import os.path
__author__="bjschuma"
__date__ ="$Dec 6, 2009 11:35:56 PM$"

import os
from message import write


# Check if path is a directory
def checkDir(path):
	path = os.path.expanduser(path)
	if checkPath(path) == True:
		return os.path.isdir(path)
	return False


# Check if path exists
def checkPath(path):
	path = os.path.expanduser(path)
	write("Checking if "+path+" exists", True)
	return os.path.exists(path)


def expandPath(path):
	return os.path.expanduser(path)


# Open a file
def fopen(path,flags='r'):
	path = os.path.expanduser(path)
	# If we are reading a file, check that it exists
	if ('r' in flags) == True:
		exists = checkPath(path)
		if exists == False:
			write(path+" does not exist", True)
			return None
	return open(path, flags)


# Return a listing of directory contents
def ls(path):
	if checkDir(path) == False:
		return False
	return os.listdir(path)



# Remove a file
def rm(path):
	if checkPath(path)==False:
		write("File does not exist: "+path)
		return;
	os.remove(path)