# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1439678165 -7200
# Node ID 4bf280ba1c3633853fbd012a177fd804b44ece1a
# Parent  e43d62cc38328842e051624fc7b669e2fc677d39
Added a get_duration method to periods.
Removed the superfluous get_free_periods function.

diff -r e43d62cc3832 -r 4bf280ba1c36 imiptools/period.py
--- a/imiptools/period.py	Sat Aug 15 22:58:59 2015 +0200
+++ b/imiptools/period.py	Sun Aug 16 00:36:05 2015 +0200
@@ -79,6 +79,9 @@
     def get_end_point(self):
         return self.end
 
+    def get_duration(self):
+        return self.get_end_point() - self.get_start_point()
+
 class Period(PeriodBase):
 
     "A simple period abstraction."
@@ -428,23 +431,6 @@
     for replacement in replacements:
         insert_period(freebusy, replacement)
 
-def get_free_periods(freebusy, period, overlapping=False):
-
-    """
-    Return periods from 'freebusy' within which the given 'period' could be
-    inserted. If 'overlapping' is true, only return free periods that overlap
-    'period'.
-    """
-
-    free = invert_freebusy(freebusy)
-    if not free:
-        return None
-
-    if overlapping:
-        return get_overlapping(free, period)
-    else:
-        return free
-
 def coalesce_freebusy(freebusy):
 
     "Coalesce the periods in 'freebusy'."