Add trending statuses (#17431)

* Add trending statuses

* Fix dangling items with stale scores in localized sets

* Various fixes and improvements

- Change approve_all/reject_all to approve_accounts/reject_accounts
- Change Trends::Query methods to not mutate the original query
- Change Trends::Query#skip to offset
- Change follow recommendations to be refreshed in a transaction

* Add tests for trending statuses filtering behaviour

* Fix not applying filtering scope in controller

3 files changed, 33 insertions, 2 deletions

diff --git a/app/controllers/api/v1/trends/links_controller.rb b/app/controllers/api/v1/trends/links_controller.rb
index 1c3ab1e1c..ad20e7f8b 100644
--- a/app/controllers/api/v1/trends/links_controller.rb
+++ b/app/controllers/api/v1/trends/links_controller.rb
@@ -12,10 +12,14 @@ class Api::V1::Trends::LinksController < Api::BaseController
   def set_links
     @links = begin
       if Setting.trends
-        Trends.links.get(true, limit_param(10))
+        links_from_trends
       else
         []
       end
     end
   end
+
+  def links_from_trends
+    Trends.links.query.allowed.in_locale(content_locale).limit(limit_param(10))
+  end
 end
diff --git a/app/controllers/api/v1/trends/statuses_controller.rb b/app/controllers/api/v1/trends/statuses_controller.rb
new file mode 100644
index 000000000..d4ec97ae5
--- /dev/null
+++ b/app/controllers/api/v1/trends/statuses_controller.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class Api::V1::Trends::StatusesController < Api::BaseController
+  before_action :set_statuses
+
+  def index
+    render json: @statuses, each_serializer: REST::StatusSerializer
+  end
+
+  private
+
+  def set_statuses
+    @statuses = begin
+      if Setting.trends
+        cache_collection(statuses_from_trends, Status)
+      else
+        []
+      end
+    end
+  end
+
+  def statuses_from_trends
+    scope = Trends.statuses.query.allowed.in_locale(content_locale)
+    scope = scope.filtered_for(current_account) if user_signed_in?
+    scope.limit(limit_param(DEFAULT_STATUSES_LIMIT))
+  end
+end
diff --git a/app/controllers/api/v1/trends/tags_controller.rb b/app/controllers/api/v1/trends/tags_controller.rb
index 947b53de2..1334b72d2 100644
--- a/app/controllers/api/v1/trends/tags_controller.rb
+++ b/app/controllers/api/v1/trends/tags_controller.rb
@@ -12,7 +12,7 @@ class Api::V1::Trends::TagsController < Api::BaseController
   def set_tags
     @tags = begin
       if Setting.trends
-        Trends.tags.get(true, limit_param(10))
+        Trends.tags.query.allowed.limit(limit_param(10))
       else
         []
       end