X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=bluechips%2Fmodel%2Fexpenditure.py;h=296ecf04929aa2c3c66790d3f5a86a76cdcd88b9;hb=ed8863d32a4d626a02bf1c5c930253003068ea3f;hp=009ba3a561a0024df244137c829d15c58fd20f11;hpb=4d790b35771902dc80f38ec849d1bbc666cc55cc;p=bluechips.git

diff --git a/bluechips/model/expenditure.py b/bluechips/model/expenditure.py
index 009ba3a..296ecf0 100644
--- a/bluechips/model/expenditure.py
+++ b/bluechips/model/expenditure.py
@@ -28,6 +28,16 @@ class Expenditure(object):
         split_percentage = Decimal(100) / Decimal(residents.count())
         self.split(dict((resident, split_percentage) for resident in residents))
     
+    def update_split(self):
+        """
+        Re-split an expenditure using the same percentages as what is
+        currently in the database
+        """
+        
+        old_splits = meta.Session.query(Split).filter(Split.expenditure==self)
+        split_dict = dict((s.user, Decimal(int(s.share))) for s in old_splits)
+        self.split(split_dict)
+    
     def split(self, split_dict):
         """
         Split up an expenditure.
@@ -50,8 +60,11 @@ class Expenditure(object):
         
         total = sum(split_dict.itervalues())
         
-        for user, share in split_dict.iteritems():
-            split_dict[user] = share / total
+        for user, share in split_dict.items():
+            if share == 0:
+                del split_dict[user]
+            else:
+                split_dict[user] = share / total
             
         amounts_dict = dict()
         
@@ -65,12 +78,29 @@ class Expenditure(object):
                 winner = random.choice(amounts_dict.keys())
                 amounts_dict[winner] += Currency(1)
         elif difference < 0:
-            for i in xrange(difference):
+            for i in xrange(-difference):
                 winner = random.choice(amounts_dict.keys())
                 amounts_dict[winner] -= Currency(1)
         
         for user, share in amounts_dict.iteritems():
             s = Split(self, user, share)
-            meta.Session.save(s)
+            meta.Session.add(s)
+
+    def involves(self, user):
+        "Returns True if ``user`` is involved in this expenditure."
+        return (meta.Session.query(Split.id).\
+                filter(Split.expenditure == self).\
+                filter(Split.user == user).\
+                filter(Split.share != 0).first() is not None)
+
+    def share(self, user):
+        "Return the share corresponding to ``user``."
+        share = meta.Session.query(Split.share).\
+                filter(Split.expenditure == self).\
+                filter(Split.user == user).scalar()
+        if share is None:
+            return Currency(0)
+        else:
+            return share
 
 __all__ = ['Expenditure']