Remove remaining bits of groups code. (#12936)

* Update worker docs to remove group endpoints.
* Removes an unused parameter to `ApplicationService`.
* Break dependency between media repo and groups.
* Avoid copying `m.room.related_groups` state events during room upgrades.

19 files changed, 1 insertions, 35 deletions

diff --git a/changelog.d/12936.removal b/changelog.d/12936.removal
new file mode 100644
index 0000000000..41f6fae5da
--- /dev/null
+++ b/changelog.d/12936.removal
@@ -0,0 +1 @@
+Remove support for the non-standard groups/communities feature from Synapse.
diff --git a/docs/workers.md b/docs/workers.md
index 78973a498c..6969c424d8 100644
--- a/docs/workers.md
+++ b/docs/workers.md
@@ -191,7 +191,6 @@ information.
     ^/_matrix/federation/v1/event_auth/
     ^/_matrix/federation/v1/exchange_third_party_invite/
     ^/_matrix/federation/v1/user/devices/
-    ^/_matrix/federation/v1/get_groups_publicised$
     ^/_matrix/key/v2/query
     ^/_matrix/federation/v1/hierarchy/
 
@@ -213,9 +212,6 @@ information.
     ^/_matrix/client/(r0|v3|unstable)/devices$
     ^/_matrix/client/versions$
     ^/_matrix/client/(api/v1|r0|v3|unstable)/voip/turnServer$
-    ^/_matrix/client/(r0|v3|unstable)/joined_groups$
-    ^/_matrix/client/(r0|v3|unstable)/publicised_groups$
-    ^/_matrix/client/(r0|v3|unstable)/publicised_groups/
     ^/_matrix/client/(api/v1|r0|v3|unstable)/rooms/.*/event/
     ^/_matrix/client/(api/v1|r0|v3|unstable)/joined_rooms$
     ^/_matrix/client/(api/v1|r0|v3|unstable)/search$
@@ -255,9 +251,7 @@ information.
 
 Additionally, the following REST endpoints can be handled for GET requests:
 
-    ^/_matrix/federation/v1/groups/
     ^/_matrix/client/(api/v1|r0|v3|unstable)/pushrules/
-    ^/_matrix/client/(r0|v3|unstable)/groups/
 
 Pagination requests can also be handled, but all requests for a given
 room must be routed to the same instance. Additionally, care must be taken to
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index f03fdd6dae..e1d31cabed 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -95,7 +95,6 @@ class EventTypes:
     Aliases: Final = "m.room.aliases"
     Redaction: Final = "m.room.redaction"
     ThirdPartyInvite: Final = "m.room.third_party_invite"
-    RelatedGroups: Final = "m.room.related_groups"
 
     RoomHistoryVisibility: Final = "m.room.history_visibility"
     CanonicalAlias: Final = "m.room.canonical_alias"
diff --git a/synapse/appservice/__init__.py b/synapse/appservice/__init__.py
index ed92c2e910..0dfa00df44 100644
--- a/synapse/appservice/__init__.py
+++ b/synapse/appservice/__init__.py
@@ -70,7 +70,6 @@ class ApplicationService:
     def __init__(
         self,
         token: str,
-        hostname: str,
         id: str,
         sender: str,
         url: Optional[str] = None,
@@ -88,7 +87,6 @@ class ApplicationService:
         )  # url must not end with a slash
         self.hs_token = hs_token
         self.sender = sender
-        self.server_name = hostname
         self.namespaces = self._check_namespaces(namespaces)
         self.id = id
         self.ip_range_whitelist = ip_range_whitelist
diff --git a/synapse/config/appservice.py b/synapse/config/appservice.py
index 24498e7944..16f93273b3 100644
--- a/synapse/config/appservice.py
+++ b/synapse/config/appservice.py
@@ -179,7 +179,6 @@ def _load_appservice(
 
     return ApplicationService(
         token=as_info["as_token"],
-        hostname=hostname,
         url=as_info["url"],
         namespaces=as_info["namespaces"],
         hs_token=as_info["hs_token"],
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 5c91d33f58..e1341dd9bb 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -468,7 +468,6 @@ class RoomCreationHandler:
             (EventTypes.RoomAvatar, ""),
             (EventTypes.RoomEncryption, ""),
             (EventTypes.ServerACL, ""),
-            (EventTypes.RelatedGroups, ""),
             (EventTypes.PowerLevels, ""),
         ]
 
