from SitePage import SitePage
from WebKit.HTTPExceptions import HTTPNotFound
import os
import re

wikiRoot = '/var/lib/wiki/wiki.webwareforpython.org'

class WikiPage(SitePage):

    def wikiName(self):
        return 'name_of_wiki_page'

    def title(self):
        try:
            meta = open(os.path.join(wikiRoot, self.wikiName()) + ".meta", 'r')
        except IOError:
            pass
        else:
            lines = meta.readlines()
            meta.close()
            for l in lines:
                if l.startswith('title:'):
                    return l[7:]
        return ''

    def fixPath(self, match):
        # fix up relative URLS.  Leave absolute URLs unchanged.
        url = match.group(1)
        if url and url[0] == '/':
            return 'href="%s"' % url
        if len(url) >= 5 and url[:5] == 'http:':
            return 'href="%s"' % url
        if len(url) >= 7 and url[:7] == 'mailto:':
            return 'href="%s"' % url
        return 'href="%sWiki/%s"' % (self.request().siteRoot(), url)

    def fixPaths(self, page):
        page = re.sub('href\s*=\s*"([^"]*)"', self.fixPath, page)
        return page

    def writeContent(self):    
        try:
            meta = open(os.path.join(wikiRoot, self.wikiName()) + ".html", 'r')
        except IOError:
            raise HTTPNotFound()
        else:
            page = meta.read()
            page = self.fixPaths(page)
            self.write(page)
            meta.close()
            self.writeFooter()

    def writeFooter(self):
        self.writeln('<hr /><p>This page <a href="http://wiki.w4py.org/%s.html?_action_=edit">can be updated</a> in the <a href="http://wiki.w4py.org">Webware Wiki.</a></p>' % (self.wikiName()))