capitalize.rb

# frozen_string_literal: true

#
#  capitalize.rb
#  Please note: This function is an implementation of a Ruby class and as such may not be entirely UTF8 compatible. To ensure compatibility please use this function with Ruby 2.4.0 or greater - https://bugs.ruby-lang.org/issues/10085.
#
module Puppet::Parser::Functions
  newfunction(:capitalize, type: :rvalue, doc: <<-DOC
    @summary
      **Deprecated** Capitalizes the first letter of a string or array of strings.

    Requires either a single string or an array as an input.

    > *Note:*
      **Deprecated** from Puppet 6.0.0, yhis function has been replaced with a
      built-in [`capitalize`](https://puppet.com/docs/puppet/latest/function.html#capitalize)
      function.

    @return [String] The converted String, if it was a String that was given
    @return [Array[String]] The converted Array, if it was a Array that was given
    DOC
  ) do |arguments|
    raise(Puppet::ParseError, "capitalize(): Wrong number of arguments given (#{arguments.size} for 1)") if arguments.empty?

    value = arguments[0]

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

    result = if value.is_a?(Array)
               # Numbers in Puppet are often string-encoded which is troublesome ...
               value.map { |i| i.is_a?(String) ? i.capitalize : i }
             else
               value.capitalize
             end

    return result
  end
end