modolith/mods/travelnet/register_travelnet.lua

-- contains the node definition for a general travelnet that can be used by anyone
--   further travelnets can only be installed by the owner or by people with the travelnet_attach priv
--   digging of such a travelnet is limited to the owner and to people with the
--   travelnet_remove priv (useful for admins to clean up)
-- (this can be overrided in config.lua)
-- Author: Sokomine

local S = minetest.get_translator("travelnet")

local travelnet_dyes = {}

local function on_interact(pos, _, player)
	local meta = minetest.get_meta(pos)
	local legacy_formspec = meta:get_string("formspec")
	if not travelnet.is_falsey_string(legacy_formspec) then
		meta:set_string("formspec", "")
	end

	local player_name = player:get_player_name()
	travelnet.show_current_formspec(pos, meta, player_name)
end

-- travelnet box register function
function travelnet.register_travelnet_box(cfg)
	minetest.register_node(cfg.nodename, {
		description = S("Travelnet-Box"),
		drawtype = "mesh",
		mesh = "travelnet.obj",
		sunlight_propagates = true,
		paramtype = "light",
		paramtype2 = "facedir",
		wield_scale = { x=0.6, y=0.6, z=0.6 },
		selection_box = travelnet.node_box,
		collision_box = travelnet.node_box,

		tiles = {
			"(travelnet_travelnet_front_color.png^[multiply:" .. cfg.color .. ")^travelnet_travelnet_front.png", -- backward view
			"(travelnet_travelnet_back_color.png^[multiply:"  .. cfg.color .. ")^travelnet_travelnet_back.png",  -- front view
			"(travelnet_travelnet_side_color.png^[multiply:"  .. cfg.color .. ")^travelnet_travelnet_side.png",  -- sides :)
			"travelnet_top.png", -- view from top
			"travelnet_bottom.png", -- view from bottom
		},

		use_texture_alpha = "clip",
		inventory_image = "travelnet_inv_base.png^(travelnet_inv_colorable.png^[multiply:" .. cfg.color .. ")",
		is_ground_content = false,
		groups = {
			travelnet = 1
		},
		light_source = cfg.light_source or 10,
		after_place_node = function(pos, placer)
			local meta = minetest.get_meta(pos)
			meta:set_string("infotext",       S("Travelnet-Box (unconfigured)"))
			meta:set_string("station_name",   "")
			meta:set_string("station_network","")
			meta:set_string("owner", placer:get_player_name())
			minetest.set_node(vector.add(pos, { x=0, y=1, z=0 }), { name="travelnet:hidden_top" })
		end,

		on_receive_fields = travelnet.on_receive_fields,
		on_rightclick = on_interact,
		on_punch = function(pos, node, puncher)
			local item = puncher:get_wielded_item()
			local item_name = item:get_name()
			local player_name = puncher:get_player_name()
			if	    travelnet_dyes[item_name]
				and puncher:get_player_control().sneak
				and not minetest.is_protected(pos, player_name)
			then
				-- in-place travelnet coloring
				node.name = travelnet_dyes[item_name]
				minetest.swap_node(pos, node)
				item:take_item()
				puncher:set_wielded_item(item)
				return
			end
			on_interact(pos, nil, puncher)
		end,

		can_dig = function(pos, player)
			return travelnet.can_dig(pos, player, "travelnet box")
		end,

		after_dig_node = function(pos, oldnode, oldmetadata, digger)
			travelnet.remove_box(pos, oldnode, oldmetadata, digger)
		end,

		-- TNT and overenthusiastic DMs do not destroy travelnets
		on_blast = function() end,

		-- taken from VanessaEs homedecor fridge
		on_place = function(itemstack, placer, pointed_thing)
			local node = minetest.get_node(vector.add(pointed_thing.above, { x=0, y=1, z=0 }))
			local def = minetest.registered_nodes[node.name]
			-- leftover top nodes can be removed by placing a new travelnet underneath
			if (not def or not def.buildable_to) and node.name ~= "travelnet:hidden_top" then
				minetest.chat_send_player(
					placer:get_player_name(),
					S("Not enough vertical space to place the travelnet box!")
				)
				return
			end
			return minetest.item_place(itemstack, placer, pointed_thing)
		end,

		on_destruct = function(pos)
			local above = vector.add(pos, vector.new(0, 1, 0))
			if minetest.get_node(above).name == "travelnet:hidden_top" then
				minetest.remove_node(above)
			end
		end
	})

	if cfg.recipe then
		-- normal recipe
		minetest.register_craft({
			output = cfg.nodename,
			recipe = cfg.recipe,
		})
	end
	if cfg.dye then
		travelnet_dyes[cfg.dye] = cfg.nodename
		-- dye recipe
		minetest.register_craft({
			output = cfg.nodename,
			type = "shapeless",
			recipe = { "group:travelnet", cfg.dye },
		})
	end

	if minetest.get_modpath("mesecons_mvps") then
		mesecon.register_mvps_stopper(cfg.nodename)
	end
end