# frozen_string_literal: true

#
# empty.rb
#
module Puppet::Parser::Functions
  newfunction(:empty, type: :rvalue, doc: <<-DOC
    @summary
      **Deprecated:** Returns true if the variable is empty.

    @return
      Returns `true` if the argument is an array or hash that contains no elements,
      or an empty string. Returns `false` when the argument is a numerical value.

    > *Note*: **Deprecated** from Puppet 5.5.0, the built-in
    [`empty`](https://puppet.com/docs/puppet/6.4/function.html#empty) function will be used instead.
  DOC
  ) do |arguments|
    raise(Puppet::ParseError, "empty(): Wrong number of arguments given (#{arguments.size} for 1)") if arguments.empty?
    value = arguments[0]

    unless value.is_a?(Array) || value.is_a?(Hash) || value.is_a?(String) || value.is_a?(Numeric)
      raise(Puppet::ParseError, 'empty(): Requires either array, hash, string or integer to work with')
    end

    return false if value.is_a?(Numeric)
    result = value.empty?
    return result
  end
end

# vim: set ts=2 sw=2 et :