books, setcode, can listen to chat

commands.lua

@@ -13,16 +13,19 @@ local function pos_in_dir(obj, dir) -- position after we move in specified direc
 		elseif dir == 3 then
 		elseif dir == 4 then
 			yaw = yaw+pi;
-		elseif dir ==  5 then
+		elseif dir ==  5 then -- up
 			pos.y=pos.y+1
-		elseif dir ==  6 then
+		elseif dir ==  6 then -- down
+			pos.y=pos.y-1
+		elseif dir ==  7 then -- forward, down
 			pos.y=pos.y-1
 	end
 	
-	if dir<5 then
+	if dir<5 or dir == 7 then -- left, right, back
 		pos.x = pos.x+math.cos(yaw)
 		pos.z = pos.z+math.sin(yaw)
 	end
+	
 	return pos
 end
 
@@ -30,14 +33,27 @@ basic_robot.commands.move = function(name,dir)
 	local obj = basic_robot.data[name].obj;
 	local pos = pos_in_dir(obj, dir)
 	
-	if minetest.get_node(pos).name ~= "air" then return end
+	-- can move through walkable nodes
+	if minetest.registered_nodes[minetest.get_node(pos).name].walkable then return end
 	-- up; no levitation!
 	if minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z}).name == "air" and
 		minetest.get_node({x=pos.x,y=pos.y-2,z=pos.z}).name == "air" then 
-		return 
+		return false
 	end
 
 	obj:moveto(pos, true)
+	
+	-- sit and stand up for model - doenst work for overwriten obj export
+	-- if dir == 5 then-- up
+		-- obj:set_animation({x=0,y=0})
+	-- elseif dir == 6 then -- down
+		-- obj:set_animation({x=81,y=160})
+	-- end
+	
+	
+	
+	
+	return true
 end
 
 basic_robot.commands.turn = function (name, angle)
@@ -50,19 +66,91 @@ basic_robot.commands.dig = function(name,dir)
 	local obj = basic_robot.data[name].obj;
 	local pos = pos_in_dir(obj, dir)	
 	local luaent = obj:get_luaentity();
-	if minetest.is_protected(pos,luaent.owner ) then return end
+	if minetest.is_protected(pos,luaent.owner ) then return false end
 	
 	local nodename = minetest.get_node(pos).name;
-	if nodename == "air" then return end
+	if nodename == "air" then return false end
 	
 	local spos = obj:get_luaentity().spawnpos; 
 	local inv = minetest.get_meta(spos):get_inventory();
 	if not inv then return end
 	inv:add_item("main",ItemStack( nodename ));
 	
+	
+	--DS
+	local sounds = minetest.registered_nodes[minetest.get_node(pos).name].sounds
+	if sounds then
+		local sound = sounds.dug
+		if sound then
+			minetest.sound_play(sound,{object=obj, max_hear_distance = 10})
+		end
+	end
+	
 	minetest.set_node(pos,{name = "air"})
+	return true
 end
 
