Class: Yaks::Reader::JsonAPI

Inherits:
Object
  • Object
show all
Defined in:
lib/yaks/reader/json_api.rb

Instance Method Summary collapse

Instance Method Details

#call(parsed_json, _env = {}) ⇒ Object 



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# File 'lib/yaks/reader/json_api.rb', line 4

def call(parsed_json, _env = {})
  included = parsed_json['included'].nil? ? {} : parsed_json['included'].dup

  if parsed_json['data'].is_a?(Array)
    CollectionResource.new(
      attributes: parsed_json['meta'].nil? ? nil : {meta: parsed_json['meta']},
      members: parsed_json['data'].map { |data| call('data' => data, 'included' => included) }
    )
  else
    attributes = parsed_json['data'].dup
    links = attributes.delete('links') || {}
    relationships = attributes.delete('relationships') || {}
    type = attributes.delete('type')
    attributes.merge!(attributes.delete('attributes') || {})

    embedded   = convert_embedded(Hash[relationships], included)
    links      = convert_links(Hash[links])

    Resource.new(
      type: Util.singularize(type),
      attributes: Util.symbolize_keys(attributes),
      subresources: embedded,
      links: links
    )
  end
end

#convert_embedded(relationships, included) ⇒ Object 



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# File 'lib/yaks/reader/json_api.rb', line 31

def convert_embedded(relationships, included)
  relationships.flat_map do |rel, relationship|
    # A Link doesn't have to contain a `data` member.
    # It can contain URLs instead, or as well, but we are only worried about *embedded* links here.
    data = relationship['data']
    # Resource data MUST be represented as one of the following:
    #
    # * `null` for empty to-one relationships.
    # * a "resource identifier object" for non-empty to-one relationships.
    # * an empty array ([]) for empty to-many relationships.
    # * an array of resource identifier objects for non-empty to-many relationships.
    if data.nil?
      NullResource.new(rels: [rel])
    elsif data.is_a? Array
      if data.empty?
        NullResource.new(collection: true, rels: [rel])
      else
        CollectionResource.new(
          members: data.map { |link|
            data = included.find{ |item| (item['id'] == link['id']) && (item['type'] == link['type']) }
            call('data' => data, 'included' => included)
          },
          rels: [rel]
        )
      end
    else
      data = included.find{ |item| (item['id'] == data['id']) && (item['type'] == data['type']) }
      call('data' => data, 'included' => included).with(rels: [rel])
    end
  end.compact
end

#convert_links(links) ⇒ Object 



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# File 'lib/yaks/reader/json_api.rb', line 63

def convert_links(links)
  links.map do |rel, link|
    Resource::Link.new(rel: rel.to_sym, uri: link)
  end
end