hopper reimplementation

Reimplemented hoppers and all (blast_furnace, furnace, smoker, composters, double chaets, shulker_boxes, droppers, bookshelvs and brewing_stands) connected nodes

GROUPS.md

@@ -170,16 +170,8 @@ These groups are used mostly for informational purposes
 * `ammo_bow=1`: Item is used as ammo for bows
 * `non_combat_armor=1`: Item can be equipped as armor, but is not made for combat (e.g. zombie head, pumpkin)
 * `container`: Node is a container which physically stores items within and has at least 1 inventory
-   * `container=2`: Has one inventory with list name `"main"`. Items can be placed and taken freely
+   * `container=1`: Container type, which does not allow hoppers to transfer items
-   * `container=3`: Same as `container=2`, but shulker boxes can not be inserted
+   * `container=2`: Items can be placed and taken freely. Can have inventory with list name `"main"` or define `_mcl_hoppers_on_try_pull`, `_mcl_hoppers_on_try_push`, `_mcl_hoppers_on_after_pull`, `_mcl_hoppers_on_after_push` to play along hoppers nicely.
-   * `container=4`: Furnace-like, has lists `"src"`, `"fuel"` and `"dst"`.
-                    It is expected that this also reacts on `on_timer`;
-                    the node timer must be started from other mods when they add into `"src"` or `"fuel"`
-   * `container=5`: Left part of a 2-part horizontal connected container. Both parts have a `"main"` inventory
-                    list. Both inventories are considered to belong together. This is used for large chests.
-   * `container=6`: Same as above, but for the right part.
-   * `container=7`: Has inventory list "`main`", no movement allowed
-   * `container=1`: Other/unspecified container type
 * `spawn_egg=1`: Spawn egg
 
 * `pressure_plate=1`: Pressure plate (off)

mods/CORE/mcl_util/init.lua

@@ -241,34 +241,25 @@ function mcl_util.get_double_container_neighbor_pos(pos, param2, side)
 	end
 end
 
--- Iterates through all items in the given inventory and
+--- Selects item stack to transfer from
--- returns the slot of the first item which matches a condition.
+---@param src_inventory InvRef Source innentory to pull from
--- Returns nil if no item was found.
+---@param src_list string Name of source inventory list to pull from
---- source_inventory: Inventory to take the item from
+---@param dst_inventory InvRef Destination inventory to push to
---- source_list: List name of the source inventory from which to take the item
+---@param dst_list string Name of destination inventory list to push to
---- destination_inventory: Put item into this inventory
+---@param condition? fun(stack: ItemStack) Condition which items are allowed to be transfered.
---- destination_list: List name of the destination inventory to which to put the item into
+---@return integer Item stack number to be transfered
---- condition: Function which takes an itemstack and returns true if it matches the desired item condition.
+function mcl_util.select_stack(src_inventory, src_list, dst_inventory, dst_list, condition)
----            If set to nil, the slot of the first item stack will be taken unconditionally.
+	local src_size = src_inventory:get_size(src_list)
--- dst_inventory and dst_list can also be nil if condition is nil.
-function mcl_util.get_eligible_transfer_item_slot(src_inventory, src_list, dst_inventory, dst_list, condition)
-	local size = src_inventory:get_size(src_list)
 	local stack
-	for i = 1, size do
+	for i = 1, src_size do
 		stack = src_inventory:get_stack(src_list, i)
-		if not stack:is_empty() and (condition == nil or condition(stack, src_inventory, src_list, dst_inventory, dst_list)) then
+		if not stack:is_empty() and dst_inventory:room_for_item(dst_list, stack) and ((condition == nil or condition(stack))) then
 			return i
 		end
 	end
 	return nil
 end
 
--- Returns true if itemstack is a shulker box
-local function is_not_shulker_box(itemstack)
-	local g = minetest.get_item_group(itemstack:get_name(), "shulker_box")
-	return g == 0 or g == nil
-end
-
 -- Moves a single item from one inventory to another.
 --- source_inventory: Inventory to take the item from
 --- source_list: List name of the source inventory from which to take the item
@@ -279,13 +270,6 @@ end
 -- Returns true on success and false on failure
 -- Possible failures: No item in source slot, destination inventory full
 function mcl_util.move_item(source_inventory, source_list, source_stack_id, destination_inventory, destination_list)
-	if source_stack_id == -1 then
-		source_stack_id = mcl_util.get_first_occupied_inventory_slot(source_inventory, source_list)
-		if source_stack_id == nil then
-			return false
-		end
-	end
-
 	if not source_inventory:is_empty(source_list) then
 		local stack = source_inventory:get_stack(source_list, source_stack_id)
 		if not stack:is_empty() then
@@ -303,150 +287,75 @@ function mcl_util.move_item(source_inventory, source_list, source_stack_id, dest
 	return false
 end
 
--- Moves a single item from one container node into another. Performs a variety of high-level
+--- Try pushing item from hopper inventory to destination inventory
--- checks to prevent invalid transfers such as shulker boxes into shulker boxes
+---@param pos Vector
---- source_pos: Position ({x,y,z}) of the node to take the item from
+---@param dst_pos Vector
---- destination_pos: Position ({x,y,z}) of the node to put the item into
+function mcl_util.hopper_push(pos, dst_pos)
---- source_list (optional): List name of the source inventory from which to take the item. Default is normally "main"; "dst" for furnace
+	local hop_inv = minetest.get_meta(pos):get_inventory()
---- source_stack_id (optional): The inventory position ID of the source inventory to take the item from (-1 for slot of the first valid item; -1 is default)
+	local hop_list = 'main'
---- destination_list (optional): List name of the destination inventory. Default is normally "main"; "src" for furnace
--- Returns true on success and false on failure.
-function mcl_util.move_item_container(source_pos, destination_pos, source_list, source_stack_id, destination_list)
-	local dpos = table.copy(destination_pos)
-	local spos = table.copy(source_pos)
-	local snode = minetest.get_node(spos)
-	local dnode = minetest.get_node(dpos)
 
-	local dctype = minetest.get_item_group(dnode.name, "container")
+	-- Get node pos' for item transfer
-	local sctype = minetest.get_item_group(snode.name, "container")
+	local dst = minetest.get_node(dst_pos)
+	if not minetest.registered_nodes[dst.name] then return end
+	local dst_type = minetest.get_item_group(dst.name, "container")
+	if dst_type ~= 2 then return end
+	local dst_def = minetest.registered_nodes[dst.name]
 
-	-- Container type 7 does not allow any movement
+	local dst_list = 'main'
-	if sctype == 7 then
+	local dst_inv, stack_id
-		return false
+	
+	if dst_def._mcl_hoppers_on_try_push then
+		dst_inv, dst_list, stack_id = dst_def._mcl_hoppers_on_try_push(dst_pos, pos, hop_inv, hop_list)
+	else
+		local dst_meta = minetest.get_meta(dst_pos)
+		dst_inv = dst_meta:get_inventory()
+		stack_id = mcl_util.select_stack(hop_inv, hop_list, dst_inv, dst_list)
 	end
 
-	-- Normalize double container by forcing to always use the left segment first
+	if stack_id ~= nil then
-	local function normalize_double_container(pos, node, ctype)
+		local ok = mcl_util.move_item(hop_inv, hop_list, stack_id, dst_inv, dst_list)
-		if ctype == 6 then
+		if dst_def._mcl_hoppers_on_after_push then
-			pos = mcl_util.get_double_container_neighbor_pos(pos, node.param2, "right")
+			dst_def._mcl_hoppers_on_after_push(dst_pos)
-			if not pos then
-				return false
-			end
-			node = minetest.get_node(pos)
-			ctype = minetest.get_item_group(node.name, "container")
-			-- The left segment seems incorrect? We better bail out!
-			if ctype ~= 5 then
-				return false
-			end
 		end
-		return pos, node, ctype
+		if ok then
-	end
+			return true
-
-	spos, snode, sctype = normalize_double_container(spos, snode, sctype)
-	dpos, dnode, dctype = normalize_double_container(dpos, dnode, dctype)
-	if not spos or not dpos then return false end
-
-	local smeta = minetest.get_meta(spos)
-	local dmeta = minetest.get_meta(dpos)
-
-	local sinv = smeta:get_inventory()
-	local dinv = dmeta:get_inventory()
-
-	-- Default source lists
-	if not source_list then
-		-- Main inventory for most container types
-		if sctype == 2 or sctype == 3 or sctype == 5 or sctype == 6 or sctype == 7 then
-			source_list = "main"
-			-- Furnace: output
-		elseif sctype == 4 then
-			source_list = "dst"
-			-- Unknown source container type. Bail out
-		else
-			return false
 		end
 	end
 
