module Aequitas
  # Determines whether the specified +value+ is blank.
  #
  # An object is blank if it's false, empty, or a whitespace string.
  # For example, "", "   ", +nil+, [], and {} are blank.
  #
  # @api semipublic
  def self.blank?(value)
    case value
    when ::NilClass, ::FalseClass
      true
    when ::TrueClass, ::Numeric
      false
    when ::Array, ::Hash
      value.empty?
    when ::String
      value !~ /\S/
    else
      value.nil? || (value.respond_to?(:empty?) && value.empty?)
    end
  end
end