Add support for flea market dogtag barter requirements (!378)

Trader offers with dogtag barter requirements are currently missing the `level` and `side` properties necessary to qualify them. This data already exists in the assorts, just needed to be sent along with the offer.

I considered updating the `side` property of `Requirement` in `IAddOfferRequestData.ts`, but that field is never used, and the client appears to pass 0 for both (even though 0 is not a valid `side`).

Not sure if this should be going to `master` or `310-dev`?

Reviewed-on: https://dev.sp-tarkov.com/SPT/Server/pulls/378
Co-authored-by: Tyfon <tyfon7@outlook.com>
Co-committed-by: Tyfon <tyfon7@outlook.com>

project/src/generators/RagfairOfferGenerator.ts

@@ -115,11 +115,23 @@ export class RagfairOfferGenerator
     {
         const isTrader = this.ragfairServerHelper.isTrader(userID);
 
-        const offerRequirements = barterScheme.map((barter) => ({
-            _tpl: barter._tpl,
-            count: +barter.count.toFixed(2),
-            onlyFunctional: barter.onlyFunctional ?? false,
-        } as OfferRequirement));
+        const offerRequirements = barterScheme.map((barter) =>
+        {
+            const offerRequirement: OfferRequirement = {
+                _tpl: barter._tpl,
+                count: +barter.count.toFixed(2),
+                onlyFunctional: barter.onlyFunctional ?? false,
+            };
+
+            // Dogtags define level and side
+            if (barter.level !== undefined)
+            {
+                offerRequirement.level = barter.level;
+                offerRequirement.side = barter.side;
+            }
+
+            return offerRequirement;
+        });
 
         // Clone to avoid modifying original array
         const itemsClone = this.cloner.clone(items);

project/src/models/eft/common/tables/ITrader.ts

@@ -1,5 +1,6 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { Item } from "@spt/models/eft/common/tables/IItem";
+import { DogtagExchangeSide } from "@spt/models/enums/DogtagExchangeSide";
 import { ITraderServiceModel } from "@spt/models/spt/services/ITraderServiceModel";
 
 export interface ITrader
@@ -95,6 +96,8 @@ export interface IBarterScheme
     _tpl: string
     onlyFunctional?: boolean
     sptQuestLocked?: boolean
+    level?: number
+    side?: DogtagExchangeSide
 }
 
 export interface ISuit

project/src/models/eft/ragfair/IRagfairOffer.ts

@@ -1,4 +1,5 @@
 import { Item } from "@spt/models/eft/common/tables/IItem";
+import { DogtagExchangeSide } from "@spt/models/enums/DogtagExchangeSide";
 import { MemberCategory } from "@spt/models/enums/MemberCategory";
 
 export interface IRagfairOffer
@@ -33,6 +34,8 @@ export interface OfferRequirement
     _tpl: string
     count: number
     onlyFunctional: boolean
+    level?: number
+    side?: DogtagExchangeSide
 }
 
 export interface IRagfairOfferUser

project/src/models/enums/DogtagExchangeSide.ts

@@ -0,0 +1,6 @@
+export enum DogtagExchangeSide
+{
+    USEC = "Usec",
+    BEAR = "Bear",
+    ANY = "Any",
+}