#!/usr/bin/python

# Prasenjeet Dutta, http://www.chaoszone.org/

# **************************************************************
# NOTE - this code no longer works, and is no longer necessary!
# Day by Day now has an excellent feed at:
# http://www.daybydaycartoon.com/atom.xml
# **************************************************************

# This synthesizes an RSS feed for Day by Day because
# Day by Day's main feed doesn't include the comics images.
#
# each permalink is like http://www.daybydaycartoon.com/?CartoonDate=7/25/2005
# each image url is like http://www.daybydaycartoon.com/Cartoons/07-24-2005.gif

import urllib, re
from xml.dom import minidom
from time import time, gmtime, strftime

def GetImageDatesFromFeed ():
    ctr = 0
    datelist = []
    linkPattern = re.compile(r'CartoonDate=(\d?\d)/(\d?\d)/(\d{4})')
    dbdRssUrl = urllib.urlopen('http://feeds.feedburner.com/dbdrepub')

    rss = minidom.parse(dbdRssUrl)
    permalinks = rss.getElementsByTagName('link')

    for permalink in permalinks:
        permalinkUrl = permalink.childNodes[0].toxml()
        if type(linkPattern.search(permalinkUrl)) == type(None):
            # if ctr != 0:
            #    print 'Regex Error, permalinkUrl was: ' + permalinkUrl
            pass
        else:
            reMatches = linkPattern.search(permalinkUrl).groups()
            datelist.append((reMatches[0], reMatches[1], reMatches[2]))
        ctr += 1
    return datelist

def RssHeader ():
    print """<?xml version="1.0" encoding="utf-8" ?>
    <rss version="2.0">
        <channel>
            <title>Day By Day by Chris Muir</title>
            <description>Follow Sam, Zed, Jan, and Damon as they take life 'day by day'</description>
            <link>http://www.daybydaycartoon.com</link>
    """

def RssBody (datelist):
    for dateTuple in datelist:
        print """
            <item>
            <title>%(day)s/%(month)s/%(year)s</title>
            <description><![CDATA[ <img src="http://www.daybydaycartoon.com/Cartoons/%(iday)02d-%(imonth)02d-%(year)s.gif" alt="Day by Day Cartoon" /> ]]></description>
            <link>http://www.daybydaycartoon.com/?CartoonDate=%(day)s/%(month)s/%(year)s</link>
            </item>""" % { 'day':dateTuple[0], 'month':dateTuple[1], 'year':dateTuple[2], 'iday':int(dateTuple[0]), 'imonth':int(dateTuple[1]) }

def RssFooter ():
    print "</channel></rss>"

def ExpiryTime ():
    # content expires 12 hours from now
    return strftime("%a, %d %b %Y %H:%M:%S UTC", gmtime(time() + 43200))

def Main ():
    print "Content-Type: application/rss+xml"
    print "Expires: " + ExpiryTime() + "\n"
    RssHeader()
    RssBody(GetImageDatesFromFeed())
    RssFooter()

if __name__ == '__main__':
    Main()