Module: GoodGuide::Gibbon::Util

Extended by:
Util
Included in:
Context, RuntimeClient, SemanticError, StaticClient, Util
Defined in:
lib/goodguide/gibbon.rb

Instance Method Summary collapse

Instance Method Details

#hash_to_ruby(js_hash) ⇒ Object 



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# File 'lib/goodguide/gibbon.rb', line 26

def hash_to_ruby(js_hash)
  return nil unless js_hash

  ruby_hash = { '__isHash__' => true }

  js_hash[:each].methodcall(js_hash, lambda { |*args|
    args.shift unless defined?(JRUBY_VERSION)
    k, v = args
    ruby_hash[k] = obj_to_ruby(v)
  })

  ruby_hash
end

#obj_to_js(o) ⇒ Object 



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# File 'lib/goodguide/gibbon.rb', line 40

def obj_to_js(o)
  case o
  when Array
    o.map { |x| obj_to_js(x) }
  when Hash
    if o['__isHash__']
      js_hash = gibbon[:Hash].new
      o.each do |k, v|
        next if k.to_s == '__isHash__'
        js_hash.set(k, obj_to_js(v))
      end
      js_hash
    elsif o['__isVariant__']
      type = o['_type']
      tag = o['_tag']
      constructor = gibbon[type]
      raise "unknown union #{type}" unless constructor && constructor.tags
      names = constructor.tags[tag]
      raise "unknown tag #{tag}" unless names.is_a?(JSArray) or names.is_a?(Array)

      vals = names.map do |name|
        raise "missing key #{name} in #{o}" unless o.key?(name)
        obj_to_js(o[name])
      end

      constructor[tag].methodcall(constructor, *vals)
    else
      o
    end
  else
    o
  end
end

#obj_to_ruby(o) ⇒ Object 



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# File 'lib/goodguide/gibbon.rb', line 74

def obj_to_ruby(o)
  case o
  when JSArray, Array
    o.map { |x| obj_to_ruby(x) }
  when JSString
    o.to_s
  when JSObject
    if o[:__isHash__]
      hash_to_ruby(o)
    elsif o[:__isVariant__]
      out = {
        '__isVariant__' => true,
        '_type' => o[:_type],
        '_tag' => o[:_tag]
      }

      o._names.each do |name|
        out[name] = obj_to_ruby o[name]
      end

      out
    else
      out = {}
      o.each do |k, v|
        out[k] = obj_to_ruby(v)
      end
      out
    end
  else
    o
  end
end