+
+basic_robot.commands.insert_item = function(name,item, inventory,dir)  
+	local obj = basic_robot.data[name].obj;
+	local tpos = pos_in_dir(obj, dir); -- position of target block
+	local luaent = obj:get_luaentity();
+	if minetest.is_protected(tpos,luaent.owner ) then return false end
+	
+		
+	local pos = basic_robot.data[name].spawnpos; -- position of spawner block
+	
+	local meta = minetest.get_meta(pos);
+	local tmeta = minetest.get_meta(tpos);
+	
+	local inv = minetest.get_meta(pos):get_inventory();
+	local tinv = minetest.get_meta(tpos):get_inventory();
+	
+	if not inventory then inventory = "main"; end
+	--if not inv then return end
+	local stack = ItemStack(item);
+	if (not inv:contains_item("main", stack) or not tinv:room_for_item(inventory, stack)) and meta:get_int("admin")~=1 then
+		return false 
+	end
+	
+	tinv:add_item(inventory,stack);
+	inv:remove_item("main", stack);
+
+	return true
+end
+
+basic_robot.commands.take_item = function(name,item, inventory,dir)  
+	local obj = basic_robot.data[name].obj;
+	local tpos = pos_in_dir(obj, dir); -- position of target block
+	local luaent = obj:get_luaentity();
+	if minetest.is_protected(tpos,luaent.owner ) then return false end
+	
+	
+	local pos = basic_robot.data[name].spawnpos; -- position of spawner block
+	
+	if basic_robot.bad_inventory_blocks[ minetest.get_node(tpos).name ] then return false end -- dont allow take from 
+	
+	local meta = minetest.get_meta(pos);
+	local tmeta = minetest.get_meta(tpos);
+	
+	local inv = minetest.get_meta(pos):get_inventory();
+	local tinv = minetest.get_meta(tpos):get_inventory();
+	
+	if not inventory then inventory = "main"; end
+	--if not inv then return end
+	local stack = ItemStack(item);
+	if (not tinv:contains_item(inventory, stack) or not inv:room_for_item("main", stack)) and meta:get_int("admin")~=1 then
+		return false 
+	end
+	
+	inv:add_item("main",stack);
+	tinv:remove_item(inventory, stack);
+
+	return true
+end
+
+
+
 basic_robot.commands.read_node = function(name,dir)
 	local obj = basic_robot.data[name].obj;
 	local pos = pos_in_dir(obj, dir)	
@@ -79,15 +167,74 @@ basic_robot.commands.place = function(name,nodename, dir)
 	local obj = basic_robot.data[name].obj;
 	local pos = pos_in_dir(obj, dir)	
 	local luaent = obj:get_luaentity();
-	if minetest.is_protected(pos,luaent.owner ) then return end
+	if minetest.is_protected(pos,luaent.owner ) then return false end
-	if minetest.get_node(pos).name~="air" then return end
+	if minetest.get_node(pos).name~="air" then return false end
 	
 	local spos = obj:get_luaentity().spawnpos; 
 	local meta = minetest.get_meta(spos);
 	local inv = meta:get_inventory();
-	if not inv then return end
+	if not inv then return false end
 	if not inv:contains_item("main", ItemStack(nodename)) and meta:get_int("admin")~=1 then return end
 	inv:remove_item("main", ItemStack(nodename));	
 	
+	--DS
+	local sounds = minetest.registered_nodes[nodename].sounds
+	if sounds then
+		local sound = sounds.place
+		if sound then
+			minetest.sound_play(sound,{object=obj, max_hear_distance = 10})
+		end
+	end
+	
 	minetest.set_node(pos,{name = nodename})
+	return true
 end
+
+basic_robot.commands.attack = function(name, target) -- attack range 4, damage 5
+	
+	local reach = 4;
+	local damage = 5;
+	
+	local tplayer = minetest.get_player_by_name(target);
+	if not tplayer then return false end
+	local obj = basic_robot.data[name].obj;
+	local pos = obj:getpos();
+	local tpos = tplayer:getpos();
+	
+	if math.abs(pos.x-tpos.x)> reach or math.abs(pos.y-tpos.y)> reach or math.abs(pos.z-tpos.z)> reach then
+		return false
+	end
+	tplayer:set_hp(tplayer:get_hp()-damage)
+	return true
+	
+end
+
+
+basic_robot.commands.read_book = function (itemstack) -- itemstack should contain book
+	local data = minetest.deserialize(itemstack:get_metadata())
+	if data then
+		return data.text;
+	else 
+		return nil
+	end
+end
+
+basic_robot.commands.write_book = function(name,text) -- returns itemstack containing book
+	
+	local lpp = 14;
+	local new_stack = ItemStack("default:book_written")
+	local data = {} 
+	
+	data.title = "program book"
+	data.text = text
+	data.text_len = #data.text
+	data.page = 1
+	data.page_max = math.ceil((#data.text:gsub("[^\n]", "") + 1) / lpp)
+	data.owner = name
+	local data_str = minetest.serialize(data)
+	
+	new_stack:set_metadata(data_str);
+	return new_stack;	
+	
+end
+

init.lua

@@ -3,8 +3,15 @@
 
 basic_robot = {};
 basic_robot.call_limit = 32; -- how many execution calls per script execution allowed
+basic_robot.bad_inventory_blocks = {
+	["craft_guide:sign_wall"] = true,
+}
+
+
 
 basic_robot.data = {}; 
+basic_robot.data.listening = {}; -- which robots listen to chat
+
 --[[
 [name] = {sandbox= .., bytecode = ..., ram = ..., obj = robot object,spawnpos=...} 
 robot object = object of entity, used to manipulate movements and more
@@ -37,33 +44,65 @@ function getSandboxEnv (name)
 		},
 		
