chore: pass to agent if there is error parsing json (#7990)

- GPT bot should pass the conversation to the agent if AI returns invalid json or any other error

spec/enterprise/services/enterprise/message_templates/response_bot_service_spec.rb

@@ -0,0 +1,59 @@
+require 'rails_helper'
+
+RSpec.describe Enterprise::MessageTemplates::ResponseBotService, type: :service do
+  let!(:conversation) { create(:conversation, status: :pending) }
+  let(:service) { described_class.new(conversation: conversation) }
+  let(:chat_gpt_double) { instance_double(ChatGpt) }
+  let(:response_object) { instance_double(Response, id: 1, question: 'Q1', answer: 'A1') }
+
+  before do
+    # Uncomment if you want to run the spec in your local machine
+    # Features::ResponseBotService.new.enable_in_installation
+    skip('Skipping since vector is not enabled in this environment') unless Features::ResponseBotService.new.vector_extension_enabled?
+
+    create(:message, message_type: :incoming, conversation: conversation, content: 'Hi')
+    allow(ChatGpt).to receive(:new).and_return(chat_gpt_double)
+    allow(chat_gpt_double).to receive(:generate_response).and_return({ 'response' => 'some_response', :context_ids => [1, 2] })
+    allow(conversation.inbox).to receive(:get_responses).and_return([response_object])
+  end
+
+  describe '#perform' do
+    context 'when successful' do
+      it 'creates an outgoing message' do
+        expect do
+          service.perform
+        end.to change { conversation.messages.where(message_type: :outgoing).count }.by(1)
+
+        expect(conversation.messages.last.content).to eq('some_response')
+      end
+    end
+
+    context 'when JSON::ParserError is raised' do
+      it 'creates a handoff message' do
+        allow(chat_gpt_double).to receive(:generate_response).and_raise(JSON::ParserError)
+
+        expect do
+          service.perform
+        end.to change { conversation.messages.where(message_type: :outgoing).count }.by(1)
+
+        expect(conversation.messages.last.content).to eq('passing to an agent')
+        expect(conversation.status).to eq('open')
+      end
+    end
+
+    context 'when StandardError is raised' do
+      it 'captures the exception' do
+        allow(chat_gpt_double).to receive(:generate_response).and_raise(StandardError)
+
+        expect(ChatwootExceptionTracker).to receive(:new).and_call_original
+
+        expect do
+          service.perform
+        end.to change { conversation.messages.where(message_type: :outgoing).count }.by(1)
+
+        expect(conversation.messages.last.content).to eq('passing to an agent')
+        expect(conversation.status).to eq('open')
+      end
+    end
+  end
+end