Class: Separatum::Processors::FieldChanger

Inherits:
Object
  • Object
show all
Defined in:
lib/separatum/processors/field_changer.rb

Constant Summary collapse

CLASS_METHOD =

Allows:

SomeClass#method
SomeNamespace::SomeClass#method
SuperNamespace::SomeNamespace::SomeClass#method

/^([A-Za-z_][0-9A-Za-z_]*(?:::[A-Za-z_][0-9A-Za-z_]*)*)#([A-Za-z_][0-9A-Za-z_]*)$/

Instance Method Summary collapse

Constructor Details

#initialize(*options, &block) ⇒ FieldChanger

Returns a new instance of FieldChanger.



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# File 'lib/separatum/processors/field_changer.rb', line 10

def initialize(*options, &block)
  parse_options(*options, &block)
end

Instance Method Details

#call(*hashes) ⇒ Object 



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# File 'lib/separatum/processors/field_changer.rb', line 14

def call(*hashes)
  hashes.flatten.map do |hash|
    new_hash = hash.symbolize_keys
    if hash[:_klass] == @klass && hash.key?(@method)
      new_hash[@method] = @transformer.call(hash[@method])
    end
    new_hash
  end
end

#parse_options(*options) ⇒ Object 



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# File 'lib/separatum/processors/field_changer.rb', line 24

def parse_options(*options)
  p1 = options.shift
  if p1.is_a?(String) && (res = p1.match(CLASS_METHOD))
    @klass = res[1]
    @method = res[2].to_sym
  elsif p1.is_a?(Class)
    @klass = p1.to_s
    p2 = options.shift
    if p2.is_a?(Symbol)
      @method = p2
    else
      fail
    end
  else
    fail
  end

  if block_given?
    @transformer = Proc.new
    pp @transformer
  else
    p3 = options.shift
    if p3.is_a?(Proc)
      @transformer = p3
    elsif p3.is_a?(String) && (res = p3.match(CLASS_METHOD))
      @transformer = Proc.new { |value| Object.const_get(res[1]).new.send(res[2].to_sym, value) }
    elsif p3.is_a?(Class)
      p4 = options.shift
      if p4.is_a?(Symbol)
        @transformer = Proc.new { |value| p3.new.send(p4, value) }
      else
        fail
      end
    else
      fail
    end
  end
end