zammad/config/initializers/action_cable_preferences.rb

# Copyright (C) 2012-2022 Zammad Foundation, https://zammad-foundation.org/

if ENV['ENABLE_EXPERIMENTAL_MOBILE_FRONTEND'] == 'true'
  if ENV['REDIS_URL'].present?
    Rails.application.config.action_cable.cable = {
      'adapter'        => 'redis',
      'url'            => ENV['REDIS_URL'],
      'channel_prefix' => "zammad_#{Rails.env}"
    }
    Rails.logger.info 'Using the "Redis" adapter for ActionCable.'
  else
    if ActiveRecord::Base.connection_db_config.configuration_hash[:adapter] == 'mysql'
      raise 'Please provide a working redis instance via REDIS_URL - this is required on MySQL databases.'
    end

    # The 'postgresql' adapter does not work correctly in Capybara currently, so use
    #   'test' instead.
    if Rails.env.test?
      Rails.application.config.action_cable.cable = {
        'adapter' => 'test',
      }
      Rails.logger.info 'Using the "test" adapter for ActionCable.'
    else
      Rails.application.config.action_cable.cable = {
        'adapter' => 'postgresql',
      }
      Rails.logger.info 'Using the "PostgreSQL" adapter for ActionCable.'
    end
  end
end