Prevent using items partially used by Rotary Macerator

api/registration.lua

@@ -272,8 +272,9 @@ end
 
 -- \brief Registers Rotary Macerator recipe modifier
 -- \param config table
+-- \param omitPlaceholder bool, for internal use only
 -- \returns nil
-function industrialtest.api.registerRotaryMaceratorModifier(config)
+function industrialtest.api.registerRotaryMaceratorModifier(config,omitPlaceholder)
 	local definition={
 		name=config.name or "",
 		modifier=config.modifier or "",
@@ -282,6 +283,19 @@ function industrialtest.api.registerRotaryMaceratorModifier(config)
 		uses=config.uses or 1,
 		modifierLeftover=config.modifierLeftover
 	}
+
+	if not omitPlaceholder and not config.modifierLeftover and string.len(definition.modifier)>0 then
+		local delimiter,_=string.find(definition.modifier,":")
+		definition.stackLeftover="industrialtest:"..string.sub(definition.modifier,1,delimiter-1).."_"..string.sub(definition.modifier,delimiter+1,-1).."_leftover"
+		industrialtest.api.registerRotaryMaceratorModifier({
+			name=definition.name,
+			modifier=definition.stackLeftover,
+			output=definition.output,
+			time=definition.time,
+			uses=definition.uses
+		},true)
+	end
+
 	industrialtest.api.rotaryMaceratorModifiers[definition.name.." "..config.modifier]=definition
 end
 
@@ -292,3 +306,18 @@ end
 function industrialtest.api.getRotaryMaceratorModifier(name,modifier)
 	return industrialtest.api.rotaryMaceratorModifiers[name.." "..modifier]
 end
+
+minetest.register_on_mods_loaded(function()
+	for _,def in pairs(industrialtest.api.rotaryMaceratorModifiers) do
+		if def.stackLeftover then
+			local leftoverDef=table.copy(minetest.registered_items[def.modifier])
+			leftoverDef.groups=leftoverDef.groups or {}
+			leftoverDef.groups.not_in_creative_inventory=1
+			if industrialtest.mclAvailable then
+				leftoverDef._doc_items_create_entry=false
+			end
+			-- Item name starts with : to prevent name checks, because it seems to fail in on_mods_loaded
+			minetest.register_craftitem(":"..def.stackLeftover,leftoverDef)
+		end
+	end
+end)

machines/rotary_macerator.lua

@@ -237,8 +237,11 @@ function industrialtest.RotaryMacerator.activeUpdate(self,pos,elapsed,meta,inv)
 			local modifierSlot=inv:get_stack("modifier",1)
 			local modifierMeta=modifierSlot:get_meta()
 			local uses=result.uses
+			local replace=false
 			if modifierMeta:contains("uses") then
 				uses=modifierMeta:get_int("uses")
+			else
+				replace=true
 			end
 			uses=math.max(uses-1,0)
 			if uses==0 then
@@ -250,7 +253,12 @@ function industrialtest.RotaryMacerator.activeUpdate(self,pos,elapsed,meta,inv)
 				uses=result.uses
 			end
 			if not modifierSlot:is_empty() and not result.modifierLeftover then
+				local modifierDef=modifierSlot:get_definition()
 				modifierMeta:set_int("uses",uses)
+				modifierMeta:set_string("description",string.format("%s (%s: %d)",modifierDef.description,S("Uses"),uses))
+			end
+			if replace then
+				modifierSlot:set_name(result.stackLeftover)
 			end
 			inv:set_stack("modifier",1,modifierSlot)
 		end