This feature allows @ mentions to prioritize showing members of a group who
have explicit permission to a category.
This makes it far easier to @ mention group member when composing topics in
categories where only the group has access.
For example:
If Sam, Jane an Joan have access to bugs category.
Then `@` will auto complete to (jane,joan,sam) ordered on last seen at
This feature works on new topics and existing topics. There is an explicit
exclusion of trust level 0,1,2 groups cause they get too big.
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
Following this change when a user hits `@` and is replying to a topic they
will see usernames of people who were last seen and participated in the topic
This is somewhat experimental, we may tweak this, or make it optional.
Also, a regression in a423a938 where hitting TAB would eat a post you were writing:
Eg this would eat a post:
``` text
@hello, testing 123 <tab>
```
Also
- Significantly improved search ranking, title is treated most strongly
- Adds tag names to the index
- Run search re-indexer more aggressively
- Re-index topic and all posts on category change
If you allow a group to be mentioned it can be mentioned with the @ symbol.
Keep in mind as a safety mechanism max_users_notified_per_group_mention is set to 100
