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# IVLE - Informatics Virtual Learning Environment
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# Copyright (C) 2007-2008 The University of Melbourne
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# Module: Capabilities
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# Provides a Role class which is used for the "rolenm" field of login rows
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# This also provides a set of Caps (capabilities) and the ability to check if
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# any given role has a given capability.
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Role enumeration class. Provides values for "rolenm" fields, which are
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enumerable and comparable. Immutable objects.
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This allows you to check if a role has a certain capability by doing a
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>= comparison on the lowest role with that capability.
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Class Role has a capitalized member for each role, of type Role.
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eg. Role.STUDENT is a Role object describing the "student" role.
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_roles = ["anyone", "student", "marker", "tutor", "lecturer", "admin"]
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_roles_to_int = {} # Will be written after class def
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def __init__(self, role):
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"""Creates a new Role object.
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role may be any of the following types:
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* str: Role of that name, as given by the str of a Role
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(These correspond to the entries in the "rolenm" field of the DB).
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Raises an Exception if the string is not a role.
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* int: Role of that numeric index, as given by the fromEnum of a Role.
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(This is the same as calling toEnum).
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# Internally, stored as an int
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if isinstance(role, Role):
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self._role = role._role
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elif isinstance(role, str):
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self._role = Role._roles_to_int[role.lower()]
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raise Exception("Not a valid role name: %s" % repr(role))
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elif isinstance(role, int):
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if role >= 0 and role < len(Role._roles):
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raise Exception("Not a valid role ID: %d" % role)
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return Role._roles[self._role]
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return "Role.%s" % Role._roles[self._role].upper()
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def __cmp__(self, other):
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return cmp(self._role, other._role)
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return hash(self._role)
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"""Returns the int representation of this Role."""
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"""Given an int, returns the Role for that role ID."""
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def hasCap(self, capability):
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"""Given a capability (which is a Role object), returns True if this
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Role has that capability, False otherwise.
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return self >= capability
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# Role constants. These are actually members of the Role class, but they are
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# defined here because they actually have the type Role.
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for i in range(0, len(Role._roles)):
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# XXX This is the only way I could find to write an attribute to a
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# new-style class. It looks very dodgy.
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type.__setattr__(Role, Role._roles[i].upper(), Role(i))
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Role._roles_to_int[Role._roles[i]] = i
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### CAPABILITIES LISTING ###
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# Set of capabilities, which maps global variables onto Roles.
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# This provides the minimum role level required in order to perform the given
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# (So any role above the role specified can perform this cap).
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# Create users (the users are able to log in and accept)
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CAP_CREATEUSER = Role.ADMIN
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# Get details about users
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CAP_GETUSER = Role.LECTURER
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# Change all details of a user
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CAP_UPDATEUSER = Role.ADMIN
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# Posting to subject blog for subjects you are teaching
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CAP_BLOGPOST = Role.TUTOR
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# Reading submissions (both tutorial and assignment) of student for whom you
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CAP_READ_MY_STUDENTS_SUBMISSION = Role.TUTOR
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# Reading all students' submissions (in subjects you have this cap for)
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CAP_READ_SUBMISSION = Role.LECTURER
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# Reading marks for your own students
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CAP_READ_MY_STUDENTS_MARKS = Role.TUTOR
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# Adding marks info for your own students (can't delete or edit, only add)
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# (You can overwrite marks but old ones will be logged).
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CAP_WRITE_MY_STUDENTS_MARKS = Role.TUTOR
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# Reading marks for all students
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CAP_READ_MARKS = Role.LECTURER
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# Adding marks info for all students
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CAP_WRITE_MARKS = Role.LECTURER
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# Reading any student's svn (in subjects you have this cap for)
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CAP_READ_SVN = Role.LECTURER
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# Writing to any student's svn
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CAP_WRITE_SVN = Role.LECTURER
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# Create and modify projects and project sets
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CAP_MANAGEPROJECTS = Role.LECTURER
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# Create and modify project groups and assign logins to them
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CAP_MANAGEGROUPS = Role.TUTOR
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# "SuperUser" role - certain users are granted "sudo" powers on the Unix
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# system, giving them abilities beyond what is granted here in IVLE.
added
removed
lib/common/caps.py
