import configparser, csv, datetime, html.parser, itertools, os, sys

class SetupException(Exception):
 def __str__(self):
  return "Seems like config.cfg has not been created yet or contains serious errors. Run setup.py to create it."

def getSetting(section, setting, path = "config.cfg"):
 config = configparser.RawConfigParser()
 config.read(path)
 return config.get(section, setting)

def riuser():
 try:
  return getSetting("Read.it", "user")
 except:
  raise SetupException()

def ripass():
 try:
  return getSetting("Read.it", "pass")
 except:
  raise SetupException()

def fileExists(path):
 return os.path.isfile(path)

def getDate(date):
 try:
  return datetime.datetime.strptime(date, '%Y-%m-%d')
 except ValueError:
  raise ValueError("Dates must be in YYYY-MM-DD format.")

def paginate(iterable, page_size):
 while True:
  i1, i2 = itertools.tee(iterable)
  iterable, page = (itertools.islice(i1, page_size, None), list(itertools.islice(i2, page_size)))
  if len(page) == 0:
   break
  yield page

def printCSV(inlist):
 writer = csv.writer(sys.stdout)
 writer.writerows(inlist)

def unescapeText(text):
 return html.parser.HTMLParser().unescape(text).replace("'","''")