Class: RoadForest::Graph::NavAffordanceBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/roadforest/graph/nav-affordance-builder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(focus, path_provider) ⇒ NavAffordanceBuilder

Returns a new instance of NavAffordanceBuilder.



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# File 'lib/roadforest/graph/nav-affordance-builder.rb', line 6

def initialize(focus, path_provider)
  @focus, @path_provider = focus, path_provider
end

Instance Attribute Details

#focus ⇒ Object (readonly)

Returns the value of attribute focus.



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# File 'lib/roadforest/graph/nav-affordance-builder.rb', line 9

def focus
  @focus
end

#path_provider ⇒ Object (readonly)

Returns the value of attribute path_provider.



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# File 'lib/roadforest/graph/nav-affordance-builder.rb', line 9

def path_provider
  @path_provider
end

Instance Method Details

#iri_template(route, params) ⇒ Object 



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# File 'lib/roadforest/graph/nav-affordance-builder.rb', line 23

def iri_template(route, params)
  klass = route.interface_class
  return if klass.nil?

  variables = klass.path_params

  params ||= {}
  params = params.dup

  variables -= params.keys

  path_spec = route.resolve_path_spec(params)

  path = path_provider.services.canonical_host.to_s.sub(%r{/$}, '') +
    path_spec.map do |segment|
    case segment
    when Symbol
      variables.delete(segment)
      "{/#{segment}}"
    when '*'
      "{/extra*}"
    else
      "/" + segment.to_s
    end
    end.join("")

    unless params.empty?
      path += "?" + params.map do |key, value|
        [key, value].join("=")
      end.join("&")
    end

    unless variables.empty?
      path += "{?#{variables.join(",")}}"
    end
end

#to(name, params = nil) ⇒ Object 



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# File 'lib/roadforest/graph/nav-affordance-builder.rb', line 11

def to(name, params=nil)
  route = path_provider.route_for_name(name)

  pattern = iri_template(route, params)

  node = ::RDF::Node.new
  tmpl = ::RDF::Node.new
  focus << [ node, ::RDF.type, Af.Navigate ]
  focus << [ node, Af.target, tmpl ]
  focus << [ tmpl, Af.pattern, pattern ]
end