Class: Transmogrifier::Rules::Copy

Inherits:
Object
  • Object
show all
Defined in:
lib/transmogrifier/rules/copy.rb

Instance Method Summary collapse

Constructor Details

#initialize(parent_selector, from, to) ⇒ Copy

Returns a new instance of Copy.



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# File 'lib/transmogrifier/rules/copy.rb', line 4

def initialize(parent_selector, from, to)
  @parent_selector, @from, @to = parent_selector, from, to
end

Instance Method Details

#apply!(input_hash) ⇒ Object 



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# File 'lib/transmogrifier/rules/copy.rb', line 8

def apply!(input_hash)
  top = Node.for(input_hash)
  *from_keys, from_key = Selector.from_string(@from).keys
  *to_keys, to_key = Selector.from_string(@to).keys

  parents = top.find_all(Selector.from_string(@parent_selector).keys)
  parents.each do |parent|
    to_parent = parent.find_all(to_keys).first
    object = parent.find_all(from_keys).first.clone(from_key)
    next if object.nil?

    if to_child = to_parent.find_all([to_key]).first
      to_child.append(object)
    else
      to_parent.append({to_key => object})
    end
  end

  top.raw
end