md5

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# SetWall - Wallpaper manager
# 
# Copyright (C) 2014  Cristian Andrei Calin <cristian.calin@outlook.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import sys
import time
import os
import os.path
import signal

from threading import *
from Queue import *

from wpm.bst import *
from wpm.utils import *

finished = False

# Printer thread
def printer(q):
  global finished
  while not finished:
    try:
      item = q.get_nowait()
      print "%s %s" % (item["md5"], item["file"])
      q.task_done()
    except:
      None

# Feeder thread
def feeder(q, directory):
  l = os.listdir(directory)
  tree = bst(l)
  for i in tree.as_list():
    q.put(i)

# MD5 comute thread
def compute(q_in, q_out, directory):
  global finished
  while not finished:
    try:
      item = q_in.get_nowait()
      filename = "%s/%s" % (directory, item)
      if os.path.isfile(filename):
        md5_sum = md5sum(filename)
        q_out.put({"md5": md5_sum, "file": item})
      q_in.task_done()
    except:
      None

if __name__ == "__main__":
  directory = sys.argv[1]
  num_threads = int(sys.argv[2])
  input_queue = Queue()
  output_queue = Queue()

  workers = []

  #feeder(input_queue, directory)
  thread_feeder = Thread(
    target = feeder, 
    kwargs = {"q": input_queue, "directory": directory}
  )
  thread_feeder.start()

  # wait for the feeder to start feeding
  while input_queue.empty():
    time.sleep(0.05)

  for i in range(num_threads):
    t = Thread(
      target = compute,
      kwargs =  {"q_in": input_queue, "q_out": output_queue, "directory": directory}
    )
    workers.append(t)
    t.start()

  thread_printer = Thread(
    target = printer, 
    kwargs = {"q": output_queue}
  )
  thread_printer.start()

  input_queue.join()
  output_queue.join()
  finished = True

  #thread_feeder.join()
  thread_printer.join()

  for t in workers:
    t.join()