mods that hopefully work for a TechAge-based pack

mods/techage_modpack/techage/icta_controller/condition.lua

@@ -0,0 +1,84 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2019-2020 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+	ICTA Controller - Condition Registration
+
+]]--
+
+ -- for lazy programmers
+local M = minetest.get_meta
+local S = techage.S
+local logic = techage.logic
+
+-- tables with all data from condition registrations
+local kvRegisteredCond = {}
+
+-- list of keys for conditions
+local aCondTypes = {}
+
+-- list of titles for conditions
+local aCondTitles = {}
+
+--
+-- API functions for condition registrations
+--
+function techage.icta_register_condition(key, tData)
+	table.insert(aCondTypes, key)
+	table.insert(aCondTitles, tData.title)
+	if kvRegisteredCond[key] ~= nil then
+		print("[Techage] Condition registration error "..key)
+		return
+	end
+	kvRegisteredCond[key] = tData
+	for _,item in ipairs(tData.formspec) do
+		if item.type == "textlist" then
+			item.tChoices = string.split(item.choices, ",")
+			item.num_choices = #item.tChoices
+		end
+	end
+end
+
+-- return formspec string
+function techage.cond_formspec(row, kvSelect)
+	return techage.submenu_generate_formspec(
+		row, "cond", "Condition type", aCondTypes, aCondTitles, kvRegisteredCond, kvSelect)
+end
+
+-- evaluate the row condition input
+-- and return new data
+function techage.cond_eval_input(kvSelect, fields)
+	kvSelect = techage.submenu_eval_input(kvRegisteredCond, aCondTypes, aCondTitles, kvSelect, fields)
+	return kvSelect
+end
+
+-- return the Lua code
+function techage.code_condition(kvSelect, environ)
+	if kvSelect and kvRegisteredCond[kvSelect.choice] then
+		if techage.submenu_verify(environ.owner, kvRegisteredCond, kvSelect) then
+			return kvRegisteredCond[kvSelect.choice].code(kvSelect, environ)
+		end
+	end
+	return nil, nil
+end
+
+techage.icta_register_condition("default", {
+	title = "",
+	formspec = {},
+	code = function(data, environ)
+		local condition = function(env, idx)
+			return false
+		end
+		local result = function(val)
+			return false
+		end
+		return condition, result
+	end,
+	button = function(data, environ) return "..." end,
+})