move handlers into subdirectory to split them apart from the actual game content

homedecor/handlers/expansion.lua

@@ -0,0 +1,115 @@
+local S = homedecor.gettext
+
+-- selects which node was pointed at based on it being known, and either clickable or buildable_to
+local function select_node(pointed_thing)
+	local pos = pointed_thing.under
+	local def = minetest.registered_nodes[minetest.get_node(pos).name]
+
+	if not def or (not def.on_rightclick and not def.buildable_to) then
+		pos = pointed_thing.above
+		def = minetest.registered_nodes[minetest.get_node(pos).name]
+	end
+	return pos, def
+end
+
+-- abstract function checking if 2 given nodes can and may be build to a place
+local function is_buildable_to(placer_name, pos, def, pos2)
+	local def = def or minetest.registered_nodes[minetest.get_node(pos).name]
+	local def2 = minetest.registered_nodes[minetest.get_node(pos2).name]
+
+	return def and def.buildable_to and def2 and def2.buildable_to
+		and not minetest.is_protected(pos, placer_name)
+		and not minetest.is_protected(pos2, placer_name)
+end
+
+-- place one or two nodes if and only if both can be placed
+local function stack(itemstack, placer, fdir, pos, def, pos2, node1, node2)
+	local placer_name = placer:get_player_name() or ""
+	if is_buildable_to(placer_name, pos, def, pos2) then
+		local fdir = fdir or minetest.dir_to_facedir(placer:get_look_dir())
+		minetest.set_node(pos, { name = node1, param2 = fdir })
+		node2 = node2 or "air" -- this can be used to clear buildable_to nodes even though we are using a multinode mesh
+		minetest.set_node(pos2, { name = node2, param2 = (node2 ~= "air" and fdir) or nil })
+
+		-- temporary check if this is a locked node to set its infotext
+		local nodename = itemstack:get_name()
+		if string.find(nodename, "_locked") then
+			local meta = minetest.get_meta(pos)
+			meta:set_string("owner", placer_name)
+			meta:set_string("infotext", S("Locked %s (owned by %s)"):format(minetest.registered_nodes[nodename].infotext, placer_name))
+		end
+
+		if not homedecor.expect_infinite_stacks then
+			itemstack:take_item()
+			return itemstack
+		end
+	end
+end
+
+-- Stack one node above another
+-- leave the last argument nil if it's one 2m high node
+function homedecor.stack_vertically(itemstack, placer, pointed_thing, node1, node2)
+	local pos, def = select_node(pointed_thing)
+	if def.on_rightclick then
+		return def.on_rightclick(pointed_thing.under, minetest.get_node(pos), placer, itemstack)
+	end
+
+	local top_pos = { x=pos.x, y=pos.y+1, z=pos.z }
+
+	return stack(itemstack, placer, nil, pos, def, top_pos, node1, node2)
+end
+
+-- Stack one door node above another
+-- like  homedecor.stack_vertically but tests first if it was placed as a right wing, then uses node1_right and node2_right instead
+local fdir_to_left = {
+	{ -1,  0 },
+	{  0,  1 },
+	{  1,  0 },
+	{  0, -1 },
+}
+function homedecor.stack_wing(itemstack, placer, pointed_thing, node1, node2, node1_right, node2_right)
+	local pos, def = select_node(pointed_thing)
+	if def.on_rightclick then
+		return def.on_rightclick(pointed_thing.under, minetest.get_node(pos), placer, itemstack)
+	end
+
+	local forceright = placer:get_player_control()["sneak"]
+	local fdir = minetest.dir_to_facedir(placer:get_look_dir())
+
+	local is_right_wing = node1 == minetest.get_node({ x = pos.x + fdir_to_left[fdir+1][1], y=pos.y, z = pos.z + fdir_to_left[fdir+1][2] }).name
+	if forceright or is_right_wing then
+		node1, node2 = node1_right, node2_right
+	end
+
+	local top_pos = { x=pos.x, y=pos.y+1, z=pos.z }
+	return stack(itemstack, placer, fdir, pos, def, top_pos, node1, node2)
+end
+
+-- Place one node right of or behind another
+homedecor.fdir_to_right = {
+	{  1,  0 },
+	{  0, -1 },
+	{ -1,  0 },
+	{  0,  1 },
+}
+
+homedecor.fdir_to_fwd = {
+	{  0,  1 },
+	{  1,  0 },
+	{  0, -1 },
+	{ -1,  0 },
+}
+
+function homedecor.stack_sideways(itemstack, placer, pointed_thing, node1, node2, dir)
+	local pos, def = select_node(pointed_thing)
+	if def.on_rightclick then
+		return def.on_rightclick(pointed_thing.under, minetest.get_node(pos), placer, itemstack)
+	end
+
+	local fdir = minetest.dir_to_facedir(placer:get_look_dir())
+	local fdir_transform = dir and homedecor.fdir_to_right or homedecor.fdir_to_fwd
+
+	local pos2 = { x = pos.x + fdir_transform[fdir+1][1], y=pos.y, z = pos.z + fdir_transform[fdir+1][2] }
+
+	return stack(itemstack, placer, fdir, pos, def, pos2, node1, node2)
+end