Class: Api::Presenter::Hypermedia

Inherits:
Object
  • Object
show all
Defined in:
lib/api/presenter/hypermedia.rb

Class Method Summary collapse

Class Method Details


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# File 'lib/api/presenter/hypermedia.rb', line 47

def build_links(resource, options = {})
  { "links" => resource.links(options) }
end

.present(resource) ⇒ Object 


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# File 'lib/api/presenter/hypermedia.rb', line 5

def present(resource)
  # Initialize representation with links
  representation = build_links resource

  present_properties resource, representation

  representation
end

.present_properties(resource, representation) ⇒ Object

Process basic information from the resource such as simlple fields(Dates, numbers, etc.) and also more complex ones that may be subject of expansion.


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# File 'lib/api/presenter/hypermedia.rb', line 17

def present_properties(resource, representation)
  resource_properties = resource.class.properties.dup
  
  # Special treatment for entries
  entries_property = resource_properties.delete(:entries)

  if entries_property
    representation[entries_property.to_s] = []
    resource.send(entries_property).each do |nested_resource|
      representation[entries_property.to_s] << build_links(nested_resource.to_resource, embed: true)
    end
  end
  
  # Now the other muggles   
  resource_properties.each do |property_name|
    property_value = resource.send(property_name)
    
    if property_value.kind_of?(Resource) || property_value.respond_to?(:to_resource)
      # Resource like properties
      property_value = property_value.to_resource if property_value.respond_to? :to_resource
      representation["links"][property_name.to_s] = property_value.links(embed: resource.kind_of?(CollectionResource))
      # we only need the "self" contents
      representation["links"][property_name.to_s] = representation["links"][property_name.to_s]["self"] if representation["links"][property_name.to_s]["self"]              
    else
      # Non-Resource like properties
      representation[property_name.to_s] = property_value
    end
  end
end