 		dig = {
-			left = function() commands.dig(name,1) end,
+			left = function() return commands.dig(name,1) end,
-			right = function() commands.dig(name,2) end,
+			right = function() return commands.dig(name,2) end,
-			forward = function() commands.dig(name,3) end,
+			forward = function() return commands.dig(name,3) end,
-			backward = function() commands.dig(name,4) end,
+			backward = function() return commands.dig(name,4) end,
-			down = function() commands.dig(name,6) end,
+			down = function() return commands.dig(name,6) end,
-			up = function() commands.dig(name,5) end,
+			up = function() return commands.dig(name,5) end,
+			forward_down = function() return commands.dig(name,7) end,
 		},
 		
 		place = {
-			left = function(nodename) commands.place(name,nodename, 1) end,
+			left = function(nodename) return commands.place(name,nodename, 1) end,
-			right = function(nodename) commands.place(name,nodename, 2) end,
+			right = function(nodename) return commands.place(name,nodename, 2) end,
-			forward = function(nodename) commands.place(name,nodename, 3) end,
+			forward = function(nodename) return commands.place(name,nodename, 3) end,
-			backward = function(nodename) commands.place(name,nodename, 4) end,
+			backward = function(nodename) return commands.place(name,nodename, 4) end,
-			down = function(nodename) commands.place(name,nodename, 6) end,
+			down = function(nodename) return commands.place(name,nodename, 6) end,
-			up = function(nodename) commands.place(name,nodename, 5) end,
+			up = function(nodename) return commands.place(name,nodename, 5) end,
+			forward_down = function(nodename) return commands.place(name,nodename, 7) end,
 		},
 		
-		insert = { -- insert item from inventory into another inventory TODO
+		insert = { -- insert item from robot inventory into another inventory
-			forward = function(item, inventory) robot_insert(name,item, inventory,1) end,
+			left = function(item, inventory) commands.insert_item(name,item, inventory,1) end,
-			backward = function(item, inventory) robot_insert(name,item, inventory,2) end,
+			right = function(item, inventory) commands.insert_item(name,item, inventory,2) end,
-			down = function(item, inventory) robot_insert(name,item, inventory,3) end,
+			forward = function(item, inventory) commands.insert_item(name,item, inventory,3) end,
-			up = function(item, inventory) robot_insert(name,item, inventory,4) end,
+			backward = function(item, inventory) commands.insert_item(name,item, inventory,4) end,
+			down = function(item, inventory) commands.insert_item(name,item, inventory,6) end,
+			up = function(item, inventory) commands.insert_item(name,item, inventory,5) end,
 		},
 		
-		take = {}, -- take item from inventory TODO
+		take = { -- takes item from inventory and puts it in robot inventory
+			left = function(item, inventory) commands.take_item(name,item, inventory,1) end,
+			right = function(item, inventory) commands.take_item(name,item, inventory,2) end,
+			forward = function(item, inventory) commands.take_item(name,item, inventory,3) end,
+			backward = function(item, inventory) commands.take_item(name,item, inventory,4) end,
+			down = function(item, inventory) commands.take_item(name,item, inventory,6) end,
+			up = function(item, inventory) commands.take_item(name,item, inventory,5) end,
 		
-		selfpos = function() return basic_robot.data[name].obj:getpos() end,
+		}, -- take item from inventory TODO
+
+		self = {
+			pos = function() return basic_robot.data[name].obj:getpos() end,
+			spawnpos = function() return basic_robot.data[name].spawnpos end,
+			viewdir = function() local yaw = basic_robot.data[name].obj:getyaw(); return {x=math.cos(yaw), y = 0, z=math.sin(yaw)} end,
+			
+			listen = function (mode)
+				if mode == 1 then 
+					basic_robot.data.listening[name] = true
+				else
+					basic_robot.data.listening[name] = nil
+				end
+			end,
+			
+			spam = function (mode) -- allow more than one msg per "say"
+				if mode == 1 then 
+					basic_robot.data[name].allow_spam = true
+				else
+					basic_robot.data[name].allow_spam = nil
+				end
+			end,
+		},
 		
 		find_nodes = 
 			function(nodename,r) 
@@ -71,6 +110,25 @@ function getSandboxEnv (name)
 				return (minetest.find_node_near(basic_robot.data[name].obj:getpos(), r, nodename)~=nil)
 			end, -- in radius around position
 		
