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 :