1 | module Puppet::Parser::Functions
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2 |
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3 | newfunction(:validate_slength, :doc => <<-'ENDHEREDOC') do |args|
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4 | Validate that the first argument is a string (or an array of strings), and
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5 | less/equal to than the length of the second argument. An optional third
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6 | parameter can be given the minimum length. It fails if the first
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7 | argument is not a string or array of strings, and if arg 2 and arg 3 are
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8 | not convertable to a number.
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9 |
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10 | The following values will pass:
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11 |
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12 | validate_slength("discombobulate",17)
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13 | validate_slength(["discombobulate","moo"],17)
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14 | validate_slength(["discombobulate","moo"],17,3)
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15 |
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16 | The following valueis will not:
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17 |
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18 | validate_slength("discombobulate",1)
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19 | validate_slength(["discombobulate","thermometer"],5)
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20 | validate_slength(["discombobulate","moo"],17,10)
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21 |
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22 | ENDHEREDOC
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23 |
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24 | function_deprecation([:validate_slength, 'This method is deprecated, please use the stdlib validate_legacy function, with String[]. There is further documentation for validate_legacy function in the README.'])
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25 |
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26 | 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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27 |
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28 | input, max_length, min_length = *args
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29 |
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30 | begin
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31 | max_length = Integer(max_length)
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32 | raise ArgumentError if max_length <= 0
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33 | rescue ArgumentError, TypeError
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34 | raise Puppet::ParseError, "validate_slength(): Expected second argument to be a positive Numeric, got #{max_length}:#{max_length.class}"
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35 | end
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36 |
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37 | if min_length
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38 | begin
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39 | min_length = Integer(min_length)
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40 | raise ArgumentError if min_length < 0
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41 | rescue ArgumentError, TypeError
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42 | 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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43 | end
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44 | else
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45 | min_length = 0
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46 | end
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47 |
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48 | 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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49 |
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50 | validator = lambda do |str|
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51 | unless str.length <= max_length and str.length >= min_length
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52 | 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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53 | end
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54 | end
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55 |
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56 | case input
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57 | when String
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58 | validator.call(input)
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59 | when Array
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60 | input.each_with_index do |arg, pos|
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61 | if arg.is_a? String
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62 | validator.call(arg)
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63 | else
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64 | raise Puppet::ParseError, "validate_slength(): Expected element at array position #{pos} to be a String, got #{arg.class}"
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65 | end
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66 | end
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67 | else
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68 | raise Puppet::ParseError, "validate_slength(): Expected first argument to be a String or Array, got #{input.class}"
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69 | end
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70 | end
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71 | end
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