* FEATURE: Enforce mention limits for chat messages
The first part of these changes adds a new setting called `max_mentions_per_chat_message`, which skips notifications when the message contains too many mentions. It also respects the `max_users_notified_per_group_mention` setting
and skips notifications if expanding a group mention would exceed it.
We also include a new component to display JIT warning for these limits to the user while composing a message.
* Simplify ignoring/muting filter in chat_notifier
* Post-send warnings for unsent warnings
* Improve pluralization
* Address review feedback
* Fix test
* Address second feedback round
* Third round of feedback
Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
Only allow maximum of 6000 characters for chat messages when they
are created or edited. A hidden setting can control this limit,
6000 is the default.
There is also a migration here to truncate any existing messages to
6000 characters if the message is already over that and if the
chat_messages table exists. We also set cooked_version to NULL
for those messages so we can identify them for rebake.
By doing this, we will:
* Have an open, but safe default People reach `@trust_level_1` pretty
quickly, but `@trust_level_0` is still excluded by default, to limit new
accounts joining and immediately spamming or otherwise abusing channels.
* Make it easier to change the default By keeping `@staff` in the
default, we make it easy for admins to remove `@trust_level_1` and
optionally add additional groups to their liking.
This setting limits the number of users in a direct message. 0 means you can only create a direct message with yourself.
Co-authored-by: David McClure <dave@xerotrope.org>