class Grape::Validations::Validators::Base

def self.inherited(klass)
  super
  Validations.register(klass)
end

def fail_fast?
  @fail_fast
end

def initialize(attrs, options, required, scope, opts)
  @attrs = Array(attrs)
  @option = options
  @required = required
  @scope = scope
  @fail_fast = opts[:fail_fast]
  @allow_blank = opts[:allow_blank]
end

def message(default_key = nil)
  options = instance_variable_get(:@option)
  options_key?(:message) ? options[:message] : default_key
end

def options_key?(key, options = nil)
  options = instance_variable_get(:@option) if options.nil?
  options.respond_to?(:key?) && options.key?(key) && !options[key].nil?
end

def validate(request)
  return unless @scope.should_validate?(request.params)
  validate!(request.params)
end

def validate!(params)
  attributes = SingleAttributeIterator.new(self, @scope, params)
  # we collect errors inside array because
  # there may be more than one error per field
  array_errors = []
  attributes.each do |val, attr_name, empty_val|
    next if !@scope.required? && empty_val
    next unless @scope.meets_dependency?(val, params)
    validate_param!(attr_name, val) if @required || (val.respond_to?(:key?) && val.key?(attr_name))
  rescue Grape::Exceptions::Validation => e
    array_errors << e
  end
  raise Grape::Exceptions::ValidationArrayErrors.new(array_errors) if array_errors.any?
end