Optimize some electric tools and fix Electric Saber not discharging after digging node

tools/electric_saber.lua

@@ -16,13 +16,25 @@
 
 local S=minetest.get_translator("industrialtest")
 
+local electricSaber={}
+
+electricSaber.afterUse=function(itemstack,config)
+	local meta=itemstack:get_meta()
+	industrialtest.api.addPowerToItem(itemstack,-20)
+	if meta:get_int("industrialtest.powerAmount")<20 then
+		itemstack:set_name("industrialtest:"..config.name)
+	end
+	return itemstack
+end
+
 local function registerElectricSaber(config)
 	local definition={
 		description=config.displayName,
 		inventory_image="industrialtest_"..config.name..".png",
 		_industrialtest_powerStorage=true,
 		_industrialtest_powerCapacity=10000,
-		_industrialtest_powerFlow=industrialtest.api.lvPowerFlow
+		_industrialtest_powerFlow=industrialtest.api.lvPowerFlow,
+		_industrialtest_inactiveName="industrialtest:"..config.name
 	}
 	if industrialtest.mtgAvailable then
 		definition.groups={
@@ -79,11 +91,12 @@ local function registerElectricSaber(config)
 		definition._mcl_diggroups.swordy_cobweb.speed=config.activeDigSpeed
 	end
 	definition.groups.not_in_creative_inventory=1
-	definition.after_use=function()
-		return nil
+	definition.after_use=function(itemstack)
+		return electricSaber.afterUse(itemstack,config)
 	end
 	minetest.register_tool("industrialtest:"..config.name.."_active",definition)
 	industrialtest.internal.registeredElectricSabers["industrialtest:"..config.name]=true
+	industrialtest.internal.registeredElectricSabers["industrialtest:"..config.name.."_active"]=true
 end
 local definition={
 	name="electric_saber",