diff --git a/synapse/storage/databases/main/media_repository.py b/synapse/storage/databases/main/media_repository.py
index 40ac377ca9..deffdc19ce 100644
--- a/synapse/storage/databases/main/media_repository.py
+++ b/synapse/storage/databases/main/media_repository.py
@@ -278,10 +278,6 @@ class MediaRepositoryStore(MediaRepositoryBackgroundUpdateStore):
                          WHERE profiles.avatar_url = '{media_prefix}' || lmr.media_id)
                     AND NOT EXISTS
                         (SELECT 1
-                         FROM groups
-                         WHERE groups.avatar_url = '{media_prefix}' || lmr.media_id)
-                    AND NOT EXISTS
-                        (SELECT 1
                          FROM room_memberships
                          WHERE room_memberships.avatar_url = '{media_prefix}' || lmr.media_id)
                     AND NOT EXISTS
diff --git a/tests/api/test_auth.py b/tests/api/test_auth.py
index d547df8a64..bc75ddd3e9 100644
--- a/tests/api/test_auth.py
+++ b/tests/api/test_auth.py
@@ -404,7 +404,6 @@ class AuthTestCase(unittest.HomeserverTestCase):
 
         appservice = ApplicationService(
             "abcd",
-            self.hs.config.server.server_name,
             id="1234",
             namespaces={
                 "users": [{"regex": "@_appservice.*:sender", "exclusive": True}]
@@ -433,7 +432,6 @@ class AuthTestCase(unittest.HomeserverTestCase):
 
         appservice = ApplicationService(
             "abcd",
-            self.hs.config.server.server_name,
             id="1234",
             namespaces={
                 "users": [{"regex": "@_appservice.*:sender", "exclusive": True}]
diff --git a/tests/api/test_ratelimiting.py b/tests/api/test_ratelimiting.py
index 483d5463ad..f661a9ff8e 100644
--- a/tests/api/test_ratelimiting.py
+++ b/tests/api/test_ratelimiting.py
@@ -31,7 +31,6 @@ class TestRatelimiter(unittest.HomeserverTestCase):
     def test_allowed_appservice_ratelimited_via_can_requester_do_action(self):
         appservice = ApplicationService(
             None,
-            "example.com",
             id="foo",
             rate_limited=True,
             sender="@as:example.com",
@@ -62,7 +61,6 @@ class TestRatelimiter(unittest.HomeserverTestCase):
     def test_allowed_appservice_via_can_requester_do_action(self):
         appservice = ApplicationService(
             None,
-            "example.com",
             id="foo",
             rate_limited=False,
             sender="@as:example.com",
diff --git a/tests/appservice/test_api.py b/tests/appservice/test_api.py
index 3e0db4dd98..532b676365 100644
--- a/tests/appservice/test_api.py
+++ b/tests/appservice/test_api.py
@@ -37,7 +37,6 @@ class ApplicationServiceApiTestCase(unittest.HomeserverTestCase):
             url=URL,
             token="unused",
             hs_token=TOKEN,
-            hostname="myserver",
         )
 
     def test_query_3pe_authenticates_token(self):
diff --git a/tests/appservice/test_appservice.py b/tests/appservice/test_appservice.py
index 7135362f76..3018d3fc6f 100644
--- a/tests/appservice/test_appservice.py
+++ b/tests/appservice/test_appservice.py
@@ -33,7 +33,6 @@ class ApplicationServiceTestCase(unittest.TestCase):
             sender="@as:test",
             url="some_url",
             token="some_token",
-            hostname="matrix.org",  # only used by get_groups_for_user
         )
         self.event = Mock(
             event_id="$abc:xyz",
diff --git a/tests/handlers/test_appservice.py b/tests/handlers/test_appservice.py
index 0e100c404d..d96d5aa138 100644
--- a/tests/handlers/test_appservice.py
+++ b/tests/handlers/test_appservice.py
@@ -697,7 +697,6 @@ class ApplicationServicesHandlerSendEventsTestCase(unittest.HomeserverTestCase):
         # Create an application service
         appservice = ApplicationService(
             token=random_string(10),
-            hostname="example.com",
             id=random_string(10),
             sender="@as:example.com",
             rate_limited=False,
@@ -776,7 +775,6 @@ class ApplicationServicesHandlerDeviceListsTestCase(unittest.HomeserverTestCase)
         # Create an appservice that is interested in "local_user"
         appservice = ApplicationService(
             token=random_string(10),
-            hostname="example.com",
             id=random_string(10),
             sender="@as:example.com",
             rate_limited=False,
@@ -843,7 +841,6 @@ class ApplicationServicesHandlerOtkCountsTestCase(unittest.HomeserverTestCase):
         self._service_token = "VERYSECRET"
         self._service = ApplicationService(
             self._service_token,
-            "as1.invalid",
             "as1",
             "@as.sender:test",
             namespaces={
diff --git a/tests/handlers/test_user_directory.py b/tests/handlers/test_user_directory.py
index a68c2ffd45..9e39cd97e5 100644
--- a/tests/handlers/test_user_directory.py
+++ b/tests/handlers/test_user_directory.py
@@ -60,7 +60,6 @@ class UserDirectoryTestCase(unittest.HomeserverTestCase):
 
