diff --git a/synapse/rest/admin/users.py b/synapse/rest/admin/users.py
index f20aa65301..c0bebc3cf0 100644
--- a/synapse/rest/admin/users.py
+++ b/synapse/rest/admin/users.py
@@ -35,6 +35,7 @@ from synapse.rest.admin._base import (
assert_user_is_admin,
)
from synapse.rest.client._base import client_patterns
+from synapse.storage.databases.main.registration import ExternalIDReuseException
from synapse.storage.databases.main.stats import UserSortOrder
from synapse.types import JsonDict, UserID
@@ -228,12 +229,12 @@ class UserRestServletV2(RestServlet):
if not isinstance(deactivate, bool):
raise SynapseError(400, "'deactivated' parameter is not of type boolean")
- # convert List[Dict[str, str]] into Set[Tuple[str, str]]
+ # convert List[Dict[str, str]] into List[Tuple[str, str]]
if external_ids is not None:
- new_external_ids = {
+ new_external_ids = [
(external_id["auth_provider"], external_id["external_id"])
for external_id in external_ids
- }
+ ]
# convert List[Dict[str, str]] into Set[Tuple[str, str]]
if threepids is not None:
@@ -275,28 +276,13 @@ class UserRestServletV2(RestServlet):
)
if external_ids is not None:
- # get changed external_ids (added and removed)
- cur_external_ids = set(
- await self.store.get_external_ids_by_user(user_id)
- )
- add_external_ids = new_external_ids - cur_external_ids
- del_external_ids = cur_external_ids - new_external_ids
-
- # remove old external_ids
- for auth_provider, external_id in del_external_ids:
- await self.store.remove_user_external_id(
- auth_provider,
- external_id,
- user_id,
- )
-
- # add new external_ids
- for auth_provider, external_id in add_external_ids:
- await self.store.record_user_external_id(
- auth_provider,
- external_id,
+ try:
+ await self.store.replace_user_external_id(
+ new_external_ids,
user_id,
)
+ except ExternalIDReuseException:
+ raise SynapseError(409, "External id is already in use.")
if "avatar_url" in body and isinstance(body["avatar_url"], str):
await self.profile_handler.set_avatar_url(
@@ -384,12 +370,15 @@ class UserRestServletV2(RestServlet):
)
if external_ids is not None:
- for auth_provider, external_id in new_external_ids:
- await self.store.record_user_external_id(
- auth_provider,
- external_id,
- user_id,
- )
+ try:
+ for auth_provider, external_id in new_external_ids:
+ await self.store.record_user_external_id(
+ auth_provider,
+ external_id,
+ user_id,
+ )
+ except ExternalIDReuseException:
+ raise SynapseError(409, "External id is already in use.")
if "avatar_url" in body and isinstance(body["avatar_url"], str):
await self.profile_handler.set_avatar_url(
diff --git a/synapse/storage/databases/main/registration.py b/synapse/storage/databases/main/registration.py
index 0ab56d8a07..37d47aa823 100644
--- a/synapse/storage/databases/main/registration.py
+++ b/synapse/storage/databases/main/registration.py
@@ -23,7 +23,11 @@ import attr
from synapse.api.constants import UserTypes
from synapse.api.errors import Codes, StoreError, SynapseError, ThreepidValidationError
from synapse.metrics.background_process_metrics import wrap_as_background_process
-from synapse.storage.database import DatabasePool, LoggingDatabaseConnection
+from synapse.storage.database import (
+ DatabasePool,
+ LoggingDatabaseConnection,
+ LoggingTransaction,
+)
from synapse.storage.databases.main.cache import CacheInvalidationWorkerStore
from synapse.storage.databases.main.stats import StatsStore
from synapse.storage.types import Cursor
@@ -40,6 +44,13 @@ THIRTY_MINUTES_IN_MS = 30 * 60 * 1000
logger = logging.getLogger(__name__)
+class ExternalIDReuseException(Exception):
+ """Exception if writing an external id for a user fails,
+ because this external id is given to an other user."""
+
+ pass
+
+
@attr.s(frozen=True, slots=True)
class TokenLookupResult:
"""Result of looking up an access token.
@@ -588,24 +599,44 @@ class RegistrationWorkerStore(CacheInvalidationWorkerStore):
auth_provider: identifier for the remote auth provider
external_id: id on that system
user_id: complete mxid that it is mapped to
+ Raises:
+ ExternalIDReuseException if the new external_id could not be mapped.
"""
- await self.db_pool.simple_insert(
+
+ try:
+ await self.db_pool.runInteraction(
+ "record_user_external_id",
+ self._record_user_external_id_txn,
+ auth_provider,
+ external_id,
+ user_id,
+ )
+ except self.database_engine.module.IntegrityError:
+ raise ExternalIDReuseException()
+
+ def _record_user_external_id_txn(
+ self,
+ txn: LoggingTransaction,
+ auth_provider: str,
+ external_id: str,
+ user_id: str,
+ ) -> None:
+
+ self.db_pool.simple_insert_txn(
+ txn,
table="user_external_ids",
values={
"auth_provider": auth_provider,
"external_id": external_id,
"user_id": user_id,
},
- desc="record_user_external_id",
)
async def remove_user_external_id(
self, auth_provider: str, external_id: str, user_id: str
) -> None:
"""Remove a mapping from an external user id to a mxid
-
If the mapping is not found, this method does nothing.
-
Args:
auth_provider: identifier for the remote auth provider
external_id: id on that system
@@ -621,6 +652,60 @@ class RegistrationWorkerStore(CacheInvalidationWorkerStore):
desc="remove_user_external_id",
)
+ async def replace_user_external_id(
+ self,
+ record_external_ids: List[Tuple[str, str]],
+ user_id: str,
+ ) -> None:
+ """Replace mappings from external user ids to a mxid in a single transaction.
+ All mappings are deleted and the new ones are created.
+
+ Args:
+ record_external_ids:
+ List with tuple of auth_provider and external_id to record
+ user_id: complete mxid that it is mapped to
+ Raises:
+ ExternalIDReuseException if the new external_id could not be mapped.
+ """
+
+ def _remove_user_external_ids_txn(
+ txn: LoggingTransaction,
+ user_id: str,
+ ) -> None:
+ """Remove all mappings from external user ids to a mxid
+ If these mappings are not found, this method does nothing.
+
+ Args:
+ user_id: complete mxid that it is mapped to
+ """
+
+ self.db_pool.simple_delete_txn(
+ txn,
+ table="user_external_ids",
+ keyvalues={"user_id": user_id},
+ )
+
+ def _replace_user_external_id_txn(
+ txn: LoggingTransaction,
+ ):
+ _remove_user_external_ids_txn(txn, user_id)
+
+ for auth_provider, external_id in record_external_ids:
+ self._record_user_external_id_txn(
+ txn,
+ auth_provider,
+ external_id,
+ user_id,
+ )
+
+ try:
+ await self.db_pool.runInteraction(
+ "replace_user_external_id",
+ _replace_user_external_id_txn,
+ )
+ except self.database_engine.module.IntegrityError:
+ raise ExternalIDReuseException()
+
async def get_user_by_external_id(
self, auth_provider: str, external_id: str
) -> Optional[str]:
|