-	-- Automatically select stack slot ID if set to automatic
-	if not source_stack_id then
-		source_stack_id = -1
-	end
-	if source_stack_id == -1 then
-		local cond = nil
-		-- Prevent shulker box inception
-		if dctype == 3 then
-			cond = is_not_shulker_box
-		end
-		source_stack_id = mcl_util.get_eligible_transfer_item_slot(sinv, source_list, dinv, dpos, cond)
-		if not source_stack_id then
-			-- Try again if source is a double container
-			if sctype == 5 then
-				spos = mcl_util.get_double_container_neighbor_pos(spos, snode.param2, "left")
-				smeta = minetest.get_meta(spos)
-				sinv = smeta:get_inventory()
-
-				source_stack_id = mcl_util.get_eligible_transfer_item_slot(sinv, source_list, dinv, dpos, cond)
-				if not source_stack_id then
-					return false
-				end
-			else
-				return false
-			end
-		end
-	end
-
-	-- Abort transfer if shulker box wants to go into shulker box
-	if dctype == 3 then
-		local stack = sinv:get_stack(source_list, source_stack_id)
-		if stack and minetest.get_item_group(stack:get_name(), "shulker_box") == 1 then
-			return false
-		end
-	end
-	-- Container type 7 does not allow any placement
-	if dctype == 7 then
-		return false
-	end
-
-	-- If it's a container, put it into the container
-	if dctype ~= 0 then
-		-- Automatically select a destination list if omitted
-		if not destination_list then
-			-- Main inventory for most container types
-			if dctype == 2 or dctype == 3 or dctype == 5 or dctype == 6 or dctype == 7 then
-				destination_list = "main"
-				-- Furnace source slot
-			elseif dctype == 4 then
-				destination_list = "src"
-			end
-		end
-		if destination_list then
-			-- Move item
-			local ok = mcl_util.move_item(sinv, source_list, source_stack_id, dinv, destination_list)
-
-			-- Try transfer to neighbor node if transfer failed and double container
-			if not ok and dctype == 5 then
-				dpos = mcl_util.get_double_container_neighbor_pos(dpos, dnode.param2, "left")
-				dmeta = minetest.get_meta(dpos)
-				dinv = dmeta:get_inventory()
-
-				ok = mcl_util.move_item(sinv, source_list, source_stack_id, dinv, destination_list)
-			end
-
-			-- Update furnace
-			if ok and dctype == 4 then
-				-- Start furnace's timer function, it will sort out whether furnace can burn or not.
-				minetest.get_node_timer(dpos):start(1.0)
-			end
-
-			return ok
-		end
-	end
 	return false
 end
 
--- Returns the ID of the first non-empty slot in the given inventory list
+-- Try pulling from source inventory to hopper inventory
--- or nil, if inventory is empty.
+---@param pos Vector
-function mcl_util.get_first_occupied_inventory_slot(inventory, listname)
+---@param src_pos Vector
-	return mcl_util.get_eligible_transfer_item_slot(inventory, listname)
+function mcl_util.hopper_pull(pos, src_pos)
+	local hop_inv = minetest.get_meta(pos):get_inventory()
+	local hop_list = 'main'
+
+	-- Get node pos' for item transfer
+	local src = minetest.get_node(src_pos)
+	if not minetest.registered_nodes[src.name] then return end
+	local src_type = minetest.get_item_group(src.name, "container")
+	if src_type ~= 2 then return end
+	local src_def = minetest.registered_nodes[src.name]
+
+	local src_list = 'main'
+	local src_inv, stack_id
+	
+	if src_def._mcl_hoppers_on_try_pull then
+		src_inv, src_list, stack_id = src_def._mcl_hoppers_on_try_pull(src_pos, pos, hop_inv, hop_list)
+	else
+		local src_meta = minetest.get_meta(src_pos)
+		src_inv = src_meta:get_inventory()
+		stack_id = mcl_util.select_stack(src_inv, src_list, hop_inv, hop_list)
+	end
+
+	if stack_id ~= nil then
+		local ok = mcl_util.move_item(src_inv, src_list, stack_id, hop_inv, hop_list)
+		if src_def._mcl_hoppers_on_after_pull then
+			src_def._mcl_hoppers_on_after_pull(src_pos)
+		end
+	end
 end
 
 local function drop_item_stack(pos, stack)

mods/ITEMS/REDSTONE/mcl_droppers/init.lua

@@ -125,7 +125,11 @@ local dropperdef = {
 			local dropnode = minetest.get_node(droppos)
 			-- Do not drop into solid nodes, unless they are containers
 			local dropnodedef = minetest.registered_nodes[dropnode.name]
-			if dropnodedef.walkable and not dropnodedef.groups.container then
+			if dropnodedef.groups.container == 2 then
+				-- If they are containers - double down as hopper
+				mcl_util.hopper_push(pos, droppos)
+			end
+			if dropnodedef.walkable then
 				return
 			end
 			local stacks = {}
@@ -141,25 +145,18 @@ local dropperdef = {
 				local dropitem = ItemStack(stack)
 				dropitem:set_count(1)
 				local stack_id = stacks[r].stackpos
-
+				local pos_variation = 100
-				-- If it's a container, attempt to put it into the container
+				droppos = vector.offset(droppos,
-				local dropped = mcl_util.move_item_container(pos, droppos, nil, stack_id)
+					math.random(-pos_variation, pos_variation) / 1000,
-				-- No container?
+					math.random(-pos_variation, pos_variation) / 1000,
-				if not dropped and not dropnodedef.groups.container then
+					math.random(-pos_variation, pos_variation) / 1000
-					-- Drop item normally
+				)
-					local pos_variation = 100
+				local item_entity = minetest.add_item(droppos, dropitem)
-					droppos = vector.offset(droppos,
+				local drop_vel = vector.subtract(droppos, pos)
-						math.random(-pos_variation, pos_variation) / 1000,
+				local speed = 3
-						math.random(-pos_variation, pos_variation) / 1000,
+				item_entity:set_velocity(vector.multiply(drop_vel, speed))
-						math.random(-pos_variation, pos_variation) / 1000
+				stack:take_item()
-					)
+				inv:set_stack("main", stack_id, stack)
-					local item_entity = minetest.add_item(droppos, dropitem)
-					local drop_vel = vector.subtract(droppos, pos)
-					local speed = 3
-					item_entity:set_velocity(vector.multiply(drop_vel, speed))
-					stack:take_item()
-					inv:set_stack("main", stack_id, stack)
-				end
 			end
 		end,
 		rules = mesecon.rules.alldirs,

mods/ITEMS/mcl_blast_furnace/init.lua

@@ -453,7 +453,7 @@ minetest.register_node("mcl_blast_furnace:blast_furnace", {
 		"blast_furnace_side.png", "blast_furnace_front.png"
 	},
 	paramtype2 = "facedir",
-	groups = { pickaxey = 1, container = 4, deco_block = 1, material_stone = 1 },
+	groups = { pickaxey = 1, container = 2, deco_block = 1, material_stone = 1 },
 	is_ground_content = false,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 
@@ -514,6 +514,11 @@ minetest.register_node("mcl_blast_furnace:blast_furnace", {
 	_mcl_blast_resistance = 3.5,
 	_mcl_hardness = 3.5,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_pull = mcl_furnaces.hoppers_on_try_pull,
+	_mcl_hoppers_on_try_push = mcl_furnaces.hoppers_on_try_push,
+	_mcl_hoppers_on_after_push = function(pos)
+		minetest.get_node_timer(pos):start(1.0)
+	end,
 })
 
