Module: SmsOnRails::ServiceProviders::HasASmsServiceProvider::ClassMethods

Defined in:
lib/sms_on_rails/activerecord_extensions/has_a_sms_service_provider.rb

Instance Method Summary collapse

Instance Method Details

#has_a_sms_service_provider(options = {}) ⇒ Object

Add an accessor to the service provider

For example, if the provider was referenced by name by calling method ‘sms_vendor’

has_an_sms_service_provider :method => 'sms_vendor', :type => :name, :accessor_method => 'sms_service_provider'

would define an instance method sms_service_provider and sms_service_provider_id that returns the appropriate instance and id respectively.

Likewise if :type => :id or there is a column on the :id field, sms_service_provider_id would be defined

Options

:type the key field (either :id or :name). the one that actually stores the data The provider is referenced by provider_id by default :method the name of the method that should be invoked to get the wanted id or name :accessor_name the name of the new method accessor



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# File 'lib/sms_on_rails/activerecord_extensions/has_a_sms_service_provider.rb', line 28

def has_a_sms_service_provider(options={})
  self.sms_service_provider_options = options||{}

  sms_service_provider_options[:accessor_name]||= 'sms_service_provider'

  accessors =
    { sms_service_provider_options[:accessor_name] + '_id' => :provider_id,
      sms_service_provider_options[:accessor_name] + '_name'=> :name}


  key_field = nil
  if sms_service_provider_options[:type]
    key_field = sms_service_provider_options[:accessor_name]
    key_field << '_'
    key_field << sms_service_provider_options[:type]
  end

  set_instance_code = accessors.inject('') do |code, field|


    # column fields use write_attribute to update the data
    # non column field look up the service providers real name
    if respond_to?(:column_names) && self.column_names.include?(field.first)
      key_field ||= field.first
      code << "write_attribute(#{field.first.inspect}, (@provider.#{field.last} if @provider))"
    else
      class_eval <<-EOS, __FILE__, __LINE__
        def #{field.first}
          if (p=#{sms_service_provider_options[:accessor_name]})
            p.send #{field.last.inspect}
          end
        end
      EOS
    end

    #define the setter function to call the service_provider instance setter
    class_eval <<-EOS, __FILE__, __LINE__
      def #{field.first}=(value)
        self.#{sms_service_provider_options[:accessor_name]}=value
        self.#{field.first}
      end
    EOS
    code
  end

  #define the setter and getter codes for service provider
  class_eval <<-EOS, __FILE__, __LINE__
    def #{sms_service_provider_options[:accessor_name]}
      unless @provider
        value = self.send(#{key_field.inspect})
        self.#{sms_service_provider_options[:accessor_name]}=value
      end
      @provider
    end

    def #{sms_service_provider_options[:accessor_name]}=(value)
      @provider = SmsOnRails::ServiceProviders::Base.get_service_provider(value)
      #{set_instance_code}
      @provider
    end

    def default_service_provider; SmsOnRails::ServiceProviders::Base.default_service_provider; end
    def self.sms_service_provider_map; SmsOnRails::ServiceProviders::Base.provider_map; end
    def self.sms_service_provider_list; SmsOnRails::ServiceProviders::Base.provider_list; end
  EOS
end