Contents

# frozen_string_literal: true

module ZuoraConnectUi
  # Take a resource and dump it to Google Style JSON, really fast
  class Serializer
    def initialize(resource, options = {})
      @resource = resource
      @kind = options[:kind]
      @fields = options[:fields]
      @is_collection = options[:is_collection]

      # TODO: if an attribute given is reserved, throw an error
    end

    def serialized_json
      require 'oj'
      # Enable to show Oj working in console
      # Oj.default_options = { trace: true }
      Oj.dump(serialized_hash, mode: :compat, time_format: :ruby)
    end

    def serialized_hash
      return hash_for_collection if collection?(@resource)

      hash_for_one
    end

    def hash_for_one
      hash = { data: nil }

      return hash unless @resource

      hash[:data] = record_hash(@resource)
      hash
    end

    def hash_for_collection
      hash = { data: {} }

      items = []

      @resource.each do |resource|
        items << record_hash(resource)
      end

      hash[:data][:items] = items
      hash
    end

    private

    def key_transform(input)
      input.to_s.camelize(:lower)
    end

    def collection?(resource)
      return @is_collection unless @is_collection.nil?

      resource.respond_to?(:size) && !resource.respond_to?(:each_pair)
    end

    def record_hash(resource)
      hash = { kind: key_transform(@kind), id: resource.id }
      @fields.each do |field|
        hash[key_transform(field)] = resource.public_send(field)
      end
      hash
    end

    # TODO: hold reserved words

    # see https://google.github.io/styleguide/jsoncstyleguide.xml

    TOP_LEVEL_RESERVED = %w[
      apiVersion context id method params data error
    ].freeze

    # Reserved fields in the Data object
    # kind    the resource's type
    # fields  comma separated list of attributes given
    # etag
    # items   if @resource is a collection, then items is the array of resources
    DATA_RESERVED = %w[
      kind fields etag items
    ].freeze
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
zuora_connect_ui-0.10.2	lib/zuora_connect_ui/serializer.rb
zuora_connect_ui-0.10.1	lib/zuora_connect_ui/serializer.rb
zuora_connect_ui-0.10.0	lib/zuora_connect_ui/serializer.rb