Prior this fix a topic created in the future could generate this exception:
```
Job exception: ERROR: a negative number raised to a non-integer power yields a complex result
```
This fix and spec should ensure we don't consider topics in the future as the rest of the `update_scores` function is doing at other places.
It's February 29th, you know what that means...date-based flaky specs! If today is
February 29th 2024:
```
freeze_time(1.year.ago) -> Tue, 28 Feb 2023 01:38:42.732875000 UTC +00:00
```
Then
```
freeze_time(1.year.from_now) -> Wed, 28 Feb 2024 01:38:42.732875000 UTC +00:00
```
So then our "now" for the insert query ends up being "yesterday"
```
WHERE topic_hot_scores.topic_id IS NULL
AND topics.deleted_at IS NULL
AND topics.archetype <> :private_message
AND topics.created_at <= :now
```
When we insert into the hot set we add things with a score of 0
This means that if hot has more than batch size items in it with a score, then the 0s don't get an initial score
This corrects the situation by always ensuring we re-score:
1. batch size high scoring topics
2. (new) batch size recently bumped topics
* Update spec/models/topic_hot_scores_spec.rb
Co-authored-by: Isaac Janzen <50783505+janzenisaac@users.noreply.github.com>
---------
Co-authored-by: Isaac Janzen <50783505+janzenisaac@users.noreply.github.com>
1. Don't show visited line for hot filter, it is in random order
2. Don't count likes on non regular posts (eg: whispers / small actions)
3. Don't count participants in non regular posts
1. Serial likers will just like a bunch of posts on the same topic, this will
heavily inflate hot score. To avoid artificial "heat" generated by one user only count
the first like on the topic within the recent_cutoff range per topic
2. When looking at recent topics prefer "unique likers", defer to total likes on
older topics cause we do not have an easy count for unique likers
3. Stop taking 1 off like_count, it is not needed - platforms like reddit
allow you to like own post so they need to remove it.
- Decrease gravity, we come in too hot prioritizing too many new topics
- Remove all muted topics / categories and tags from the hot list
- Punish topics with zero likes in algorithm
This introduces a new experimental hot sort ordering.
It attempts to float top conversations by first prioritizing a topics with lots of recent activity (likes and users responding)
The schedule that updates hot topics is disabled unless the hidden site setting: `experimental_hot_topics` is enabled.
You can control "decay" with `hot_topic_gravity` and `recency` with `hot_topics_recent_days`
Data is stored in the new `topic_hot_scores` table and you can check it out on the `/hot` route once
enabled.
---------
Co-authored-by: Penar Musaraj <pmusaraj@gmail.com>
