mirror of https://gitlab.crans.org/bde/nk20
62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
# Copyright (C) 2018-2024 by BDE ENS Paris-Saclay
|
|
# SPDX-License-Identifier: GPL-3.0-or-later
|
|
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.template.defaultfilters import stringfilter
|
|
from django import template
|
|
from note_kfet.middlewares import get_current_request
|
|
|
|
from ..backends import PermissionBackend
|
|
|
|
|
|
@stringfilter
|
|
def not_empty_model_list(model_name):
|
|
"""
|
|
Return True if and only if the current user has right to see any object of the given model.
|
|
"""
|
|
request = get_current_request()
|
|
user = request.user
|
|
session = request.session
|
|
if user is None or not user.is_authenticated:
|
|
return False
|
|
elif user.is_superuser and session.get("permission_mask", -1) >= 42:
|
|
return True
|
|
qs = model_list(model_name)
|
|
return qs.exists()
|
|
|
|
|
|
@stringfilter
|
|
def model_list(model_name, t="view", fetch=True):
|
|
"""
|
|
Return the queryset of all visible instances of the given model.
|
|
"""
|
|
request = get_current_request()
|
|
user = request.user
|
|
spl = model_name.split(".")
|
|
ct = ContentType.objects.get(app_label=spl[0], model=spl[1])
|
|
qs = ct.model_class().objects.filter(PermissionBackend.filter_queryset(request, ct, t))
|
|
if user is None or not user.is_authenticated:
|
|
return qs.none()
|
|
if fetch:
|
|
qs = qs.all()
|
|
return qs
|
|
|
|
|
|
@stringfilter
|
|
def model_list_length(model_name, t="view"):
|
|
"""
|
|
Return the length of queryset of all visible instances of the given model.
|
|
"""
|
|
return model_list(model_name, t, False).count()
|
|
|
|
|
|
def has_perm(perm, obj):
|
|
return PermissionBackend.check_perm(get_current_request(), perm, obj)
|
|
|
|
|
|
register = template.Library()
|
|
register.filter('not_empty_model_list', not_empty_model_list)
|
|
register.filter('model_list', model_list)
|
|
register.filter('model_list_length', model_list_length)
|
|
register.filter('has_perm', has_perm)
|