#!/usr/bin/ruby

require 'gdbm'

dbfile = ARGV.shift
raise "usage: #$0 dbfile [input ...]" unless dbfile
GDBM.open(dbfile) {|db|
  for line in ARGF
    cccc, iata, lat, lon, name = line.chomp.split(/\t/)
    r = Hash[*db[cccc].to_s.split(/\t/).map{|s| s.split(/:/, 2)}.flatten]
    r['ia2'] = iata unless iata.empty?
    r['la2'] = lat
    r['lo2'] = lon
    r['sn2'] = name
    STDOUT.write "[#{cccc}]"
    db[cccc] = r.to_a.sort.map{|kv| kv.join(':')}.join("\t")
  end
  puts '.'
}