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"""Handle user collections."""
import uuid
import json
from redis import Redis
from email_validator import validate_email, EmailNotValidError
from .models import User
def __valid_email__(email:str) -> bool:
"""Check for email validity."""
try:
validate_email(email, check_deliverability=True)
except EmailNotValidError as _enve:
return False
return True
def __toggle_boolean_field__(
rconn: Redis, email: str, field: str):
"""Toggle the valuen of a boolean field"""
mig_dict = json.loads(rconn.hget("migratable-accounts", email) or "{}")
if bool(mig_dict):
rconn.hset("migratable-accounts", email,
{**mig_dict, field: not mig_dict.get(field, True)})
def __build_email_uuid_bridge__(rconn: Redis):
"""
Build a connection between new accounts and old user accounts.
The only thing that is common between the two is the email address,
therefore, we use that to link the two items.
"""
old_accounts = {
account["email_address"]: {
"user_id": account["user_id"],
"collections-migrated": False,
"resources_migrated": False
} for account in (
acct for acct in
(json.loads(usr) for usr in rconn.hgetall("users").values())
if (bool(acct.get("email_address", False)) and
__valid_email__(acct["email_address"])))
}
if bool(old_accounts):
rconn.hset("migratable-accounts", mapping={
key: json.dumps(value) for key,value in old_accounts.items()
})
return old_accounts
def __retrieve_old_accounts__(rconn: Redis) -> dict:
accounts = rconn.hgetall("migratable-accounts")
if accounts:
return {
key: json.loads(value) for key, value in accounts.items()
}
return __build_email_uuid_bridge__(rconn)
def __retrieve_old_user_collections__(rconn: Redis, old_user_id: uuid.UUID) -> tuple:
"""Retrieve any old collections relating to the user."""
return tuple(json.loads(rconn.hget("collections", old_user_id) or "[]"))
def user_collections(rconn: Redis, user: User) -> tuple:
"""Retrieve current user collections."""
collections = tuple(json.loads(
rconn.hget("collections", str(user.user_id)) or
"[]"))
old_accounts = __retrieve_old_accounts__(rconn)
if (user.email in old_accounts and
not old_accounts[user.email]["collections-migrated"]):
old_user_id = old_accounts[user.email]["user_id"]
collections = tuple(set(collections + __retrieve_old_user_collections__(
rconn, uuid.UUID(old_user_id))))
rconn.hdel("collections", old_user_id)
__toggle_boolean_field__(rconn, user.email, "collections-migrated")
rconn.hset(
"collections", key=user.user_id, value=json.dumps(collections))
return collections
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