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# frozen_string_literal: true
module Grape
module Validations
class DefaultValidator < Base
def initialize(attrs, options, required, scope, opts = {})
@default = options
super
end
def validate_param!(attr_name, params)
params[attr_name] = if @default.is_a? Proc
@default.call
elsif @default.frozen? || !duplicatable?(@default)
@default
else
duplicate(@default)
end
end
def validate!(params)
attrs = SingleAttributeIterator.new(self, @scope, params)
attrs.each do |resource_params, attr_name|
if resource_params.is_a?(Hash) && resource_params[attr_name].nil?
validate_param!(attr_name, resource_params)
end
end
end
private
# return true if we might be able to dup this object
def duplicatable?(obj)
!obj.nil? &&
obj != true &&
obj != false &&
!obj.is_a?(Symbol) &&
!obj.is_a?(Numeric)
end
# make a best effort to dup the object
def duplicate(obj)
obj.dup
rescue TypeError
obj
end
end
end
end
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