Add ability to cache users by username on the UserFinder

This is very useful in the signoff message population script where we
are very likely to encounter the same users over and over.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/devel/utils.py b/devel/utils.py
index d7a154a..62b12cd 100644
--- a/devel/utils.py
+++ b/devel/utils.py
@@ -47,6 +47,7 @@ SELECT pr.user_id, COUNT(*), COUNT(p.flag_date)
 class UserFinder(object):
     def __init__(self):
         self.cache = {}
+        self.username_cache = {}
 
     @staticmethod
     def user_email(name, email):
@@ -111,7 +112,22 @@ class UserFinder(object):
         self.cache[userstring] = user
         return user
 
+    def find_by_username(self, username):
+        if not username:
+            return None
+        if username in self.username_cache:
+            return self.username_cache[username]
+
+        try:
+            user = User.objects.get(username=username)
+        except User.DoesNotExist:
+            user = None
+
+        self.username_cache[username] = user
+        return user
+
     def clear_cache(self):
         self.cache = {}
+        self.username_cache = {}
 
 # vim: set ts=4 sw=4 et: