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-rw-r--r--changelog.d/11933.feature1
-rw-r--r--docs/upgrade.md19
-rw-r--r--synapse/rest/client/capabilities.py15
-rw-r--r--tests/rest/client/test_capabilities.py69
4 files changed, 55 insertions, 49 deletions
diff --git a/changelog.d/11933.feature b/changelog.d/11933.feature
new file mode 100644
index 0000000000..2b1b0d1786
--- /dev/null
+++ b/changelog.d/11933.feature
@@ -0,0 +1 @@
+Support the stable API endpoint for [MSC3283](https://github.com/matrix-org/matrix-doc/pull/3283): new settings in `/capabilities` endpoint.
diff --git a/docs/upgrade.md b/docs/upgrade.md
index 581fd7de53..c5e0697333 100644
--- a/docs/upgrade.md
+++ b/docs/upgrade.md
@@ -100,6 +100,25 @@ to:
 
 Please update any relevant reverse proxy or firewall configurations appropriately.
 
+## Deprecation of `capability` `org.matrix.msc3283.*`
+
+The `capabilities` of MSC3283 from the REST API `/_matrix/client/r0/capabilities`
+becomes stable.
+
+The old `capabilities`
+- `org.matrix.msc3283.set_displayname`,
+- `org.matrix.msc3283.set_avatar_url` and
+- `org.matrix.msc3283.3pid_changes`
+
+are deprecated and scheduled to be removed in Synapse v1.(next+1).0.
+
+The new `capabilities`
+- `m.set_displayname`,
+- `m.set_avatar_url` and
+- `m.3pid_changes`
+
+are now active by default.
+
 # Upgrading to v1.53.0
 
 ## Dropping support for `webclient` listeners and non-HTTP(S) `web_client_location`
diff --git a/synapse/rest/client/capabilities.py b/synapse/rest/client/capabilities.py
index 5c0e3a5680..6682da077a 100644
--- a/synapse/rest/client/capabilities.py
+++ b/synapse/rest/client/capabilities.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
+from http import HTTPStatus
 from typing import TYPE_CHECKING, Tuple
 
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, MSC3244_CAPABILITIES
@@ -54,6 +55,15 @@ class CapabilitiesRestServlet(RestServlet):
                     },
                 },
                 "m.change_password": {"enabled": change_password},
+                "m.set_displayname": {
+                    "enabled": self.config.registration.enable_set_displayname
+                },
+                "m.set_avatar_url": {
+                    "enabled": self.config.registration.enable_set_avatar_url
+                },
+                "m.3pid_changes": {
+                    "enabled": self.config.registration.enable_3pid_changes
+                },
             }
         }
 
@@ -62,6 +72,9 @@ class CapabilitiesRestServlet(RestServlet):
                 "org.matrix.msc3244.room_capabilities"
             ] = MSC3244_CAPABILITIES
 
+        # Must be removed in later versions.
+        # Is only included for migration.
+        # Also the parts in `synapse/config/experimental.py`.
         if self.config.experimental.msc3283_enabled:
             response["capabilities"]["org.matrix.msc3283.set_displayname"] = {
                 "enabled": self.config.registration.enable_set_displayname
@@ -76,7 +89,7 @@ class CapabilitiesRestServlet(RestServlet):
         if self.config.experimental.msc3440_enabled:
             response["capabilities"]["io.element.thread"] = {"enabled": True}
 
-        return 200, response
+        return HTTPStatus.OK, response
 
 
 def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
diff --git a/tests/rest/client/test_capabilities.py b/tests/rest/client/test_capabilities.py
index 249808b031..989e801768 100644
--- a/tests/rest/client/test_capabilities.py
+++ b/tests/rest/client/test_capabilities.py
@@ -11,6 +11,8 @@
 # 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 http import HTTPStatus
+
 import synapse.rest.admin
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
 from synapse.rest.client import capabilities, login
@@ -28,7 +30,7 @@ class CapabilitiesTestCase(unittest.HomeserverTestCase):
     ]
 
     def make_homeserver(self, reactor, clock):
-        self.url = b"/_matrix/client/r0/capabilities"
+        self.url = b"/capabilities"
         hs = self.setup_test_homeserver()
         self.config = hs.config
         self.auth_handler = hs.get_auth_handler()
@@ -96,39 +98,20 @@ class CapabilitiesTestCase(unittest.HomeserverTestCase):
         self.assertEqual(channel.code, 200)
         self.assertFalse(capabilities["m.change_password"]["enabled"])
 
