#!/usr/bin/env python
# http://inamidst.com/whits/src/

import cgitb; cgitb.enable()
import sys, re, glob, time, datetime

r_tag = re.compile(r'<[^>]+>')
now = datetime.datetime.utcnow()
delta = datetime.timedelta(seconds=(3600 * 3))
format = open('src/format').read().rstrip('\r\n')

def process(month, post): 
   f = open(month)
   for line in f: 
      if line.startswith('<div class="post">'): 
         heading = r_tag.sub('', f.next().rstrip('\r\n'))
         date = datetime.datetime(*(time.strptime(heading, format)[0:6]))
         if (now - date) > delta: post.append(date)
      elif line.startswith('</div>') and post: 
         yield post
         post = []
      elif post: post.append(line)
   f.close()

def posts(): 
   for month in (fn for fn in reversed(sorted(glob.glob('*/*.html')))): 
      for post in reversed(list(process(month, []))): 
         yield post

def main(): 
   print 'Content-Type: application/atom+xml\n'
   sys.stdout.write(open('src/head.atom').read())
   template = open('src/post.atom').read()
   for post in __import__('itertools').islice(posts(), 20): 
      date, lines = post[0], post[1:]
      ivars = {'updated': date.strftime('%Y-%m-%dT%H:%M:%SZ'), 
               'date': date.strftime(format).rstrip(':.'),
               'post': date.strftime('%Y/%m#N%d%H%M'), 
               'content': ''.join(lines).replace(']]>', ']]>]]><![CDATA[')}
      result = template[:]
      for (key, value) in ivars.iteritems(): 
         result = result.replace('$' + key, value)
      print result
   print '</feed>'