#!/usr/bin/env python3
import collections

class FilterModule(object):
	def filters(self):
		return {
				'expand_nft_rules': self.expand_nft_rules
			}

	def expand_nft_rules(self, input_rules, rule_defaults):
		rules = []
		for rule_name in input_rules:
			rule = {
					'name': rule_name,
					'comment': rule_name,
				}
			for override in rule_defaults:
				rule.update(override)
			if not isinstance(input_rules[rule_name], collections.Mapping):
				rule['matches'] = input_rules[rule_name]
			else:
				rule.update(input_rules[rule_name])
			rules.append(rule)
		return rules