         self.appservice = ApplicationService(
             token="i_am_an_app_service",
-            hostname="test",
             id="1234",
             namespaces={"users": [{"regex": r"@as_user.*", "exclusive": True}]},
             # Note: this user does not match the regex above, so that tests
diff --git a/tests/rest/client/test_account.py b/tests/rest/client/test_account.py
index e0a11da97b..a43a137273 100644
--- a/tests/rest/client/test_account.py
+++ b/tests/rest/client/test_account.py
@@ -548,7 +548,6 @@ class WhoamiTestCase(unittest.HomeserverTestCase):
 
         appservice = ApplicationService(
             as_token,
-            self.hs.config.server.server_name,
             id="1234",
             namespaces={"users": [{"regex": user_id, "exclusive": True}]},
             sender=user_id,
diff --git a/tests/rest/client/test_login.py b/tests/rest/client/test_login.py
index 4920468f7a..f4ea1209d9 100644
--- a/tests/rest/client/test_login.py
+++ b/tests/rest/client/test_login.py
@@ -1112,7 +1112,6 @@ class AppserviceLoginRestServletTestCase(unittest.HomeserverTestCase):
         self.service = ApplicationService(
             id="unique_identifier",
             token="some_token",
-            hostname="example.com",
             sender="@asbot:example.com",
             namespaces={
                 ApplicationService.NS_USERS: [
@@ -1125,7 +1124,6 @@ class AppserviceLoginRestServletTestCase(unittest.HomeserverTestCase):
         self.another_service = ApplicationService(
             id="another__identifier",
             token="another_token",
-            hostname="example.com",
             sender="@as2bot:example.com",
             namespaces={
                 ApplicationService.NS_USERS: [
diff --git a/tests/rest/client/test_register.py b/tests/rest/client/test_register.py
index 9aebf1735a..afb08b2736 100644
--- a/tests/rest/client/test_register.py
+++ b/tests/rest/client/test_register.py
@@ -56,7 +56,6 @@ class RegisterRestServletTestCase(unittest.HomeserverTestCase):
 
         appservice = ApplicationService(
             as_token,
-            self.hs.config.server.server_name,
             id="1234",
             namespaces={"users": [{"regex": r"@as_user.*", "exclusive": True}]},
             sender="@as:test",
@@ -80,7 +79,6 @@ class RegisterRestServletTestCase(unittest.HomeserverTestCase):
 
         appservice = ApplicationService(
             as_token,
-            self.hs.config.server.server_name,
             id="1234",
             namespaces={"users": [{"regex": r"@as_user.*", "exclusive": True}]},
             sender="@as:test",
diff --git a/tests/rest/client/test_room_batch.py b/tests/rest/client/test_room_batch.py
index 1b7ee08ab2..9d5cb60d16 100644
--- a/tests/rest/client/test_room_batch.py
+++ b/tests/rest/client/test_room_batch.py
@@ -71,7 +71,6 @@ class RoomBatchTestCase(unittest.HomeserverTestCase):
 
         self.appservice = ApplicationService(
             token="i_am_an_app_service",
-            hostname="test",
             id="1234",
             namespaces={"users": [{"regex": r"@as_user.*", "exclusive": True}]},
             # Note: this user does not have to match the regex above
diff --git a/tests/storage/test_user_directory.py b/tests/storage/test_user_directory.py
index 7f1964eb6a..5b60cf5285 100644
--- a/tests/storage/test_user_directory.py
+++ b/tests/storage/test_user_directory.py
@@ -134,7 +134,6 @@ class UserDirectoryInitialPopulationTestcase(HomeserverTestCase):
     def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
         self.appservice = ApplicationService(
             token="i_am_an_app_service",
-            hostname="test",
             id="1234",
             namespaces={"users": [{"regex": r"@as_user.*", "exclusive": True}]},
             sender="@as:test",
diff --git a/tests/test_mau.py b/tests/test_mau.py
index 5bbc361aa2..f14fcb7db9 100644
--- a/tests/test_mau.py
+++ b/tests/test_mau.py
@@ -105,7 +105,6 @@ class TestMauLimit(unittest.HomeserverTestCase):
         self.store.services_cache.append(
             ApplicationService(
                 token=as_token,
-                hostname=self.hs.hostname,
                 id="SomeASID",
                 sender="@as_sender:test",
                 namespaces={"users": [{"regex": "@as_*", "exclusive": True}]},
@@ -251,7 +250,6 @@ class TestMauLimit(unittest.HomeserverTestCase):
         self.store.services_cache.append(
             ApplicationService(
                 token=as_token_1,
-                hostname=self.hs.hostname,
                 id="SomeASID",
                 sender="@as_sender_1:test",
                 namespaces={"users": [{"regex": "@as_1.*", "exclusive": True}]},
@@ -262,7 +260,6 @@ class TestMauLimit(unittest.HomeserverTestCase):
         self.store.services_cache.append(
             ApplicationService(
                 token=as_token_2,
-                hostname=self.hs.hostname,
                 id="AnotherASID",
                 sender="@as_sender_2:test",
                 namespaces={"users": [{"regex": "@as_2.*", "exclusive": True}]},