Restructure omni services and add Chatwoot research snapshot

research/chatwoot/spec/models/concerns/switch_locale_spec.rb

@@ -0,0 +1,95 @@
+require 'rails_helper'
+
+RSpec.describe 'SwitchLocale Concern', type: :controller do
+  controller(ApplicationController) do
+    include SwitchLocale
+
+    def index
+      switch_locale { render plain: I18n.locale }
+    end
+
+    def account_locale
+      switch_locale_using_account_locale { render plain: I18n.locale }
+    end
+  end
+
+  let(:account) { create(:account, locale: 'es') }
+  let(:portal) { create(:portal, custom_domain: 'custom.example.com', config: { default_locale: 'fr_FR' }) }
+
+  describe '#switch_locale' do
+    context 'when locale is provided in params' do
+      it 'sets locale from params' do
+        get :index, params: { locale: 'es' }
+        expect(response.body).to eq('es')
+      end
+
+      it 'falls back to default locale if invalid' do
+        get :index, params: { locale: 'invalid' }
+        expect(response.body).to eq('en')
+      end
+    end
+
+    context 'when user has a locale set in ui_settings' do
+      let(:user) { create(:user, ui_settings: { 'locale' => 'es' }) }
+
+      before { controller.instance_variable_set(:@user, user) }
+
+      it 'returns the user locale' do
+        expect(controller.send(:locale_from_user)).to eq('es')
+      end
+    end
+
+    context 'when user does not have a locale set' do
+      let(:user) { create(:user, ui_settings: {}) }
+
+      before { controller.instance_variable_set(:@user, user) }
+
+      it 'returns nil' do
+        expect(controller.send(:locale_from_user)).to be_nil
+      end
+    end
+
+    context 'when request is from custom domain' do
+      before { request.host = portal.custom_domain }
+
+      it 'sets locale from portal' do
+        get :index
+        expect(response.body).to eq('fr')
+      end
+
+      it 'overrides portal locale with param' do
+        get :index, params: { locale: 'es' }
+        expect(response.body).to eq('es')
+      end
+    end
+
+    context 'when locale is not provided anywhere' do
+      it 'sets locale from environment variable' do
+        with_modified_env(DEFAULT_LOCALE: 'de_DE') do
+          get :index
+          expect(response.body).to eq('de')
+        end
+      end
+
+      it 'falls back to default locale if env locale invalid' do
+        with_modified_env(DEFAULT_LOCALE: 'invalid') do
+          get :index
+          expect(response.body).to eq('en')
+        end
+      end
+    end
+  end
+
+  describe '#switch_locale_using_account_locale' do
+    it 'sets locale from account' do
+      controller.instance_variable_set(:@current_account, account)
+
+      result = nil
+      controller.send(:switch_locale_using_account_locale) do
+        result = I18n.locale.to_s
+      end
+
+      expect(result).to eq('es')
+    end
+  end
+end