"""cpirclog, a CherryPy front-end to irclog2html.

You'll have to obtain irclog2html yourself, from http://mg.pov.lt/irclog2html/
Then, either stick this file in that folder, or put irclog2html in your
Python path (and any .css files, etc in this folder).
"""

import os
try:
    import cStringIO as StringIO
except ImportError:
    import StringIO
import sys
import threading

import irclog2html
import cherrypy


thisdir = os.path.join(os.getcwd(), os.path.dirname(__file__))


class Root:
    
    style = irclog2html.XHTMLStyle
    logdir = thisdir
    
    irclog_css = cherrypy.tools.staticfile.handler(
        filename=os.path.join(thisdir, 'irclog.css'))
    
    def default(self, channel, page=None, q=None):
        outfile = StringIO.StringIO()
        chandir = os.path.join(self.logdir, "#%s" % channel)
        
        try:
            fnames = [fname.rsplit(".", 1)[0] for fname
                      in os.listdir(chandir) if fname.endswith(".log")]
            fnames.sort()
        except:
            raise cherrypy.NotFound()
        
        if page is None:
            # Grab the last page; assume they're in order
            pos = len(fnames) - 1
        elif page in fnames:
            pos = fnames.index(page)
        else:
            # Grab the nearest previous page.
            fnames.append(page)
            fnames.sort()
            pos = fnames.index(page) - 1
            fnames.remove(page)
        
        if pos < 0:
            pos = 0
        elif pos > len(fnames) - 1:
            pos = len(fnames) - 1
        
        page = fnames[pos]
        if pos > 0:
            prev = fnames[pos - 1]
        else:
            prev = ''
        if pos < len(fnames) - 1:
            next = fnames[pos + 1]
        else:
            next = ''
        
        chanfile = os.path.join(self.logdir, chandir, "%s.log" % page)
        
        # Prevent uplevel attacks
        if not os.path.normpath(chanfile).startswith(self.logdir):
            raise cherrypy.NotFound()
        
        try:
            infile = open(chanfile, 'rb')
        except IOError:
            raise cherrypy.NotFound()
        
        parser = irclog2html.LogParser(infile)
        formatter = self.style(outfile)
        irclog2html.convert_irc_log(
            parser, formatter, "IRC Log for #%s %s" % (channel, page),
            ('Previous', prev), ('', ''), ('Next', next), searchbox=False)
        outfile.seek(0)
        return outfile.read()
    default.exposed = True


if __name__ == '__main__':
    cherrypy.quickstart(Root(), '/')