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# frozen_string_literal: true
#
# convert_base.rb
#
module Puppet::Parser::Functions
newfunction(:convert_base, type: :rvalue, arity: 2, doc: <<-DOC) do |args|
@summary
Converts a given integer or base 10 string representing an integer to a
specified base, as a string.
@return
converted value as a string
@example Example usage
convert_base(5, 2)` results in: `'101'`
convert_base('254', '16')` results in: `'fe'`
> *Note:*
Since Puppet 4.5.0 this can be done with the built-in
[`String.new`](https://puppet.com/docs/puppet/latest/function.html#integer-to-string)
function and its many formatting options:
`$binary_repr = String(5, '%b')` return `"101"`
`$hex_repr = String(254, "%x")` return `"fe"`
`$hex_repr = String(254, "%#x")` return `"0xfe"`
@return [String] The converted value as a String
DOC
raise Puppet::ParseError, 'convert_base(): First argument must be either a string or an integer' unless args[0].is_a?(Integer) || args[0].is_a?(String)
raise Puppet::ParseError, 'convert_base(): Second argument must be either a string or an integer' unless args[1].is_a?(Integer) || args[1].is_a?(String)
raise Puppet::ParseError, 'convert_base(): First argument must be an integer or a string corresponding to an integer in base 10' if args[0].is_a?(String) && !%r{^[0-9]+$}.match?(args[0])
raise Puppet::ParseError, 'convert_base(): First argument must be an integer or a string corresponding to an integer in base 10' if args[1].is_a?(String) && !%r{^[0-9]+$}.match?(args[1])
number_to_convert = args[0]
new_base = args[1]
number_to_convert = number_to_convert.to_i
new_base = new_base.to_i
raise Puppet::ParseError, 'convert_base(): base must be at least 2 and must not be greater than 36' unless new_base >= 2 && new_base <= 36
return number_to_convert.to_s(new_base)
end
end
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