 
+    /// <summary>
+    ///     Calculate the cost of a weapon preset by adding together the price of its mods
+    /// </summary>
+    /// <param name="weaponWithChildren">weapon plus mods</param>
+    /// <returns>price of weapon in roubles</returns>
+    protected double GetPresetPriceByChildren(IEnumerable<Item> weaponWithChildren)
+    {
+        var priceTotal = 0d;
+        foreach (var item in weaponWithChildren)
+        {
+            // Root item uses static price
+            if (item.ParentId == null)
+            {
+                priceTotal += GetStaticPriceForItem(item.Template) ?? 0;
+            }
+
+            priceTotal += GetFleaPriceForItem(item.Template);
+        }
+
+        return priceTotal;
+    }
+
     /// <summary>
     ///     Get the highest price for an item that is stored in handbook or trader assorts
     /// </summary>