module Transmutable

# File lib/transmutable.rb, line 11
def self.add_default_transmuter_to(base)
  base.class_eval do
    transmuter Base
  end
end

# File lib/transmutable.rb, line 5
def self.included(base)
  base.extend(TransmutableClassMethods)

  add_default_transmuter_to(base)
end

# File lib/transmutable.rb, line 17
def serialize
  transmuter.new(self).transmute
end

# File lib/transmutable.rb, line 50
def serialize_val(key, return_hash, value)
  return return_hash[key] = {} if value.nil?

  if value.respond_to?(:each) && !value.is_a?(Hash)
    return_hash[key] = value.collect do |val|
      if val.respond_to? :serialize
        return_hash[key] = val.serialize
      else
        {}
      end
    end
  else
    return_hash[key] = value.serialize
  end
end

# File lib/transmutable.rb, line 21
def serialize_with(*relations)
  return_hash = serialize

  relations.each do |relation|
    case relation
      when String, Symbol
        serialize_val(relation, return_hash, send(relation))
      when Hash
        relation.each do |key, values|
          relation_val = send(key)

          if relation_val.respond_to?(:each) && !relation_val.is_a?(Hash)
            relation_val.each do |rel_val|
              if return_hash[key].present?
                return_hash[key] << rel_val.serialize_with(*values)
              else
                return_hash[key] = [rel_val.serialize_with(*values)]
              end
            end
          else
            return_hash[key] = relation_val.serialize_with(*values)
          end
        end
    end
  end

  return_hash
end