* Rework the banning and unbanning of entities in PolicyLists.
1. We keep track of the event that created a list rule so that we
can remove the rule by having a way to determine the original state key for the rule.
This is because the state key of rules can be anything and should not be
relied on by Mjolnir to unban things (which it was doing).
2. The old scheme for producing a state key was causing for some entities to escape bans
https://github.com/matrix-org/mjolnir/issues/322.
We could have used a hash or something similar, but we know that
the reason for the `rule:${entity}` scheme existed was for ease of debugging
and finding rules in devtools. So instead we have followed a scheme simalar to
bridges where the first character of an mxid is replaced with an underscore.
Everything else just gets put into the state key. Since domains can't have '@'
and room ids, aliases can't either.
3. We have stopped the need for Mjolnir to wait for the next response from sync after banning,
unbanning an entity so that we can apply ACL's sooner.
* Use PolicyList's `banEntity` method to create imported rules.
Towards opinions in PolicyLists.
This changeset is part of an ongoing effort to implement "opinions"
within policy lists, as per MSC3847.
For the time being:
- we rename BanList into PolicyList;
- we cleanup a little dead code;
- we replace a few `string`s with `enum`;
- `ListRule` becomes an abstract class with two concrete subclasses `ListRuleBan` and `ListRuleOpinion`.
They have been in the spec for ~3 years now and most mjolnirs should be
able to handle them. Let's use the stable endpoint now, so that other
moderation tools don't need to implement the legacy identifier to handle
new bans at some point.
Signed-off-by: Nicolas Werner <nicolas.werner@hotmail.de>
* Test for batching ACL.
* Batch events from sync within BanList.
* Introduce the BanList.batch event to the BanList emitter to let Mjolnir sync after new events have been added from sync.
Fixes#203
This is an experimental ruleserver that will serve the combined rules from
the active policy lists to a Synapse module over a web api.
This makes it easier to communicate changes in policy lists to Synapse workers
that do not have an immediate view over all of the policy rooms at
the same time.
This also allows us to express moderation actions to the homeserver
beyond what is currently expressible via MSC2313 policy
lists.
We do this so that there is only one source of truth for which rules
are active and it simplifies de-duplicating rules of conflicting event
types (e.g. m.room.rule.user vs m.policy.rule.user).
The reason for doing this is because otherwise there may be duplicate
rules under different state types for the same entity.
This simplifies the process of modifying or invalidating rules affecting
an entity because the rule with the most recent type will always be
preferred.
Only shows changes to lists made by other accounts (than the one used by Mjolnir).
Displays when rules are added, removed and modified by either replacing the state event or redacting them.
