Class: Delorean::BaseModule::BaseClass

Inherits:
Object
  • Object
show all
Defined in:
lib/delorean/base.rb

Class Method Summary collapse

Class Method Details

._err(*args) ⇒ Object 



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# File 'lib/delorean/base.rb', line 133

def self._err(*args)
  str = args.map(&:to_s).join(", ")
  raise str
end

._get_attr(obj, attr, _e) ⇒ Object 



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# File 'lib/delorean/base.rb', line 63

def self._get_attr(obj, attr, _e)
  # REALLY FIXME: this really needs to be another "when" in the
  # case statement below. However, Gemini appears to create Hash
  # objects when running Delorean modules in delayed jobs that
  # return true when we called obj.instance_of?(Hash) and do not
  # work with the "case/when" matcher!!!  For now, this is a
  # hacky workaround.  This is likely some sort of Ruby bug.
  if obj.instance_of?(Hash)
    # FIXME: this implementation doesn't handle something like
    # {}.length.  i.e. length is a whitelisted function, but not
    # an attr. This implementation returns nil instead of 0.
    return obj[attr] if obj.member?(attr)
    return attr.is_a?(String) ? obj[attr.to_sym] : nil
  end

  # NOTE: should keep this function consistent with _index
  case obj
  when nil
    # FIXME: even Javascript which is superpermissive raises an
    # exception on null getattr.
    return nil
  when NodeCall
    return obj.evaluate(attr)
  when OpenStruct
    return obj[attr.to_sym]
  when Class
    return obj.send((attr + POST).to_sym, _e) if obj < BaseClass
  end

  begin
    return _instance_call(obj, attr, [], _e)
  rescue => exc
    raise InvalidGetAttribute,
    "attr lookup failed: '#{attr}' on <#{obj.class}> #{obj} - #{exc}"
  end
end

._index(obj, args, _e) ⇒ Object 



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# File 'lib/delorean/base.rb', line 102

def self._index(obj, args, _e)
  # NOTE: should keep this function consistent with _get_attr
  case obj
  when nil
    # FIXME: even Javascript which is superpermissive raises an
    # exception on null getattr.
    return nil
  when Hash, NodeCall, Class, OpenStruct
    raise InvalidIndex unless args.length == 1
    _get_attr(obj, args[0], _e)
  when Array, String, MatchData
    raise InvalidIndex unless args.length <= 2 &&
                              args[0].is_a?(Integer) &&
                              (args[1].nil? || args[1].is_a?(Integer))
    obj[*args]
  else
    raise InvalidIndex
  end
end

._instance_call(obj, method, args, _e) ⇒ Object 



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# File 'lib/delorean/base.rb', line 153

def self._instance_call(obj, method, args, _e)
  begin
    msg = method.to_sym
  rescue NoMethodError
    raise "bad method #{method}"
  end

  # FIXME: this is pretty hacky -- should probably merge
  # whitelist and SIG mechanisms.
  if obj.is_a?(Class)
    _e[:_engine].parse_check_call_fn(method, args.count, obj)
    return obj.send(msg, *args)
  end

  cls = obj.class

  matcher = ::Delorean::Ruby.whitelist.matcher(method_name: msg)

  raise "no such method #{method}" unless matcher

  return(
    _instance_call(obj, matcher.match_to, args, _e)
  ) if matcher.match_to?

  matcher.match!(klass: obj.class, args: args)

  obj.send(msg, *args)
end

._node_call(node, _e, params) ⇒ Object 



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# File 'lib/delorean/base.rb', line 138

def self._node_call(node, _e, params)
  context = _e[:_engine]

  # a node call is being called with amended args
  return node + params if node.is_a?(NodeCall)

  engine = node.is_a?(Class) &&
    context.module_name != node.module_name ?
  context.get_import_engine(node.module_name) : context

  NodeCall.new(_e, engine, node || self, params)
end

._sanitize_hash(_e) ⇒ Object 



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# File 'lib/delorean/base.rb', line 124

def self._sanitize_hash(_e)
  _e.each_with_object({}) do
    |(k,v), h|
    h[k] = v if k.is_a?(Integer) || k =~ /\A[a-z][A-Za-z0-9_]*\z/
  end
end