"""passbook OTP Utils"""
from django.utils.http import urlencode
def otpauth_url(accountname, secret, issuer=None, digits=6):
"""Create otpauth according to
https://github.com/google/google-authenticator/wiki/Key-Uri-Format"""
# Ensure that the secret parameter is the FIRST parameter of the URI, this
# allows Microsoft Authenticator to work.
query = [
("secret", secret),
("digits", digits),
("issuer", "passbook"),
]
return "otpauth://totp/%s:%s?%s" % (issuer, accountname, urlencode(query))
