Add trash can

The trash can can be used either manually (via form) or at the end of
a pipe.  It destroys whatever is placed in it.

init.lua

@@ -113,6 +113,7 @@ dofile(pipeworks.modpath.."/item_transport.lua")
 dofile(pipeworks.modpath.."/flowing_logic.lua")
 dofile(pipeworks.modpath.."/crafts.lua")
 dofile(pipeworks.modpath.."/tubes.lua")
+dofile(pipeworks.modpath.."/trashcan.lua")
 
 if pipeworks.enable_pipes then dofile(pipeworks.modpath.."/pipes.lua") end
 if pipeworks.enable_teleport_tube then dofile(pipeworks.modpath.."/teleport_tube.lua") end

trashcan.lua

@@ -0,0 +1,51 @@
+minetest.register_node("pipeworks:trashcan", {
+	description = "Trash Can", 
+	drawtype = "normal", 
+	tiles = {
+		"pipeworks_trashcan_bottom.png",
+		"pipeworks_trashcan_bottom.png",
+		"pipeworks_trashcan_side.png",
+		"pipeworks_trashcan_side.png",
+		"pipeworks_trashcan_side.png",
+		"pipeworks_trashcan_side.png",
+	}, 
+	groups = { snappy = 3, tubedevice = 1, tubedevice_receiver = 1 }, 
+	tube = {
+		insert_object = function(pos, node, stack, direction)
+			return ItemStack("")
+		end, 
+		can_insert = function(pos, node, stack, direction)
+			return true
+		end, 
+		connect_sides = { left = 1, right = 1, front = 1, back = 1, top = 1, bottom = 1 },
+	}, 
+	on_construct = function(pos)
+		local meta = minetest.get_meta(pos)
+		meta:set_string("formspec",
+				"size[8,7]"..
+				"item_image[0,0;1,1;pipeworks:trashcan]"..
+				"label[1,0;Trash Can]"..
+				"list[current_name;trash;3.5,1;1,1;]"..
+				"list[current_player;main;0,3;8,4;]")
+		meta:set_string("infotext", "Trash Can")
+		meta:get_inventory():set_size("trash", 1)
+	end, 
+	after_place_node = function(pos)
+		pipeworks.scan_for_tube_objects(pos)
+	end,
+	after_dig_node = function(pos)
+		pipeworks.scan_for_tube_objects(pos)
+	end,
+	on_metadata_inventory_put = function(pos, listname, index, stack, player)
+		minetest.get_meta(pos):get_inventory():set_stack(listname, index, ItemStack(""))
+	end,
+})
+
+minetest.register_craft({
+	output = "pipeworks:trashcan",
+	recipe = {
+		{ "homedecor:plastic_sheeting", "homedecor:plastic_sheeting", "homedecor:plastic_sheeting" },
+		{ "default:steel_ingot", "", "default:steel_ingot" },
+		{ "default:steel_ingot", "default:steel_ingot", "default:steel_ingot" },
+	},
+})