fix crash and add mcl2 support

init.lua

@@ -3,6 +3,8 @@ minetest.log("action", "[mesecons_onlinedetector] loading...")
 local S = minetest.get_translator(minetest.get_current_modname())
 local F = minetest.formspec_escape
 
+local has_mcl_core = minetest.get_modpath("mcl_core")
+
 local table = table
 
 local function get_detector_form(default)
@@ -38,56 +40,74 @@ local function update_detector_off(pos, target)
 	end
 end
 
-minetest.register_node("mesecons_onlinedetector:online_detector_off", {
+local nodedef = {
 	description = S("Online Detector"),
 	_doc_items_longdesc = S("Allows you to know if a player is connected."),
-	tiles = {"mesecons_onlinedetector_online_detector_off.png"},
-	groups = {cracky = 2, mesecon_detector_off = 1, mesecon = 2},
-	mesecons = {
-		receptor = {
-			state = mesecon.state.off,
-			rules = mesecon.rules.alldirs,
-		},
-	},
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)
 		meta:set_string("formspec", get_detector_form(meta:get_string("name")))
 	end,
-	on_receive_fields = function(pos, formname, fields, sender)
+}
+
+
+local off_def = table.copy(nodedef)
+
+off_def.tiles = {"mesecons_onlinedetector_online_detector_off.png"}
+
+off_def.mesecons = {
+	receptor = {
+		state = mesecon.state.off,
+		rules = mesecon.rules.alldirs,
+	},
+}
+
+function off_def.on_receive_fields(pos, formname, fields, sender)
 	if fields.name then
 		local meta = minetest.get_meta(pos)
 		meta:set_string("name", fields.name)
 		meta:set_string("formspec", get_detector_form(fields.name))
 		update_detector_off(pos, fields.name)
 	end
-	end,
+end
-})
 
-minetest.register_node("mesecons_onlinedetector:online_detector_on", {
+if has_mcl_core then
-	description = S("Online Detector"),
+	--off_def.groups = {cracky = 2, mesecon_detector_off = 1, mesecon = 2}
-	_doc_items_longdesc = S("Allows you to know if a player is connected."),
+	off_def.groups = {handy = 1, mesecon_detector_off = 1, mesecon = 2}
-	tiles = {"mesecons_onlinedetector_online_detector_on.png"},
+else
-	groups = {cracky = 2, mesecon_detector_on = 1, mesecon = 2, not_in_creative_inventory = 1},
+	off_def.groups = {cracky = 2, mesecon_detector_off = 1, mesecon = 2}
-	drop = "mesecons_onlinedetector:online_detector_off",
+end
-	mesecons = {
+
+minetest.register_node("mesecons_onlinedetector:online_detector_off", off_def)
+
+
+local on_def = table.copy(nodedef)
+
+on_def.tiles = {"mesecons_onlinedetector_online_detector_on.png"}
+
+on_def.mesecons = {
 	receptor = {
 		state = mesecon.state.on,
 		rules = mesecon.rules.alldirs,
 	},
-	},
+}
-	on_construct = function(pos)
+
-		local meta = minetest.get_meta(pos)
+function on_def.on_receive_fields(pos, formname, fields, sender)
-		meta:set_string("formspec", get_detector_form(meta:get_string("name")))
-	end,
-	on_receive_fields = function(pos, formname, fields, sender)
 	if fields.name then
 		local meta = minetest.get_meta(pos)
 		meta:set_string("name", fields.name)
 		meta:set_string("formspec", get_detector_form(fields.name))
 		update_detector_on(pos, fields.name)
 	end
-	end,
+end
-})
+
+if has_mcl_core then
+	--on_def.groups = {cracky = 2, mesecon_detector_off = 1, mesecon = 2}
+	on_def.groups = {handy = 1, mesecon_detector_on = 1, mesecon = 2}
+else
+	on_def.groups = {cracky = 2, mesecon_detector_on = 1, mesecon = 2}
+end
+
+minetest.register_node("mesecons_onlinedetector:online_detector_on", on_def)
 
 minetest.register_abm({
 	label = "mesecons_onlinedetector:online_detector_off",
@@ -109,13 +129,24 @@ minetest.register_abm({
 	end,
 })
 
---[[minetest.register_craft({
+if minetest.get_modpath("default") then
+	minetest.register_craft({
 		output = "mesecons_onlinedetector:online_detector_off",
 		recipe = {
-		{'mcl_dye:black', 'mcl_dye:black', 'mcl_dye:black'},
+			{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
-		{'mcl_dye:black', 'pala_paladium:paladium_ingot', 'mcl_dye:black'},
+			{"default:steel_ingot", "mesecons_luacontroller:luacontroller0000", "default:steel_ingot"},
-		{'pala_paladium:titanium_ingot', 'pala_paladium:titanium_ingot', 'pala_paladium:titanium_ingot'},
+			{"default:stone", "default:stone", "default:stone"},
-	}
+		},
-})]]
+	})
+elseif has_mcl_core then
+	minetest.register_craft({
+		output = "mesecons_onlinedetector:online_detector_off",
+		recipe = {
+			{"mcl_core:iron_ingot", "mcl_core:iron_ingot", "mcl_core:iron_ingot"},
+			{"mcl_core:iron_ingot", "mesecons:wire_00000000_off", "mcl_core:iron_ingot"},
+			{"mcl_core:stone", "mcl_core:stone", "mcl_core:stone"},
+		},
+	})
+end
 
 minetest.log("action", "[mesecons_onlinedetector] loaded succesfully")

mod.conf

@@ -1,4 +1,5 @@
 name = mesecons_onlinedetector
 description = Add online detector to mesecons
 depends = mesecons
+optional_depends = default, mcl_core, mesecons_luacontroller
 author = AFCMS