def is_valid_uid(u_id):
"""
Given a u_id, returns whether it is a valid u_id.
"""
data = get_data()
for user in data["users"]:
if user["u_id"] == u_id:
return True
return False
def is_valid_channel(channel_id):
"""
Given a channel_id, returns whether it is a valid channel.
"""
data = get_data()
for channel in data["channels"]:
if channel["channel_id"] == channel_id:
return True
return False
def is_valid_password(u_id, password):
"""
Given a password determine whether it is a valid password for the u_id.
"""
data = get_data()
for user in data["users"]:
for valid_u_id in user["u_id"]:
if valid_u_id == u_id:
if user["password"] == password:
return True
return False
def is_valid_token(token):
"""
A helper function used for TESTING and SERVER FUNCTIONS
:param token: a string encoded with jwt received from auth_login or auth_register
:return: boolean of whether the token has or hasn't been tampered with
"""
data = get_data()
for user in data["users"]:
if token in user["valid_tokens"]:
return True
return False
def check_email(email):
"""
Given an email determines whether it belongs to a user u_id.
The function returns true if the email doesn't belong to a user
and false if it does.
"""
data = get_data()
counter = 0
# Check the email belongs to a user
for user in data["users"]:
if user["email"] == email:
counter = 1
if counter < 1:
return True
return False
def is_owner(user_id, channel_id):
"""
This function returns a boolean indicating whether a user is an owner of a channel
usage: pass in a valid token, a user_id, and a channel_id
Important: This helper function will only work when the following functions are complete:
auth_login
channel_details
"""
data = get_data()
for channel in data["channels"]:
if channel["channel_id"] == channel_id:
for owner in channel["owner_members"]:
if owner["u_id"] == user_id:
return True
return False
def check_password(u_id, password):
"""
Given a password determines whether it belongs to the correct user u_id.
The function returns true if the password does not belong to the user and
false if it does.
"""
data = get_data()
counter = 0
# Check that the password belongs to the correct user
for user in data["users"]:
hashed_password = hashlib.sha256(password.encode()).hexdigest()
if user["u_id"] == u_id and user["password"] == hashed_password:
counter = 1
if counter < 1:
return True
return False