GoogleAuth

"""
This file contains the authentication required to manipulate Nasser's google sheets via python
"""
from __future__ import print_function
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
import gspread
from oauth2client.service_account import ServiceAccountCredentials
import sys
GOOGLE_SHEET_API_SCOPE = ['https://www.googleapis.com/auth/spreadsheets']

def sheetAuth():
    """This function is used to authenticate and return the creds
    """
    creds = None
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            print("The token file is expired, please delete it")
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file('credentials.json', GOOGLE_SHEET_API_SCOPE)
            creds = flow.run_local_server(port = 8000)
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)
    return creds