#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

"""
This is a module to contain Debian-specific commands.
"""

from baseplugin import *

import re
import gzip
import popen2
import random
import os.path
import urllib2
from itertools import imap, ifilter

import conf
import utils
import privmsgs
import callbacks


def configure(onStart, afterConnect, advanced):
    # This will be called by setup.py to configure this module.  onStart and
    # afterConnect are both lists.  Append to onStart the commands you would
    # like to be run when the bot is started; append to afterConnect the
    # commands you would like to be run when the bot has finished connecting.
    from questions import expect, anything, something, yn
    onStart.append('load Debian')
    if not utils.findBinaryInPath('zegrep'):
        if not advanced:
            print 'I can\'t find zegrep in your path.  This is necessary '
            print 'to run the debfile command.  I\'ll disable this command '
            print 'now.  When you get zegrep in your path, use the command '
            print '"enable debfile" to re-enable the command.'
            onStart.append('disable debfile')
        else:
            print 'I can\'t find zegrep in your path.  If you want to run the '
            print 'debfile command with any sort of expediency, you\'ll need '
            print 'it.  You can use a python equivalent, but it\'s about two '
            print 'orders of magnitude slower.  THIS MEANS IT WILL TAKE AGES '
            print 'TO RUN THIS COMMAND.  Don\'t do this.'
            if yn('Do you want to use a Python equivalent of zegrep?') == 'y':
                onStart.append('usepythonzegrep')
            else:
                print 'I\'ll disable debfile now.'
                onStart.append('disable debfile')

example = utils.wrapLines("""
<jemfinch> @list Debian
<supybot> debfile, debversion, usepythonzegrep
<jemfinch> @debversion python
<supybot> Total matches: 3, shown: 3.   python 2.1.3-3.2 (stable),  python 2.2.3-3 (testing),  python 2.3-4 (unstable)
<jemfinch> @debfile /usr/bin/python
<supybot> python/python, devel/crystalspace-dev, python/python1.5, python/python2.1, python/python2.1-popy, python/python2.2, python/python2.2-popy, python/python2.3, python/python2.3-popy, devel/sloccount, graphics/pythoncad, mail/pms
""")


class Debian(callbacks.Privmsg, PeriodicFileDownloader):
    threaded = True
    periodicFiles = {
        'Contents-i386.gz': ('ftp://ftp.us.debian.org/'
                             'debian/dists/unstable/Contents-i386.gz',
                             86400, None)
        }
    contents = os.path.join(conf.dataDir, 'Contents-i386.gz')
    def __init__(self):
        callbacks.Privmsg.__init__(self)
        PeriodicFileDownloader.__init__(self)
        self.usePythonZegrep = False

    def usepythonzegrep(self, irc, msg, args):
        """takes no arguments"""
        self.usePythonZegrep = not self.usePythonZegrep
        irc.reply(msg, conf.replySuccess)

    def debfile(self, irc, msg, args):
        self.getFile('Contents-i386.gz')
        # Make sure it's anchored, make sure it doesn't have a leading slash
        # (the filenames don't have leading slashes, and people may not know
        # that).
        regexp = privmsgs.getArgs(args).lstrip('^/')
        regexp = '^' + regexp
        try:
            r = re.compile(regexp, re.I)
        except re.error, e:
            irc.error(msg, e)
            return
        if self.usePythonZegrep:
            fd = gzip.open(self.contents)
            fd = ifilter(imap(lambda line: r.search(line), fd))
        (fd, _) = popen2.popen4(['zegrep', regexp, self.contents])
        packages = []
        for line in fd:
            try:
                (filename, package) = line[:-1].split()
                if filename == 'FILE':
                    # This is the last line before the actual files.
                    continue
            except ValueError: # Unpack list of wrong size.
                continue       # We've not gotten to the files yet.
            if r.search(filename):
                packages.extend(package.split(','))
            if len(packages) > 40:
                irc.error(msg, 'More than 40 results returned, ' \
                               'please be more specific.')
                return
        if len(packages) == 0:
            irc.reply(msg, 'I found no packages with that file.')
        else:
            irc.reply(msg, ircutils.privmsgPayload(packages, ', '))
                
    _debreflags = re.DOTALL | re.IGNORECASE
    _debpkgre = re.compile(r'<a.*>(.*?)</a>', _debreflags)
    _debbrre = re.compile(r'<td align="center">(\S+)\s*</?td>', _debreflags)
    _debtablere = re.compile(r'<table\s*[^>]*>(.*?)</table>', _debreflags)
    _debnumpkgsre = re.compile(r'out of total of (\d+)', _debreflags)
    _debBranches = ('stable', 'testing', 'unstable', 'experimental')
    def debversion(self, irc, msg, args):
        """<package name> [stable|testing|unstable|experimental]

        Returns the current version(s) of a Debian package in the given branch
        (if any, otherwise all available ones are displayed).
        """
        if args and args[-1] in self._debBranches:
            branch = args.pop()
        else:
            branch = 'all'
        if not args:
            irc.error(msg, 'You must give a package name.')
        responses = []
        numberOfPackages = 0
        for package in args:
            fd = urllib2.urlopen('http://packages.debian.org/cgi-bin/' \
                                 'search_packages.pl?' \
                                 'keywords=%s&searchon=names&' \
                                 'version=%s&release=all' % \
                                 (package, branch))
            html = fd.read()
            fd.close()
            m = self._debnumpkgsre.search(html)
            if m:
                numberOfPackages = m.group(1)
            m = self._debtablere.search(html)
            if m is None:
                responses.append('No package found for: %s (%s)' % \
                                 (package, branch))
            else:
                tableData = m.group(1)
                rows = tableData.split('</TR>')
                for row in rows:
                    pkgMatch = self._debpkgre.search(row)
                    brMatch = self._debbrre.search(row)
                    if pkgMatch and brMatch:
                        s = '%s (%s)' % (pkgMatch.group(1), brMatch.group(1))
                        responses.append(s)
        random.shuffle(responses)
        ircutils.shrinkList(responses, ', ', 400)
        s = 'Total matches: %s, shown: %s.  %s' % \
            (numberOfPackages, len(responses), ', '.join(responses))
        irc.reply(msg, s)


Class = Debian

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