maggems_teleport/init.lua

-- minetest.forceload_block(pos)
-- minetest.forceload_free_block(pos)

local set_teleport = function(itemstack, user, pointed_thing)
	-- TODO
	local pos = pointed_thing.under
	local node = minetest.get_node(pos)
	if (node.name ~= "maggems_landmark:home") then
		minetest.log("action", "flower not attuned yet")
		return
	end
	local meta = itemstack:get_meta()
	local home = minetest.get_meta(pos)
	pos.y = pos.y + 1
	-- TODO: make sure there is air above
	meta:set_string("maggems_landmark:home", minetest.serialize(pos))
	meta:set_string("description", "TP Flower (to " .. home:get_string("maggems_landmark:name") .. ")")
	return itemstack
end

local teleport = function(itemstack, user, pointed_thing)
	-- TODO: this better
	local pos = minetest.deserialize(itemstack:get_meta():get_string("maggems_landmark:home"))
	if (minetest.get_node(pos).name ~= "maggems_teleport:flower") then
		minetest.log("warning", "expected TP flower, got " .. minetest.get_node(pos).name)
		return ""
	end
	user:set_pos(pos)
	minetest.remove_node(pos)
	minetest.forceload_free_block(pos)
	return ""
end

minetest.register_node("maggems_teleport:flower", {
	description = "TP Flower",
	drawtype = "plantlike",
	waving = 0,
	tiles = {{
		name = "maggems_teleport_flower_animated.png",
		animation = {
			type = "vertical_frames",
			aspect_w = 16,
			aspect_h = 16,
			length = 1.0,
		}
	}},
	inventory_image = "maggems_teleport_flower.png",
	wield_image = "maggems_teleport_flower.png",
	sunlight_propagates = true,
	paramtype = "light",
	light_source = 2,
	walkable = false,
	buildable_to = false,
	groups = {attached_node = 1, flower = 1},
	-- sounds = default.node_sound_leaves_defaults(),
	selection_box = {
		type = "fixed",
		fixed = {-2 / 16, -0.5, -2 / 16, 2 / 16, 2 / 16, 2 / 16}
	},
	stack_max = 1,
	on_place = function(itemstack, placer, pointed_thing)
		-- only place if attuned
		local meta = itemstack:get_meta()
		if (meta:get("maggems_landmark:home") == nil) then
			return set_teleport(itemstack, placer, pointed_thing)
		end
		return minetest.item_place(itemstack, placer, pointed_thing)
	end,
	node_placement_prediction = "",
	after_place_node = function(pos, placer, itemstack, pointed_thing)
		-- add metadata
		local meta = itemstack:get_meta()
		placer:set_pos(minetest.deserialize(meta:get_string("maggems_landmark:home")))
		itemstack:replace("maggems_teleport:flower_active")
		meta = itemstack:get_meta()
		-- TODO: this properly
		meta:set_string("maggems_landmark:home", minetest.serialize(pos))
		minetest.forceload_block(pos)
		return true
	end,
	after_destruct = function(pos, oldnode)
		minetest.forceload_free_block(pos)
	end,
})

minetest.register_tool("maggems_teleport:flower_active", {
	description = "TP Flower (Active)",
	inventory_image = "maggems_teleport_flower_active.png",
	wield_image = "maggems_teleport_flower_active.png",
--	groups = {attached_node = 1, flower = 1},
	-- sounds = default.node_sound_leaves_defaults(),
	stack_max = 1,
	on_place = teleport,
	on_secondary_use = teleport,
})

minetest.register_craft({
	output = 'maggems_teleport:flower',
	recipe = {
		{"",                    'maggems:misi_crystal',         ""},
		{"maggems:misi_crystal",'default:mese_crystal_fragment',"maggems:misi_crystal"},
		{"",                    'default:stick',                ""},
	}
})