Support for nodes customizing

Currently hard-coded only in mapping.lua. Some usefull mappings added, like usage of buckets instead of sources for liquids
As usual some small off-topic fixes

towntest_chest/init.lua

@@ -15,22 +15,25 @@ CHEST
 --the right value is depend on building size. If the building (or the not builded rest) can full imaginated (less blocks in building then c_npc_imagination) there is the full search potencial active
 local c_npc_imagination = 500
 
-
 -- expose api
 towntest_chest = {}
 
+-- debug. Used for debug messages. In production the function should be empty
+local dprint = function(...)
+-- debug print. Comment out the next line if you don't need debug out
+--	print(unpack(arg))
+end
+towntest_chest.dprint = dprint
+
 -- table of non playing characters
 towntest_chest.npc = {}
 
-
--- debug. Used for debug messages. In production the function should be empty
-local function dprint(...)
--- debug print. Comment out the next line if you don't need debug out
---	print(unpack(arg))
-end
-
 local modpath = minetest.get_modpath(minetest.get_current_modname())
 
+-- nodes mapping functions
+towntest_chest.mapping = {}
+dofile(modpath.."/".."mapping.lua")
+
 -- get worldedit parser load_schematic from worldedit mod
 dofile(modpath.."/".."worldedit-serialization.lua")
 
@@ -78,28 +81,34 @@ towntest_chest.mapnodes = function(node)
 	local node_chk = minetest.registered_items[node.name]
 
 	if not node_chk then
-		dprint("unknown node in building: "..node.name)
+		local fallbacknode = towntest_chest.mapping.unknown_nodes(node)
-		return nil
+		if fallbacknode then
-	else
+			return towntest_chest.mapnodes(fallbacknode)
-		-- known node. Check for price or if it is free
-		if (node_chk.groups.not_in_creative_inventory and not (node_chk.groups.not_in_creative_inventory == 0)) or
-		   (not node_chk.description or node_chk.description == "") then
-			if node_chk.drop then
-			-- use possible drop as payment
-				if type(node_chk.drop) == "table" then -- drop table
-					node.matname = node_chk.drop[1]  -- use the first one
-				else
-					node.matname = node_chk.drop
-				end
-			else --something not supported, but known
-				node.matname = "free" -- will be build for free. they are something like doors:hidden or second part of coffee lrfurn:coffeetable_back
-			end
-		else -- build for payment the 1:1
-			node.matname = node.name
 		end
-	end
+	else
+		-- known node Map them?
+		local customizednode = towntest_chest.mapping.customize(node)
+		if not customizednode.matname then --no matname override customizied.
 
-	return node
+			--Check for price or if it is free
+			if (node_chk.groups.not_in_creative_inventory and not (node_chk.groups.not_in_creative_inventory == 0)) or
+			   (not node_chk.description or node_chk.description == "") then
+				if node_chk.drop then
+				-- use possible drop as payment
+					if type(node_chk.drop) == "table" then -- drop table
+						customizednode.matname = node_chk.drop[1]  -- use the first one
+					else
+						customizednode.matname = node_chk.drop
+					end
+				else --something not supported, but known
+					customizednode.matname = "free" -- will be build for free. they are something like doors:hidden or second part of coffee lrfurn:coffeetable_back
+				end
+			else -- build for payment the 1:1
+				customizednode.matname = customizednode.name
+			end
+		end
+		return customizednode
+	end
 end
 
 
@@ -454,7 +463,8 @@ towntest_chest.build = function(chestpos)
 							end
 
 							-- create next chunk to be processed. only buildable items
-							if inv:contains_item("builder",v.matname.." 1") then
+							if inv:contains_item("builder",v.matname.." 1") or -- is in builder inventory
+							    (v.matname == "free" and next_plan[1]) then    -- or free, but builder inventory is not empty
 								table.insert(next_plan,v)
 							end
 

towntest_chest/mapping.lua

@@ -0,0 +1,67 @@
+local u = {}
+-- Fallback nodes replacement of  unknown nodes
+-- Maybe it is beter to use aliases for unknown notes. But anyway
+u["xpanes:pane_glass_10"] = { name = "xpanes:pane_10" }
+u["xpanes:pane_glass_5"]  = { name = "xpanes:pane_5" }
+u["beds:bed_top_blue"]    = { name = "beds:bed_top" }
+u["beds:bed_bottom_blue"] = { name = "beds:bed_bottom" }
+
+u["homedecor:table_lamp_max"] = { name = "homedecor:table_lamp_white_max" }
+u["homedecor:refrigerator"]   = { name = "homedecor:refrigerator_steel" }
+
+towntest_chest.mapping.unknown_nodes_data = u
+
+
+
+local c = {}
+--syntax sample. name and are matname optional.
+-- if name is missed it will not be changed.
+-- if matname is missed it will be determinated as usual (from changed name)
+-- the sample is: instead of cobble place goldblock, use wood as payment
+-- c["default:cobble"] = { name = "default:goldblock", matname = "default:wood" }
+
+c["beds:bed_top"] = { matname = "free" }  -- the bottom of the bed is payed
+
+-- it is hard to get a source in survival, so we use buckets. Note, the bucket is lost after them
+c["default:lava_source"]        = { matname = "bucket:bucket_lava" }
+c["default:river_water_source"] = { matname = "bucket:bucket_river_water" }
+c["default:water_source"]       = { matname = "bucket:bucket_water" }
+
+towntest_chest.mapping.customize_data = c
+
+
+
+-- Fallback nodes replacement of  unknown nodes
+-- Maybe it is beter to use aliases for unknown notes. But anyway
+-- TODO: should be editable in game trough a nice gui, to customize the building before build
+towntest_chest.mapping.unknown_nodes = function(node)
+
+	local map = towntest_chest.mapping.unknown_nodes_data[node.name]
+	if not map or map.name == node.name then -- no fallback mapping. don't use the node
+		towntest_chest.dprint("mapping failed:", node.name, dump(map))
+		return nil
+	end
+	towntest_chest.dprint("mapped", node.name, "to", map.name)
+	local mappednode = node
+	mappednode.name = map.name
+	return mappednode
+end
+
+
+-- Nodes replacement to customizie buildings
+-- TODO: should be editable in game trough a nice gui, to customize the building before build
+towntest_chest.mapping.customize = function(node)
+	local map = towntest_chest.mapping.customize_data[node.name]
+	if not map then -- no mapping. return unchanged
+		return node
+	end
+	towntest_chest.dprint("map", node.name, "to", map.name, map.matname)
+	local mappednode = node
+	if map.name then
+		mappednode.name = map.name
+	end
+	if map.matname then
+		mappednode.matname = map.matname
+	end
+	return mappednode
+end