add blacklist settings

lua/autorun/hostile_npcs_tocitizen.lua

@@ -2,6 +2,14 @@ local npcs = list.Get("NPC")
 local citizenEnemy = npcs["npc_citizen_rebel_enemy"]
 local originalListSet = list.Set
 
+local function loadNPCBlacklist()
+    local json = file.Read("npc_blacklist.json", "DATA")
+    print(json)
+    if not json or json == "" then return {} end
+    local data = util.JSONToTable(json)
+    return istable(data) and data or {}
+end
+
 function list.Set(listType, class, npc)
     if listType == "NPC" then
         if npc["Class"] == "npc_combine_s" and npc["Category"] ~= "#spawnmenu.category.combine" then
@@ -16,6 +24,49 @@ function list.Set(listType, class, npc)
     originalListSet(listType, class, npc)
 end
 
+CreateClientConVar("replacehostile_blacklist", "", false, false, "Blacklist NPC Classes")
+
+hook.Add("PopulateToolMenu", "ReplaceHostileMenu", function()
+    local blacklist = loadNPCBlacklist()
+    local defaultBlacklistStr = table.concat(blacklist, ",")
+
+    RunConsoleCommand("replacehostile_blacklist", defaultBlacklistStr)
+
+    spawnmenu.AddToolMenuOption("Options", "Replace Hostile", "ReplaceHostileConfig", "Settings", "", "", function(panel)
+        panel:ClearControls()
+        
+        local blacklistEntry = panel:TextEntry("Blacklist Classes", "replacehostile_blacklist")
+
+        panel:ControlHelp("Separate classes with commas.\nExample: npc_my_custom_hostile,npc_my_hostile,npc_hostile_test")
+
+        blacklistEntry.OnChange = function(self)
+            local val = self:GetValue() or ""
+            local newBlacklist = {}
+
+            for e in string.gmatch(val, '([^,]+)') do
+                local trimmed = string.Trim(e)
+                if trimmed ~= "" then
+                    table.insert(newBlacklist, trimmed)
+                end
+            end
+
+            local valid = true
+            for _, v in ipairs(newBlacklist) do
+                if type(v) ~= "string" or v == "" then
+                    valid = false
+                    break
+                end
+            end
+            
+            if valid then
+                file.Write("npc_blacklist.json", util.TableToJSON(newBlacklist, false))
+            end
+        end
+        
+        panel:Help("NOTE: Restart the map to apply the changes.")
+    end)
+end)
+
 -- Second stage. idk if one of these necessary
 timer.Simple(0, function ()
     for class, npc in pairs(npcs) do