feat (ee): APIs to configure an auto assignment limit for inboxes (#4672)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/helpers/api/v1/inboxes_helper.rb

@@ -74,4 +74,22 @@ module Api::V1::InboxesHelper
     context.verify_mode = openssl_verify_mode
     context
   end
+
+  def account_channels_method
+    {
+      'web_widget' => Current.account.web_widgets,
+      'api' => Current.account.api_channels,
+      'email' => Current.account.email_channels,
+      'line' => Current.account.line_channels,
+      'telegram' => Current.account.telegram_channels,
+      'whatsapp' => Current.account.whatsapp_channels,
+      'sms' => Current.account.sms_channels
+    }[permitted_params[:channel][:type]]
+  end
+
+  def validate_limit
+    return unless Current.account.inboxes.count >= Current.account.usage_limits[:inboxes]
+
+    render_payment_required('Account limit exceeded. Upgrade to a higher plan')
+  end
 end