Filter on allowed user language preferences (#2361)

* Naive approached to timeline filtering

* Convert allowed_languages into a db column

* Allow users to choose languages to see statuses in

* Style list items as two columns

* Add a hint to explain language filtering preference

2 files changed, 30 insertions, 3 deletions

diff --git a/spec/controllers/settings/preferences_controller_spec.rb b/spec/controllers/settings/preferences_controller_spec.rb
index 92b626d2d..432e35cd4 100644
--- a/spec/controllers/settings/preferences_controller_spec.rb
+++ b/spec/controllers/settings/preferences_controller_spec.rb
@@ -3,7 +3,7 @@ require 'rails_helper'
 describe Settings::PreferencesController do
   render_views
 
-  let(:user) { Fabricate(:user) }
+  let(:user) { Fabricate(:user, allowed_languages: []) }
 
   before do
     sign_in user, scope: :user
@@ -18,10 +18,12 @@ describe Settings::PreferencesController do
 
   describe 'PUT #update' do
     it 'updates the user record' do
-      put :update, params: { user: { locale: 'en' } }
+      put :update, params: { user: { locale: 'en', allowed_languages: ['es', 'fr'] } }
 
       expect(response).to redirect_to(settings_preferences_path)
-      expect(user.reload.locale).to eq 'en'
+      user.reload
+      expect(user.locale).to eq 'en'
+      expect(user.allowed_languages).to eq ['es', 'fr']
     end
 
     it 'updates user settings' do
diff --git a/spec/models/status_spec.rb b/spec/models/status_spec.rb
index c553b052e..0c0b16829 100644
--- a/spec/models/status_spec.rb
+++ b/spec/models/status_spec.rb
@@ -251,6 +251,31 @@ RSpec.describe Status, type: :model do
         expect(results).not_to include(muted_status)
       end
 
+      context 'with language preferences' do
+        it 'excludes statuses in languages not allowed by the account user' do
+          user = Fabricate(:user, allowed_languages: [:en, :es])
+          @account.update(user: user)
+          en_status = Fabricate(:status, language: 'en')
+          es_status = Fabricate(:status, language: 'es')
+          fr_status = Fabricate(:status, language: 'fr')
+
+          results = Status.as_public_timeline(@account)
+          expect(results).to include(en_status)
+          expect(results).to include(es_status)
+          expect(results).not_to include(fr_status)
+        end
+
+        it 'includes all languages when account does not have a user' do
+          expect(@account.user).to be_nil
+          en_status = Fabricate(:status, language: 'en')
+          es_status = Fabricate(:status, language: 'es')
+
+          results = Status.as_public_timeline(@account)
+          expect(results).to include(en_status)
+          expect(results).to include(es_status)
+        end
+      end
+
       context 'where that account is silenced' do
         it 'includes statuses from other accounts that are silenced' do
           @account.update(silenced: true)