help Trying to make mod work on server with caves enabled.

[NamelessDude77]

Hello everyone, I think I'll need some expert help here!

I'm making a mod that will let you pick which variant of flower or fern or succulent you want to plant, everything works fine on a server without caves. 

Basically you press a button to open a menu, click on an icon, close and plant your desired variant. However when running on a caves server, some information from the menu functions can't be sent to the server, I suppose. Actually I only need some strings from the buttons functions to be saved outside the menu function but it fails because the menu seems to be ran on client side. I tried using RPC but I don't quite understand how to use it properly.

modmain:

Assets = {

	Asset("IMAGE", "images/tabs.tex"),
	Asset("ATLAS", "images/tabs.xml"),
	Asset("IMAGE", "images/flowers.tex"),
	Asset("ATLAS", "images/flowers.xml"),
	Asset("IMAGE", "images/ferns.tex"),
	Asset("ATLAS", "images/ferns.xml"),
	Asset("IMAGE", "images/succulents.tex"),
	Asset("ATLAS", "images/succulents.xml")

}

local require = GLOBAL.require

local MenuScreen = require "screens/menuscreen"

local Names = {

	["tab"]		= "Flowers",
	["fern"]		= "random",
	["flower"]		= "random",
	["succulent"]	= "random",

}

AddPrefabPostInit("pottedfern", function(inst)
	local name = Names.fern
	local function SetFernType(inst, name)
		inst.animname = name
       		inst.AnimState:PlayAnimation(inst.animname)
   	end
   	if name ~= "random" then
   		SetFernType(inst, name)
   	end
end)

AddPrefabPostInit("planted_flower", function(inst)
	local name = Names.flower
	local names = {"f1","f2","f3","f4","f5","f6","f7","f8","f9","f10"}
	local ROSE_CHANCE = GetModConfigData("Rose_Chance")
	local function SetFlowerType(inst, name)
        inst.animname = name
        inst.AnimState:PlayAnimation(inst.animname)
	end
	if name ~= "random" then
		SetFlowerType(inst, name)
	else
		SetFlowerType(inst, math.random() < ROSE_CHANCE and "rose" or names[math.random(#names)])
	end
end)

AddPrefabPostInit("succulent_potted", function(inst)
	local name = Names.succulent:gsub("s", "")
	local number = GLOBAL.tonumber(name)
	local function SetSucculentType(inst, number)
		inst.plantid = number
	end
	if name ~= "random" then
		SetSucculentType(inst, number)
	end
end)

Toggle_Key = GetModConfigData("Toggle_Key")

local function GetActiveScreenName()
	local screen = GLOBAL.TheFrontEnd:GetActiveScreen()
	return screen and screen.name or ""
end
local function IsDefaultScreen()
	return GetActiveScreenName():find("HUD") ~= nil
end
local function IsScoreboardScreen()
	return GetActiveScreenName():find("PlayerStatusScreen") ~= nil
end

local ignore_key = false

local function set_ignore()
	ignore_key = true
end

local function PushOptionsScreen()

	local screen = MenuScreen()
	
	screen.togglekey = Toggle_Key
	
	screen.callbacks.tab = function(name)
		Names.tab = name
	end

	for name, button in pairs(screen.tab_buttons) do
		if name == Names.tab then
			button:Select()
			button.image:SetTint(.8, 1, .4, 1)
			screen:SetTab(name)
		else
			button:Unselect()
		end
	end

	screen.callbacks.fern = function(name)
		Names.fern = name	-- This is what I need
	end

	for name, button in pairs(screen.fern_buttons) do
		if name == Names.fern then
			button:Select()
			button.image:SetTint(1, .8, .4, 1)
		else
			button:Unselect()
		end
	end

	screen.callbacks.flower = function(name)
		Names.flower = name	-- This is what I need
	end

	for name, button in pairs(screen.flower_buttons) do
		if name == Names.flower then
			button:Select()
			button.image:SetTint(1, .8, .4, 1)
		else
			button:Unselect()
		end
	end

	screen.callbacks.succulent = function(name)
		Names.succulent = name	-- This is what I need
	end

	for name, button in pairs(screen.succulent_buttons) do
		if name == Names.succulent then
			button:Select()
			button.image:SetTint(1, .8, .4, 1)
		else
			button:Unselect()
		end
	end

	screen.callbacks.ignore = set_ignore
	GLOBAL.TheFrontEnd:PushScreen(screen)

end

GLOBAL.TheInput:AddKeyUpHandler(Toggle_Key,
	function()
		if IsDefaultScreen() then
			if ignore_key then
				ignore_key = false
			else
				PushOptionsScreen()				
			end
		end
	end)

I used some code from the geometric placement mod from rezecib to make the ui, in modmain, only the callbacks stuff.

Also, would it work on all clients separetely? I fear I'll have to keep this as a server admin mod only