module FastAttributes

# File lib/fast_attributes/default_attributes.rb, line 18
def add_default_attribute(klass, attribute, value)
  @default_attributes ||= {}
  @default_attributes[klass] ||= {}
  @default_attributes[klass][attribute] = value
end

# File lib/fast_attributes/default_attributes.rb, line 24
def cloneable?(value)
  case value
  when *SINGLETON_CLASSES
    false
  else
    true
  end
end

# File lib/fast_attributes/default_attributes.rb, line 5
def default_attributes(klass)
  return {} unless (@default_attributes || {})[klass]
  @default_attributes[klass].each_with_object({}) do |(attribute, value), memo|
    memo[attribute] = if value.respond_to?(:call)
                        value.call
                      elsif cloneable?(value)
                        value.clone
                      else
                        value
                      end
  end
end

# File lib/fast_attributes.rb, line 18
def get_type_casting(klass)
  type_casting[klass]
end

# File lib/fast_attributes.rb, line 31
def remove_type_casting(klass)
  type_casting.delete(klass)
end

# File lib/fast_attributes.rb, line 22
def set_type_casting(klass, casting)
  symbol = klass.name.gsub(/([a-z])([A-Z])/, '\1_\2').downcase.to_sym  # DateTime => :date_time
  type_cast symbol, klass do
    from 'nil',      to: 'nil'
    from klass.name, to: '%s'
    otherwise casting
  end
end

# File lib/fast_attributes.rb, line 39
def type_cast(*types_or_classes, &block)
  types_or_classes.each do |type_or_class|
    type_cast = TypeCast.new(type_or_class)
    type_cast.instance_eval(&block)
    type_casting[type_or_class] = type_cast
  end
end

# File lib/fast_attributes.rb, line 14
def type_casting
  @type_casting ||= {}
end

# File lib/fast_attributes.rb, line 35
def type_exists?(klass)
  type_casting.has_key?(klass)
end

# File lib/fast_attributes.rb, line 54
def attribute(*attributes, type)
  builder = Builder.new(self)
  builder.attribute *attributes, type
  builder.compile!
end

# File lib/fast_attributes.rb, line 48
def define_attributes(options = {}, &block)
  builder = Builder.new(self, options)
  builder.instance_eval(&block)
  builder.compile!
end