 minetest.register_node("mcl_blast_furnace:blast_furnace_active", {
@@ -531,7 +536,7 @@ minetest.register_node("mcl_blast_furnace:blast_furnace_active", {
 	paramtype = "light",
 	light_source = LIGHT_ACTIVE_FURNACE,
 	drop = "mcl_blast_furnace:blast_furnace",
-	groups = { pickaxey = 1, container = 4, deco_block = 1, not_in_creative_inventory = 1, material_stone = 1 },
+	groups = { pickaxey = 1, container = 2, deco_block = 1, not_in_creative_inventory = 1, material_stone = 1 },
 	is_ground_content = false,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 	on_timer = blast_furnace_node_timer,
@@ -574,6 +579,8 @@ minetest.register_node("mcl_blast_furnace:blast_furnace_active", {
 	_mcl_hardness = 3.5,
 	on_rotate = on_rotate,
 	after_rotate = after_rotate_active,
+	_mcl_hoppers_on_try_pull = mcl_furnaces.hoppers_on_try_pull,
+	_mcl_hoppers_on_try_push = mcl_furnaces.hoppers_on_try_push,
 })
 
 minetest.register_craft({

mods/ITEMS/mcl_books/init.lua

@@ -438,7 +438,7 @@ minetest.register_node("mcl_books:bookshelf", {
 		flammable = 3,
 		fire_encouragement = 30,
 		fire_flammability = 20,
-		container = 1
+		container = 2
 	},
 	drop = "mcl_books:book 3",
 	sounds = wood_sound,
@@ -472,6 +472,12 @@ minetest.register_node("mcl_books:bookshelf", {
 	on_blast = on_blast,
 	on_rightclick = bookshelf_gui,
 	on_destruct = close_forms,
+	_mcl_hoppers_on_try_push = function(pos, hop_pos, hop_inv, hop_list)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		return inv, "main", mcl_util.select_stack(hop_inv, hop_list, inv, "main",
+				function(stack) return minetest.get_item_group(stack:get_name(), "book") == 1 or stack:get_name() == "mcl_enchanting:book_enchanted" end)
+	end,
 })
 
 minetest.register_craft({

mods/ITEMS/mcl_brewing/init.lua

@@ -376,13 +376,41 @@ local function allow_take(pos, listname, index, stack, player)
 	end
 end
 
+local function hoppers_on_try_push(pos, hop_pos, hop_inv, hop_list)
+	local meta = minetest.get_meta(pos)
+	local inv = meta:get_inventory()
+	if math.abs(pos.y - hop_pos.y) > math.abs(pos.x - hop_pos.x) and math.abs(pos.y - hop_pos.y) > math.abs(pos.z - hop_pos.z) then
+		return inv, "input", mcl_util.select_stack(hop_inv, hop_list, inv, "input",
+			function(stack) return minetest.get_item_group(stack:get_name(), "brewitem") == 1 and minetest.get_item_group(stack:get_name(), "bottle") == 0 end)
+	else
+		local stack = mcl_util.select_stack(hop_inv, hop_list, inv, "fuel", function(stack) return stack:get_name() == "mcl_mobitems:blaze_powder" end)
+		if stack then
+			return inv, "fuel", stack
+		else
+			return inv, "stand", mcl_util.select_stack(hop_inv, hop_list, inv, "stand",
+				function(stack) return minetest.get_item_group(stack:get_name(), "bottle") == 1 end)
+		end
+	end
+end
+
+local function hoppers_on_try_pull(pos, hop_pos, hop_inv, hop_list)
+	local meta = minetest.get_meta(pos)
+	local stand_timer = meta:get_float("stand_timer") or 0
+	if stand_timer > 0 then
+		return nil, nil, nil
+	end
+
+	local inv = meta:get_inventory()
+	local stack = mcl_util.select_stack(inv, "stand", hop_inv, hop_list)
+	return inv, "stand", stack
+end
 
 minetest.register_node("mcl_brewing:stand_000", {
 	description = S("Brewing Stand"),
 	_doc_items_longdesc = S("The stand allows you to brew potions!"),
 	_doc_items_usagehelp = doc_string,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, brewitem=1 },
+	groups = {pickaxey=1, container = 2, brewitem=1 },
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -444,12 +472,20 @@ minetest.register_node("mcl_brewing:stand_000", {
 
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 minetest.register_node("mcl_brewing:stand_100", {
 	description = S("Brewing Stand"),
 	_doc_items_create_entry = false,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, not_in_craft_guide = 1},
+	groups = { pickaxey=1, container = 2, not_in_creative_inventory = 1, not_in_craft_guide = 1 },
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -514,13 +550,21 @@ minetest.register_node("mcl_brewing:stand_100", {
 	end,
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 
 minetest.register_node("mcl_brewing:stand_010", {
 	description = S("Brewing Stand"),
 	_doc_items_create_entry = false,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, not_in_craft_guide = 1},
+	groups = {pickaxey=1, container = 2, not_in_creative_inventory = 1, not_in_craft_guide = 1},
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -586,13 +630,21 @@ minetest.register_node("mcl_brewing:stand_010", {
 	end,
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 
 minetest.register_node("mcl_brewing:stand_001", {
 	description = S("Brewing Stand"),
 	_doc_items_create_entry = false,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, not_in_craft_guide = 1},
+	groups = {pickaxey=1, container = 2, not_in_creative_inventory = 1, not_in_craft_guide = 1},
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -653,13 +705,21 @@ minetest.register_node("mcl_brewing:stand_001", {
 	end,
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 
 minetest.register_node("mcl_brewing:stand_110", {
 	description = S("Brewing Stand"),
 	_doc_items_create_entry = false,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, not_in_craft_guide = 1},
+	groups = {pickaxey=1, container = 2, not_in_creative_inventory = 1, not_in_craft_guide = 1},
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -730,13 +790,21 @@ minetest.register_node("mcl_brewing:stand_110", {
 	end,
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 
 minetest.register_node("mcl_brewing:stand_101", {
 	description = S("Brewing Stand"),
 	_doc_items_create_entry = false,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, not_in_craft_guide = 1},
+	groups = {pickaxey=1, container = 2, not_in_creative_inventory = 1, not_in_craft_guide = 1},
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -803,13 +871,21 @@ minetest.register_node("mcl_brewing:stand_101", {
 	end,
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 
 minetest.register_node("mcl_brewing:stand_011", {
 	description = S("Brewing Stand"),
 	_doc_items_create_entry = false,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, not_in_craft_guide = 1},
+	groups = {pickaxey=1, container = 2, not_in_creative_inventory = 1, not_in_craft_guide = 1},
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -876,13 +952,21 @@ minetest.register_node("mcl_brewing:stand_011", {
 	end,
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 
 minetest.register_node("mcl_brewing:stand_111", {
 	description = S("Brewing Stand"),
 	_doc_items_create_entry = false,
 	_tt_help = S("Brew Potions"),
-	groups = {pickaxey=1, not_in_creative_inventory = 1, not_in_craft_guide = 1},
+	groups = {pickaxey=1, container = 2, not_in_creative_inventory = 1, not_in_craft_guide = 1},
 	tiles = tiles,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
 	drop = "mcl_brewing:stand",
@@ -956,6 +1040,14 @@ minetest.register_node("mcl_brewing:stand_111", {
 	end,
 	on_timer = brewing_stand_timer,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_push = hoppers_on_try_push,
+	_mcl_hoppers_on_try_pull = hoppers_on_try_pull,
+	_mcl_hoppers_on_after_push = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		on_put(pos, nil, nil, nil, nil)
+	end,
 })
 
 minetest.register_craft({

mods/ITEMS/mcl_chests/init.lua

@@ -10,6 +10,8 @@ local sf = string.format
 
 local mod_doc = minetest.get_modpath("doc")
 
