visa_alert.py

#!/usr/local/bin/python

'''
Main page for UI : https://www.ustraveldocs.com/in/in-niv-waittimeinfo.asp#waittime
Check center codes : https://travel.state.gov/etc/designs/travel/TSGglobal_libs/data/PostsVWT.js
To allow SMTP client to authenticate and send email allow less secure here https://myaccount.google.com/lesssecureapps

configure here for center and type of visa
'''


centerId = 'P48'
presentSlot = '02/12/19' #dd/mm/yy

gmailId = 'harshil9968@gmail.com'
gmailPassword = 'XXXXXXXX'

purpose = 'visitor' # visitor/student/other

import requests
import datetime
import smtplib


TYPE_INDEX_REL = {
    'visitor': 0,
    'student': 1,
    'other': 2
}

def get_days(content):

    content = content.decode("utf-8").replace(',','')
    days = content.split(' Days')
    return int(days[TYPE_INDEX_REL[purpose]])

def get_present_wait_time():
    present_date_obj = datetime.datetime.strptime(presentSlot, '%d/%m/%y')
    delta = present_date_obj - datetime.datetime.now()
    return delta.days

def send_alert():
    s = smtplib.SMTP('smtp.gmail.com', 587)

    s.starttls()

    s.login(gmailId, gmailPassword)

    message = "New Visa Slot available after %d days " % (new_wait_time)
    s.sendmail(gmailId, gmailId, message)
    print('trying to send email')
    s.quit()

wait_time_api = 'https://travel.state.gov/content/travel/resources/database/database.getVisaWaitTimes.html?cid={cid}&aid=VisaWaitTimesHomePage'.format(cid=centerId)


r = requests.get(wait_time_api)
new_wait_time = get_days(r.content.strip())
present_wait_time = get_present_wait_time()

print('Present wait time : ', present_wait_time)
print('New wait time : ', new_wait_time)

if new_wait_time<present_wait_time:
    send_alert()