add gs

RCCService2018/content/internal/AppShell/Modules/Shell/Reducers/ErrorHandler.lua

@@ -0,0 +1,26 @@
+local Modules = game:GetService("CoreGui").RobloxGui.Modules
+local OrderedMap = require(Modules.Shell.OrderedMap)
+local DeleteError = require(Modules.Shell.Actions.DeleteError)
+
+local function getErrorCode(error)
+	return error.Code
+end
+
+local function errorSortPredicate(error1, error2)
+	return error1.timestamp < error2.timestamp
+end
+
+return function(state, action)
+	state = state or OrderedMap.new(getErrorCode, errorSortPredicate)
+
+	--OrderedMap.Delete and OrderedMap.Insert are immutable operations and a new table is returned.
+	if action.error and type(getErrorCode(action.error)) == "number" then
+		if action.type == DeleteError.name then
+			state = OrderedMap.Delete(state, getErrorCode(action.error))
+		else
+			state = OrderedMap.Insert(state, action.error)
+		end
+	end
+
+	return state
+end