local function constructionHandler (fileName, data)
	local fn = data.updateFn
	
	data.updateFn = function(params)
		result = fn(params)
		if data.type == "TOWN_BUILDING" and (data.townBuildingParams.landUseType == "RESIDENTIAL") then
			local ruleCapacity = math.floor(params.capacity / 4 + 0.5)
			if (ruleCapacity > 0) then
				result.stocks = {}
				result.stockRules = {}

				local cargoTypes = {"MAIL"}
				local inputs = { { { 1, } }, }
				for i = 1, 1 do
					result.stocks[i] = {
						cargoType = cargoTypes[i],
						type = "RECEIVING",
						edges = { },
						moreCapacity = ruleCapacity
					}
					result.stockRules[i] = {
						input = inputs[i],
						output = { { 0, } },
						capacity = ruleCapacity
					}
				end
			end
		end

		result.cost = 1000
		result.bulldozeCost = 100

		return result
	end

	return data
end

function data()
return {
	info = {
	minorVersion = 1,
	severityAdd = "WARNING",
	severityRemove = "CRITICAL",
	name = _("TPF-Addon-Industrie_-_PostMod"),
	description = _("desc_mod"),
	tags = { "Industry", "Mail", "Script Mod", "Cargo" },
	authors = {
		{
			name = "nown",
			role = "CREATOR",
			text = "",
			steamProfile = "",
			tfnetId = ""
		},

	},

	visible = true

},

runFn = function (settings)

	addModifier( "loadConstruction", constructionHandler )

	table.insert(game.config.cargotypes, { id = "MAIL",					name = _("mail"),					weight = 600 } )
	table.insert(game.config.cargotypes, { id = "UNSORTED_MAIL",		name = _("unsorted_mail"),			weight = 600 } )

	game.config.industryButton = true

end
}
end