Restructure omni services and add Chatwoot research snapshot

research/chatwoot/spec/services/whatsapp/webhook_teardown_service_spec.rb

@@ -0,0 +1,84 @@
+require 'rails_helper'
+
+RSpec.describe Whatsapp::WebhookTeardownService do
+  describe '#perform' do
+    let(:channel) { create(:channel_whatsapp, validate_provider_config: false, sync_templates: false) }
+    let(:service) { described_class.new(channel) }
+
+    context 'when channel is whatsapp_cloud with embedded_signup' do
+      before do
+        # Stub webhook setup to prevent HTTP calls during channel update
+        allow(channel).to receive(:setup_webhooks).and_return(true)
+
+        channel.update!(
+          provider: 'whatsapp_cloud',
+          provider_config: {
+            'source' => 'embedded_signup',
+            'business_account_id' => 'test_waba_id',
+            'api_key' => 'test_api_key'
+          }
+        )
+      end
+
+      it 'calls unsubscribe_waba_webhook on Facebook API client' do
+        api_client = instance_double(Whatsapp::FacebookApiClient)
+        allow(Whatsapp::FacebookApiClient).to receive(:new).with('test_api_key').and_return(api_client)
+        allow(api_client).to receive(:unsubscribe_waba_webhook).with('test_waba_id')
+
+        service.perform
+
+        expect(api_client).to have_received(:unsubscribe_waba_webhook).with('test_waba_id')
+      end
+
+      it 'handles errors gracefully without raising' do
+        api_client = instance_double(Whatsapp::FacebookApiClient)
+        allow(Whatsapp::FacebookApiClient).to receive(:new).and_return(api_client)
+        allow(api_client).to receive(:unsubscribe_waba_webhook).and_raise(StandardError, 'API Error')
+
+        expect { service.perform }.not_to raise_error
+      end
+    end
+
+    context 'when channel is not whatsapp_cloud' do
+      before do
+        channel.update!(provider: 'default')
+      end
+
+      it 'does not attempt to unsubscribe webhook' do
+        expect(Whatsapp::FacebookApiClient).not_to receive(:new)
+
+        service.perform
+      end
+    end
+
+    context 'when channel is whatsapp_cloud but not embedded_signup' do
+      before do
+        channel.update!(
+          provider: 'whatsapp_cloud',
+          provider_config: { 'source' => 'manual' }
+        )
+      end
+
+      it 'does not attempt to unsubscribe webhook' do
+        expect(Whatsapp::FacebookApiClient).not_to receive(:new)
+
+        service.perform
+      end
+    end
+
+    context 'when required config is missing' do
+      before do
+        channel.update!(
+          provider: 'whatsapp_cloud',
+          provider_config: { 'source' => 'embedded_signup' }
+        )
+      end
+
+      it 'does not attempt to unsubscribe webhook' do
+        expect(Whatsapp::FacebookApiClient).not_to receive(:new)
+
+        service.perform
+      end
+    end
+  end
+end