+		find_player = 
+			function(r) 
+				if r>8 then return false end
+				local objects =  minetest.get_objects_inside_radius(basic_robot.data[name].obj:getpos(), r);
+				for _,obj in pairs(objects) do
+					if obj:is_player() then return obj:get_player_name() end
+				end
+				return false
+			end, -- in radius around position
+		
+		player = {
+			getpos = function(name) 
+				local player = minetest.get_player_by_name(name); 
+				if player then return player:getpos() else return nil end 
+			end,
+			
+		},
+		
+		attack = function(target) return basic_robot.commands.attack(name,target) end, -- attack player if nearby
 		
 		read_node = { -- returns node name
 			left = function() return commands.read_node(name,1) end,
@@ -79,6 +137,7 @@ function getSandboxEnv (name)
 			backward = function() return commands.read_node(name,4) end,
 			down = function() return commands.read_node(name,6) end,
 			up = function() return commands.read_node(name,5) end,
+			forward_down = function() return commands.read_node(name,7) end,
 		},
 		
 		read_text = { -- returns node name
@@ -90,10 +149,76 @@ function getSandboxEnv (name)
 			up = function() return commands.read_text(name,5) end,
 		},
 		
-		say  = function(text)
+		say = function(text)
-			minetest.chat_send_all("<robot ".. name .. "> " .. text)
+			if not basic_robot.data[name].quiet_mode then
+				minetest.chat_send_all("<robot ".. name .. "> " .. text)
+				if not basic_robot.data[name].allow_spam then 
+					basic_robot.data[name].quiet_mode=true
+				end
+			else
+				minetest.chat_send_player(name,"<robot ".. name .. "> " .. text)
+			end
 		end,
 		
+		listen_msg = function() 
+			local msg = basic_robot.data[name].listen_msg;
+			local speaker = basic_robot.data[name].listen_speaker;
+			basic_robot.data[name].listen_msg = nil; 
+			basic_robot.data[name].listen_speaker = nil; 
+			return speaker,msg
+		end,
+		
+		fire = function(speed, pitch,gravity) -- experimental: fires an projectile
+			local obj = basic_robot.data[name].obj;
+			local pos = obj:getpos();
+			local yaw = obj:getyaw();
+			-- fire particle
+			minetest.add_particle(
+			{
+			pos = pos,
+			expirationtime = 10,
+			velocity = {x=speed*math.cos(yaw)*math.cos(pitch), y=speed*math.sin(pitch),z=speed*math.sin(yaw)*math.cos(pitch)},
+			size = 5,
+			texture = "default_apple.png",
+			acceleration = {x=0,y=-gravity,z=0},
+			collisiondetection = true,
+			collision_removal = true,			
+			}
+			);
+		end,
+		
+		book = {
+			read = function(i) 
+				if i<=0 or i > 32 then return nil end
+				local inv = minetest.get_meta(basic_robot.data[name].spawnpos):get_inventory();
+				local itemstack = inv:get_stack("library", i);
+				if itemstack then
+					return commands.read_book(itemstack);
+				else 
+					return nil
+				end
+			end,
+			
+			write = function(i,text)
+				if i<=0 or i > 32 then return nil end
+				local inv = minetest.get_meta(basic_robot.data[name].spawnpos):get_inventory();
+				local stack = basic_robot.commands.write_book(name,text);
+				if stack then inv:set_stack("library", i, stack) end
+			end
+		},
+		
+		code = {
+			set = function(text) -- replace bytecode in sandbox with this
+				local err = commands.setCode( name, text ); -- compile code
+				if err then
+					minetest.chat_send_player(name,"#ROBOT CODE COMPILATION ERROR : " .. err) 
+					local obj = basic_robot.data[name].obj;
+					obj:remove();
+					basic_robot.data[name].obj = nil;
+					return
+				end
+			end
+		},
 		
 		string = {
 			byte = string.byte,	char = string.char,
@@ -133,6 +258,10 @@ function getSandboxEnv (name)
 			time = os.time,
 			
 		},
+		
+		tonumber = tonumber,
+		pairs = pairs,
+		ipairs = ipairs,
 		error = error,
 		debug = debug,
 		
