Merge tag 'v1.10.0'

Synapse 1.10.0 (2020-02-12)
===========================

**WARNING to client developers**: As of this release Synapse validates `client_secret` parameters in the Client-Server API as per the spec. See [\#6766](https://github.com/matrix-org/synapse/issues/6766) for details.

Updates to the Docker image
---------------------------

- Update the docker images to Alpine Linux 3.11. ([\#6897](https://github.com/matrix-org/synapse/issues/6897))

Synapse 1.10.0rc5 (2020-02-11)
==============================

Bugfixes
--------

- Fix the filtering introduced in 1.10.0rc3 to also apply to the state blocks returned by `/sync`. ([\#6884](https://github.com/matrix-org/synapse/issues/6884))

Synapse 1.10.0rc4 (2020-02-11)
==============================

This release candidate was built incorrectly and is superceded by 1.10.0rc5.

Synapse 1.10.0rc3 (2020-02-10)
==============================

Features
--------

- Filter out `m.room.aliases` from the CS API to mitigate abuse while a better solution is specced. ([\#6878](https://github.com/matrix-org/synapse/issues/6878))

Internal Changes
----------------

- Fix continuous integration failures with old versions of `pip`, which were introduced by a release of the `zipp` library. ([\#6880](https://github.com/matrix-org/synapse/issues/6880))

Synapse 1.10.0rc2 (2020-02-06)
==============================

Bugfixes
--------

- Fix an issue with cross-signing where device signatures were not sent to remote servers. ([\#6844](https://github.com/matrix-org/synapse/issues/6844))
- Fix to the unknown remote device detection which was introduced in 1.10.rc1. ([\#6848](https://github.com/matrix-org/synapse/issues/6848))

Internal Changes
----------------

- Detect unexpected sender keys on remote encrypted events and resync device lists. ([\#6850](https://github.com/matrix-org/synapse/issues/6850))

Synapse 1.10.0rc1 (2020-01-31)
==============================

Features
--------

- Add experimental support for updated authorization rules for aliases events, from [MSC2260](https://github.com/matrix-org/matrix-doc/pull/2260). ([\#6787](https://github.com/matrix-org/synapse/issues/6787), [\#6790](https://github.com/matrix-org/synapse/issues/6790), [\#6794](https://github.com/matrix-org/synapse/issues/6794))

Bugfixes
--------

- Warn if postgres database has a non-C locale, as that can cause issues when upgrading locales (e.g. due to upgrading OS). ([\#6734](https://github.com/matrix-org/synapse/issues/6734))
- Minor fixes to `PUT /_synapse/admin/v2/users` admin api. ([\#6761](https://github.com/matrix-org/synapse/issues/6761))
- Validate `client_secret` parameter using the regex provided by the Client-Server API, temporarily allowing `:` characters for older clients. The `:` character will be removed in a future release. ([\#6767](https://github.com/matrix-org/synapse/issues/6767))
- Fix persisting redaction events that have been redacted (or otherwise don't have a redacts key). ([\#6771](https://github.com/matrix-org/synapse/issues/6771))
- Fix outbound federation request metrics. ([\#6795](https://github.com/matrix-org/synapse/issues/6795))
- Fix bug where querying a remote user's device keys that weren't cached resulted in only returning a single device. ([\#6796](https://github.com/matrix-org/synapse/issues/6796))
- Fix race in federation sender worker that delayed sending of device updates. ([\#6799](https://github.com/matrix-org/synapse/issues/6799), [\#6800](https://github.com/matrix-org/synapse/issues/6800))
- Fix bug where Synapse didn't invalidate cache of remote users' devices when Synapse left a room. ([\#6801](https://github.com/matrix-org/synapse/issues/6801))
- Fix waking up other workers when remote server is detected to have come back online. ([\#6811](https://github.com/matrix-org/synapse/issues/6811))

Improved Documentation
----------------------

- Clarify documentation related to `user_dir` and `federation_reader` workers. ([\#6775](https://github.com/matrix-org/synapse/issues/6775))

Internal Changes
----------------

- Record room versions in the `rooms` table. ([\#6729](https://github.com/matrix-org/synapse/issues/6729), [\#6788](https://github.com/matrix-org/synapse/issues/6788), [\#6810](https://github.com/matrix-org/synapse/issues/6810))
- Propagate cache invalidates from workers to other workers. ([\#6748](https://github.com/matrix-org/synapse/issues/6748))
- Remove some unnecessary admin handler abstraction methods. ([\#6751](https://github.com/matrix-org/synapse/issues/6751))
- Add some debugging for media storage providers. ([\#6757](https://github.com/matrix-org/synapse/issues/6757))
- Detect unknown remote devices and mark cache as stale. ([\#6776](https://github.com/matrix-org/synapse/issues/6776), [\#6819](https://github.com/matrix-org/synapse/issues/6819))
- Attempt to resync remote users' devices when detected as stale. ([\#6786](https://github.com/matrix-org/synapse/issues/6786))
- Delete current state from the database when server leaves a room. ([\#6792](https://github.com/matrix-org/synapse/issues/6792))
- When a client asks for a remote user's device keys check if the local cache for that user has been marked as potentially stale. ([\#6797](https://github.com/matrix-org/synapse/issues/6797))
- Add background update to clean out left rooms from current state. ([\#6802](https://github.com/matrix-org/synapse/issues/6802), [\#6816](https://github.com/matrix-org/synapse/issues/6816))
- Refactoring work in preparation for changing the event redaction algorithm. ([\#6803](https://github.com/matrix-org/synapse/issues/6803), [\#6805](https://github.com/matrix-org/synapse/issues/6805), [\#6806](https://github.com/matrix-org/synapse/issues/6806), [\#6807](https://github.com/matrix-org/synapse/issues/6807), [\#6820](https://github.com/matrix-org/synapse/issues/6820))

1 files changed, 36 insertions, 1 deletions

diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index 07d1c5bcf0..f70f5032fb 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -12,8 +12,9 @@
 # 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.
-
+import collections
 import re
+from typing import Mapping, Union
 
 from six import string_types
 
@@ -422,3 +423,37 @@ class EventClientSerializer(object):
         return yieldable_gather_results(
             self.serialize_event, events, time_now=time_now, **kwargs
         )
+
+
+def copy_power_levels_contents(
+    old_power_levels: Mapping[str, Union[int, Mapping[str, int]]]
+):
+    """Copy the content of a power_levels event, unfreezing frozendicts along the way
+
+    Raises:
+        TypeError if the input does not look like a valid power levels event content
+    """
+    if not isinstance(old_power_levels, collections.Mapping):
+        raise TypeError("Not a valid power-levels content: %r" % (old_power_levels,))
+
+    power_levels = {}
+    for k, v in old_power_levels.items():
+
+        if isinstance(v, int):
+            power_levels[k] = v
+            continue
+
+        if isinstance(v, collections.Mapping):
+            power_levels[k] = h = {}
+            for k1, v1 in v.items():
+                # we should only have one level of nesting
+                if not isinstance(v1, int):
+                    raise TypeError(
+                        "Invalid power_levels value for %s.%s: %r" % (k, k1, v1)
+                    )
+                h[k1] = v1
+            continue
+
+        raise TypeError("Invalid power_levels value for %s: %r" % (k, v))
+
+    return power_levels