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path: root/sbhs/send_emails.py
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import hashlib
try:
	from string import letters
except ImportError:
	from string import ascii_letters as letters
from string import digits, punctuation

from django.utils.crypto import get_random_string
from django.conf import settings
from django.core.mail import send_mail
from textwrap import dedent

def generate_activation_key(username):
	"""
	Generate hashed secret key for email activation
	"""
	chars = letters + digits + punctuation
	secret_key = get_random_string(20,chars)
	return hashlib.sha256((secret_key+username).encode('utf-8')).hexdigest()

def send_user_mail(user_mail, key):
	""" Send mail to user whose email is to be verified
	This function should get two args i.e user_email and secret_key.
	The activation url is generated from settings.PRODUCTION_URL and 
	key.
	"""
	try:
	    to = user_mail
	    subject = 'SBHS Email Verification'
	    message = dedent("""\
	            To activate your account and verify your email address,
	            please click the following link:
	            {0}/account/activate/{1}
	            If clicking the link above does not work,
	            copy and paste the URL in a new browser window instead.
	            For any issue, please write us on {2}

	            Regards,
	            {3}
	        """.format(settings.PRODUCTION_URL, key, settings.REPLY_EMAIL,
	                   settings.SENDER_NAME
	                   )
	        )

	    send_mail(subject, message, settings.SENDER_EMAIL, [to])

	    msg = "An activation link is sent to your registered email.\
	                    Please activate the link within 20 minutes."
	    success = True

	except Exception as exc_msg:
	    msg = """Error: {0}. Please check your email address.\
	            If email address is correct then
	            Please contact {1}.""".format(exc_msg, settings.REPLY_EMAIL)
	    success = False

	return success, msg