Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/services/tiktok/send_on_tiktok_service.rb

@@ -0,0 +1,47 @@
+class Tiktok::SendOnTiktokService < Base::SendOnChannelService
+  private
+
+  def channel_class
+    Channel::Tiktok
+  end
+
+  def perform_reply
+    validate_message_support!
+    message_id = send_message
+
+    message.update!(source_id: message_id)
+    Messages::StatusUpdateService.new(message, 'delivered').perform
+  rescue StandardError => e
+    Rails.logger.error "Failed to send Tiktok message: #{e.message}"
+    Messages::StatusUpdateService.new(message, 'failed', e.message).perform
+  end
+
+  def validate_message_support!
+    return unless message.attachments.any?
+    raise 'Sending attachments with text is not supported on TikTok.' if message.outgoing_content.present?
+    raise 'Sending multiple attachments in a single TikTok message is not supported.' unless message.attachments.one?
+  end
+
+  def send_message
+    tt_conversation_id = message.conversation[:additional_attributes]['conversation_id']
+    tt_referenced_message_id = message.content_attributes['in_reply_to_external_id']
+
+    if message.attachments.any?
+      tiktok_client.send_media_message(tt_conversation_id, message.attachments.first, referenced_message_id: tt_referenced_message_id)
+    else
+      tiktok_client.send_text_message(tt_conversation_id, message.outgoing_content, referenced_message_id: tt_referenced_message_id)
+    end
+  end
+
+  def tiktok_client
+    @tiktok_client ||= Tiktok::Client.new(business_id: channel.business_id, access_token: channel.validated_access_token)
+  end
+
+  def inbox
+    @inbox ||= message.inbox
+  end
+
+  def channel
+    @channel ||= inbox.channel
+  end
+end