@@ -241,6 +370,7 @@ local function setCode( name, script ) -- to run script: 1. initSandbox 2. setCo
 	return nil
 end
 
+basic_robot.commands.setCode=setCode; -- so we can use it
 
 local function runSandbox( name)
     
@@ -283,22 +413,23 @@ local robot_spawner_update_form = function (pos, mode)
 	
 	if mode ~= 1 then 
 		form  = 
-		"size[8,6]" ..  -- width, height
+		"size[9.5,6]" ..  -- width, height
-		"textarea[0.1,0.75;8.4,6.5;code;code;".. code.."]"..
+		"textarea[1.25,-0.25;8.75,7.6;code;;".. code.."]"..
-		"button_exit[-0.25,-0.25;1.5,1;spawn;START]"..
+		"button_exit[-0.25,-0.25;1.25,1;OK;SAVE]"..
-		"button[1.25,-0.25;1.5,1;despawn;STOP]"..
+		"button_exit[-0.25, 0.75;1.25,1;spawn;START]"..
-		"button[2.75,-0.25;1.5,1;inventory;inventory]"..
+		     "button[-0.25, 1.75;1.25,1;despawn;STOP]"..
-		"button[5.25,-0.25;1,1;help;help]"..
+			 "button[-0.25, 3.6;1.25,1;inventory;storage]"..
-		"button_exit[6.25,-0.25;1,1;reset;CLEAR]"..
+		     "button[-0.25, 4.6;1.25,1;library;library]"..
-		"button_exit[7.25,-0.25;1,1;OK;SAVE]";
+		     "button[-0.25, 5.6;1.25,1;help;help]";
 	else
 		form  = 
-		"size[8,6]" ..  -- width, height
+		"size[9.5,6]" ..  -- width, height
-		"textarea[0.1,0.75;8.4,6.5;code;code;".. code.."]"..
+		"textarea[1.25,-0.25;8.75,7.6;code;;".. code.."]"..
-		"button[1.25,-0.25;1.5,1;despawn;STOP]"..
+		"button_exit[-0.25,-0.25;1.25,1;OK;SAVE]"..
-		"button[2.75,-0.25;1.5,1;inventory;inventory]"..
+		     "button[-0.25, 1.75;1.25,1;despawn;STOP]"..
-		"button[5.25,-0.25;1,1;help;help]"..
+			 "button[-0.25, 3.6;1.25,1;inventory;storage]"..
-		"button_exit[7.25,-0.25;1,1;OK;save]";
+		     "button[-0.25, 4.6;1.25,1;library;library]"..
+		     "button[-0.25, 5.6;1.25,1;help;help]";
 	end
 		
 	if mode ==1 then return form end
@@ -307,7 +438,12 @@ local robot_spawner_update_form = function (pos, mode)
 end
 
 local function init_robot(self)
+	
+	
 	basic_robot.data[self.owner].obj = self.object; -- BUG: some problems with functions using object later??
+	basic_robot.data.listening[self.owner] = nil -- dont listen at beginning
+	basic_robot.data[self.owner].quiet_mode = false;
+	
 	self.object:set_properties({infotext = "robot " .. self.owner});
 	self.object:set_properties({nametag = "robot " .. self.owner,nametag_color = "LawnGreen"});
 	self.object:set_armor_groups({fleshy=0})
@@ -324,8 +460,9 @@ minetest.register_entity("basic_robot:robot",{
 	timestep = 1, -- run every 1 second
 	spawnpos = nil,
 	--visual="mesh",
-	--mesh = "character.b3d",
+	--mesh = "char.obj", --this is good: aligned and rotated in blender - but how to move nametag up? now is stuck in head
 	--textures={"character.png"},
+	
 	visual="cube",
 	textures={"arrow.png","basic_machine_side.png","face.png","basic_machine_side.png","basic_machine_side.png","basic_machine_side.png"},
 	
