#!/usr/bin/env python
# sends me an sms for utsa new mail

__author__ = "Cody Lee <platinummonkey@archlinux.us>"

import os               # Miscellaneous OS interfaces.
import sys              # System-specific parameters and functions.
import libgmail
import time

username = 'username@gmail.com'
password = 'c0mputerspeck'
SEARCHLABEL = 'TAMU'
PHONENUMBER = '5551234567'
LOGFILE = '/path/to/utsa-gmail.log'
SLEEPTIME = 60*5 # 5 min

# Default daemon parameters.
# File mode creation mask of the daemon.
UMASK = 0

# Default working directory for the daemon.
WORKDIR = "/path/to/whatever/"

# Default maximum for the number of available file descriptors.
MAXFD = 1024

# The standard I/O file descriptors are redirected to /dev/null by default.
if (hasattr(os, "devnull")):
   REDIRECT_TO = os.devnull
else:
   REDIRECT_TO = "/dev/null"

def createDaemon():
   """Detach a process from the controlling terminal and run it in the
   background as a daemon.
   """

   try:
      pid = os.fork()
   except OSError, e:
      raise Exception, "%s [%d]" % (e.strerror, e.errno)

   if (pid == 0):       # The first child.
      os.setsid()

      try:
         pid = os.fork()        # Fork a second child.
      except OSError, e:
         raise Exception, "%s [%d]" % (e.strerror, e.errno)

      if (pid == 0):    # The second child.
         os.chdir(WORKDIR)
         os.umask(UMASK)
      else:
         os._exit(0)    # Exit parent (the first child) of the second child.
   else:
      os._exit(0)       # Exit parent of the first child.

   import resource              # Resource usage information.
   maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
   if (maxfd == resource.RLIM_INFINITY):
      maxfd = MAXFD

   # Iterate through and close all file descriptors.
   for fd in range(0, maxfd):
      try:
         os.close(fd)
      except OSError:   # ERROR, fd wasn't open to begin with (ignored)
         pass

   os.open(REDIRECT_TO, os.O_RDWR)      # standard input (0)

   os.dup2(0, 1)                        # standard output (1)
   os.dup2(0, 2)                        # standard error (2)

   return(0)

if __name__ == "__main__":

  retCode = createDaemon()

  ga = libgmail.GmailAccount(username, password)
  ga.login()

  while True:
    MESSAGES = []

    WRITELINES = []
    f = open(LOGFILE,'r')
    for line in f.readlines():
      MESSAGES.append(line.rstrip())
      WRITELINES.append(line)

    f.close()
    os.system('cat /dev/null > %s' % LOGFILE)
    f = open(LOGFILE, 'w')

    NEWMESSAGES = {}

    folder = ga.getMessagesByLabel(SEARCHLABEL, True)
    for thread in folder:
      threadSubject = thread.subject
      for msg in thread:
        if str(msg.id) not in MESSAGES:
          NEWMESSAGES[msg.id] = [msg.author, msg.subject]
          WRITELINES.append(str(msg.id) + '\n')

    for msg in NEWMESSAGES:
      os.system("/path/to/googlevoice.pl -c sms -p %s '%s %s: %s'" % (PHONENUMBER, SEARCHLABEL, NEWMESSAGES[msg][0],NEWMESSAGES[msg][1]))

    f.writelines(WRITELINES)
    f.close()
    time.sleep(SLEEPTIME)