Coalescing nullable DTO properties

1 files changed, 10 insertions, 3 deletions

diff --git a/jfr_playoff/dto.py b/jfr_playoff/dto.py
index a1b3a7f..a88cd2b 100644
--- a/jfr_playoff/dto.py
+++ b/jfr_playoff/dto.py
@@ -1,11 +1,18 @@
 import sys
 
+def coalesce(*arg):
+    for el in arg:
+        if el is not None:
+            return el
+    return None
+
+
 class Team(object):
     name = ''
     score = 0.0
 
     def __unicode__(self):
-        return u'%s (%.1f)' % (self.name, self.score)
+        return u'%s (%.1f)' % (coalesce(self.name, '<None>'), self.score)
 
     def __repr__(self):
         return unicode(self).encode(sys.stdin.encoding)
@@ -23,7 +30,7 @@ class Match(object):
 
     def __repr__(self):
         return (u'#%d (%s) %s [%s]' % (
-            self.id, self.link, [unicode(team) for team in self.teams],
+            self.id, coalesce(self.link, '<None>'), [unicode(team) for team in self.teams],
             u'finished' if self.running < 0 else (
                 u'%d boards' % self.running))
         ).encode(sys.stdin.encoding)
@@ -37,7 +44,7 @@ class Phase(object):
 
     def __repr__(self):
         return u'%s (%s) <%d matches> [%srunning]' % (
-            self.title, self.link,
+            self.title, coalesce(self.link, '<None>'),
             len(self.matches), '' if self.running else 'not ')
 
 __all__ = ('Team', 'Match', 'Phase')