FIX: indirectly muted categories for topic-tracking-state (#16067)

Topics belonging to indirectly muted categories should be excluded from topic-tracking-state report.

app/models/category_user.rb

@@ -235,26 +235,37 @@ class CategoryUser < ActiveRecord::Base
     end
   end
 
-  def self.indirectly_muted_category_ids(user)
-    query = Category.where.not(parent_category_id: nil)
+  def self.muted_category_ids_query(user, include_direct: false)
+    query = Category
+    query = query.where.not(parent_category_id: nil) if !include_direct
+    query = query
       .joins("LEFT JOIN categories categories2 ON categories2.id = categories.parent_category_id")
       .joins("LEFT JOIN category_users ON category_users.category_id = categories.id AND category_users.user_id = #{user.id}")
       .joins("LEFT JOIN category_users category_users2 ON category_users2.category_id = categories2.id AND category_users2.user_id = #{user.id}")
-      .where("category_users.id IS NULL")
 
+    direct_category_muted_sql = "COALESCE(category_users.notification_level, #{CategoryUser.default_notification_level}) = #{CategoryUser.notification_levels[:muted]}"
+    parent_category_muted_sql =
+      "(category_users.id IS NULL AND COALESCE(category_users2.notification_level, #{CategoryUser.default_notification_level}) = #{notification_levels[:muted]})"
+
+    conditions = [parent_category_muted_sql]
+    conditions.push(direct_category_muted_sql) if include_direct
     if SiteSetting.max_category_nesting === 3
       query = query
         .joins("LEFT JOIN categories categories3 ON categories3.id = categories2.parent_category_id")
         .joins("LEFT JOIN category_users category_users3 ON category_users3.category_id = categories3.id AND category_users3.user_id = #{user.id}")
-        .where("
-          (category_users2.notification_level = #{notification_levels[:muted]})
-          OR
-          (category_users2.id IS NULL AND category_users3.notification_level = #{notification_levels[:muted]})
-      ")
-    else
-      query = query.where("category_users2.notification_level = #{notification_levels[:muted]}")
+      grandparent_category_muted_sql = "(category_users.id IS NULL AND category_users2.id IS NULL AND COALESCE(category_users3.notification_level, #{CategoryUser.default_notification_level}) = #{notification_levels[:muted]})"
+      conditions.push(grandparent_category_muted_sql)
     end
-    query.pluck("categories.id")
+
+    query.where(conditions.join(" OR "))
+  end
+
+  def self.muted_category_ids(user)
+    muted_category_ids_query(user, include_direct: true).pluck("categories.id")
+  end
+
+  def self.indirectly_muted_category_ids(user)
+    muted_category_ids_query(user).pluck("categories.id")
   end
 end