Add ability to filter followed accounts' posts by language (#19095)

spec/controllers/api/v1/accounts_controller_spec.rb

@@ -145,6 +145,17 @@ RSpec.describe Api::V1::AccountsController, type: :controller do
         expect(json[:showing_reblogs]).to be false
         expect(json[:notifying]).to be true
       end
+
+      it 'changes languages option' do
+        post :follow, params: { id: other_account.id, languages: %w(en es) }
+
+        json = body_as_json
+
+        expect(json[:following]).to be true
+        expect(json[:showing_reblogs]).to be false
+        expect(json[:notifying]).to be false
+        expect(json[:languages]).to match_array %w(en es)
+      end
     end
   end
 

spec/controllers/settings/exports/following_accounts_controller_spec.rb

@@ -11,7 +11,7 @@ describe Settings::Exports::FollowingAccountsController do
       sign_in user, scope: :user
       get :index, format: :csv
 
-      expect(response.body).to eq "Account address,Show boosts\nusername@domain,true\n"
+      expect(response.body).to eq "Account address,Show boosts,Notify on new posts,Languages\nusername@domain,true,false,\n"
     end
   end
 end

spec/lib/feed_manager_spec.rb

@@ -127,6 +127,18 @@ RSpec.describe FeedManager do
         reblog = Fabricate(:status, reblog: status, account: jeff)
         expect(FeedManager.instance.filter?(:home, reblog, alice)).to be true
       end
+
+      it 'returns true for German post when follow is set to English only' do
+        alice.follow!(bob, languages: %w(en))
+        status = Fabricate(:status, text: 'Hallo Welt', account: bob, language: 'de')
+        expect(FeedManager.instance.filter?(:home, status, alice)).to be true
+      end
+
+      it 'returns false for German post when follow is set to German' do
+        alice.follow!(bob, languages: %w(de))
+        status = Fabricate(:status, text: 'Hallo Welt', account: bob, language: 'de')
+        expect(FeedManager.instance.filter?(:home, status, alice)).to be false
+      end
     end
 
     context 'for mentions feed' do

spec/models/concerns/account_interactions_spec.rb

@@ -14,7 +14,7 @@ describe AccountInteractions do
     context 'account with Follow' do
       it 'returns { target_account_id => true }' do
         Fabricate(:follow, account: account, target_account: target_account)
-        is_expected.to eq(target_account_id => { reblogs: true, notify: false })
+        is_expected.to eq(target_account_id => { reblogs: true, notify: false, languages: nil })
       end
     end
 

spec/models/export_spec.rb

@@ -35,8 +35,8 @@ describe Export do
       results = export.strip.split("\n")
 
       expect(results.size).to eq 3
-      expect(results.first).to eq 'Account address,Show boosts'
-      expect(results.second).to eq 'one@local.host,true'
+      expect(results.first).to eq 'Account address,Show boosts,Notify on new posts,Languages'
+      expect(results.second).to eq 'one@local.host,true,false,'
     end
   end
 

spec/models/follow_request_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe FollowRequest, type: :model do
     let(:target_account) { Fabricate(:account) }
 
     it 'calls Account#follow!, MergeWorker.perform_async, and #destroy!' do
-      expect(account).to        receive(:follow!).with(target_account, reblogs: true, notify: false, uri: follow_request.uri, bypass_limit: true)
+      expect(account).to        receive(:follow!).with(target_account, reblogs: true, notify: false, uri: follow_request.uri, languages: nil, bypass_limit: true)
       expect(MergeWorker).to    receive(:perform_async).with(target_account.id, account.id)
       expect(follow_request).to receive(:destroy!)
       follow_request.authorize!

spec/services/follow_service_spec.rb

@@ -121,6 +121,19 @@ RSpec.describe FollowService, type: :service do
         expect(sender.muting_reblogs?(bob)).to be false
       end
     end
+
+    describe 'already followed account, changing languages' do
+      let(:bob) { Fabricate(:account, username: 'bob') }
+
+      before do
+        sender.follow!(bob)
+        subject.call(sender, bob, languages: %w(en es))
+      end
+
+      it 'changes languages' do
+        expect(Follow.find_by(account: sender, target_account: bob)&.languages).to match_array %w(en es)
+      end
+    end
   end
 
   context 'remote ActivityPub account' do

spec/workers/refollow_worker_spec.rb

@@ -23,8 +23,8 @@ describe RefollowWorker do
       result = subject.perform(account.id)
 
       expect(result).to be_nil
-      expect(service).to have_received(:call).with(alice, account, reblogs: true, notify: false, bypass_limit: true)
-      expect(service).to have_received(:call).with(bob, account, reblogs: false, notify: false, bypass_limit: true)
+      expect(service).to have_received(:call).with(alice, account, reblogs: true, notify: false, languages: nil, bypass_limit: true)
+      expect(service).to have_received(:call).with(bob, account, reblogs: false, notify: false, languages: nil, bypass_limit: true)
     end
   end
 end