70 lines
2.5 KiB
Ruby
70 lines
2.5 KiB
Ruby
module Puppet::Parser::Functions
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newfunction(:validate_slength, :doc => <<-'ENDHEREDOC') do |args|
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Validate that the first argument is a string (or an array of strings), and
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less/equal to than the length of the second argument. An optional third
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parameter can be given the minimum length. It fails if the first
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argument is not a string or array of strings, and if arg 2 and arg 3 are
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not convertable to a number.
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The following values will pass:
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validate_slength("discombobulate",17)
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validate_slength(["discombobulate","moo"],17)
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validate_slength(["discombobulate","moo"],17,3)
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The following valueis will not:
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validate_slength("discombobulate",1)
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validate_slength(["discombobulate","thermometer"],5)
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validate_slength(["discombobulate","moo"],17,10)
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ENDHEREDOC
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raise Puppet::ParseError, "validate_slength(): Wrong number of arguments (#{args.length}; must be 2 or 3)" unless args.length == 2 or args.length == 3
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input, max_length, min_length = *args
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begin
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max_length = Integer(max_length)
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raise ArgumentError if max_length <= 0
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rescue ArgumentError, TypeError
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raise Puppet::ParseError, "validate_slength(): Expected second argument to be a positive Numeric, got #{max_length}:#{max_length.class}"
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end
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if min_length
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begin
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min_length = Integer(min_length)
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raise ArgumentError if min_length < 0
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rescue ArgumentError, TypeError
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raise Puppet::ParseError, "validate_slength(): Expected third argument to be unset or a positive Numeric, got #{min_length}:#{min_length.class}"
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end
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else
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min_length = 0
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end
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raise Puppet::ParseError, "validate_slength(): Expected second argument to be equal to or larger than third argument" unless max_length >= min_length
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validator = lambda do |str|
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unless str.length <= max_length and str.length >= min_length
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raise Puppet::ParseError, "validate_slength(): Expected length of #{input.inspect} to be between #{min_length} and #{max_length}, was #{input.length}"
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end
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end
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case input
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when String
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validator.call(input)
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when Array
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input.each_with_index do |arg, pos|
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if arg.is_a? String
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validator.call(arg)
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else
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raise Puppet::ParseError, "validate_slength(): Expected element at array position #{pos} to be a String, got #{arg.class}"
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end
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end
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else
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raise Puppet::ParseError, "validate_slength(): Expected first argument to be a String or Array, got #{input.class}"
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end
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end
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end
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