Preserve influences on fetched trade items

spec/System/TestTradeQueryRequests_spec.lua

@@ -194,6 +194,49 @@ Strict-Transport-Security: max-age=63115200; includeSubDomains; preload]]
 	end)
 
 	describe("FetchResultBlock", function()
+		it("preserves item influences in reconstructed item strings", function()
+			local response = dkjson.encode({
+				result = {
+					{
+						id = "influenced",
+						listing = {
+							price = { amount = 1, currency = "chaos", type = "~price" },
+							whisper = "hi",
+							account = { name = "seller" },
+						},
+						item = {
+							rarity = "Rare",
+							name = "Test Subject",
+							typeLine = "Astral Plate",
+							influences = {
+								shaper = true,
+								elder = true,
+								warlord = true,
+								hunter = true,
+								crusader = true,
+								redeemer = true,
+							},
+							searing = true,
+							tangled = true,
+						},
+					},
+				},
+			})
+			local fetchedItems
+			requests.requestQueue.fetch = { }
+			requests:FetchResultBlock("test", function(items)
+				fetchedItems = items
+			end)
+
+			local request = table.remove(requests.requestQueue.fetch, 1)
+			request.callback(response)
+
+			local item = new("Item", fetchedItems[1].item_string)
+			for _, influenceInfo in ipairs(itemLib.influenceInfo.all) do
+				assert.is_true(item[influenceInfo.key], influenceInfo.display)
+			end
+		end)
+
 		it("reads weighted sums from current and legacy pseudo mods", function()
 			local function makeTradeEntry(id, pseudoMods)
 				return {

src/Classes/TradeQueryRequests.lua

@@ -7,6 +7,17 @@
 local dkjson = require "dkjson"
 local utils = LoadModule("Modules/Utils")
 
+local tradeInfluenceApiKeys = {
+	shaper = "shaper",
+	elder = "elder",
+	adjudicator = "warlord",
+	basilisk = "hunter",
+	crusader = "crusader",
+	eyrie = "redeemer",
+	cleansing = "searing",
+	tangle = "tangled",
+}
+
 ---@class TradeQueryRequests
 local TradeQueryRequestsClass = newClass("TradeQueryRequests", function(self, rateLimiter)
 	self.maxFetchPerSearch = 10
@@ -357,6 +368,12 @@ function TradeQueryRequestsClass:FetchResultBlock(url, callback)
 				for _, modLine in ipairs(item.explicitMods) do
 					t_insert(rawLines, processLine(modLine))
 				end
+				for _, influenceInfo in ipairs(itemLib.influenceInfo.all) do
+					local apiKey = tradeInfluenceApiKeys[influenceInfo.key]
+					if apiKey and ((item.influences and item.influences[apiKey]) or item[apiKey]) then
+						t_insert(rawLines, influenceInfo.display .. " Item")
+					end
+				end
 				if item.duplicated then
 					t_insert(rawLines, "Mirrored")
 				end