+mcl_chests = {}
+
 -- Christmas chest setup
 local it_is_christmas = false
 local date = os.date("*t")
@@ -596,7 +598,7 @@ local function register_chest(basename, desc, longdesc, usagehelp, tt_help, tile
 		groups = {
 			handy = 1,
 			axey = 1,
-			container = 5,
+			container = 2,
 			not_in_creative_inventory = 1,
 			material_wood = 1,
 			flammable = -1,
@@ -751,6 +753,34 @@ local function register_chest(basename, desc, longdesc, usagehelp, tt_help, tile
 		end,
 		mesecons = mesecons,
 		on_rotate = no_rotate,
+		_mcl_hoppers_on_try_pull = function(pos, hop_pos, hop_inv, hop_list)
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			local stack_id = mcl_util.select_stack(inv, "main", hop_inv, hop_list)
+			if stack_id ~= nil then
+				return inv, "main", stack_id
+			end
+			local node = minetest.get_node(pos)
+			local pos_other = mcl_util.get_double_container_neighbor_pos(pos, node.param2, "left")
+			local meta_other = minetest.get_meta(pos_other)
+			local inv_other = meta_other:get_inventory()
+			stack_id = mcl_util.select_stack(inv_other, "main", hop_inv, hop_list)
+			return inv_other, "main", stack_id
+		end,
+		_mcl_hoppers_on_try_push = function(pos, hop_pos, hop_inv, hop_list)
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			local stack_id = mcl_util.select_stack(hop_inv, hop_list, inv, "main")
+			if stack_id ~= nil then
+				return inv, "main", stack_id
+			end
+			local node = minetest.get_node(pos)
+			local pos_other = mcl_util.get_double_container_neighbor_pos(pos, node.param2, "left")
+			local meta_other = minetest.get_meta(pos_other)
+			local inv_other = meta_other:get_inventory()
+			stack_id = mcl_util.select_stack(hop_inv, hop_list, inv_other, "main")
+			return inv_other, "main", stack_id
+		end,
 	})
 
 	minetest.register_node("mcl_chests:" .. basename .. "_right", {
@@ -766,7 +796,7 @@ local function register_chest(basename, desc, longdesc, usagehelp, tt_help, tile
 		groups = {
 			handy = 1,
 			axey = 1,
-			container = 6,
+			container = 2,
 			not_in_creative_inventory = 1,
 			material_wood = 1,
 			flammable = -1,
@@ -916,6 +946,34 @@ local function register_chest(basename, desc, longdesc, usagehelp, tt_help, tile
 		end,
 		mesecons = mesecons,
 		on_rotate = no_rotate,
+		_mcl_hoppers_on_try_pull = function(pos, hop_pos, hop_inv, hop_list)
+			local node = minetest.get_node(pos)
+			local pos_other = mcl_util.get_double_container_neighbor_pos(pos, node.param2, "right")
+			local meta_other = minetest.get_meta(pos_other)
+			local inv_other = meta_other:get_inventory()
+			local stack_id = mcl_util.select_stack(inv_other, "main", hop_inv, hop_list)
+			if stack_id ~= nil then
+				return inv_other, "main", stack_id
+			end
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			stack_id = mcl_util.select_stack(inv, "main", hop_inv, hop_list)
+			return inv, "main", stack_id
+		end,
+		_mcl_hoppers_on_try_push = function(pos, hop_pos, hop_inv, hop_list)
+			local node = minetest.get_node(pos)
+			local pos_other = mcl_util.get_double_container_neighbor_pos(pos, node.param2, "right")
+			local meta_other = minetest.get_meta(pos_other)
+			local inv_other = meta_other:get_inventory()
+			local stack_id = mcl_util.select_stack(hop_inv, hop_list, inv_other, "main")
+			if stack_id ~= nil then
+				return inv_other, "main", stack_id
+			end
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			stack_id = mcl_util.select_stack(hop_inv, hop_list, inv, "main")
+			return inv, "main", stack_id
+		end,
 	})
 
 	if mod_doc then
@@ -1305,7 +1363,7 @@ for color, desc in pairs(boxtypes) do
 		groups = {
 			handy = 1,
 			pickaxey = 1,
-			container = 3,
+			container = 2,
 			deco_block = 1,
 			dig_by_piston = 1,
 			shulker_box = 1,
@@ -1378,7 +1436,7 @@ for color, desc in pairs(boxtypes) do
 		groups = {
 			handy = 1,
 			pickaxey = 1,
-			container = 3,
+			container = 2,
 			deco_block = 1,
 			dig_by_piston = 1,
 			shulker_box = 1,
@@ -1471,6 +1529,11 @@ for color, desc in pairs(boxtypes) do
 		end,
 		_mcl_blast_resistance = 6,
 		_mcl_hardness = 2,
+		_mcl_hoppers_on_try_push = function(pos, hop_pos, hop_inv, hop_list)
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			return inv, "main", mcl_util.select_stack(hop_inv, hop_list, inv, "main", mcl_chests.is_not_shulker_box)
+		end,
 	})
 
 	if mod_doc and not is_canonical then
@@ -1487,6 +1550,14 @@ for color, desc in pairs(boxtypes) do
 	})
 end
 
+--- Returns false if itemstack is a shulker box
+---@param itemstack ItemStack
+---@return boolean
+function mcl_chests.is_not_shulker_box(stack)
+	local g = minetest.get_item_group(stack:get_name(), "shulker_box")
+	return g == 0 or g == nil
+end
+
 minetest.register_craft({
 	output = "mcl_chests:violet_shulker_box",
 	recipe = {

mods/ITEMS/mcl_composters/init.lua

@@ -81,34 +81,44 @@ local function composter_add_item(pos, node, player, itemstack, pointed_thing)
 				max_hear_distance = 16,
 			}, true)
 		end
-		-- calculate leveling up chance
+		composter_progress_chance(pos, node, chance)
-		local rand = math.random(0,100)
+	end
-		if chance >= rand then
+	return itemstack
-			-- get current compost level
+end
-			local level = registered_nodes[node.name]["_mcl_compost_level"]
+
-			-- spawn green particles above new layer
+--- Math and node swap during compost progression
-			mcl_dye.add_bone_meal_particle(vector_offset(pos, 0, level/8, 0))
+---@param pos Vector Position of the node
-			-- update composter block
+---@param node node
-			if level < 7 then
+---@param chance integer Value of "compostability" group of inserted item 
-				level = level + 1
+function composter_progress_chance(pos, node, chance)
-			else
+	-- calculate leveling up chance
-				level = "ready"
+	local rand = math.random(0,100)
-			end
+	if chance >= rand then
-			swap_node(pos, {name = "mcl_composters:composter_" .. level})
+		-- get current compost level
-			minetest.sound_play({name="default_grass_footstep", gain=0.4}, {
+		local level = registered_nodes[node.name]["_mcl_compost_level"]
-				pos = pos,
+		-- spawn green particles above new layer
-				gain= 0.4,
+		mcl_dye.add_bone_meal_particle(vector_offset(pos, 0, level/8, 0))
-				max_hear_distance = 16,
+		-- update composter block
-			}, true)
+		if level < 7 then
-			-- a full composter becomes ready for harvest after one second
+			level = level + 1
-			-- the block will get updated by the node timer callback set in node reg def
+		else
-			if level == 7 then
+			level = "ready"
-				local timer = get_node_timer(pos)
+		end
+		swap_node(pos, {name = "mcl_composters:composter_" .. level})
+		minetest.sound_play({name="default_grass_footstep", gain=0.4}, {
+			pos = pos,
+			gain= 0.4,
+			max_hear_distance = 16,
+		}, true)
+		-- a full composter becomes ready for harvest after one second
+		-- the block will get updated by the node timer callback set in node reg def
+		if level == 7 then
+			local timer = get_node_timer(pos)
+			if not timer:is_started() then
 				timer:start(1)
 			end
 		end
 	end
-	return itemstack
 end
 
