This Django application adds support for numerical quotas based on
django.contrib.auth users, groups and permissions.

Quotas are configured with QUOTAS setting, which should be
a dictionary where keys are quota parameter name, and values are tuple
of limit values.  Application creates specific permissions based on
this specification.  For exaplne, setting:

    QUOTAS = {
        "user_number" : (1, 5, 20),
        "file_space" : (5, 10),
        }

would result in creating permissions: quotas.quota_user_number_1,
quotas.quota_user_number_5, quotas.quota_user_number_20,
quotas.quota_user_number_unlimited, quota.file_space_5,
quota.file_space_10. quota.file_space_unlimited.

Assigning specific quotas to users means assigning them (or their
groups) one of those permissions.  For convenience,
django.auth.models.User.quotas property is added.  Its attributes
reflect quota values for user, e.g. if user `u' has
`quotas.quota_user_number_5' permission, `u.quotas.user_number' equals
5.  If user has no permission asigned for the quota, attribute value
is `None'.  If user has unlimited quota, attribute value is
`quotas.UNLIMITED' sentinel, which is instance of quotas.Unlimited
class that is greater than any value, and it string representation is
'unlimited'.  If User instance has several quota permissions assigned,
attribute value reflects the highes quota.


Application is available on terms of the MIT license:

Copyright (c) 2009 Maciej Pasternacki <maciej@pasternacki.net>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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THE SOFTWARE.