From ac39a3b330cbf7c4b65ba907783364b63fb109b3 Mon Sep 17 00:00:00 2001
From: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Date: Thu, 12 Apr 2007 10:35:45 +0000
Subject: Module\#define_structure method: define a new Struct only if doesn't
 exist already or if the attribute list changed

---
 lib/rbot/core/utils/extends.rb | 24 ++++++++++++++++++++++++
 lib/rbot/core/utils/utils.rb   |  1 -
 2 files changed, 24 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/rbot/core/utils/extends.rb b/lib/rbot/core/utils/extends.rb
index bcea735b..1aa6d457 100644
--- a/lib/rbot/core/utils/extends.rb
+++ b/lib/rbot/core/utils/extends.rb
@@ -13,6 +13,30 @@
 # Please note that global symbols have to be prefixed by :: because this plugin
 # will be read into an anonymous module
 
+# Extensions to the Module class
+#
+class ::Module
+
+  # Many plugins define Struct objects to hold their data. On rescans, lots of
+  # warnings are echoed because of the redefinitions. Using this method solves
+  # the problem, by checking if the Struct already exists, and if it has the
+  # same attributes
+  #
+  def define_structure(name, *members)
+    sym = name.to_sym
+    if Struct.const_defined?(sym)
+      kl = Struct.const_get(sym)
+      if kl.new.members.map { |member| member.intern } == members.map
+        debug "Struct #{sym} previously defined, skipping"
+        const_set(sym, kl)
+        return
+      end
+    end
+    debug "Defining struct #{sym} with members #{members.inspect}"
+    const_set(sym, Struct.new(name.to_s, *members))
+  end
+end
+
 
 # Extensions to the Array class
 #
diff --git a/lib/rbot/core/utils/utils.rb b/lib/rbot/core/utils/utils.rb
index 71b4c8d4..23d50c31 100644
--- a/lib/rbot/core/utils/utils.rb
+++ b/lib/rbot/core/utils/utils.rb
@@ -546,7 +546,6 @@ module ::Irc
       return retval
     end
 
-
   end
 end
 
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