feat: Ability to improve drafts in the editor using GPT integration (#6957)

ref: https://github.com/chatwoot/chatwoot/issues/6436
fixes: https://linear.app/chatwoot/issue/CW-1552/ability-to-rephrase-text-in-the-editor-using-gpt-integration

---------

Co-authored-by: Sojan <sojan@pepalo.com>
Co-authored-by: Nithin David Thomas <1277421+nithindavid@users.noreply.github.com>

spec/models/integrations/hook_spec.rb

@@ -27,4 +27,25 @@ RSpec.describe Integrations::Hook, type: :model do
       end
     end
   end
+
+  describe 'process_event' do
+    let(:account) { create(:account) }
+    let(:params) { { event: 'rephrase', payload: { test: 'test' } } }
+
+    it 'returns no processor found for hooks with out processor defined' do
+      hook = create(:integrations_hook, account: account)
+      expect(hook.process_event(params)).to eq('No processor found')
+    end
+
+    it 'returns results from procesor for openai hook' do
+      hook = create(:integrations_hook, :openai, account: account)
+
+      openai_double = double
+      allow(Integrations::Openai::ProcessorService).to receive(:new).and_return(openai_double)
+      allow(openai_double).to receive(:perform).and_return('test')
+      expect(hook.process_event(params)).to eq('test')
+      expect(Integrations::Openai::ProcessorService).to have_received(:new).with(event: params, hook: hook)
+      expect(openai_double).to have_received(:perform)
+    end
+  end
 end