The `use_helpers` method was added in ViewComponent 3.8.0, and it's
included by default in all components since version 3.11.0.
Note we sometimes delegated the `can?` method to the controller instead
of the helpers, for no particularly reason. We're unifying that code as
well.
We were already doing so for debates and investments.
We probably never noticed because this is an edge case that requires
enabling a feature, people adding comments, and then disabling the
feature.
It could be argued that seeing which proposals a user follows is a good
indicator of which proposals a user has supported, since we're
automatically creating follows for supported proposals since commit
74fbde09f. So now, we're extending the `public_interests` funcionality,
so it only shows elements users are following if they've enabled it.
This is an improvement over using the `public_activity` attribute in two
ways:
* The `public_interests` attribute is disabled by default, so by default
other users won't be able to see what a user is following
* Who has created proposals/debates/investments/comments is public
information, while who is following which elements is not; so enabling
`public_activity` shouldn't imply potentially private information should
be displayed as well
We've considered removing the `public_interests` attribute completely
and just hiding the "following" page for everyone except its owner, but
keeping it provides more compatibility with existing installations.
We had similar conditions many times and some duplication, particularly
between the code getting records and the code counting records. We can
remove it by returning a generic scope and calling the `count` method to
count the records and the `order` and `page` methods when we want to
pass the records to the view. And, since we only display one partial per
request, we can simplify the code to render all the partials. There's
one minor disadvantage to this approach: searching the code for the
place where these partials are rendered is now a bit harder since
searching the code for something like "render (.+) budget_investments"
won't return any results.
We're also writing conditions about a certain filter just once, by
setting `valid_filters`. This greatly simplifies the logic, although
again there's one minor disadvantage: we have to implement the
`current_filter` method, duplicating the logic already defined in the
`HasFilters` concern.
