Wired up transit whitelist system for use in Khorvod event

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

@@ -9930,7 +9930,8 @@
         "adjustBotAppearances": true,
         "enableChristmasHideout": true,
         "enableSanta": true,
-        "enableRundansEvent": true
+        "enableRundansEvent": true,
+        "enableKhorvodEvent": true
       },
       "startDay": "13",
       "startMonth": "12",
@@ -9944,6 +9945,7 @@
       "settings": {
         "adjustBotAppearances": true,
         "enableChristmasHideout": true,
+        "enableKhorvodEvent": true,
         "enableSanta": true
       },
       "startDay": "1",
@@ -13997,5 +13999,8 @@
         }
       ]
     }
+  },
+  "khorvodEventTransitWhitelist": {
+	  "bigmap": [9]
   }
 }

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

@@ -47,6 +47,9 @@ public record SeasonalEventConfig : BaseConfig
     [JsonPropertyName("hostilitySettingsForEvent")]
     public required Dictionary<string, Dictionary<string, List<AdditionalHostilitySettings>>> HostilitySettingsForEvent { get; set; }
 
+    [JsonPropertyName("khorvodEventTransitWhitelist")]
+    public required Dictionary<string, List<int>> KhorvodEventTransitWhitelist { get; set; }
+
     /// <summary>
     ///     Ids of containers on locations that only have Christmas loot
     /// </summary>
@@ -143,6 +146,9 @@ public record SeasonalEventSettings
 
     [JsonPropertyName("enableRundansEvent")]
     public bool? EnableRundansEvent { get; set; }
+
+    [JsonPropertyName("enableKhorvodEvent")]
+    public bool? EnableKhorvodEvent { get; set; }
 }
 
 public record ZombieSettings

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

@@ -519,9 +519,35 @@ public class SeasonalEventService(
             EnableRunnansEvent(databaseService.GetGlobals());
         }
 
+        if (eventType.Settings?.EnableKhorvodEvent ?? false)
+        {
+            AdjustTransitsToKhorvodEvent();
+        }
+
         ChangeBtrToTarColaSkin();
     }
 
+    protected void AdjustTransitsToKhorvodEvent()
+    {
+        var locations = databaseService.GetLocations().GetDictionary();
+
+        foreach (var (locationName, locationBase) in locations)
+        {
+            if (LocationConfig.NonMaps.Contains(locationName))
+            {
+                continue;
+            }
+
+            var matchingTransitWhitelist = SeasonalEventConfig.KhorvodEventTransitWhitelist.GetValueOrDefault(locationBase.Base.Id, null);
+            if (matchingTransitWhitelist is null )
+            {
+                continue;
+            }
+
+            locationBase.Base.Transits = locationBase.Base.Transits.Where(t => matchingTransitWhitelist.Contains(t.Id.Value)).ToList();
+        }
+    }
+
     protected void EnableRunnansEvent(Globals globals)
     {
         globals.Configuration.RunddansSettings.Active = true;