events: Send events when user is created or updated.

Send the UserPreCreate event before a new user is created.
Send the UserPreUpdate event before a user is updated.

rhodecode/model/user.py

@@ -26,13 +26,13 @@ import logging
 import traceback
 
 import datetime
-from pylons import url
 from pylons.i18n.translation import _
 
 import ipaddress
 from sqlalchemy.exc import DatabaseError
 from sqlalchemy.sql.expression import true, false
 
+from rhodecode.events import UserPreCreate, UserPreUpdate
 from rhodecode.lib.utils2 import (
     safe_unicode, get_current_rhodecode_user, action_logger_generic,
     AttributeDict)
@@ -270,10 +270,12 @@ class UserModel(BaseModel):
                 # raises UserCreationError if it's not allowed for any reason to
                 # create new active user, this also executes pre-create hooks
                 check_allowed_create_user(user_data, cur_user, strict_check=True)
+            self.send_event(UserPreCreate(user_data))
             new_user = User()
             edit = False
         else:
             log.debug('updating user %s', username)
+            self.send_event(UserPreUpdate(user, user_data))
             new_user = user
             edit = True