Extract side API functions to separate file

api.lua

@@ -16,32 +16,6 @@
 
 local S=minetest.get_translator("industrialtest")
 
--- \brief Takes rotated node and side and outputs normalized side that can be used for ioConfig lookups
--- \param pos Vector with node position
--- \param side Node side. See industrialtest.api.addPowerStorage for possible values
--- \returns Normalized side or in case of failure side argument back
-industrialtest.api.normalizeSide=function(pos,side)
-	local node=minetest.get_node(pos)
-	-- FIXME: improve code quality there
-	local translation={
-		[0]={
-			1,2,3,4,5,6
-		},
-		[1]={
-			5,6,3,4,2,1
-		},
-		[2]={
-			2,1,3,4,6,5
-		},
-		[3]={
-			6,5,3,4,1,2
-		}
-	}
-	if node.param2>3 then
-		return side
-	end
-	return translation[node.param2][side]
-end
 -- \brief Sets uses metadata value depending on item's definition
 -- \param itemstack ItemStack which should be altered
 -- \returns true if value was successfully added, false otherwise
@@ -430,12 +404,6 @@ industrialtest.api.getNetwork=function(meta)
 	return minetest.deserialize(meta:get_string("industrialtest.network"))
 end
 
--- \brief Returns opposite side of provided one
--- \param side Side number. See industrialtest.api.addPowerStorage for order
--- \returns Opposite side
-industrialtest.api.getOppositeSide=function(side)
-	return (side%2==0 and side-1 or side+1)
-end
 -- \brief Returns connections of node with power storage. If direction is "i" only input connections will be returned, if direction is "o" only output connections
 --        will be returned, if it's not provided all connections will be returned.
 -- \param pos Vector