Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/builders/notification_builder.rb

@@ -0,0 +1,39 @@
+class NotificationBuilder
+  pattr_initialize [:notification_type!, :user!, :account!, :primary_actor!, :secondary_actor]
+
+  def perform
+    build_notification
+  end
+
+  private
+
+  def current_user
+    Current.user
+  end
+
+  def user_subscribed_to_notification?
+    notification_setting = user.notification_settings.find_by(account_id: account.id)
+    # added for the case where an assignee might be removed from the account but remains in conversation
+    return false if notification_setting.blank?
+
+    return true if notification_setting.public_send("email_#{notification_type}?")
+    return true if notification_setting.public_send("push_#{notification_type}?")
+
+    false
+  end
+
+  def build_notification
+    # Create conversation_creation notification only if user is subscribed to it
+    return if notification_type == 'conversation_creation' && !user_subscribed_to_notification?
+    # skip notifications for blocked conversations except for user mentions
+    return if primary_actor.contact.blocked? && notification_type != 'conversation_mention'
+
+    user.notifications.create!(
+      notification_type: notification_type,
+      account: account,
+      primary_actor: primary_actor,
+      # secondary_actor is secondary_actor if present, else current_user
+      secondary_actor: secondary_actor || current_user
+    )
+  end
+end