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utils.lua

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+local utils, mod_storage = ...
+
+
+
+if minetest.get_translator and minetest.get_translator ("lwcomponents") then
+	utils.S = minetest.get_translator ("lwcomponents")
+elseif minetest.global_exists ("intllib") then
+   if intllib.make_gettext_pair then
+      utils.S = intllib.make_gettext_pair ()
+   else
+      utils.S = intllib.Getter ()
+   end
+else
+   utils.S = function (s) return s end
+end
+
+
+
+-- check for mesecon
+if minetest.global_exists ("mesecon") then
+	utils.mesecon_supported = true
+	utils.mesecon_state_on = mesecon.state.on
+	utils.mesecon_state_off = mesecon.state.off
+	utils.mesecon_receptor_on = mesecon.receptor_on
+	utils.mesecon_receptor_off = mesecon.receptor_off
+	utils.mesecon_default_rules = mesecon.rules.default
+	utils.mesecon_flat_rules = mesecon.rules.flat
+
+else
+	utils.mesecon_supported = false
+	utils.mesecon_state_on = "on"
+	utils.mesecon_state_off = "off"
+	utils.mesecon_default_rules = { }
+	utils.mesecon_flat_rules = { }
+
+	-- dummies
+	utils.mesecon_receptor_on = function (pos, rules)
+	end
+
+	utils.mesecon_receptor_off = function (pos, rules)
+	end
+
+end
+
+
+
+-- check for digilines
+if minetest.global_exists ("digilines") then
+	utils.digilines_supported = true
+	utils.digilines_receptor_send = digilines.receptor_send
+else
+	utils.digilines_supported = false
+
+	-- dummy
+	utils.digilines_receptor_send = function (pos, rules, channel, msg)
+	end
+end
+
+
+
+-- check for lwdrops
+if minetest.global_exists ("lwdrops") then
+	utils.lwdrops_supported = true
+	utils.on_destroy = lwdrops.on_destroy
+	utils.item_pickup = lwdrops.item_pickup
+	utils.item_drop = lwdrops.item_drop
+else
+	utils.lwdrops_supported = false
+
+	-- dummy
+	utils.on_destroy = function (itemstack)
+	end
+
+	utils.item_pickup = function (entity, cleanup)
+		local stack = nil
+
+		if entity and entity.name and entity.name == "__builtin:item" and
+			entity.itemstring and entity.itemstring ~= "" then
+
+			stack = ItemStack (entity.itemstring)
+
+			if cleanup ~= false then
+				entity.itemstring = ""
+				entity.object:remove ()
+			end
+		end
+
+		return stack
+	end
+
+	utils.item_drop = function (itemstack, dropper, pos)
+		return minetest.item_drop (itemstack, dropper, pos)
+	end
+end
+
+
+
+-- check for unifieddyes
+if minetest.global_exists ("unifieddyes") then
+	utils.unifieddyes_supported = true
+else
+	utils.unifieddyes_supported = false
+end
+
+
+
+function utils.can_interact_with_node (pos, player)
+	if not player or not player:is_player () then
+		return false
+	end
+
+	if minetest.check_player_privs (player, "protection_bypass") then
+		return true
+	end
+
+	local meta = minetest.get_meta (pos)
+	if meta then
+		local owner = meta:get_string ("owner")
+		local name = player:get_player_name ()
+
+		if not owner or owner == "" or owner == name then
+			return true
+		end
+	end
+
+	return false
+end
+
+
+
+--