import sys,os,contextlib,builtins,email,re

NOT_ALPHANUM = re.compile("[^A-Za-z0-9]")

inp = email.message_from_file(sys.stdin)
homedir = os.path.dirname(__file__)
ship = "anon.hmm.st"

def input():
	return inp

def setcwd(c):
	homedir = c

@contextlib.contextmanager
def open(*args,**kwargs):
	args = list(args)
	fn = os.path.join(homedir,args.pop(0))
	f = builtins.open(fn,*args,**kwargs)
	try:
		yield f
	finally:
		f.close()

def getshipdir():
	return os.path.join(homedir,"ships",ship)

def get_name_from_title(title):
	shipdir = getshipdir()
	t = NOT_ALPHANUM.sub("-",title)
	t = t[:10]
	if os.path.exists(os.path.join(shipdir,t+".txt")):
		n = 1
		while os.path.exists(os.path.join(shipdir,t+str(n)+".txt")):
			n+=1
		return os.path.join(shipdir,t+str(num)+".txt")
	else: return os.path.join(shipdir,t+".txt")

def write_file(filename,text):
	with open(filename,"w") as f:
		f.write(text)
	os.chmod(filename,0o666)