SO_Chatters.py

#! /usr/bin/env python

''' Who's logged into the sopython Chatroom

    Written by PM 2Ring 2015.03.22
'''

import sys, urllib, re, time

sopython_url = 'http://chat.stackoverflow.com/rooms/6/python'

def main():
    #Get maximum age of last post in hours from command line
    maxage = float(sys.argv[1]) if len(sys.argv) > 1 else 1

    #Convert to seconds
    maxage *= 3600.0

    url = sopython_url
    print 'Fetching sopython Chatroom data...\n'

    try:
        fd = urllib.urlopen(url)
        data = fd.read()
    except IOError, s:
        print >>sys.stderr, s, '\nAborting'
        raise SystemExit, 1
    finally:
        fd.close()

    try:
        start = data.index('CHAT.RoomUsers.initPresent([')
        finish = data.index(']);', start)
    except ValueError:
        print >>sys.stderr, "Names list not found!"
        raise SystemExit, 1

    data = data[start:finish+1]
    #print data
    extract(data, maxage)


def extract(data, maxage):
    timefmt = '%X %x'

    diamond = u'\u25C6'
    extras = {'owner': '*', 'moderator': diamond}

    pat = r'\{.* name: \("([^"]+)"\), .* reputation: (\d+), last_post: (\d+)(.+)*\}'
    data = re.findall(pat, data)

    now = time.time()
    print 'People logged in at %s\n' % time.strftime(timefmt)

    #Get data for all posters who's last post time is within age limit
    newdata = []
    max_name_width = 0
    for name, rep, lptime, tail in data:
        lptime = float(lptime)
        if now - lptime <= maxage:
            timestr = time.strftime(timefmt, time.localtime(lptime))
            name = name.decode('unicode-escape') + ' '
            tail = ' '.join([extras[k] for k in extras if k in tail])
            newdata.append((name, timestr, rep, tail))
            max_name_width = max(max_name_width, len(name))

    max_name_width += 2
    print '%-s %-17s %-6s' % ('Name'.ljust(max_name_width), 'Last post', 'Rep')
    for name, timestr, rep, tail, in newdata:
        print '%-s %-17s %6s %s' % (name.ljust(max_name_width,'.'), timestr, rep, tail)


if __name__ == '__main__':
    main()