@@ -517,15 +654,31 @@ local on_receive_robot_form = function(pos, formname, fields, sender)
 		
 		if fields.help then 
 			
-			local text =  "BASIC LUA SYNTAX\n \nif CONDITION then BLOCK1 else BLOCK2 end \nmyTable1 = {1,2,3},  myTable2 = {[\"entry1\"]=5, [\"entry2\"]=1}\n"..
+			local text =  "BASIC LUA SYNTAX\n \nif x==1 then do_something else do_something_else end"..
+			"\nfor i = 1, 5 do something end \nwhile i<6 do something; i=i+1; end\n"..
+			"\narrays: myTable1 = {1,2,3},  myTable2 = {[\"entry1\"]=5, [\"entry2\"]=1}\n"..
 			"access table entries with myTable1[1] or myTable2.entry1 or myTable2[\"entry1\"]\n"..
+			
 			"\nROBOT COMMANDS\n\n"..
-			"move.direction(), where direction is forward, backward, left,right, up, down\n"..
+			"**MOVEMENT,DIGGING,INVENTORT TAKE/INSERT\nmove.direction(), where direction is forward, backward, left,right, up, down)\n"..
+			"forward_down direction only works with dig, place and read_node\n"..
 			"turn.left(), turn.right(), turn.angle(45)\n"..
 			"dig.direction(), place.direction(\"default:dirt\")\nread_node.direction() tells you names of nodes\n"..
+			"insert.direction(item, inventory) inserts item from robot inventory to target inventory\n"..
+			"take.direction(item, inventory) takes item from target inventory into robot inventory\n"..
 			"read_text.direction() reads text of signs, chests and other blocks\n"..
+			"**BOOKS/CODE\nbook.read(i) returns contents of book at i-th position in library \nbook.write(i,text) writes book at i-th position\n"..
+			"code.set(text) replaces current bytecode of robot\n"..
 			"find_nodes(\"default:dirt\",3) is true if node can be found at radius 3 around robot, otherwise false\n"..
-			"selfpos() returns table {x=pos.x,y=pos.y,z=pos.z}\n"..
+			"find_player(3) finds player and returns his name in radius 3 around robot, if not returns false\n"..
+			"attack(target) attempts to attack target player if nearby \n"..
+			"self.pos() returns table {x=pos.x,y=pos.y,z=pos.z}\n"..
+			"self.spawnpos() returns position of spawner block\n"..
+			"self.viewdir() returns vector of view for robot\n"..
+			"self.listen(mode) (de)attaches chat listener to robot\n"..
+			"listen_msg() retrieves last chat message if robot listens\n"..
+			"player.getpos(name) return position of player, player.connected() returns list of players\n"..
+			"fire = function(speed, pitch,gravity) fires a projectile from robot\n"..
 			"say(\"hello\") will speak";
 			
 		
@@ -564,6 +717,15 @@ local on_receive_robot_form = function(pos, formname, fields, sender)
 			minetest.show_formspec(sender:get_player_name(), "robot_inventory", form);
 		end
 		
+		if fields.library then
+			local list_name = "nodemeta:"..pos.x..','..pos.y..','..pos.z ;
+			local form  = 
+			"size[8,8]" ..  -- width, height
+			"list["..list_name..";library;0.,0;8,4;]"..
+			"list[current_player;main;0,4.25;8,4;]";
+			minetest.show_formspec(sender:get_player_name(), "robot_inventory", form);
+		end
+		
 	end
 
 -- handle form when rightclicking robot entity
@@ -587,6 +749,17 @@ minetest.register_on_player_receive_fields(
 	end
 )
 
+-- handle chats
+minetest.register_on_chat_message(
+function(name, message)
+	local listeners = basic_robot.data.listening;
+	for pname,_ in pairs(listeners) do
+		basic_robot.data[pname].listen_msg = message;
+		basic_robot.data[pname].listen_speaker = name;
+	end
+end
+)
+
 
 minetest.register_node("basic_robot:spawner", {
 	description = "Spawns robot",
@@ -608,6 +781,7 @@ minetest.register_node("basic_robot:spawner", {
 
 		local inv = meta:get_inventory(); -- spawner inventory
 		inv:set_size("main",32);
+		inv:set_size("library",32);
 	end,
 
 	mesecons = {effector = {
@@ -638,7 +812,7 @@ minetest.register_node("basic_robot:spawner", {
 	can_dig = function(pos, player)
 		if minetest.is_protected(pos, player:get_player_name()) then return false end 
 		local meta = minetest.get_meta(pos);
-		if not meta:get_inventory():is_empty("main") then return false end
+		if not meta:get_inventory():is_empty("main") or not meta:get_inventory():is_empty("library") then return false end
 		return true
 	end