 --- Update a full composter block to ready for harvesting.
@@ -147,6 +157,10 @@ local function composter_harvest(pos, node, player, itemstack, pointed_thing)
 		record_protection_violation(pos, name)
 		return itemstack
 	end
+	local meta = minetest.get_meta(pos)
+	local inv = meta:get_inventory()
+	--remove bone meal from internal inventory
+	inv:set_stack("dst", 1, ItemStack())
 	-- reset ready type composter to empty type
 	swap_node(pos, {name="mcl_composters:composter"})
 	-- spawn bone meal item
@@ -175,6 +189,14 @@ local function composter_get_nodeboxes(level)
 	}
 end
 
+local function hopper_push_condition(stack)
+	local chance = get_item_group(stack:get_name(), "compostability")
+	if chance > 0 then
+		return true
+	end
+	return false
+end
+
 --- Register empty composter node.
 --
 -- This is the craftable base model that can be placed in an inventory.
@@ -197,12 +219,40 @@ minetest.register_node("mcl_composters:composter", {
 	groups = {
 		handy=1, material_wood=1, deco_block=1, dirtifier=1,
 		flammable=2, fire_encouragement=3, fire_flammability=4,
+		container = 2
 	},
 	sounds = mcl_sounds.node_sound_wood_defaults(),
 	_mcl_hardness = 0.6,
 	_mcl_blast_resistance = 0.6,
 	_mcl_compost_level = 0,
-	on_rightclick = composter_add_item
+	on_rightclick = composter_add_item,
+	on_construct = function(pos)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		inv:set_size("src", 1)
+		inv:set_size("dst", 1)
+	end,
+	_mcl_hoppers_on_try_pull = function(pos, hop_pos, hop_inv, hop_list)
+		return nil, nil, nil
+	end,
+	_mcl_hoppers_on_try_push = function(pos, hop_pos, hop_inv, hop_list)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		return inv, "src", mcl_util.select_stack(hop_inv, hop_list, inv, "src", hopper_push_condition)
+	end,
+	_mcl_hoppers_on_after_push = function(pos)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		local stack = inv:get_stack("src", 1)
+		if not stack:is_empty() then
+			local chance = get_item_group(stack:get_name(), "compostability")
+			if chance > 0 then
+				local node = minetest.get_node(pos)
+				composter_progress_chance(pos, node, chance)
+			end
+		end
+		inv:remove_item("src", stack)
+	end,
 })
 
 --- Template function for composters with compost.
@@ -228,7 +278,7 @@ local function register_filled_composter(level)
 			handy=1, material_wood=1, deco_block=1, dirtifier=1,
 			not_in_creative_inventory=1, not_in_craft_guide=1,
 			flammable=2, fire_encouragement=3, fire_flammability=4,
-			comparator_signal=level
+			comparator_signal=level, container = 2
 		},
 		sounds = mcl_sounds.node_sound_wood_defaults(),
 		drop = "mcl_composters:composter",
@@ -236,7 +286,28 @@ local function register_filled_composter(level)
 		_mcl_blast_resistance = 0.6,
 		_mcl_compost_level = level,
 		on_rightclick = composter_add_item,
-		on_timer = composter_ready
+		on_timer = composter_ready,
+		_mcl_hoppers_on_try_pull = function(pos, hop_pos, hop_inv, hop_list)
+			return nil, nil, nil
+		end,
+		_mcl_hoppers_on_try_push = function(pos, hop_pos, hop_inv, hop_list)
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			return inv, "src", mcl_util.select_stack(hop_inv, hop_list, inv, "src", hopper_push_condition)
+		end,
+		_mcl_hoppers_on_after_push = function(pos)
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			local stack = inv:get_stack("src", 1)
+			if not stack:is_empty() then
+				local chance = get_item_group(stack:get_name(), "compostability")
+				if chance > 0 then
+					local node = minetest.get_node(pos)
+					composter_progress_chance(pos, node, chance)
+				end
+			end
+			inv:remove_item("src", stack)
+		end,
 	})
 
 	-- Add entry aliases for the Help
@@ -270,14 +341,32 @@ minetest.register_node("mcl_composters:composter_ready", {
 		handy=1, material_wood=1, deco_block=1, dirtifier=1,
 		not_in_creative_inventory=1, not_in_craft_guide=1,
 		flammable=2, fire_encouragement=3, fire_flammability=4,
-		comparator_signal=8
+		comparator_signal=8, container = 2
 	},
 	sounds = mcl_sounds.node_sound_wood_defaults(),
 	drop = "mcl_composters:composter",
 	_mcl_hardness = 0.6,
 	_mcl_blast_resistance = 0.6,
 	_mcl_compost_level = 7,
-	on_rightclick = composter_harvest
+	on_rightclick = composter_harvest,
+	_mcl_hoppers_on_try_push = function(pos, hop_pos, hop_inv, hop_list)
+		return nil, nil, nil
+	end,
+	_mcl_hoppers_on_try_pull = function(pos, hop_pos, hop_inv, hop_list)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		--remove bone meal from internal inventory
+		inv:set_stack("dst", 1, ItemStack())
+		inv:add_item("dst", "mcl_bone_meal:bone_meal")
+		local stack = inv:get_stack("dst", 1)
+		if not stack:is_empty() and hop_inv:room_for_item(hop_list, stack) then
+			return inv, "dst", 1
+		end
+		return nil, nil, nil
+	end,
+	_mcl_hoppers_on_after_pull = function(pos)
+		minetest.swap_node(pos, {name = "mcl_composters:composter"})
+	end,
 })
 
 -- Add entry aliases for the Help

mods/ITEMS/mcl_composters/mod.conf

@@ -1,5 +1,5 @@
 name = mcl_composters
 author = kabou
 description = Composters can convert various organic items into bonemeal.
-depends = mcl_core, mcl_sounds, mcl_dye
+depends = mcl_core, mcl_sounds, mcl_dye, mcl_hoppers
 optional_depends = doc

mods/ITEMS/mcl_furnaces/init.lua

@@ -4,6 +4,8 @@ local F = minetest.formspec_escape
 
 local LIGHT_ACTIVE_FURNACE = 13
 
+mcl_furnaces = {}
+
 --
 -- Formspecs
 --
@@ -445,6 +447,31 @@ local function furnace_node_timer(pos, elapsed)
 	return result
 end
 
+function mcl_furnaces.hoppers_on_try_pull(pos, hop_pos, hop_inv, hop_list)
+	local meta = minetest.get_meta(pos)
+	local inv = meta:get_inventory()
+	local stack = inv:get_stack("dst", 1)
+	if not stack:is_empty() and hop_inv:room_for_item(hop_list, stack) then
+		return inv, "dst", 1
+	end
+	-- Allow empty bucket extraction
+	stack = inv:get_stack("fuel", 1)
+	if not stack:is_empty() and not mcl_util.is_fuel(stack) and hop_inv:room_for_item(hop_list, stack) then
+		return inv, "fuel", 1
+	end
+	return nil, nil, nil
+end
+
+function mcl_furnaces.hoppers_on_try_push(pos, hop_pos, hop_inv, hop_list)
+	local meta = minetest.get_meta(pos)
+	local inv = meta:get_inventory()
+	if math.abs(pos.y - hop_pos.y) > math.abs(pos.x - hop_pos.x) and math.abs(pos.y - hop_pos.y) > math.abs(pos.z - hop_pos.z) then
+		return inv, "src", mcl_util.select_stack(hop_inv, hop_list, inv, "src")
+	else
+		return inv, "fuel", mcl_util.select_stack(hop_inv, hop_list, inv, "fuel", mcl_util.is_fuel)
+	end
+end
+
 local on_rotate, after_rotate_active
 if minetest.get_modpath("screwdriver") then
 	on_rotate = screwdriver.rotate_simple
@@ -475,7 +502,7 @@ minetest.register_node("mcl_furnaces:furnace", {
 		"default_furnace_side.png", "default_furnace_front.png"
 	},
 	paramtype2 = "facedir",
-	groups = { pickaxey = 1, container = 4, deco_block = 1, material_stone = 1 },
+	groups = { pickaxey = 1, container = 2, deco_block = 1, material_stone = 1 },
 	is_ground_content = false,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 
@@ -538,6 +565,11 @@ minetest.register_node("mcl_furnaces:furnace", {
 	_mcl_blast_resistance = 3.5,
 	_mcl_hardness = 3.5,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_pull = mcl_furnaces.hoppers_on_try_pull,
+	_mcl_hoppers_on_try_push = mcl_furnaces.hoppers_on_try_push,
+	_mcl_hoppers_on_after_push = function(pos)
+		minetest.get_node_timer(pos):start(1.0)
+	end,
 })
 
