chore: Enable an echo id for message create end points

app/builders/messages/message_builder.rb

@@ -3,12 +3,11 @@ class Messages::MessageBuilder
   attr_reader :message
 
   def initialize(user, conversation, params)
-    @content = params[:content]
+    @params = params
     @private = params[:private] || false
     @conversation = conversation
     @user = user
     @message_type = params[:message_type] || 'outgoing'
-    @content_type = params[:content_type]
     @items = params.to_unsafe_h&.dig(:content_attributes, :items)
     @attachments = params[:attachments]
     @in_reply_to = params.to_unsafe_h&.dig(:content_attributes, :in_reply_to)
@@ -48,12 +47,13 @@ class Messages::MessageBuilder
       account_id: @conversation.account_id,
       inbox_id: @conversation.inbox_id,
       message_type: message_type,
-      content: @content,
+      content: @params[:content],
       private: @private,
       sender: sender,
-      content_type: @content_type,
+      content_type: @params[:content_type],
       items: @items,
-      in_reply_to: @in_reply_to
+      in_reply_to: @in_reply_to,
+      echo_id: @params[:echo_id]
     }
   end
 end

app/controllers/api/v1/widget/messages_controller.rb

@@ -48,6 +48,7 @@ class Api::V1::Widget::MessagesController < Api::V1::Widget::BaseController
       sender: @contact,
       content: permitted_params[:message][:content],
       inbox_id: conversation.inbox_id,
+      echo_id: permitted_params[:message][:echo_id],
       message_type: :incoming
     }
   end
@@ -116,7 +117,7 @@ class Api::V1::Widget::MessagesController < Api::V1::Widget::BaseController
   end
 
   def permitted_params
-    params.permit(:id, :before, :website_token, contact: [:email], message: [:content, :referer_url, :timestamp])
+    params.permit(:id, :before, :website_token, contact: [:email], message: [:content, :referer_url, :timestamp, :echo_id])
   end
 
   def set_message

app/models/message.rb

@@ -36,6 +36,9 @@ class Message < ApplicationRecord
   validates :conversation_id, presence: true
   validates_with ContentAttributeValidator
 
+  # when you have a temperory id in your frontend and want it echoed back via action cable
+  attr_accessor :echo_id
+
   enum message_type: { incoming: 0, outgoing: 1, activity: 2, template: 3 }
   enum content_type: {
     text: 0,
@@ -89,7 +92,12 @@ class Message < ApplicationRecord
       message_type: message_type_before_type_cast,
       conversation_id: conversation.display_id
     )
+    data.merge!(echo_id: echo_id) if echo_id.present?
     data.merge!(attachments: attachments.map(&:push_event_data)) if attachments.present?
+    merge_sender_attributes(data)
+  end
+
+  def merge_sender_attributes(data)
     data.merge!(sender: sender.push_event_data) if sender && !sender.is_a?(AgentBot)
     data.merge!(sender: sender.push_event_data(inbox)) if sender&.is_a?(AgentBot)
     data