# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1427821663 -7200
# Node ID 8d2dfe43b6293960aaa045368e38667a5d0aef32
# Parent  2358282130abc92a2f6f0675f3c9d5cb03c130ce
Fixed free/busy period conversion to retain the original period instance types.

diff -r 2358282130ab -r 8d2dfe43b629 imiptools/data.py
--- a/imiptools/data.py	Tue Mar 31 19:06:47 2015 +0200
+++ b/imiptools/data.py	Tue Mar 31 19:07:43 2015 +0200
@@ -381,6 +381,9 @@
         Period.__init__(self, start, end)
         self.origin = origin
 
+    def as_tuple(self):
+        return self.start, self.end, self.origin
+
     def __repr__(self):
         return "RecurringPeriod(%r, %r, %r)" % (self.start, self.end, self.origin)
 
@@ -500,11 +503,9 @@
         # Create a new period for free/busy purposes with the converted
         # datetime information.
 
-        l.append(
-            FreeBusyPeriod(
-                format_datetime(start), format_datetime(end),
-                *p.as_tuple()[2:]
-                ))
+        l.append(p.__class__(
+            *((format_datetime(start), format_datetime(end)) + p.as_tuple()[2:])
+            ))
 
     return l