# Weblog viewer

# No 'from .. import' since var 'request' treads on NS's in Woven meths.
import webloglib as wll
import os, sys
from urllib import unquote_plus as uqp
from twisted.internet import reactor
from twisted.web import microdom
from twisted.web.woven import page, widgets

this_dir = os.path.dirname(__file__)
if not this_dir in sys.path: sys.path.append(this_dir)

logfile = '../access-log'
LOG = open(logfile)
RECS = []
NUM_ROWS = 25

def update():
    global RECS
    RECS.extend(LOG.readlines())
    RECS = RECS[-NUM_ROWS*3:]
    reactor.callLater(5, update)
update()

class WeblogViewer(page.Page):
    """A Page used for viewing Apache access logs."""
    templateDirectory = this_dir
    templateFile = "WeblogViewer.xhtml"

    # View factories and updates
    def wvupdate_alternateColor(self, request, node, data):
        """Makes our table rows alternate CSS classes"""
        # microdom.lmx is very handy; another example is located here:
        # http://twistedmatrix.com/documents/howto/picturepile#auto0
        tr = microdom.lmx(node)
        tr['class'] = ('odd','even')[data['_number']%2]

    # Model factories
    def wmfactory_filename(self, request):
        """Returns the filename of the log being examined."""
        return os.path.split(logfile)[1]
    
    def wmfactory_entries(self, request):
        """Return list of dict objects representing log entries"""
        entries = []
        for rec in RECS:
            hit = [field.strip('"') for field in wll.log_fields(rec)]
            if hit[wll.status] == '200' and hit[wll.referrer] != '-':
                # We add _number so that our alternateColor view will work.
                d = {'_number': len(entries),
                     'ip': hit[wll.ip],
                     'timestamp': hit[wll.timestamp],
                     'request': hit[wll.request],
                     'request_resource': hit[wll.request].split()[1],
                     'status': hit[wll.status],
                     'bytes': hit[wll.bytes],
                     'referrer': uqp(hit[wll.referrer]).replace('&',' &'),
                     'agent': hit[wll.agent],
                    }
                entries.append(d)
        return entries[-NUM_ROWS:]

resource = WeblogViewer()