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-rw-r--r--lib/puppet/parser/functions/swapcase.rb39
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/swapcase.rb b/lib/puppet/parser/functions/swapcase.rb
new file mode 100644
index 0000000..b9e6632
--- /dev/null
+++ b/lib/puppet/parser/functions/swapcase.rb
@@ -0,0 +1,39 @@
+#
+# swapcase.rb
+#
+
+module Puppet::Parser::Functions
+ newfunction(:swapcase, :type => :rvalue, :doc => <<-EOS
+This function will swap the existing case of a string.
+
+*Examples:*
+
+ swapcase("aBcD")
+
+Would result in: "AbCd"
+ EOS
+ ) do |arguments|
+
+ raise(Puppet::ParseError, "swapcase(): Wrong number of arguments " +
+ "given (#{arguments.size} for 1)") if arguments.size < 1
+
+ value = arguments[0]
+ klass = value.class
+
+ unless [Array, String].include?(klass)
+ raise(Puppet::ParseError, 'swapcase(): Requires either ' +
+ 'array or string to work with')
+ end
+
+ if value.is_a?(Array)
+ # Numbers in Puppet are often string-encoded which is troublesome ...
+ result = value.collect { |i| i.is_a?(String) ? i.swapcase : i }
+ else
+ result = value.swapcase
+ end
+
+ return result
+ end
+end
+
+# vim: set ts=2 sw=2 et :