chore: Disable message hooks for conversations without incoming message (#7620)

When using client APIs to create conversations and auto-assignment is turned on, welcome messages were getting triggered. This PR disable the behaviour and ensure template hooks are triggered only if there are incoming messages present. 

Fixes: https://linear.app/chatwoot/issue/CW-2187

app/services/facebook/send_on_facebook_service.rb

@@ -60,11 +60,7 @@ class Facebook::SendOnFacebookService < Base::SendOnChannelService
 
   def sent_first_outgoing_message_after_24_hours?
     # we can send max 1 message after 24 hour window
-    conversation.messages.outgoing.where('id > ?', last_incoming_message.id).count == 1
-  end
-
-  def last_incoming_message
-    conversation.messages.incoming.last
+    conversation.messages.outgoing.where('id > ?', conversation.last_incoming_message.id).count == 1
   end
 
   def handle_facebook_error(exception)

app/services/instagram/send_on_instagram_service.rb

@@ -90,11 +90,7 @@ class Instagram::SendOnInstagramService < Base::SendOnChannelService
 
   def sent_first_outgoing_message_after_24_hours?
     # we can send max 1 message after 24 hour window
-    conversation.messages.outgoing.where('id > ?', last_incoming_message.id).count == 1
-  end
-
-  def last_incoming_message
-    conversation.messages.incoming.last
+    conversation.messages.outgoing.where('id > ?', conversation.last_incoming_message.id).count == 1
   end
 
   def config

app/services/message_templates/hook_execution_service.rb

@@ -3,6 +3,7 @@ class MessageTemplates::HookExecutionService
 
   def perform
     return if conversation.campaign.present?
+    return if conversation.last_incoming_message.blank?
 
     trigger_templates
   end

spec/services/message_templates/hook_execution_service_spec.rb

@@ -1,6 +1,27 @@
 require 'rails_helper'
 
 describe MessageTemplates::HookExecutionService do
+  context 'when there is no incoming message in conversation' do
+    it 'will not call any hooks' do
+      contact = create(:contact, email: nil)
+      conversation = create(:conversation, contact: contact)
+      # ensure greeting hook is enabled
+      conversation.inbox.update(greeting_enabled: true, enable_email_collect: true)
+
+      email_collect_service = double
+
+      allow(MessageTemplates::Template::EmailCollect).to receive(:new).and_return(email_collect_service)
+      allow(email_collect_service).to receive(:perform).and_return(true)
+      allow(MessageTemplates::Template::Greeting).to receive(:new)
+
+      # described class gets called in message after commit
+      create(:message, conversation: conversation, message_type: 'activity', content: 'Conversation marked resolved!!')
+
+      expect(MessageTemplates::Template::Greeting).not_to have_received(:new)
+      expect(MessageTemplates::Template::EmailCollect).not_to have_received(:new)
+    end
+  end
+
   context 'when Greeting Message' do
     it 'doesnot calls ::MessageTemplates::Template::Greeting if greeting_message is empty' do
       contact = create(:contact, email: nil)
@@ -22,7 +43,7 @@ describe MessageTemplates::HookExecutionService do
       expect(email_collect_service).to have_received(:perform)
     end
 
-    it 'will not call ::MessageTemplates::Template::CsatSurvey if its a tweet conversation' do
+    it 'will not call ::MessageTemplates::Template::Greeting if its a tweet conversation' do
       twitter_channel = create(:channel_twitter_profile)
       twitter_inbox = create(:inbox, channel: twitter_channel)
       # ensure greeting hook is enabled and greeting_message is present
@@ -97,6 +118,7 @@ describe MessageTemplates::HookExecutionService do
     before do
       allow(MessageTemplates::Template::CsatSurvey).to receive(:new).and_return(csat_survey)
       allow(csat_survey).to receive(:perform).and_return(true)
+      create(:message, conversation: conversation, message_type: 'incoming')
     end
 
     it 'calls ::MessageTemplates::Template::CsatSurvey when a conversation is resolved in an inbox with survey enabled' do