feat: synergy notes for owned items (RU, prebuilt from dead-god.ru)

eid_config.lua

@@ -324,6 +324,11 @@ EID.UserConfig = {
 	-- Default = true
 	["DisplayFlipItemDescriptions"] = true,
 
+	---------- Synergy Notes (personal fork) ----------
+	-- If enabled, displays synergy notes for owned items under the description (Russian language only)
+	-- Default = true
+	["DisplaySynergies"] = true,
+
 	---------- Item Reminder Description ------------
 	-- Enable/Disable item reminder feature.
 	-- Hold Map (or the button action chosen below) to show a description of your active item's effect, recently picked up items, and things like Teleport 2.0's destination and Void's absorbed items
@@ -625,6 +630,7 @@ EID.DefaultConfig = {
 	["DisplayCraneInfo"] = true,
 	["DisplayVoidStatInfo"] = false,
 	["DisplayFlipItemDescriptions"] = true,
+	["DisplaySynergies"] = true,
 	["BagOfCraftingResults"] = 7,
 	["BagOfCraftingCombinationMax"] = 12,
 	["BagOfCraftingRandomResults"] = 400,

features/eid_mcm.lua

@@ -175,6 +175,7 @@ EID.MCM_RU_Labels = {
 	["Show Glitched Item Info"] = "Инфо о глитч-артефактах",
 	["Show Glitched Crown Summary"] = "Сводка Глитч-короны",
 	["Show Sacrifice Room Info"] = "Инфо о комнате жертвоприношений",
+	["Show Synergies"] = "Показывать синергии",
 	["Show Sanguine Bond Info"] = "Инфо о Кровавых узах",
 	["Show Void Stat Increases"] = "Прирост статов от Бездны",
 	["Show Tainted Cain Salvage Results"] = "Результаты разбора Порченого Каина",
@@ -568,6 +569,8 @@ if MCMLoaded then
 	infoText = "Note: Installing REPENTOGON is required for more detailed glitched item descriptions!"})
 	EID:AddBooleanSetting("Display", "DisplayFlipItemDescriptions", "Show Flip Item Descriptions", {repOnly = true, 
 	infoText = "Display the effect of ghostly items, when player has the Flip item (T-Lazarus)"})
+	EID:AddBooleanSetting("Display", "DisplaySynergies", "Show Synergies",
+		{infoText = "Display synergy notes for owned items under the description (Russian language only)."})
 
 	MCM.AddSpace("EID", EID.MCMTr("Display"))
 	MCM.AddText("EID", EID.MCMTr("Display"), "Hidden items")

features/eid_synergies.lua

@@ -0,0 +1,68 @@
+-- Personal fork: synergy notes for owned items (Russian).
+-- Data comes prebuilt from dead_god_items.json, see
+-- EID-localization-audit/build_synergy_table.py and features/eid_synergy_data.lua.
+-- When the player owns item A and looks at item B that synergizes with A,
+-- the relevant note is appended to B's description.
+
+local MAX_SYNERGY_LINES = 3
+
+local function synergyTableFor(desc)
+	if EID.SynergyDataRU == nil then return nil end
+	if desc.ObjType ~= EntityType.ENTITY_PICKUP then return nil end
+	if desc.ObjVariant == PickupVariant.PICKUP_COLLECTIBLE then
+		return EID.SynergyDataRU.coll[desc.ObjSubType]
+	elseif desc.ObjVariant == PickupVariant.PICKUP_TRINKET then
+		return EID.SynergyDataRU.trink[desc.ObjSubType]
+	end
+	return nil
+end
+
+local function anyPartnerOwned(entry)
+	for _, partner in ipairs(entry.partners) do
+		if EID:PlayersHaveCollectible(partner) then
+			return true
+		end
+	end
+	return false
+end
+
+local function synergyCondition(desc)
+	if EID:getLanguage() ~= "ru" then return false end
+	if EID.Config["DisplaySynergies"] == false then return false end
+	local list = synergyTableFor(desc)
+	if not list then return false end
+	for _, entry in ipairs(list) do
+		if anyPartnerOwned(entry) then
+			return true
+		end
+	end
+	return false
+end
+
+local function synergyCallback(desc)
+	local list = synergyTableFor(desc)
+	if not list then return desc end
+	-- collect (partner, text) pairs for owned partners only
+	local lines = {}
+	for _, entry in ipairs(list) do
+		for _, partner in ipairs(entry.partners) do
+			if EID:PlayersHaveCollectible(partner) then
+				lines[#lines + 1] = { partner = partner, text = entry.text }
+				break
+			end
+		end
+	end
+	if #lines == 0 then return desc end
+	desc.Description = desc.Description .. "{{CR}}#Синергии:"
+	for i = 1, math.min(#lines, MAX_SYNERGY_LINES) do
+		-- NOTE: {{CollectibleID}} already renders the item's icon AND its name,
+		-- so no explicit name is added here
+		desc.Description = desc.Description .. "#{{Collectible" .. lines[i].partner .. "}}: " .. lines[i].text
+	end
+	if #lines > MAX_SYNERGY_LINES then
+		desc.Description = desc.Description .. "#…и ещё синергий: " .. (#lines - MAX_SYNERGY_LINES)
+	end
+	return desc
+end
+
+EID:addDescriptionModifier("EID Personal Synergy Notes", synergyCondition, synergyCallback)

main.lua

@@ -126,6 +126,8 @@ else
 end
 require("features.eid_conditionals")
 require("features.eid_modifiers")
+require("features.eid_synergy_data")
+require("features.eid_synergies")
 require("features.eid_holdmapdesc")
 require("features.eid_itemprediction")