feat: add Whatsapp embedded signup API

app/controllers/dashboard_controller.rb

@@ -67,6 +67,8 @@ class DashboardController < ActionController::Base
       FB_APP_ID: GlobalConfigService.load('FB_APP_ID', ''),
       INSTAGRAM_APP_ID: GlobalConfigService.load('INSTAGRAM_APP_ID', ''),
       FACEBOOK_API_VERSION: GlobalConfigService.load('FACEBOOK_API_VERSION', 'v17.0'),
+      WHATSAPP_APP_ID: GlobalConfigService.load('WHATSAPP_APP_ID', ''),
+      WHATSAPP_CONFIGURATION_ID: GlobalConfigService.load('WHATSAPP_CONFIGURATION_ID', ''),
       IS_ENTERPRISE: ChatwootApp.enterprise?,
       AZURE_APP_ID: GlobalConfigService.load('AZURE_APP_ID', ''),
       GIT_SHA: GIT_HASH

app/controllers/whatsapp/embedded_controller.rb

@@ -0,0 +1,79 @@
+class Whatsapp::EmbeddedController < ApplicationController
+  include EnsureCurrentAccountHelper
+
+  before_action :authenticate_user!
+  before_action :current_account
+  before_action :check_authorization
+
+  def new
+    # Configuration endpoint for embedded signup initialization
+    render json: {
+      status: 'ready',
+      app_id: GlobalConfigService.load('WHATSAPP_APP_ID', ''),
+      config_id: GlobalConfigService.load('WHATSAPP_CONFIGURATION_ID', ''),
+      partner_id: GlobalConfigService.load('WHATSAPP_PARTNER_ID', ''),
+      graph_api_version: GlobalConfigService.load('WHATSAPP_GRAPH_API_VERSION', 'v21.0')
+    }
+  end
+
+  def embedded_signup
+    # Complete embedded signup using auth code + business info from frontend
+    validate_authorization_code!
+    return if performed?
+
+    validate_required_parameters!
+    return if performed?
+
+    channel = process_signup
+    @inbox = channel.inbox
+
+    # Return the inbox object using the standard jbuilder template
+    render 'embedded_signup', formats: [:json]
+  rescue StandardError => e
+    handle_signup_error(e)
+  end
+
+  private
+
+  def validate_authorization_code!
+    return if params[:code].present?
+
+    render json: {
+      error: 'Missing authorization code',
+      message: 'Authorization code is required for embedded signup'
+    }, status: :bad_request
+  end
+
+  def validate_required_parameters!
+    return if params[:business_id].present? && params[:waba_id].present?
+
+    render json: {
+      error: 'Missing required parameters: business_id and waba_id are required'
+    }, status: :bad_request
+  end
+
+  def process_signup
+    service = Whatsapp::EmbeddedSignupService.new(
+      account: Current.account,
+      code: params[:code],
+      business_id: params[:business_id],
+      waba_id: params[:waba_id],
+      phone_number_id: params[:phone_number_id]
+    )
+
+    service.perform
+  end
+
+  def handle_signup_error(error)
+    Rails.logger.error("WhatsApp embedded signup processing error: #{error.message}")
+    Rails.logger.error(error.backtrace.join("\n"))
+    render json: {
+      error: 'Internal server error',
+      message: error.message
+    }, status: :internal_server_error
+  end
+
+  def check_authorization
+    authorize(Current.account, :update?)
+  end
+end