Feat: detect language of the message content (#6660)

lib/integrations/google_translate/detect_language_service.rb

@@ -0,0 +1,40 @@
+class Integrations::GoogleTranslate::DetectLanguageService
+  pattr_initialize [:hook!, :message!]
+
+  def perform
+    return unless valid_message?
+    return if conversation.additional_attributes['conversation_language'].present?
+
+    text = message.content[0...1500]
+    response = client.detect_language(
+      content: text,
+      parent: "projects/#{hook.settings['project_id']}"
+    )
+
+    update_conversation(response)
+  end
+
+  private
+
+  def valid_message?
+    message.incoming? && message.content.present?
+  end
+
+  def conversation
+    @conversation ||= message.conversation
+  end
+
+  def update_conversation(response)
+    return if response&.languages.blank?
+
+    conversation_language = response.languages.first.language_code
+    additional_attributes = conversation.additional_attributes.merge({ conversation_language: conversation_language })
+    conversation.update!(additional_attributes: additional_attributes)
+  end
+
+  def client
+    @client ||= Google::Cloud::Translate.translation_service do |config|
+      config.credentials = hook.settings['credentials']
+    end
+  end
+end