Move create_user to its own file.

(imported from commit b3dc11d3730634b35256dca940d479a81441c062)

zephyr/lib/create_user.py

@@ -0,0 +1,39 @@
+from django.conf import settings
+from django.contrib.auth.models import User
+from django.contrib.auth.models import UserManager
+from django.utils import timezone
+from zephyr.models import UserProfile
+import base64
+import hashlib
+
+# create_user_hack is the same as Django's User.objects.create_user,
+# except that we don't save to the database so it can used in
+# bulk_creates
+def create_user_hack(username, password, email, active):
+    now = timezone.now()
+    email = UserManager.normalize_email(email)
+    user = User(username=username, email=email,
+                is_staff=False, is_active=active, is_superuser=False,
+                last_login=now, date_joined=now)
+
+    if active:
+        user.set_password(password)
+    else:
+        user.set_unusable_password()
+    return user
+
+def create_user_base(email, password, active=True):
+    # NB: the result of Base32 + truncation is not a valid Base32 encoding.
+    # It's just a unique alphanumeric string.
+    # Use base32 instead of base64 so we don't have to worry about mixed case.
+    # Django imposes a limit of 30 characters on usernames.
+    email_hash = hashlib.sha256(settings.HASH_SALT + email).digest()
+    username = base64.b32encode(email_hash)[:30]
+    return create_user_hack(username, password, email, active)
+
+def create_user(email, password, realm, full_name, short_name,
+                active=True):
+    user = create_user_base(email=email, password=password,
+                            active=active)
+    user.save()
+    return UserProfile.create(user, realm, full_name, short_name)