A simple prototype script to parse the unrealircd ip.conf file.

parse_unreal_ips_conf.rb

#!/usr/bin/env ruby
#Simple mockup script for Chat4All to parse the UnrealIRCd ip.conf file which holds the 'ban ip'-blocks.
#LICENSE:
#Copyright 2010 Filip H.F. "FiXato" Slagter
#You may use this work without restrictions, as long as this notice is included.
#The work is provided "as is" without warranty of any kind, neither express nor implied.

# Get the lines from the Unreal ban ips.conf file. Strip leading and trailing whitespaces and repeated spaces.
# Compact so there are no empty lines / nil lines left in the array.
filepath = File.expand_path("~/script_resources/ips.conf")
lines = File.readlines(filepath).map{|l|
        l.strip!
        l = l.squeeze(' ')
        l == '' ? nil : l
}.compact

# Initialise the bans hash
bans = {}

# Go through all the lines and their index
lines.each_with_index do |line,idx|
        # Don't start parsing unless the line is the start of an Unreal ban ip block
        next unless line == "ban ip {";

        # The IP is the first line after the 'ban ip {' line. Strip the Unreal arguments
        ip = lines[idx+1].gsub('mask ','').gsub(';','');

        # The Unreal reason is the second line of the block. Also strip the Unreal arguments
        reason = lines[idx+2].gsub('reason "','').gsub('";','');

        # Check the line before the block. If it starts with a # then use that comment as a custom reason, otherwise leave the custom reason an empty string
        custom_reason = (lines[idx-1][0..0] == '#' ? lines[idx-1][1..-1].strip : '')

        # Construct a hash with the IP as key. Using the IP as key will prevent duplicate entries,
        # because if it encounters another block with the same IP, it will just overwrite the reason and custom reason.
        bans[ip] = {
                :ip => ip,
                :reason => reason,
                :custom_reason => custom_reason,
        }
end

# Write away the generated config file
File.open(File.expand_path("~/script_resources/parsed_ips.conf"),"w") do |f|
        bans.each do |key,hash|
                # Only print the custom reason if there is one
                f.puts '#%s' % hash[:custom_reason] if hash[:custom_reason].to_s.size > 0
                f.puts 'ban ip {'
                f.puts '        mask %s;' % hash[:ip]
                f.puts '        reason "%s";' % hash[:reason]
                f.puts '};'
                f.puts
        end
end