# $Id$
#
# Copyright (c) 2009 Nominet UK. All rights reserved.
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require 'rexml/document'
include REXML

module KASPAuditor
  class Parse
    def self.parse(path, zonelist_filename, kasp_filename, syslog)
      # We need to open [/etc/opendnssec/]conf.xml,
      #                 [/etc/opendnssec/]kasp.xml,
      #                 [/etc/opendnssec/]zonelist.xml
      #
      # The zonelist.xml specified the zones. It also specified the policy for
      # the zone.
      # The policy refers to a policy defined in kasp.xml, which specifies all
      # except for the salt.
      # The conf.xml specifies the signer working directory, as well as the syslog
      # So, we parse zonelist.xml. We should read the policy from there.
      # We should then read the kasp.xml file to find the policy of interest.
      # We also need to read SignerConfiguration, just so we know the salt.
      zones = []
      File.open((zonelist_filename.to_s+"").untaint, 'r') {|file|
        doc = REXML::Document.new(file)
        doc.elements.each("ZoneList/Zone") {|z|
          # First load the config files
          zone_name = z.attributes['name']
          policy = z.elements['Policy'].text

          config_file_loc = z.elements["SignerConfiguration"].text
          if (config_file_loc.index(File::SEPARATOR) != 0)
            config_file_loc = path + config_file_loc
          end

          # Now parse the config file
          begin
            config = Config.new(zone_name, kasp_filename, policy,
              config_file_loc, syslog)

            output_file_loc = z.elements["Adapters"].elements['Output'].elements["File"].text
            if (output_file_loc.index(File::SEPARATOR) != 0)
              output_file_loc = path + output_file_loc
            end
            zones.push([config, output_file_loc])
          rescue Config::ConfigLoadError => e
            msg = "Can't load #{zone_name} SignerConfiguration file (#{config_file_loc}) : #{e}"
            print msg+"\n"
            syslog.log(LOG_ERR, msg)
          end
        }
      }
      return zones
    end
  end
end