Module: Primalize::JSONAPI

Defined in:
lib/primalize/jsonapi.rb,
lib/primalize/jsonapi/version.rb

Defined Under Namespace

Classes: Cache, HasMany, HasOne, MetadataPrimalizer, Relationships

Constant Summary collapse

VERSION = 
"0.1.2"

Class Method Summary collapse

Class Method Details

.[](*args) ⇒ Object 



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# File 'lib/primalize/jsonapi.rb', line 122

def self.[] *args
  Class.new(Single) do
    def self.model_primalizer
      @model_primalizer ||= Class.new(Single) do
        def self.attributes **attrs
          attribute_primalizer.attributes attrs
        end

        def self.attribute_primalizer
          @attribute_primalizer ||= Class.new(Single) do
          end
        end

        def self.relationships
          @relationships ||= Relationships.new
        end

        def self.has_many *args, &block
          relationships << HasMany.new(*args, &block)
        end

        def self.has_one *args, &block
          relationships << HasOne.new(*args, &block)
        end

        _attributes(
          id: string(&:to_s),
          type: string,
          attributes: object,
          relationships: object,
        )

        attr_reader :cache

        def initialize model, cache: Cache.new
          super(model)
          @cache = cache
        end

        def self.name
          'ModelPrimalizer'
        end

        def type
          object.class.name.gsub(/(.)([A-Z])/, '\1_\2').downcase
        end

        def attributes
          self.class.attribute_primalizer.new(object).call
        end

        def relationships
          self.class.relationships.metadata object, cache: cache
        end
      end
    end

    def self.attributes **attrs
      model_primalizer.attributes attrs
    end

    _attributes data: array(primalize(model_primalizer))

    def self.has_many *args, &block
      model_primalizer.has_many *args, &block
    end

    def self.has_one *args, &block
      model_primalizer.has_one *args, &block
    end

    attr_reader :cache

    def initialize models, include: [], meta: nil, cache: Cache.new
      super Array(models)

      @include = include
      @meta = meta
      @cache = cache
    end

    def call
      super.tap do |value|
        if @meta
          value[:meta] = @meta
        end

        unless @include.to_a.empty?
          included = Set.new

          @include.each do |rel|
            object.each do |model|
              primalizer = self.class.model_primalizer.relationships[rel]
              relationship = primalizer.call(model, cache: cache)

              case relationship
              when Array
                relationship.each do |object|
                  object[:data].each do |data|
                    data.delete :relationships
                    included << data
                  end
                end
              when Hash
                data = relationship[:data].first
                data.delete :relationships
                included << data
              end
            end
          end

          value[:included] = included.to_a
        end
      end
    end

    def data
      object.map do |model|
        self.class.model_primalizer.new(model, cache: cache).call
      end
    end
  end
end