Module: Aegis::HasRole

Defined in:
lib/aegis/has_role.rb

Instance Method Summary collapse

Instance Method Details

#has_role(options = {}) ⇒ Object 



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# File 'lib/aegis/has_role.rb', line 14

def has_role(options = {})

  # Legacy parameter names
  options[:accessor] ||= options.delete(:name_accessor)
  options[:reader] ||= options.delete(:name_reader)
  options[:writer] ||= options.delete(:name_writer)

  if options[:accessor]
    options[:reader] = "#{options[:accessor]}"
    options[:writer] = "#{options[:accessor]}="
    options.delete(:accessor)
  end

  self.class_eval do
  
    class_inheritable_accessor :aegis_role_name_reader, :aegis_role_name_writer, :aegis_default_role_name

    unless method_defined?(:after_initialize)
      def after_initialize
      end
    end

    if options[:default]
      self.aegis_default_role_name = options[:default].to_s
      after_initialize :set_default_aegis_role_name
    end
    
    self.aegis_role_name_reader = (options[:reader] || "role_name").to_sym
    self.aegis_role_name_writer = (options[:writer] || "role_name=").to_sym

    def aegis_role_name_reader
      self.class.class_eval{ aegis_role_name_reader }
    end

    def aegis_role_name_writer
      self.class.class_eval{ aegis_role_name_writer }
    end

    def aegis_role_name
      send(aegis_role_name_reader)
    end

    def aegis_role_name=(value)
      send(aegis_role_name_writer, value)
    end

    def role
      ::Permissions.find_role_by_name!(aegis_role_name)
    end
    
    def role=(role_or_name)
      self.aegis_role_name = if role_or_name.is_a?(Aegis::Role)
        role_or_name.name
      else
        role_or_name.to_s
      end
    end
    
    if options[:special_permissions]
      self.class_eval do 
        self.has_many :special_permissions, :foreign_key => "user_id"
      end
      @class_name = self.class_name.underscore
      SpecialPermission.class_eval "belongs_to :#{@class_name}, :foreign_key => 'user_id'"  
    end

    private
    
    # Delegate may_...? and may_...! methods to the user's role.
    def method_missing_with_aegis_permissions(symb, *args)
      method_name = symb.to_s
      if method_name =~ /^#{Aegis::Constants::PERMISSION_PREFIX}_(.+?)[\!\?]$/
        role.send(symb, self, *args)
      elsif method_name =~ /^(.*?)\?$/ && queried_role = ::Permissions.find_role_by_name($1)
        role == queried_role
      else
        method_missing_without_aegis_permissions(symb, *args)
      end
    end
    
    alias_method_chain :method_missing, :aegis_permissions
    
    def respond_to_with_aegis_permissions?(symb, include_private = false)
      if symb.to_s =~ /^#{Aegis::Constants::PERMISSION_PREFIX}_(.+?)[\!\?]$/
        true
      else
        respond_to_without_aegis_permissions?(symb, include_private)
      end
    end
    
    alias_method_chain :respond_to?, :aegis_permissions
    
    def set_default_aegis_role_name
      if new_record? && self.aegis_role_name.blank?
        self.aegis_role_name = self.class.aegis_default_role_name
      end
    end
    
  end

end

#validates_role_name(options = {}) ⇒ Object Also known as: validates_role 



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# File 'lib/aegis/has_role.rb', line 4

def validates_role_name(options = {})
  validates_each :role_name do |record, attr, value|
    options[:message] ||= I18n.translate('activerecord.errors.messages.inclusion')
    role = ::Permissions.find_role_by_name(value)
    record.errors.add attr, options[:message] if role.nil?
  end
end