Merge pull request from GHSA-58x8-3qxw-6hm7

* Fix insufficient permission checking for public timeline endpoints

Note that this changes unauthenticated access failure code from 401 to 422

* Add more tests for public timelines

* Require user token in `/api/v1/statuses/:id/translate` and `/api/v1/scheduled_statuses`

spec/controllers/api/v1/statuses/translations_controller_spec.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe Api::V1::Statuses::TranslationsController do
+  render_views
+
+  let(:user)  { Fabricate(:user) }
+  let(:app)   { Fabricate(:application, name: 'Test app', website: 'http://testapp.com') }
+  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'read:statuses', application: app) }
+
+  context 'with an application token' do
+    let(:token) { Fabricate(:accessible_access_token, resource_owner_id: nil, scopes: 'read:statuses', application: app) }
+
+    before do
+      allow(controller).to receive(:doorkeeper_token) { token }
+    end
+
+    describe 'POST /api/v1/statuses/:status_id/translate' do
+      let(:status) { Fabricate(:status, account: user.account, text: 'Hola', language: 'es') }
+
+      before do
+        post :create, params: { status_id: status.id }
+      end
+
+      it 'returns http unprocessable entity' do
+        expect(response).to have_http_status(422)
+      end
+    end
+  end
+
+  context 'with an oauth token' do
+    before do
+      allow(controller).to receive(:doorkeeper_token) { token }
+    end
+
+    describe 'POST #create' do
+      let(:status) { Fabricate(:status, account: user.account, text: 'Hola', language: 'es') }
+
+      before do
+        translation = TranslationService::Translation.new(text: 'Hello')
+        service = instance_double(TranslationService::DeepL, translate: translation)
+        allow(TranslationService).to receive_messages(configured?: true, configured: service)
+        Rails.cache.write('translation_service/languages', { 'es' => ['en'] })
+        post :create, params: { status_id: status.id }
+      end
+
+      it 'returns http success' do
+        expect(response).to have_http_status(200)
+      end
+    end
+  end
+end