diff --git a/synapse/storage/databases/main/profile.py b/synapse/storage/databases/main/profile.py
new file mode 100644
index 0000000000..4a4f2cb385
--- /dev/null
+++ b/synapse/storage/databases/main/profile.py
@@ -0,0 +1,178 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014-2016 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from twisted.internet import defer
+
+from synapse.api.errors import StoreError
+from synapse.storage._base import SQLBaseStore
+from synapse.storage.databases.main.roommember import ProfileInfo
+
+
+class ProfileWorkerStore(SQLBaseStore):
+ @defer.inlineCallbacks
+ def get_profileinfo(self, user_localpart):
+ try:
+ profile = yield self.db_pool.simple_select_one(
+ table="profiles",
+ keyvalues={"user_id": user_localpart},
+ retcols=("displayname", "avatar_url"),
+ desc="get_profileinfo",
+ )
+ except StoreError as e:
+ if e.code == 404:
+ # no match
+ return ProfileInfo(None, None)
+ else:
+ raise
+
+ return ProfileInfo(
+ avatar_url=profile["avatar_url"], display_name=profile["displayname"]
+ )
+
+ def get_profile_displayname(self, user_localpart):
+ return self.db_pool.simple_select_one_onecol(
+ table="profiles",
+ keyvalues={"user_id": user_localpart},
+ retcol="displayname",
+ desc="get_profile_displayname",
+ )
+
+ def get_profile_avatar_url(self, user_localpart):
+ return self.db_pool.simple_select_one_onecol(
+ table="profiles",
+ keyvalues={"user_id": user_localpart},
+ retcol="avatar_url",
+ desc="get_profile_avatar_url",
+ )
+
+ def get_from_remote_profile_cache(self, user_id):
+ return self.db_pool.simple_select_one(
+ table="remote_profile_cache",
+ keyvalues={"user_id": user_id},
+ retcols=("displayname", "avatar_url"),
+ allow_none=True,
+ desc="get_from_remote_profile_cache",
+ )
+
+ def create_profile(self, user_localpart):
+ return self.db_pool.simple_insert(
+ table="profiles", values={"user_id": user_localpart}, desc="create_profile"
+ )
+
+ def set_profile_displayname(self, user_localpart, new_displayname):
+ return self.db_pool.simple_update_one(
+ table="profiles",
+ keyvalues={"user_id": user_localpart},
+ updatevalues={"displayname": new_displayname},
+ desc="set_profile_displayname",
+ )
+
+ def set_profile_avatar_url(self, user_localpart, new_avatar_url):
+ return self.db_pool.simple_update_one(
+ table="profiles",
+ keyvalues={"user_id": user_localpart},
+ updatevalues={"avatar_url": new_avatar_url},
+ desc="set_profile_avatar_url",
+ )
+
+
+class ProfileStore(ProfileWorkerStore):
+ def add_remote_profile_cache(self, user_id, displayname, avatar_url):
+ """Ensure we are caching the remote user's profiles.
+
+ This should only be called when `is_subscribed_remote_profile_for_user`
+ would return true for the user.
+ """
+ return self.db_pool.simple_upsert(
+ table="remote_profile_cache",
+ keyvalues={"user_id": user_id},
+ values={
+ "displayname": displayname,
+ "avatar_url": avatar_url,
+ "last_check": self._clock.time_msec(),
+ },
+ desc="add_remote_profile_cache",
+ )
+
+ def update_remote_profile_cache(self, user_id, displayname, avatar_url):
+ return self.db_pool.simple_update(
+ table="remote_profile_cache",
+ keyvalues={"user_id": user_id},
+ updatevalues={
+ "displayname": displayname,
+ "avatar_url": avatar_url,
+ "last_check": self._clock.time_msec(),
+ },
+ desc="update_remote_profile_cache",
+ )
+
+ @defer.inlineCallbacks
+ def maybe_delete_remote_profile_cache(self, user_id):
+ """Check if we still care about the remote user's profile, and if we
+ don't then remove their profile from the cache
+ """
+ subscribed = yield self.is_subscribed_remote_profile_for_user(user_id)
+ if not subscribed:
+ yield self.db_pool.simple_delete(
+ table="remote_profile_cache",
+ keyvalues={"user_id": user_id},
+ desc="delete_remote_profile_cache",
+ )
+
+ def get_remote_profile_cache_entries_that_expire(self, last_checked):
+ """Get all users who haven't been checked since `last_checked`
+ """
+
+ def _get_remote_profile_cache_entries_that_expire_txn(txn):
+ sql = """
+ SELECT user_id, displayname, avatar_url
+ FROM remote_profile_cache
+ WHERE last_check < ?
+ """
+
+ txn.execute(sql, (last_checked,))
+
+ return self.db_pool.cursor_to_dict(txn)
+
+ return self.db_pool.runInteraction(
+ "get_remote_profile_cache_entries_that_expire",
+ _get_remote_profile_cache_entries_that_expire_txn,
+ )
+
+ @defer.inlineCallbacks
+ def is_subscribed_remote_profile_for_user(self, user_id):
+ """Check whether we are interested in a remote user's profile.
+ """
+ res = yield self.db_pool.simple_select_one_onecol(
+ table="group_users",
+ keyvalues={"user_id": user_id},
+ retcol="user_id",
+ allow_none=True,
+ desc="should_update_remote_profile_cache_for_user",
+ )
+
+ if res:
+ return True
+
+ res = yield self.db_pool.simple_select_one_onecol(
+ table="group_invites",
+ keyvalues={"user_id": user_id},
+ retcol="user_id",
+ allow_none=True,
+ desc="should_update_remote_profile_cache_for_user",
+ )
+
+ if res:
+ return True
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