Create fluid utility functions in API

api/fluid.lua

@@ -45,6 +45,36 @@ function industrialtest.api.itemHasFluidStorage(itemstack)
 	return true
 end
 
+-- \brief Check if fluid storage in meta is full
+-- \param meta MetaDataRef
+-- \returns bool
+function industrialtest.api.isFluidStorageFull(meta)
+	return meta:get_int("industrialtest.fluidAmount")>=meta:get_int("industrialtest.fluidCapacity")
+end
+
+-- \brief Check if item fluid storage is full
+-- \param itemstack ItemStack
+-- \returns bool
+function industrialtest.api.isItemFluidStorageFull(itemstack)
+	local meta=itemstack:get_meta()
+	return industrialtest.api.isFluidStorageFull(meta)
+end
+
+-- \brief Check if fluid storage in meta is empty
+-- \param meta MetaDataRef
+-- \returns bool
+function industrialtest.api.isFluidStorageEmpty(meta)
+	return meta:get_int("industrialtest.fluidAmount")==0
+end
+
+-- \brief Check if item fluid storage is empty
+-- \param itemstack ItemStack
+-- \returns bool
+function industrialtest.api.isItemFluidStorageEmpty(itemstack)
+	local meta=itemstack:get_meta()
+	return industrialtest.api.isFluidStorageEmpty(meta)
+end
+
 -- \brief Updates itemstack description and wear depending on contained fluid
 -- \param itemstack ItemStack
 -- \returns nil