 minetest.register_node("mcl_furnaces:furnace_active", {
@@ -552,7 +584,7 @@ minetest.register_node("mcl_furnaces:furnace_active", {
 	paramtype = "light",
 	light_source = LIGHT_ACTIVE_FURNACE,
 	drop = "mcl_furnaces:furnace",
-	groups = { pickaxey = 1, container = 4, deco_block = 1, not_in_creative_inventory = 1, material_stone = 1 },
+	groups = { pickaxey = 1, container = 2, deco_block = 1, not_in_creative_inventory = 1, material_stone = 1 },
 	is_ground_content = false,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 	on_timer = furnace_node_timer,
@@ -592,6 +624,8 @@ minetest.register_node("mcl_furnaces:furnace_active", {
 	_mcl_hardness = 3.5,
 	on_rotate = on_rotate,
 	after_rotate = after_rotate_active,
+	_mcl_hoppers_on_try_pull = mcl_furnaces.hoppers_on_try_pull,
+	_mcl_hoppers_on_try_push = mcl_furnaces.hoppers_on_try_push,
 })
 
 minetest.register_craft({

mods/ITEMS/mcl_hoppers/init.lua

@@ -470,31 +470,38 @@ minetest.register_abm({
 				if entity and entity.name then
 					--mcl_log("Name of object near: " .. tostring(entity.name))
 
-					if entity.name == "mcl_minecarts:hopper_minecart" or entity.name == "mcl_minecarts:chest_minecart" then
+					if entity.name == "mcl_minecarts:hopper_minecart" or entity.name == "mcl_minecarts:chest_minecart" or entity.name == "mcl_boats:chest_boat" then
 						local hm_pos = entity.object:get_pos()
 						mcl_log("We have a minecart with inventory close: " .. minetest.pos_to_string(hm_pos))
 
-						--if hm_pos.y == pos.y + 1 then mcl_log("y is correct") end
+						local ent_pos_y
+						if entity.name == "mcl_minecarts:hopper_minecart" or entity.name == "mcl_minecarts:chest_minecart" then
+							ent_pos_y = hm_pos.y
+						elseif entity.name == "mcl_boats:chest_boat" then
+							ent_pos_y = math.floor(hm_pos.y + 0.8)
+						end
+
+						local DIST_FROM_MC = 1.5
+						--if ent_pos_y == pos.y - 1 then mcl_log("y is correct") end
 						--if (hm_pos.x >= pos.x - DIST_FROM_MC and hm_pos.x <= pos.x + DIST_FROM_MC) then mcl_log("x is within range") end
 						--if (hm_pos.z >= pos.z - DIST_FROM_MC and hm_pos.z <= pos.z + DIST_FROM_MC) then mcl_log("z is within range") end
 
-						local DIST_FROM_MC = 1.5
+						if (ent_pos_y == pos.y + 1)
-						if (hm_pos.y == pos.y + 1)
 							and (hm_pos.x >= pos.x - DIST_FROM_MC and hm_pos.x <= pos.x + DIST_FROM_MC)
 							and (hm_pos.z >= pos.z - DIST_FROM_MC and hm_pos.z <= pos.z + DIST_FROM_MC) then
 							mcl_log("Minecart close enough")
 							if entity.name == "mcl_minecarts:hopper_minecart" then
 								hopper_pull_from_mc(entity, pos, 5)
-							elseif entity.name == "mcl_minecarts:chest_minecart" then
+							elseif entity.name == "mcl_minecarts:chest_minecart" or entity.name == "mcl_boats:chest_boat" then
 								hopper_pull_from_mc(entity, pos, 27)
 							end
-						elseif (hm_pos.y == pos.y - 1)
+						elseif (ent_pos_y == pos.y - 1)
 							and (hm_pos.x >= pos.x - DIST_FROM_MC and hm_pos.x <= pos.x + DIST_FROM_MC)
 							and (hm_pos.z >= pos.z - DIST_FROM_MC and hm_pos.z <= pos.z + DIST_FROM_MC) then
 							mcl_log("Minecart close enough")
 							if entity.name == "mcl_minecarts:hopper_minecart" then
 								hopper_push_to_mc(entity, pos, 5)
-							elseif entity.name == "mcl_minecarts:chest_minecart" then
+							elseif entity.name == "mcl_minecarts:chest_minecart" or entity.name == "mcl_boats:chest_boat" then
 								hopper_push_to_mc(entity, pos, 27)
 							end
 						end
@@ -545,25 +552,7 @@ minetest.register_abm({
 	end,
 })
 
----Returns true if itemstack is fuel, but not for lava bucket if destination already has one
+-- Register push/pull for "straight" hopper
----@param itemstack ItemStack
----@param src_inventory InvRef
----@param src_list string
----@param dst_inventory InvRef
----@param dst_list string
----@return boolean
-local function is_transferrable_fuel(itemstack, src_inventory, src_list, dst_inventory, dst_list)
-	if mcl_util.is_fuel(itemstack) then
-		if itemstack:get_name() == "mcl_buckets:bucket_lava" then
-			return dst_inventory:is_empty(dst_list)
-		else
-			return true
-		end
-	else
-		return false
-	end
-end
-
 minetest.register_abm({
 	label = "Hopper/container item exchange",
 	nodenames = { "mcl_hoppers:hopper" },
@@ -571,31 +560,26 @@ minetest.register_abm({
 	interval = 1.0,
 	chance = 1,
 	action = function(pos, node, active_object_count, active_object_count_wider)
-		-- Get node pos' for item transfer
+		if minetest.get_node_timer(pos):is_started() then
-		local uppos   = vector.offset(pos, 0, 1, 0)
+			return
-		local downpos = vector.offset(pos, 0, -1, 0)
-
-		-- Suck an item from the container above into the hopper
-		local upnode = minetest.get_node(uppos)
-		if not minetest.registered_nodes[upnode.name] then return end
-		local g = minetest.get_item_group(upnode.name, "container")
-		local sucked = mcl_util.move_item_container(uppos, pos)
-
-		-- Also suck in non-fuel items from furnace fuel slot
-		if not sucked and g == 4 then
-			local finv = minetest.get_inventory({type = "node", pos = uppos})
-			if finv and not mcl_util.is_fuel(finv:get_stack("fuel", 1)) then
-				mcl_util.move_item_container(uppos, pos, "fuel")
-			end
 		end
 
-		-- Move an item from the hopper into container below
+		-- Move from internal inventory to dst first 
-		local downnode = minetest.get_node(downpos)
+		local dst_pos = vector.offset(pos, 0, -1, 0)
-		if not minetest.registered_nodes[downnode.name] then return end
+		local pushed = mcl_util.hopper_push(pos, dst_pos)
-		mcl_util.move_item_container(pos, downpos)
+		
+		local src_pos = vector.offset(pos, 0, 1, 0)
+		mcl_util.hopper_pull(pos, src_pos)
+
+		local dst_node = minetest.get_node(dst_pos)
+		if pushed and (dst_node.name == "mcl_hoppers:hopper" or dst_node.name == "mcl_hoppers:hopper_side") then
+			--Pause destination hopper
+			minetest.get_node_timer(dst_pos):start(1.0)
+		end
 	end,
 })
 
