drawers/lua/api.lua

--[[
Minetest Mod Storage Drawers - A Mod adding storage drawers

Copyright (C) 2017 LNJ <git@lnj.li>
Copyright (C) 2016 Mango Tango <mtango688@gmail.com>

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
]]

drawers.node_box_simple = {
	{-0.5, -0.5, -0.4375, 0.5, 0.5, 0.5},
	{-0.5, -0.5, -0.5, -0.4375, 0.5, -0.4375},
	{0.4375, -0.5, -0.5, 0.5, 0.5, -0.4375},
	{-0.4375, 0.4375, -0.5, 0.4375, 0.5, -0.4375},
	{-0.4375, -0.5, -0.5, 0.4375, -0.4375, -0.4375},
}

-- construct drawer
function drawers.drawer_on_construct(pos)
	local node = core.get_node(pos)
	local ndef = core.registered_nodes[node.name]
	local drawerType = ndef.groups.drawer

	local base_stack_max = core.nodedef_default.stack_max or 99
	local stack_max_factor = ndef.drawer_stack_max_factor or 24 -- 3x8
	stack_max_factor = math.floor(stack_max_factor / drawerType) -- drawerType => number of drawers in node

	-- meta
	local meta = core.get_meta(pos)

	i = 1
	while i <= drawerType do
		meta:set_string("name"..i, "")
		meta:set_int("count"..i, 0)
		meta:set_int("max_count"..i, base_stack_max * stack_max_factor)
		meta:set_int("base_stack_max"..i, base_stack_max)
		meta:set_string("entity_infotext"..i, drawers.gen_info_text("Empty", 0,
			stack_max_factor, base_stack_max))
		meta:set_int("stack_max_factor"..i, stack_max_factor)

		i = i + 1
	end

	drawers.spawn_visual(pos)
end

-- destruct drawer
function drawers.drawer_on_destruct(pos)
	local objs = core.get_objects_inside_radius(pos, 0.537)
	if not objs then return end

	for _, obj in pairs(objs) do
		if obj and obj:get_luaentity() and
				obj:get_luaentity().name == "drawers:visual" then
			obj:remove()
		end
	end
end

-- drop all items
function drawers.drawer_on_dig(pos, node, player)
	local drawerType = 1
	if core.registered_nodes[node.name] then
		drawerType = core.registered_nodes[node.name].groups.drawer
	end

	local meta = core.get_meta(pos)

	k = 1
	while k <= drawerType do
		-- don't add a number in meta fields for 1x1 drawers
		local vid = tostring(k)
		if drawerType == 1 then vid = "" end
		local count = meta:get_int("count"..vid)
		local name = meta:get_string("name"..vid)

		-- drop the items
		local stack_max = ItemStack(name):get_stack_max()

		local j = math.floor(count / stack_max) + 1
		local i = 1
		while i <= j do
			rndpos = drawers.randomize_pos(pos)
			if not (i == j) then
				core.add_item(rndpos, name .. " " .. stack_max)
			else
				core.add_item(rndpos, name .. " " .. count % stack_max)
			end
			i = i + 1
		end
		k = k + 1
	end

	-- remove node
	core.node_dig(pos, node, player)
end

function drawers.drawer_insert_object(pos, node, stack, direction)
	local drawer_visual = drawers.drawer_visuals[core.serialize(pos)]
	if not drawer_visual then return stack end

	local leftover = drawer_visual.try_insert_stack(drawer_visual, stack, true)
	return leftover
end

function drawers.register_drawer(name, def)
	def.description = def.description or "Drawer"
	def.drawtype = "nodebox"
	def.node_box = {type = "fixed", fixed = drawers.node_box_simple}
	def.collision_box = {type = "regular"}
	def.selection_box = {type = "regular"}
	def.paramtype = "light"
	def.paramtype2 = "facedir"
	def.legacy_facedir_simple = true
	def.groups = def.groups or {}
	def.drawer_stack_max_factor = def.drawer_stack_max_factor or 24

	-- events
	def.on_construct = drawers.drawer_on_construct
	def.on_destruct = drawers.drawer_on_destruct
	def.on_dig = drawers.drawer_on_dig

	if screwdriver then
		def.on_rotate = def.on_rotate or screwdriver.disallow
	end

	if pipeworks then
		def.groups.tubedevice = 1
		def.groups.tubedevice_receiver = 1
		def.tube = def.tube or {}
		def.tube.insert_object = def.tube.insert_object or
			drawers.drawer_insert_object
		def.tube.connect_sides = {left = 1, right = 1, back = 1, top = 1,
			bottom = 1}
		def.after_place_node = pipeworks.after_place
		def.after_dig_node = pipeworks.after_dig
	end

	-- normal drawer 1x1 = 1
	def1 = table.copy(def)
	def1.tiles = def.tiles or def.tiles1
	def1.tiles1 = nil
	def1.tiles4 = nil
	def1.groups.drawer = 1
	core.register_node(name .. "1", def1)
	core.register_alias(name, name .. "1") -- 1x1 drawer is the default one

	-- 2x2 = 4
	def4 = table.copy(def)
	def4.description = def4.description .. " (2x2)"
	def4.tiles = def.tiles4
	def4.tiles1 = nil
	def4.tiles4 = nil
	def4.groups.drawer = 4
	core.register_node(name .. "4", def4)

	if (not def.no_craft) and def.material then
		core.register_craft({
			output = name,
			recipe = {
				{def.material, def.material, def.material},
				{"", drawers.CHEST_ITEMSTRING, ""},
				{def.material, def.material, def.material}
			}
		})
	end
end