- Add data classes for notifications

- Add basic API for notifications
- Change the password required to be a notification

data/database.py

@@ -271,9 +271,22 @@ class LogEntry(BaseModel):
   metadata_json = TextField(default='{}')
 
 
+class NotificationKind(BaseModel):
+  name = CharField(index=True)
+
+
+class Notification(BaseModel):
+  uuid = CharField(default=uuid_generator, index=True)
+  kind = ForeignKeyField(NotificationKind, index=True)
+  notification_user = ForeignKeyField(User, index=True)
+  metadata_json = TextField(default='{}')
+  created = DateTimeField(default=datetime.now, index=True)
+
+
 all_models = [User, Repository, Image, AccessToken, Role,
               RepositoryPermission, Visibility, RepositoryTag,
               EmailConfirmation, FederatedLogin, LoginService, QueueItem,
               RepositoryBuild, Team, TeamMember, TeamRole, Webhook,
               LogEntryKind, LogEntry, PermissionPrototype, ImageStorage,
-              BuildTriggerService, RepositoryBuildTrigger]
+              BuildTriggerService, RepositoryBuildTrigger, NotificationKind,
+              Notification]