+-- Register push/pull for "bent" hopper
 minetest.register_abm({
 	label = "Side-hopper/container item exchange",
 	nodenames = { "mcl_hoppers:hopper_side" },
@@ -603,164 +587,36 @@ minetest.register_abm({
 	interval = 1.0,
 	chance = 1,
 	action = function(pos, node, active_object_count, active_object_count_wider)
+		if minetest.get_node_timer(pos):is_started() then
+			--Pause if already recived item this tick
+			return
+		end
+
 		-- Determine to which side the hopper is facing, get nodes
 		local face = minetest.get_node(pos).param2
-		local front = {}
+		local dst_pos = {}
 		if face == 0 then
-			front = vector.offset(pos, -1, 0, 0)
+			dst_pos = vector.offset(pos, -1, 0, 0)
 		elseif face == 1 then
-			front = vector.offset(pos, 0, 0, 1)
+			dst_pos = vector.offset(pos, 0, 0, 1)
 		elseif face == 2 then
-			front = vector.offset(pos, 1, 0, 0)
+			dst_pos = vector.offset(pos, 1, 0, 0)
 		elseif face == 3 then
-			front = vector.offset(pos, 0, 0, -1)
+			dst_pos = vector.offset(pos, 0, 0, -1)
 		end
-		local above = vector.offset(pos, 0, 1, 0)
+		local pushed = mcl_util.hopper_push(pos, dst_pos)
-
+		
-		local frontnode = minetest.get_node(front)
+		local src_pos = vector.offset(pos, 0, 1, 0)
-		if not minetest.registered_nodes[frontnode.name] then return end
+		mcl_util.hopper_pull(pos, src_pos)
-
+		
-		-- Suck an item from the container above into the hopper
+		local dst_node = minetest.get_node(dst_pos)
-		local abovenode = minetest.get_node(above)
+		if pushed and (dst_node.name == "mcl_hoppers:hopper" or dst_node.name == "mcl_hoppers:hopper_side") then
-		if not minetest.registered_nodes[abovenode.name] then return end
+			--Pause destination hopper
-		local g = minetest.get_item_group(abovenode.name, "container")
+			minetest.get_node_timer(dst_pos):start(1.0)
-		local sucked = mcl_util.move_item_container(above, pos)
-
-		-- Also suck in non-fuel items from furnace fuel slot
-		if not sucked and g == 4 then
-			local finv = minetest.get_inventory({type = "node", pos = above})
-			if finv and not mcl_util.is_fuel(finv:get_stack("fuel", 1)) then
-				mcl_util.move_item_container(above, pos, "fuel")
-			end
 		end
-
+	end,
-		-- Move an item from the hopper into the container to which the hopper points to
-		local g = minetest.get_item_group(frontnode.name, "container")
-		if g == 2 or g == 3 or g == 5 or g == 6 then
-			mcl_util.move_item_container(pos, front)
-		elseif g == 4 then
-			-- Put fuel into fuel slot
-			local sinv = minetest.get_inventory({type = "node", pos = pos})
-			local dinv = minetest.get_inventory({type = "node", pos = front})
-			local slot_id, _ = mcl_util.get_eligible_transfer_item_slot(sinv, "main", dinv, "fuel", is_transferrable_fuel)
-			if slot_id then
-				mcl_util.move_item_container(pos, front, nil, slot_id, "fuel")
-			end
-		end
-	end
 })
 
-if minetest.get_modpath("mcl_composters") then
-	minetest.register_abm({
-		label = "Bonemeal extraction from composter",
-		nodenames = {"mcl_hoppers:hopper", "mcl_hoppers:hopper_side"},
-		neighbors = {"mcl_composters:composter_ready"},
-		interval = 1.0,
-		chance = 1,
-		action = function(pos, node, active_object_count, active_object_count_wider)
-			local uppos = vector.offset(pos, 0, 1, 0)
-			--local downpos = vector.offset(pos, 0, -1, 0)
-
-			-- Get bonemeal from composter above
-			local upnode = minetest.get_node(uppos)
-			if upnode.name == "mcl_composters:composter_ready" then
-				local meta = minetest.get_meta(pos)
-				local inv = meta:get_inventory()
-
-				minetest.swap_node(uppos, {name = "mcl_composters:composter"})
-
-				inv:add_item("main", "mcl_bone_meal:bone_meal")
-			end
-		end,
-	})
-
-	---@param node node
-	---@return integer?
-	---@nodiscard
-	local function composter_level(node)
-		local nn = node.name
-		if nn == "mcl_composters:composter" then
-			return 0
-		elseif nn == "mcl_composters:composter_1" then
-			return 1
-		elseif nn == "mcl_composters:composter_2" then
-			return 2
-		elseif nn == "mcl_composters:composter_3" then
-			return 3
-		elseif nn == "mcl_composters:composter_4" then
-			return 4
-		elseif nn == "mcl_composters:composter_5" then
-			return 5
-		elseif nn == "mcl_composters:composter_6" then
-			return 6
-		elseif nn == "mcl_composters:composter_7" then
-			return 7
-		else
-			return nil
-		end
-	end
-
-	for i = 1, 7 do
-		assert(composter_level({name = "mcl_composters:composter_" .. i}) == i)
-	end
-
-	assert(composter_level({name = "mcl_composters:composter"}) == 0)
-	assert(composter_level({name = "mcl_composters:some_other_node"}) == nil)
-
-	minetest.register_abm({
-		label = "Add compostable items on composter",
-		nodenames = {"mcl_hoppers:hopper"},
-		neighbors = {
-			"mcl_composters:composter",
-			"mcl_composters:composter_1",
-			"mcl_composters:composter_2",
-			"mcl_composters:composter_3",
-			"mcl_composters:composter_4",
-			"mcl_composters:composter_5",
-			"mcl_composters:composter_6",
-			"mcl_composters:composter_7",
-		},
-		interval = 1.0,
-		chance = 1,
-		action = function(pos, node, active_object_count, active_object_count_wider)
-			--local uppos = vector.offset(pos, 0, 1, 0)
-			local downpos = vector.offset(pos, 0, -1, 0)
-
-			local downnode = minetest.get_node(downpos)
-
-			---@type integer|string|nil
-			local level = composter_level(downnode)
-
-			--Consume compostable items and update composter below
-			if level then
-				local meta = minetest.get_meta(pos)
-				local inv = meta:get_inventory()
-
-				for i = 1, 5 do
-					local stack = inv:get_stack("main", i)
-					local compchance = minetest.get_item_group(stack:get_name(), "compostability")
-
-					if compchance > 0 then
-						stack:take_item()
-						inv:set_stack("main", i, stack)
-
-						if compchance >= math.random(0, 100) then
-							mcl_dye.add_bone_meal_particle(vector.offset(downpos, 0, level / 8, 0))
-							if level < 7 then
-								level = level + 1
-							else
-								level = "ready"
-							end
-							minetest.swap_node(downpos, {name = "mcl_composters:composter_" .. level})
-						end
-						break
-					end
-				end
-			end
-		end,
-	})
-end
-
 minetest.register_craft({
 	output = "mcl_hoppers:hopper",
 	recipe = {

mods/ITEMS/mcl_itemframes/item_frames_API.lua

@@ -638,7 +638,7 @@ function mcl_itemframes.create_base_definitions()
 		paramtype = "light",
 		paramtype2 = "facedir",
 		sunlight_propagates = true,
-		groups = { dig_immediate = 3, deco_block = 1, dig_by_piston = 1, container = 7, }, -- attached_node_facedir = 1 }, -- allows for more placement options.
+		groups = { dig_immediate = 3, deco_block = 1, dig_by_piston = 1, container = 1, }, -- attached_node_facedir = 1 }, -- allows for more placement options.
 		sounds = mcl_sounds.node_sound_defaults(),
 		node_placement_prediction = "",
 

