from typing import Optional from sqlalchemy.exc import IntegrityError from app.email_utils import ( get_email_domain_part, send_cannot_create_directory_alias, send_cannot_create_domain_alias, email_belongs_to_alias_domains, ) from app.extensions import db from app.log import LOG from app.models import ( Alias, CustomDomain, Directory, User, DeletedAlias, ) def try_auto_create(address: str) -> Optional[Alias]: """Try to auto-create the alias using directory or catch-all domain """ alias = try_auto_create_catch_all_domain(address) if not alias: alias = try_auto_create_directory(address) return alias def try_auto_create_directory(address: str) -> Optional[Alias]: """ Try to create an alias with directory """ # check if alias belongs to a directory, ie having directory/anything@EMAIL_DOMAIN format if email_belongs_to_alias_domains(address): # if there's no directory separator in the alias, no way to auto-create it if "/" not in address and "+" not in address and "#" not in address: return None # alias contains one of the 3 special directory separator: "/", "+" or "#" if "/" in address: sep = "/" elif "+" in address: sep = "+" else: sep = "#" directory_name = address[: address.find(sep)] LOG.d("directory_name %s", directory_name) directory = Directory.get_by(name=directory_name) if not directory: return None dir_user: User = directory.user if not dir_user.can_create_new_alias(): send_cannot_create_directory_alias(dir_user, address, directory_name) return None # if alias has been deleted before, do not auto-create it if DeletedAlias.get_by(email=address, user_id=directory.user_id): LOG.warning( "Alias %s was deleted before, cannot auto-create using directory %s, user %s", address, directory_name, dir_user, ) return None LOG.d("create alias %s for directory %s", address, directory) alias = Alias.create( email=address, user_id=directory.user_id, directory_id=directory.id, mailbox_id=dir_user.default_mailbox_id, ) db.session.commit() return alias def try_auto_create_catch_all_domain(address: str) -> Optional[Alias]: """Try to create an alias with catch-all domain""" # try to create alias on-the-fly with custom-domain catch-all feature # check if alias is custom-domain alias and if the custom-domain has catch-all enabled alias_domain = get_email_domain_part(address) custom_domain = CustomDomain.get_by(domain=alias_domain) if not custom_domain: return None # custom_domain exists if not custom_domain.catch_all: return None # custom_domain has catch-all enabled domain_user: User = custom_domain.user if not domain_user.can_create_new_alias(): send_cannot_create_domain_alias(domain_user, address, alias_domain) return None # if alias has been deleted before, do not auto-create it if DeletedAlias.get_by(email=address): LOG.warning( "Alias %s was deleted before, cannot auto-create using domain catch-all %s, user %s", address, custom_domain, domain_user, ) return None LOG.d("create alias %s for domain %s", address, custom_domain) alias = Alias.create( email=address, user_id=custom_domain.user_id, custom_domain_id=custom_domain.id, automatic_creation=True, mailbox_id=domain_user.default_mailbox_id, ) db.session.commit() return alias def delete_alias(alias: Alias, user: User): email = alias.email Alias.delete(alias.id) db.session.commit() # try to save deleted alias try: DeletedAlias.create(email=email) db.session.commit() # this can happen when a previously deleted alias is re-created via catch-all or directory feature except IntegrityError: LOG.error("alias %s has been added before to DeletedAlias", email) db.session.rollback()