feat(channel): add support for Telegram Business bots (#10181) (#11663)

Added support for Telegram Business bots. Telegram webhooks from such bots include the business_message field, which we transform into a standard message for Chatwoot. This PR also modifies how we handle replies, attachments, and image uploads when working with Telegram Business bots.

demo: https://drive.google.com/file/d/1Yz82wXBVRtb-mxjXogkUju4hlJbt3qyh/view?usp=sharing&t=4

Fixes #10181

app/services/telegram/incoming_message_service.rb

@@ -8,17 +8,25 @@ class Telegram::IncomingMessageService
 
   def perform
     # chatwoot doesn't support group conversations at the moment
+    transform_business_message!
     return unless private_message?
 
     set_contact
     update_contact_avatar
     set_conversation
+    # TODO: Since the recent Telegram Business update, we need to explicitly mark messages as read using an additional request.
+    # Otherwise, the client will see their messages as unread.
+    # Chatwoot defines a 'read' status in its enum but does not currently update this status for Telegram conversations.
+    # We have two options:
+    # 1. Send the read request to Telegram here, immediately when the message is created.
+    # 2. Properly update the read status in the Chatwoot UI and trigger the Telegram request when the agent actually reads the message.
+    # See: https://core.telegram.org/bots/api#readbusinessmessage
     @message = @conversation.messages.build(
       content: telegram_params_message_content,
       account_id: @inbox.account_id,
       inbox_id: @inbox.id,
-      message_type: :incoming,
-      sender: @contact,
+      message_type: message_type,
+      sender: message_sender,
       content_attributes: telegram_params_content_attributes,
       source_id: telegram_params_message_id.to_s
     )
@@ -36,6 +44,11 @@ class Telegram::IncomingMessageService
       contact_attributes: contact_attributes
     ).perform
 
+    # TODO: Should we update contact_attributes when the user changes their first or last name?
+    # In business chats, when our Telegram bot initiates the conversation,
+    # the message does not include a language code.
+    # This is critical for AI assistants and translation plugins.
+
     @contact_inbox = contact_inbox
     @contact = contact_inbox.contact
   end
@@ -89,10 +102,19 @@ class Telegram::IncomingMessageService
 
   def conversation_additional_attributes
     {
-      chat_id: telegram_params_chat_id
+      chat_id: telegram_params_chat_id,
+      business_connection_id: telegram_params_business_connection_id
     }
   end
 
+  def message_type
+    business_message_outgoing? ? :outgoing : :incoming
+  end
+
+  def message_sender
+    business_message_outgoing? ? nil : @contact
+  end
+
   def file_content_type
     return :image if image_message?
     return :audio if audio_message?
@@ -191,4 +213,8 @@ class Telegram::IncomingMessageService
       params[:message][:video].presence ||
       params[:message][:video_note].presence
   end
+
+  def transform_business_message!
+    params[:message] = params[:business_message] if params[:business_message] && !params[:message]
+  end
 end

app/services/telegram/param_helpers.rb

@@ -13,6 +13,17 @@ module Telegram::ParamHelpers
     {}
   end
 
+  def business_message?
+    telegram_params_business_connection_id.present?
+  end
+
+  # In business bot mode we will receive messages from our telegram.
+  # This is our messages posted via telegram client.
+  # Such messages should be outgoing (from us to client)
+  def business_message_outgoing?
+    business_message? && telegram_params_base_object[:chat][:id] != telegram_params_base_object[:from][:id]
+  end
+
   def message_params?
     params[:message].present?
   end
@@ -29,24 +40,34 @@ module Telegram::ParamHelpers
     end
   end
 
+  def contact_params
+    if business_message_outgoing?
+      telegram_params_base_object[:chat]
+    else
+      telegram_params_base_object[:from]
+    end
+  end
+
   def telegram_params_from_id
+    return telegram_params_base_object[:chat][:id] if business_message?
+
     telegram_params_base_object[:from][:id]
   end
 
   def telegram_params_first_name
-    telegram_params_base_object[:from][:first_name]
+    contact_params[:first_name]
   end
 
   def telegram_params_last_name
-    telegram_params_base_object[:from][:last_name]
+    contact_params[:last_name]
   end
 
   def telegram_params_username
-    telegram_params_base_object[:from][:username]
+    contact_params[:username]
   end
 
   def telegram_params_language_code
-    telegram_params_base_object[:from][:language_code]
+    contact_params[:language_code]
   end
 
   def telegram_params_chat_id
@@ -57,6 +78,14 @@ module Telegram::ParamHelpers
     end
   end
 
+  def telegram_params_business_connection_id
+    if callback_query_params?
+      params[:callback_query][:message][:business_connection_id]
+    else
+      telegram_params_base_object[:business_connection_id]
+    end
+  end
+
   def telegram_params_message_content
     if callback_query_params?
       params[:callback_query][:data]

app/services/telegram/send_attachments_service.rb

@@ -71,6 +71,7 @@ class Telegram::SendAttachmentsService
     HTTParty.post("#{channel.telegram_api_url}/sendMediaGroup",
                   body: {
                     chat_id: chat_id,
+                    **business_connection_body,
                     media: attachments.map { |hash| hash.except(:attachment) }.to_json,
                     reply_to_message_id: reply_to_message_id
                   })
@@ -108,6 +109,7 @@ class Telegram::SendAttachmentsService
       HTTParty.post("#{channel.telegram_api_url}/sendDocument",
                     body: {
                       chat_id: chat_id,
+                      **business_connection_body,
                       document: file,
                       reply_to_message_id: reply_to_message_id
                     },
@@ -135,4 +137,14 @@ class Telegram::SendAttachmentsService
   def channel
     @channel ||= message.inbox.channel
   end
+
+  def business_connection_id
+    @business_connection_id ||= channel.business_connection_id(message)
+  end
+
+  def business_connection_body
+    body = {}
+    body[:business_connection_id] = business_connection_id if business_connection_id
+    body
+  end
 end

app/services/telegram/update_message_service.rb

@@ -5,6 +5,7 @@ class Telegram::UpdateMessageService
   pattr_initialize [:inbox!, :params!]
 
   def perform
+    transform_business_message!
     find_contact_inbox
     find_conversation
     find_message
@@ -36,4 +37,8 @@ class Telegram::UpdateMessageService
       @message.update!(content: edited_message[:caption])
     end
   end
+
+  def transform_business_message!
+    params[:edited_message] = params[:edited_business_message] if params[:edited_business_message].present?
+  end
 end