mods/ITEMS/mcl_jukebox/init.lua

@@ -121,7 +121,7 @@ minetest.register_node("mcl_jukebox:jukebox", {
 	_doc_items_usagehelp = S("Place a music disc into an empty jukebox to insert the music disc and play music. If the jukebox already has a music disc, you will retrieve this music disc first. The music can only be heard by you, not by other players."),
 	tiles = {"mcl_jukebox_top.png", "mcl_jukebox_side.png", "mcl_jukebox_side.png"},
 	sounds = mcl_sounds.node_sound_wood_defaults(),
-	groups = {handy=1,axey=1, container=7, deco_block=1, material_wood=1, flammable=-1},
+	groups = {handy=1,axey=1, container=1, deco_block=1, material_wood=1, flammable=-1},
 	is_ground_content = false,
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)

mods/ITEMS/mcl_potions/init.lua

@@ -256,7 +256,7 @@ minetest.register_craftitem("mcl_potions:water", {
 	stack_max = 1,
 	inventory_image = potion_image("#0022FF"),
 	wield_image = potion_image("#0022FF"),
-	groups = {brewitem=1, food=3, can_eat_when_full=1, water_bottle=1},
+	groups = {brewitem=1, food=3, can_eat_when_full=1, water_bottle=1, bottle=1},
 	on_place = water_bottle_on_place,
 	_on_dispense = dispense_water_bottle,
 	_dispense_into_walkable = true,
@@ -273,7 +273,7 @@ minetest.register_craftitem("mcl_potions:river_water", {
 	stack_max = 1,
 	inventory_image = potion_image("#0044FF"),
 	wield_image = potion_image("#0044FF"),
-	groups = {brewitem=1, food=3, can_eat_when_full=1, water_bottle=1},
+	groups = {brewitem=1, food=3, can_eat_when_full=1, water_bottle=1, bottle=1},
 	on_place = water_bottle_on_place,
 	_on_dispense = dispense_water_bottle,
 	_dispense_into_walkable = true,

mods/ITEMS/mcl_potions/lingering.lua

@@ -102,7 +102,7 @@ function mcl_potions.register_lingering(name, descr, color, def)
 		_doc_items_longdesc = longdesc,
 		_doc_items_usagehelp = S("Use the “Punch” key to throw it."),
 		inventory_image = lingering_image(color),
-		groups = {brewitem=1, not_in_creative_inventory=0},
+		groups = {brewitem=1, not_in_creative_inventory=0, bottle=1},
 		on_use = function(item, placer, pointed_thing)
 			local velocity = 10
 			local dir = placer:get_look_dir();

mods/ITEMS/mcl_potions/potions.lua

@@ -163,7 +163,7 @@ local function register_potion(def)
 		stack_max = def.stack_max or 1,
 		inventory_image = def.image or potion_image(def.color),
 		wield_image = def.image or potion_image(def.color),
-		groups = def.groups or {brewitem=1, food=3, can_eat_when_full=1 },
+		groups = def.groups or {brewitem=1, food=3, can_eat_when_full=1, bottle=1},
 		on_place = on_use,
 		on_secondary_use = on_use,
 	})
@@ -260,7 +260,7 @@ local function register_potion(def)
 			stack_max = def.stack_max or 1,
 			inventory_image = def.image or potion_image(def.color),
 			wield_image = def.image or potion_image(def.color),
-			groups = def.groups or {brewitem=1, food=3, can_eat_when_full=1},
+			groups = def.groups or {brewitem=1, food=3, can_eat_when_full=1, bottle=1},
 			on_place = on_use,
 			on_secondary_use = on_use,
 		})
@@ -343,7 +343,7 @@ local function register_potion(def)
 			stack_max = 1,
 			inventory_image = def.image or potion_image(def.color),
 			wield_image = def.image or potion_image(def.color),
-			groups = def.groups or {brewitem=1, food=3, can_eat_when_full=1},
+			groups = def.groups or {brewitem=1, food=3, can_eat_when_full=1, bottle=1},
 			on_place = on_use,
 			on_secondary_use = on_use,
 		})
@@ -411,7 +411,7 @@ local awkward_def = {
 	_tt = S("No effect"),
 	_longdesc = S("Has an awkward taste and is used for brewing potions."),
 	color = "#0000FF",
-	groups = {brewitem=1, food=3, can_eat_when_full=1},
+	groups = {brewitem=1, food=3, can_eat_when_full=1, bottle=1},
 	on_use = minetest.item_eat(0, "mcl_potions:glass_bottle"),
 }
 
@@ -450,7 +450,7 @@ local dragon_breath_def = {
 	no_effect = true,
 	_longdesc = S("This item is used in brewing and can be combined with splash potions to create lingering potions."),
 	image = "mcl_potions_dragon_breath.png",
-	groups = { brewitem = 1 },
+	groups = { brewitem = 1, bottle = 1 },
 	on_use = nil,
 	stack_max = 64,
 }

mods/ITEMS/mcl_potions/splash.lua

@@ -26,7 +26,7 @@ function mcl_potions.register_splash(name, descr, color, def)
 		_doc_items_longdesc = longdesc,
 		_doc_items_usagehelp = S("Use the “Punch” key to throw it."),
 		inventory_image = splash_image(color),
-		groups = {brewitem=1, not_in_creative_inventory=0},
+		groups = {brewitem=1, not_in_creative_inventory=0, bottle=1},
 		on_use = function(item, placer, pointed_thing)
 			local velocity = 10
 			local dir = placer:get_look_dir();

mods/ITEMS/mcl_smoker/init.lua

@@ -453,7 +453,7 @@ minetest.register_node("mcl_smoker:smoker", {
 		"smoker_side.png", "smoker_front.png"
 	},
 	paramtype2 = "facedir",
-	groups = { pickaxey = 1, container = 4, deco_block = 1, material_stone = 1 },
+	groups = { pickaxey = 1, container = 2, deco_block = 1, material_stone = 1 },
 	is_ground_content = false,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 
@@ -519,6 +519,11 @@ minetest.register_node("mcl_smoker:smoker", {
 	_mcl_blast_resistance = 3.5,
 	_mcl_hardness = 3.5,
 	on_rotate = on_rotate,
+	_mcl_hoppers_on_try_pull = mcl_furnaces.hoppers_on_try_pull,
+	_mcl_hoppers_on_try_push = mcl_furnaces.hoppers_on_try_push,
+	_mcl_hoppers_on_after_push = function(pos)
+		minetest.get_node_timer(pos):start(1.0)
+	end,
 })
 
 minetest.register_node("mcl_smoker:smoker_active", {
@@ -536,7 +541,7 @@ minetest.register_node("mcl_smoker:smoker_active", {
 	paramtype = "light",
 	light_source = LIGHT_ACTIVE_FURNACE,
 	drop = "mcl_smoker:smoker",
-	groups = { pickaxey = 1, container = 4, deco_block = 1, not_in_creative_inventory = 1, material_stone = 1 },
+	groups = { pickaxey = 1, container = 2, deco_block = 1, not_in_creative_inventory = 1, material_stone = 1 },
 	is_ground_content = false,
 	sounds = mcl_sounds.node_sound_stone_defaults(),
 	on_timer = smoker_node_timer,
@@ -579,6 +584,8 @@ minetest.register_node("mcl_smoker:smoker_active", {
 	_mcl_hardness = 3.5,
 	on_rotate = on_rotate,
 	after_rotate = after_rotate_active,
+	_mcl_hoppers_on_try_pull = mcl_furnaces.hoppers_on_try_pull,
+	_mcl_hoppers_on_try_push = mcl_furnaces.hoppers_on_try_push,
 })
 
 minetest.register_craft({