#!/usr/bin/env python2.3

import glob, os, time
from gnosis.xml.objectify import make_instance, tagname, dumps
day = 60*60*24
recent = time.time()-(90*day)

header = '''<?xml version="1.0" encoding="ISO-8859-1"?>
<rdf:RDF
  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  xmlns="http://purl.org/rss/1.0/"

  <channel rdf:about="http://gnosis.cx/">
    <title>Gnosis Software</title>
    <link>http://gnosis.cx/publish</link>
    <description>All the publications of David Mertz, with a sprinkling of free software, and occasional extra goodies. </description>
    <items>
      <rdf:Seq>
      %s
      </rdf:Seq>
    </items>
    <image rdf:resource="http://gnosis.cx/home/hugo.gif"/>
  </channel>
  <image rdf:about="http://gnosis.cx/home/hugo.gif">
    <title>Gnosis Software</title>
    <link>http://gnosis.cx/publish</link>
    <url>http://gnosis.cx/home/hugo.gif</url>
  </image>

<!-- insert -->
'''
root = 'http://gnosis.cx/'
item = '''
  <item rdf:about="%s">
    <title>%s</title>
    <link>%s</link>
    <description>%s</description>
    <dc:date>%s</dc:date>
  </item>
'''
urls = []
itags = []
root = 'www/publish/programming/'
# Look for regular articles
for fname in glob.glob(root+'*.txt'):
    ts = os.stat(fname).st_mtime
    if ts > recent:
        url = fname.replace('www/', root).replace('.txt','.html')
        urls.append(url)
        txt = open(fname).read().replace('\r\n','\n')
        paras = txt.split('\n\n')
        title, author, abstract = paras[:3]
        date = author.split('\n')[-1]
        itags.append(item % (title, url, abstract, date))

# Look for tutorials
for fname in glob.glob(root+'*.xml'):
    ts = os.stat(fname).st_mtime
    if ts > recent:
        tut = make_instance(fname)
        if tagname(tut) != 'tutorial':
            continue
        url = fname.replace('www/', root).replace('.xml','.html')
        urls.append(url)
        itags.append(item % (tut.title, url, tut.abstract, time.ctime(ts)))

# Look for announcements
for fname in glob.glob('announce/*.txt'):
    ts = os.stat(fname).st_mtime
    if ts > recent:
        ann = make_instance(fname)
        urls.append(ann.url)
        itags.append(item % (ann.title, ann.url, ann.abstract.PCDATA, ann.date))

items = '\n      '.join(['<rdf:li rdf:resource="%s"/>'%u for u in urls])

fp = open('www/rss.xml','w')
print >> fp, header % items
print >> fp, ''.join(itags)
print >> fp, '</rdf:RDF>'