#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
/*
 *   Used to be generated by blitz/templates/resources/combined.vm
 *
 *   Copyright 2007 Glencoe Software, Inc. All rights reserved.
 *   Use is subject to license terms supplied in LICENSE.txt
 *
 */
"""

import omero.constants.permissions as ocp

import Ice
import IceImport
IceImport.load("omero_model_Permissions_ice")
_omero = Ice.openModule("omero")
_omero_model = Ice.openModule("omero.model")
__name__ = "omero.model"

"""Permissions class which implements Unix-like rw logic for user/group/world.

>>> p = PermissionsI()
object #0 (::omero::model::Permissions)
{
    perm1 = -35
}
"""


class PermissionsI(_omero_model.Permissions):

    def __init__(self, l=None):
        super(PermissionsI, self).__init__()
        self.__immutable = False
        self._restrictions = None
        if isinstance(l, str):
            self._perm1 = -1
            self.from_string(l)
        elif l is not None:
            self._perm1 = int(l)
        else:
            self._perm1 = -1

    def granted(self, mask, shift):
        return (self._perm1 & (mask << shift)) == (mask << shift)

    def set(self, mask, shift, on):
        self.throwIfImmutable()
        if on:
            self._perm1 = (self._perm1 | (0 | (mask << shift)))
        else:
            self._perm1 = (self._perm1 & (-1 ^ (mask << shift)))

    # shift 8; mask 4
    def isUserRead(self):
        return self.granted(4, 8)

    def setUserRead(self, value):
        self.set(4, 8, value)

    # shift 8; mask 2
    def isUserWrite(self):
        return self.granted(2, 8)

    def setUserWrite(self, value):
        self.set(2, 8, value)

    # shift 8; mask 1
    def isUserAnnotate(self):
        return self.granted(1, 8)

    def setUserAnnotate(self, value):
        self.set(1, 8, value)

    # shift 4; mask 4
    def isGroupRead(self):
        return self.granted(4, 4)

    def setGroupRead(self, value):
        self.set(4, 4, value)

    # shift 4; mask 2
    def isGroupWrite(self):
        return self.granted(2, 4)

    def setGroupWrite(self, value):
        self.set(2, 4, value)

    # shift 4; mask 1
    def isGroupAnnotate(self):
        return self.granted(1, 4)

    def setGroupAnnotate(self, value):
        self.set(1, 4, value)

    # shift 0; mask 4
    def isWorldRead(self):
        return self.granted(4, 0)

    def setWorldRead(self, value):
        self.set(4, 0, value)

    # shift 0; mask 2
    def isWorldWrite(self):
        return self.granted(2, 0)

    def setWorldWrite(self, value):
        self.set(2, 0, value)

    # shift 0; mask 1
    def isWorldAnnotate(self):
        return self.granted(1, 0)

    def setWorldAnnotate(self, value):
        self.set(1, 0, value)

    # Calculated values

    def isRestricted(self, restriction, current=None):
        rs = self._extendedRestrictions
        if rs is not None:
            return restriction in rs
        return False

    def isDisallow(self, restriction, current=None):
        rs = self._restrictions
        if rs is not None and len(rs) > restriction:
            return rs[restriction]
        return False

    def canAnnotate(self, current=None):
        return not self.isDisallow(ocp.ANNOTATERESTRICTION)

    def canDelete(self, current=None):
        return not self.isDisallow(ocp.DELETERESTRICTION)

    def canEdit(self, current=None):
        return not self.isDisallow(ocp.EDITRESTRICTION)

    def canLink(self, current=None):
        return not self.isDisallow(ocp.LINKRESTRICTION)

    def canChgrp(self, current=None):
        return not self.isDisallow(ocp.CHGRPRESTRICTION)

    def canChown(self, current=None):
        return not self.isDisallow(ocp.CHOWNRESTRICTION)

    # Accessors; do not use

    def getPerm1(self):
        return self._perm1

    def setPerm1(self, _perm1):
        self.throwIfImmutable()
        self._perm1 = _perm1
        pass

    def from_string(self, perms):
        """
        Sets the state of this instance via the 'perms' string.
        Returns 'self'. Also used by the constructor which
        takes a string.
        """
        import re
        base = r"([rR\-_])([aAwW\-_])"
        regex = re.compile(r"^(L?)%s$" % (base*3))
        match = regex.match(perms)
        if match is None:
            raise ValueError("Invalid permission string: %s" % perms)
        ur = match.group(2)
        uw = match.group(3)
        gr = match.group(4)
        gw = match.group(5)
        wr = match.group(6)
        ww = match.group(7)
        # User
        self.setUserRead(ur.lower() == "r")
        self.setUserAnnotate(uw.lower() == "a")
        if uw.lower() == "w":
            self.setUserAnnotate(True)  # w implies a
            self.setUserWrite(True)
        else:
            self.setUserWrite(False)
        # Group
        self.setGroupRead(gr.lower() == "r")
        self.setGroupAnnotate(gw.lower() == "a")
        if gw.lower() == "w":
            self.setGroupAnnotate(True)  # w implies a
            self.setGroupWrite(True)
        else:
            self.setGroupWrite(False)
        # World
        self.setWorldRead(wr.lower() == "r")
        self.setWorldAnnotate(ww.lower() == "a")
        if ww.lower() == "w":
            self.setWorldAnnotate(True)  # w implies a
            self.setWorldWrite(True)
        else:
            self.setWorldWrite(False)

        return self

    def __str__(self):
        vals = []
        # User
        vals.append(self.isUserRead() and "r" or "-")
        if self.isUserWrite():
            vals.append("w")
        elif self.isUserAnnotate():
            vals.append("a")
        else:
            vals.append("-")
        # Group
        vals.append(self.isGroupRead() and "r" or "-")
        if self.isGroupWrite():
            vals.append("w")
        elif self.isGroupAnnotate():
            vals.append("a")
        else:
            vals.append("-")
        # World
        vals.append(self.isWorldRead() and "r" or "-")
        if self.isWorldWrite():
            vals.append("w")
        elif self.isWorldAnnotate():
            vals.append("a")
        else:
            vals.append("-")
        return "".join(vals)

    def throwIfImmutable(self):
        """
        Check the __immutable field and throw a ClientError
        if it's true.
        """
        if self.__immutable:
            raise _omero.ClientError("ImmutablePermissions: %s" %
                                     self.__str__())

    def ice_postUnmarshal(self):
        """
        Provides additional initialization once all data loaded
        Required due to __getattr__ implementation.
        """
        # _omero_model.Permissions.ice_postUnmarshal(self)
        self.__immutable = True

    def ice_preMarshal(self):
        """
        Provides additional validation before data is sent
        Required due to __getattr__ implementation.
        """
        pass  # Currently unused

    def __getattr__(self, attr):
        if attr == "perm1":
            return self.getPerm1()
        else:
            raise AttributeError(attr)

    def __setattr__(self, attr, value):
        if attr.startswith("_"):
            self.__dict__[attr] = value
        else:
            try:
                object.__getattribute__(self, attr)
                object.__setattr__(self, attr, value)
            except AttributeError:
                if attr == "perm1":
                    return self.setPerm1(value)
                else:
                    raise

_omero_model.PermissionsI = PermissionsI


def _test():
    import doctest
    doctest.testmod()

if __name__ == "__main__":
    _test()
