1 files changed, 44 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/member.rb b/lib/puppet/parser/functions/member.rb
new file mode 100644
index 0000000..43d76af
--- /dev/null
+++ b/lib/puppet/parser/functions/member.rb
@@ -0,0 +1,44 @@
+#
+# member.rb
+#
+
+# TODO(Krzysztof Wilczynski): We need to add support for regular expression ...
+# TODO(Krzysztof Wilczynski): Support for strings and hashes too ...
+
+module Puppet::Parser::Functions
+  newfunction(:member, :type => :rvalue, :doc => <<-EOS
+This function determines if a variable is a member of an array.
+
+*Examples:*
+
+    member(['a','b'], 'b')
+
+Would return: true
+
+    member(['a','b'], 'c')
+
+Would return: false
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "member(): Wrong number of arguments " +
+      "given (#{arguments.size} for 2)") if arguments.size < 2
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'member(): Requires array to work with')
+    end
+
+    item = arguments[1]
+
+    raise(Puppet::ParseError, 'member(): You must provide item ' +
+      'to search for within array given') if item.empty?
+
+    result = array.include?(item)
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :