WIP: Fixed :site_query_categories event hook

app/controllers/groups_controller.rb

@@ -80,6 +80,11 @@ class GroupsController < ApplicationController
       type_filters = type_filters - %i[my owner]
     end
 
+    modifiers = []
+    # some plugins may need to change the query
+    DiscourseEvent.trigger(:query_groups_list, modifiers, groups, @guardian, params)
+    modifiers.each { |mod| groups = mod.call(groups) }
+
     type_filters.delete(:non_automatic)
 
     # count the total before doing pagination

app/models/category_list.rb

@@ -121,6 +121,11 @@ class CategoryList
 
     @categories = self.class.order_categories(@categories)
 
+    modifiers = []
+    # some plugins may need to change the categories cached on site load
+    DiscourseEvent.trigger(:query_categories_list, modifiers, @categories, @guardian, @options)
+    modifiers.each { |mod| @categories = mod.call(@categories) }
+
     @categories = @categories.to_a
 
     include_subcategories = @options[:include_subcategories] == true

app/models/site.rb

@@ -71,19 +71,28 @@ class Site
       .cache
       .fetch(categories_cache_key, expires_in: 30.minutes) do
         categories =
-          Category
-            .includes(
-              :uploaded_logo,
-              :uploaded_logo_dark,
-              :uploaded_background,
-              :tags,
-              :tag_groups,
-              category_required_tag_groups: :tag_group,
-            )
-            .joins("LEFT JOIN topics t on t.id = categories.topic_id")
-            .select("categories.*, t.slug topic_slug")
-            .order(:position)
-            .to_a
+          begin
+            query =
+              Category
+                .includes(
+                  :uploaded_logo,
+                  :uploaded_logo_dark,
+                  :uploaded_background,
+                  :tags,
+                  :tag_groups,
+                  category_required_tag_groups: :tag_group,
+                )
+                .joins("LEFT JOIN topics t on t.id = categories.topic_id")
+                .select("categories.*, t.slug topic_slug")
+                .order(:position)
+
+            modifiers = []
+            # some plugins may need to change the categories cached on site load
+            DiscourseEvent.trigger(:site_query_categories, modifiers, query, @guardian)
+            modifiers.each { |mod| query = mod.call(query) }
+
+            query.to_a
+          end
 
         if preloaded_category_custom_fields.present?
           Category.preload_custom_fields(categories, preloaded_category_custom_fields)