-    def test_get_change_users_attributes_capabilities_when_msc3283_disabled(self):
-        """Test that per default msc3283 is disabled server returns `m.change_password`."""
+    def test_get_change_users_attributes_capabilities(self):
+        """Test that server returns capabilities by default."""
         access_token = self.login(self.localpart, self.password)
 
         channel = self.make_request("GET", self.url, access_token=access_token)
         capabilities = channel.json_body["capabilities"]
 
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, HTTPStatus.OK)
         self.assertTrue(capabilities["m.change_password"]["enabled"])
-        self.assertNotIn("org.matrix.msc3283.set_displayname", capabilities)
-        self.assertNotIn("org.matrix.msc3283.set_avatar_url", capabilities)
-        self.assertNotIn("org.matrix.msc3283.3pid_changes", capabilities)
-
-    @override_config({"experimental_features": {"msc3283_enabled": True}})
-    def test_get_change_users_attributes_capabilities_when_msc3283_enabled(self):
-        """Test if msc3283 is enabled server returns capabilities."""
-        access_token = self.login(self.localpart, self.password)
-
-        channel = self.make_request("GET", self.url, access_token=access_token)
-        capabilities = channel.json_body["capabilities"]
+        self.assertTrue(capabilities["m.set_displayname"]["enabled"])
+        self.assertTrue(capabilities["m.set_avatar_url"]["enabled"])
+        self.assertTrue(capabilities["m.3pid_changes"]["enabled"])
 
-        self.assertEqual(channel.code, 200)
-        self.assertTrue(capabilities["m.change_password"]["enabled"])
-        self.assertTrue(capabilities["org.matrix.msc3283.set_displayname"]["enabled"])
-        self.assertTrue(capabilities["org.matrix.msc3283.set_avatar_url"]["enabled"])
-        self.assertTrue(capabilities["org.matrix.msc3283.3pid_changes"]["enabled"])
-
-    @override_config(
-        {
-            "enable_set_displayname": False,
-            "experimental_features": {"msc3283_enabled": True},
-        }
-    )
+    @override_config({"enable_set_displayname": False})
     def test_get_set_displayname_capabilities_displayname_disabled(self):
         """Test if set displayname is disabled that the server responds it."""
         access_token = self.login(self.localpart, self.password)
@@ -136,15 +119,10 @@ class CapabilitiesTestCase(unittest.HomeserverTestCase):
         channel = self.make_request("GET", self.url, access_token=access_token)
         capabilities = channel.json_body["capabilities"]
 
-        self.assertEqual(channel.code, 200)
-        self.assertFalse(capabilities["org.matrix.msc3283.set_displayname"]["enabled"])
-
-    @override_config(
-        {
-            "enable_set_avatar_url": False,
-            "experimental_features": {"msc3283_enabled": True},
-        }
-    )
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertFalse(capabilities["m.set_displayname"]["enabled"])
+
+    @override_config({"enable_set_avatar_url": False})
     def test_get_set_avatar_url_capabilities_avatar_url_disabled(self):
         """Test if set avatar_url is disabled that the server responds it."""
         access_token = self.login(self.localpart, self.password)
@@ -152,24 +130,19 @@ class CapabilitiesTestCase(unittest.HomeserverTestCase):
         channel = self.make_request("GET", self.url, access_token=access_token)
         capabilities = channel.json_body["capabilities"]
 
-        self.assertEqual(channel.code, 200)
-        self.assertFalse(capabilities["org.matrix.msc3283.set_avatar_url"]["enabled"])
-
-    @override_config(
-        {
-            "enable_3pid_changes": False,
-            "experimental_features": {"msc3283_enabled": True},
-        }
-    )
-    def test_change_3pid_capabilities_3pid_disabled(self):
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertFalse(capabilities["m.set_avatar_url"]["enabled"])
+
+    @override_config({"enable_3pid_changes": False})
+    def test_get_change_3pid_capabilities_3pid_disabled(self):
         """Test if change 3pid is disabled that the server responds it."""
         access_token = self.login(self.localpart, self.password)
 
         channel = self.make_request("GET", self.url, access_token=access_token)
         capabilities = channel.json_body["capabilities"]
 
-        self.assertEqual(channel.code, 200)
-        self.assertFalse(capabilities["org.matrix.msc3283.3pid_changes"]["enabled"])
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertFalse(capabilities["m.3pid_changes"]["enabled"])
 
     @override_config({"experimental_features": {"msc3244_enabled": False}})
     def test_get_does_not_include_msc3244_fields_when_disabled(self):