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module Puppet::Parser::Functions
newfunction(:validate_slength, :doc => <<-'ENDHEREDOC') do |args|
Validate that the first argument is a string (or an array of strings), and
less/equal to than the length of the second argument. An optional third
parameter can be given a the minimum length. It fails if the first
argument is not a string or array of strings, and if arg 2 and arg 3 are
not convertable to a number.
The following values will pass:
validate_slength("discombobulate",17)
validate_slength(["discombobulate","moo"],17)
validate_slength(["discombobulate","moo"],17,3)
The following valueis will not:
validate_slength("discombobulate",1)
validate_slength(["discombobulate","thermometer"],5)
validate_slength(["discombobulate","moo"],17,10)
ENDHEREDOC
raise Puppet::ParseError, ("validate_slength(): Wrong number of arguments (#{args.length}; must be 2 or 3)") unless args.length == 2 or args.length == 3
unless (args[0].is_a?(String) or args[0].is_a?(Array))
raise Puppet::ParseError, ("validate_slength(): please pass a string, or an array of strings - what you passed didn't work for me at all - #{args[0].class}")
end
begin
max_length = args[1].to_i
rescue NoMethodError => e
raise Puppet::ParseError, ("validate_slength(): Couldn't convert whatever you passed as the max length parameter to an integer - sorry: " + e.message )
end
unless args.length == 2
begin
min_length = Integer(args[2])
rescue StandardError => e
raise Puppet::ParseError, ("validate_slength(): Couldn't convert whatever you passed as the min length parameter to an integer - sorry: " + e.message )
end
else
min_length = 0
end
raise Puppet::ParseError, ("validate_slength(): please pass a positive number as max_length") unless max_length > 0
raise Puppet::ParseError, ("validate_slength(): please pass a positive number as min_length") unless min_length >= 0
raise Puppet::ParseError, ("validate_slength(): please pass a min length that is smaller than the maximum") unless min_length <= max_length
case args[0]
when String
raise Puppet::ParseError, ("validate_slength(): #{args[0].inspect} is #{args[0].length} characters. It should have been between #{min_length} and #{max_length} characters") unless args[0].length <= max_length and min_length <= args[0].length
when Array
args[0].each do |arg|
if arg.is_a?(String)
unless ( arg.is_a?(String) and arg.length <= max_length and min_length <= arg.length)
raise Puppet::ParseError, ("validate_slength(): #{arg.inspect} is #{arg.length} characters. It should have been between #{min_length} and #{max_length} characters")
end
else
raise Puppet::ParseError, ("validate_slength(): #{arg.inspect} is not a string, it's a #{arg.class}")
end
end
else
raise Puppet::ParseError, ("validate_slength(): please pass a string, or an array of strings - what you passed didn't work for me at all - #{args[0].class}")
end
end
end
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