From 1ef9ebd88a1763f711cdcfa3976751fe1be1f0d1 Mon Sep 17 00:00:00 2001
From: Chomp <dev@dev.sp-tarkov.com>
Date: Tue, 16 Sep 2025 22:24:35 +0100
Subject: [PATCH] Added system to generate item flea base prices based on
 handbook value

---
 .../SPT_Data/configs/ragfair.json             | 11 ++++-
 .../Models/Spt/Config/RagfairConfig.cs        | 27 ++++++++++++
 .../Services/RagfairPriceService.cs           | 42 +++++++++++++++++--
 3 files changed, 75 insertions(+), 5 deletions(-)

diff --git a/Libraries/SPTarkov.Server.Assets/SPT_Data/configs/ragfair.json b/Libraries/SPTarkov.Server.Assets/SPT_Data/configs/ragfair.json
index faac4d8f..ba148b52 100644
--- a/Libraries/SPTarkov.Server.Assets/SPT_Data/configs/ragfair.json
+++ b/Libraries/SPTarkov.Server.Assets/SPT_Data/configs/ragfair.json
@@ -343,7 +343,16 @@
         "newPriceHandbookMultiplier": 11
       }
     },
-    "useTraderPriceForOffersIfHigher": true
+    "useTraderPriceForOffersIfHigher": true,
+	"generateBaseFleaPrices": {
+		"useHandbookPrice": true,
+		"priceMultiplier": 1.5,
+		"itemTplMultiplierOverride": {
+			"5780cf7f2459777de4559322": 1.8,
+			"5c1d0efb86f7744baf2e7b7b": 2.5
+		},
+		"preventPriceBeingBelowTraderBuyPrice": true
+	}
   },
   "runIntervalSeconds": 8,
   "runIntervalValues": {
diff --git a/Libraries/SPTarkov.Server.Core/Models/Spt/Config/RagfairConfig.cs b/Libraries/SPTarkov.Server.Core/Models/Spt/Config/RagfairConfig.cs
index d454dde0..ce2190bb 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Spt/Config/RagfairConfig.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Spt/Config/RagfairConfig.cs
@@ -227,6 +227,33 @@ public record Dynamic
     /// </summary>
     [JsonPropertyName("itemPriceOverrideRouble")]
     public required Dictionary<MongoId, double> ItemPriceOverrideRouble { get; set; }
+
+    [JsonPropertyName("generateBaseFleaPrices")]
+    public GenerateFleaPrices GenerateBaseFleaPrices { get; set; }
+}
+
+public record GenerateFleaPrices
+{
+    /// <summary>
+    /// Should handbook prices be used (true) as a base or the values already in prices.json (false)
+    /// </summary>
+    [JsonPropertyName("useHandbookPrice")]
+    public bool UseHandbookPrice { get; set; }
+
+    /// <summary>
+    /// Multiplier to apply to handbook price
+    /// </summary>
+    [JsonPropertyName("priceMultiplier")]
+    public double PriceMultiplier { get; set; }
+
+    /// <summary>
+    /// Don't allow prices being added that are below sell to trader price. Prevent ability to buy cheap items on flea and sell to traders for easy rep
+    /// </summary>
+    [JsonPropertyName("preventPriceBeingBelowTraderBuyPrice")]
+    public bool PreventPriceBeingBelowTraderBuyPrice { get; set; }
+
+    [JsonPropertyName("itemTplMultiplierOverride")]
+    public Dictionary<MongoId, double> ItemTplMultiplierOverride { get; set; }
 }
 
 public record PriceRanges
diff --git a/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs b/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs
index 9fa16001..5f4e9506 100644
--- a/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs
+++ b/Libraries/SPTarkov.Server.Core/Services/RagfairPriceService.cs
@@ -1,4 +1,5 @@
 using SPTarkov.DI.Annotations;
+using SPTarkov.Server.Core.Extensions;
 using SPTarkov.Server.Core.Helpers;
 using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common;
@@ -24,6 +25,7 @@ public class RagfairPriceService(
     PresetHelper presetHelper,
     ItemHelper itemHelper,
     DatabaseService databaseService,
+    DatabaseServer databaseServer,
     ServerLocalisationService serverLocalisationService,
     ConfigServer configServer
 )
@@ -37,7 +39,10 @@ public class RagfairPriceService(
     public void Load()
     {
         RefreshStaticPrices();
-        RefreshDynamicPrices();
+        if (RagfairConfig.Dynamic.GenerateBaseFleaPrices.UseHandbookPrice)
+        {
+            ReplaceFleaBasePrices();
+        }
     }
 
     public string GetRoute()
@@ -62,11 +67,40 @@ public class RagfairPriceService(
     }
 
     /// <summary>
-    ///     Copy the prices.json data into our dynamic price dictionary
+    /// Replace base item price used for flea
+    /// Use handbook as a base price
     /// </summary>
-    public void RefreshDynamicPrices()
+    public void ReplaceFleaBasePrices()
     {
-        // TODO: remove as redundant?
+        var pricePool = databaseServer.GetTables().Templates.Prices;
+        foreach (var (itemTpl, handbookPrice) in StaticPrices)
+        {
+            // Get new price to use
+            var newBasePrice = handbookPrice * RagfairConfig.Dynamic.GenerateBaseFleaPrices.PriceMultiplier;
+            if (newBasePrice == 0)
+            {
+                continue;
+            }
+
+            // Specific item multiplier may exist, check for it
+            if (RagfairConfig.Dynamic.GenerateBaseFleaPrices.ItemTplMultiplierOverride.TryGetValue(itemTpl, out var specificItemMultiplier))
+            {
+                newBasePrice = handbookPrice * specificItemMultiplier;
+            }
+
+            if (RagfairConfig.Dynamic.GenerateBaseFleaPrices.PreventPriceBeingBelowTraderBuyPrice)
+            {
+                // Check if item can be sold to trader for a higher price than what we're going to set
+                var highestSellToTraderPrice = traderHelper.GetHighestSellToTraderPrice(itemTpl);
+                if (highestSellToTraderPrice > newBasePrice)
+                {
+                    // Trader has higher sell price, use that value
+                    newBasePrice = highestSellToTraderPrice;
+                }
+            }
+
+            pricePool.AddOrUpdate(itemTpl, newBasePrice);
+        }
     }
 
     /// <summary>