Module: ModelPack::Serialization

Defined in:
lib/model_pack/serialization.rb

Instance Method Summary collapse

Instance Method Details

#copy ⇒ Object 



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# File 'lib/model_pack/serialization.rb', line 62

def copy
  self.class.new(self.serializable_hash)
end

#serializable_attribute_names(attributes, options) ⇒ Object 



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# File 'lib/model_pack/serialization.rb', line 4

def serializable_attribute_names(attributes, options)
  names = attributes.keys.sort
  case options
    when Hash
      names &= Array.wrap(options.keys).map(&:to_s)
    when true
      # do nothing
    when false
      names = {}
    when nil
      names = {}
  else
    names &= Array.wrap(options).map(&:to_s)
  end

  names
end

#serializable_hash(options = nil, global = nil) ⇒ Object 



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# File 'lib/model_pack/serialization.rb', line 22

def serializable_hash(options = nil, global = nil)
  serializable_value =
    ->(value, *a) { value.respond_to?(:serializable_hash) ? value.serializable_hash(*a[0...value.method(:serializable_hash).arity]) : value }
  enumerable_value = ->(value, *a) {
    value.is_a?(Hash) ? value.inject({}) { |h, e| h[e.first] = serializable_value[e.last, *a]; h } :
    (value.is_a?(Enumerable) ? value.map{ |v| serializable_value[v, *a] } : serializable_value[value, *a])
  }

  hash = {}
  options = Hash[*options.map{|v| [v, true]}.flatten(2)] if options.is_a?(Array)
  self.class.attribute_names.each do |n|
    opts = options ? options[n] : nil
    empty = options.nil? || options.empty?
    n_hash = "#{n}_hash"
    if (opts || empty) && respond_to?(n_hash)
      value = send(n_hash, *(method(n_hash).arity.zero? ? [] : [opts, global]))
      hash[n] = value if value
      next
    end

    value =  send(n)
    data = case opts
    when Symbol
      value.send(opts)
    when true
      enumerable_value[value, nil, global]
    when false
      nil
    when nil
      # auto detect value type if options nil too
      empty ? enumerable_value[value, nil, global] : nil
    when Hash
      enumerable_value[value, opts, global]
    end

    hash[n] = data unless data.nil?
  end
  hash
end