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# Local imports
try:
from string import letters
except ImportError:
from string import ascii_letters as letters
from string import digits, punctuation
import hashlib
from textwrap import dedent
import os
# Django imports
from django.utils.crypto import get_random_string
from django.conf import settings
from django.core.mail import EmailMultiAlternatives, send_mail
from django.core.files.storage import default_storage
from django.core.files.base import ContentFile
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 = 'Yaksh Email Verification'
message = dedent("""\
To activate your account and verify your email address,
please click the following link:
{0}/exam/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
def send_bulk_mail(subject, email_body, recipients, attachments):
try:
text_msg = ""
msg = EmailMultiAlternatives(subject, text_msg, settings.SENDER_EMAIL,
[settings.SENDER_EMAIL], bcc=recipients
)
msg.attach_alternative(email_body, "text/html")
if attachments:
for file in attachments:
path = default_storage.save(
os.path.join('attachments', file.name),
ContentFile(file.read())
)
msg.attach_file(os.sep.join((settings.MEDIA_ROOT, path)),
mimetype="text/html"
)
default_storage.delete(path)
msg.send()
message = "Email Sent Successfully"
except Exception as exc_msg:
message = """Error: {0}. Please check email address.\
If email address is correct then
Please contact {1}.""".format(exc_msg, settings.REPLY_EMAIL)
return message
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