Class: Rad::Router::ObjectRouter

Inherits:
Object
  • Object
show all
Includes:
AbstractRouter
Defined in:
lib/rad/router/_object_router.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ObjectRouter

Returns a new instance of ObjectRouter.



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# File 'lib/rad/router/_object_router.rb', line 4

def initialize
  self.class_to_resource = -> klass      {raise ':class_to_resource not specified!'}
  self.resource_to_class = -> resource   {raise ':resource_to_class not specified!'}
  self.id_to_class       = -> id, params {raise ':id_to_class not specified!'}

  self.default_class_method = :all
  self.default_object_method    = :show

  @cached_class_to_resource, @cached_resource_to_class = {}, {}
end

Instance Method Details

#configure(options = {}) ⇒ Object 



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# File 'lib/rad/router/_object_router.rb', line 15

def configure options = {}
  raise "can't configure ObjectRouter twice!" if configured?
  self.configured = true

  # parsing options
  options.validate_options! :default_class_name, :class_to_resource, :resource_to_class, :id_to_class, :url_root, :prefix

  self.default_class_name     = options[:default_class_name] || raise(':default_class_name not provided!')

  self.class_to_resource = options[:class_to_resource] if options.include? :class_to_resource
  self.resource_to_class = options[:resource_to_class] if options.include? :resource_to_class
  self.id_to_class       = options[:id_to_class]       if options.include? :id_to_class

  self.url_root = parse_url_root options
  self.prefix   = parse_prefix options
end

#decode(path, params) ⇒ Object 



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# File 'lib/rad/router/_object_router.rb', line 70

def decode path, params
  return nil unless configured?

  parts = path[1..-1].split('/')

  # checking 'size' of path
  extra_size = (prefix ? prefix.size : 0) + (url_root ? 1 : 0)
  valid_range = (1 + extra_size)..(2 + extra_size)
  raise "invalid 'size' of path, must be in #{valid_range}!" unless valid_range.include? parts.size

  # url_root
  if url_root
    raise "invalid :url_root ('/#{parts.first}' should be equal to '#{url_root}')!" unless "/#{parts.first}" == url_root
    parts.shift
  end

  # prefix
  decode_prefix_params! parts, params, prefix if prefix

  # id, resource and method
  if parts.first =~ /^[A-Z]/
    resource, method = parts
    method ||= default_class_method
    method = method.to_sym

    raise "resource must be in plural form ('#{resource}')!" unless resource.pluralize == resource

    klass = cached_resource_to_class resource

    raise "no class for '#{resource}' resource!" unless klass
  else
    id, method = parts

    method ||= default_object_method
    method = method.to_sym

    # sometimes we need params inside of :id_to_class block,
    # for example to find out Space before finding Item
    klass = id_to_class.call id, params

    raise "no class for '#{id}' id!" unless klass

    params[:id] = id
  end

  klass.must_be.a Class
  return klass, method, params
end

#encode(klass, method, params) ⇒ Object 



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# File 'lib/rad/router/_object_router.rb', line 32

def encode klass, method, params
  return nil unless configured?

  id = params[:id]

  # id and resource
  path = if id
    raise ":id can be used with :default_class only (#{klass}, '#{id}')!" if klass != default_class

    params.delete :id
    raise ":id must not start from capital letter ('#{id}')!" if id =~ /^[A-Z]/

    path = if !method or method == default_object_method
      "/#{id}"
    else
      "/#{id}/#{method}"
    end
  else
    resource = cached_class_to_resource klass
    raise "no resource for #{klass}!" unless resource
    raise "resource must start from capital letter (class: #{klass}, resource: '#{resource}')!" unless resource =~ /^[A-Z]/

    path = if !method or method == default_class_method
      "/#{resource}"
    else
      "/#{resource}/#{method}"
    end
  end

  # prefix
  path = encode_prefix_params! path, params, prefix if prefix

  # url_root
  params[:url_root] = url_root if url_root

  [path, params]
end

#encode_method(route_method, has_id) ⇒ Object 



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# File 'lib/rad/router/_object_router.rb', line 119

def encode_method route_method, has_id
  return nil unless configured?

  token = route_method.sub(/_?path$/, '')

  if has_id
    method = token.empty? ? default_object_method : token
    method = method.to_sym

    return [default_class, method]
  else
    token = route_method.sub(/_path$/, '')
    parts = token.split '_'
    resource = parts.pop
    method = parts.empty? ? default_class_method : parts.join('_')

    # class
    resource = resource.pluralize.camelize
    klass = cached_resource_to_class resource
    raise "no class for '#{resource}' resource!" unless klass
    klass.must_be.a Class

    # method
    method = method.to_sym if method

    return [klass, method]
  end
end