#!/usr/bin/env python
"""
metakey.py - Metadata Templating
Author: Sean B. Palmer, inamidst.com
"""

import cgitb; cgitb.enable()
import sys, os, re, urlparse
from imp import load_source as load
sitemap = load('sitemap', 'sitemap.cgi')

meta = '../meta'

r_template = re.compile('<!-- Template: ([a-z]+) -->')

def strip(start, text): 
   if text.startswith(start): 
      return text[len(start):]
   return text

def urijoin(site, *parts): 
   path = os.path.join(*parts)
   normpath = os.path.normpath(path)
   if path.endswith('/'): normpath += '/'
   return urlparse.urljoin(site, path)

def urisplit(uri): 
   scheme, host, path, query, fragid = urlparse.urlsplit(uri)
   if not scheme and not host: 
      return '/', path
   return '%s://%s/' % (scheme, host), path

def fileinfo(path): 
   metadata = {}
   f = open(path)
   for line in f: 
      line = line.rstrip('\r\n')
      if (not line.startswith('#')) and line: 
         metadata.__setitem__(*line.split(': ', 1))
      else: continue
   f.close()
   return metadata

def makelink(uri, metadata): 
   if metadata.has_key('keywords'): 
      keywords = frozenset(metadata['keywords'].split(' '))
   else: keywords = frozenset([])

   # if 'highlight' in keywords: 
   #    link = '<a href="%s">%s</a><sup class="highlight">*</sup>'
   # else: 
   link = '<a href="%s">%s</a>'

   result = link % (uri, metadata.get('title'))
   if ('cgi' in keywords) or ('svc' in keywords): 
      site, path = urisplit(uri)
      srcuri = urlparse.urljoin(site, 'inside' + path)
      result += ' (<a href="%s">src</a>)' % srcuri
   return result + ' - ' + metadata.get('description')

def bykeyword(keyword): 
   result = []
   for root, dirs, files in os.walk(meta): 
      if root == meta: 
         del dirs[dirs.index('meta')]
         files.remove('.htaccess')
         files.remove('index.cgi')

      dirname = '/' + root[len(meta):].lstrip('/')
      for filename in files: 
         metafn = os.path.join(root, filename)
         metadata = fileinfo(metafn)
         path = os.path.join(dirname, filename)
         if path.endswith('/index'): 
            path = path[:-5]

         if metadata.has_key('keywords'): 
            keywords = frozenset(metadata['keywords'].split(' '))
            if keyword in keywords: 
               result.append((path, metafn, metadata))
   return sorted(result)

def getclass(metadata): 
   return '' # @@
   if metadata.has_key('keywords'): 
      keywords = frozenset(metadata['keywords'].split(' '))
      if 'act' in keywords: return ' class="act"'
      if 'code' in keywords: return ' class="code"'
      if 'doc' in keywords: return ' class="doc"'
      if 'pub' in keywords: return ' class="pub"'
      if 'svc' in keywords: return ' class="svc"'
   return ''

def html(files): 
   result = ['<ul>']
   for path, metafn, metadata in files: 
      tag = '<li%s>' % getclass(metadata)
      result.append(tag + makelink(path, metadata) + '</li>')
   result.append('</ul>')
   return '\n'.join(result)

def mkhtml(m): 
   keyword = m.group(1)
   if keyword != 'sitemap': 
      files = bykeyword(keyword)
      print html(files)
   else: print sitemap.sitemap()

def main(): 
   f = open(sys.argv[1])
   for line in f: 
      if r_template.match(line): 
         print r_template.sub(mkhtml, line)
      else: sys.stdout.write(line)
   f.close()

if __name__=="__main__": 
   main()