Filter languages with opt out (#3175)

* Remove allowed_languages and add filtered_languages

* Use filtered_languages instead of allowed_languages

app/models/account.rb

@@ -99,7 +99,7 @@ class Account < ApplicationRecord
            prefix: true,
            allow_nil: true
 
-  delegate :allowed_languages, to: :user, prefix: false, allow_nil: true
+  delegate :filtered_languages, to: :user, prefix: false, allow_nil: true
 
   def local?
     domain.nil?

app/models/status.rb

@@ -142,8 +142,8 @@ class Status < ApplicationRecord
   before_validation :set_conversation
 
   class << self
-    def in_allowed_languages(account)
-      where(language: account.allowed_languages)
+    def not_in_filtered_languages(account)
+      where.not(language: account.filtered_languages)
     end
 
     def as_home_timeline(account)
@@ -234,7 +234,7 @@ class Status < ApplicationRecord
     def filter_timeline_for_account(query, account, local_only)
       query = query.not_excluded_by_account(account)
       query = query.not_domain_blocked_by_account(account) unless local_only
-      query = query.in_allowed_languages(account) if account.allowed_languages.present?
+      query = query.not_in_filtered_languages(account) if account.filtered_languages.present?
       query.merge(account_silencing_filter(account))
     end
 

app/models/user.rb

@@ -30,7 +30,7 @@
 #  otp_required_for_login    :boolean
 #  last_emailed_at           :datetime
 #  otp_backup_codes          :string           is an Array
-#  allowed_languages         :string           default([]), not null, is an Array
+#  filtered_languages        :string           default([]), not null, is an Array
 #
 
 class User < ApplicationRecord
@@ -83,6 +83,6 @@ class User < ApplicationRecord
   private
 
   def sanitize_languages
-    allowed_languages.reject!(&:blank?)
+    filtered_languages.reject!(&:blank?)
   end
 end