mirror of https://gitlab.crans.org/bde/nk20
60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
# Copyright (C) 2018-2021 by BDE ENS Paris-Saclay
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# SPDX-License-Identifier: GPL-3.0-or-later
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from django.contrib.auth.models import AnonymousUser
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from django.contrib.contenttypes.models import ContentType
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from django.template.defaultfilters import stringfilter
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from django import template
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from note_kfet.middlewares import get_current_authenticated_user, get_current_session
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from permission.backends import PermissionBackend
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@stringfilter
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def not_empty_model_list(model_name):
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"""
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Return True if and only if the current user has right to see any object of the given model.
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"""
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user = get_current_authenticated_user()
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session = get_current_session()
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if user is None or isinstance(user, AnonymousUser):
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return False
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elif user.is_superuser and session.get("permission_mask", -1) >= 42:
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return True
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qs = model_list(model_name)
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return qs.exists()
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@stringfilter
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def model_list(model_name, t="view", fetch=True):
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"""
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Return the queryset of all visible instances of the given model.
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"""
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user = get_current_authenticated_user()
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spl = model_name.split(".")
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ct = ContentType.objects.get(app_label=spl[0], model=spl[1])
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qs = ct.model_class().objects.filter(PermissionBackend.filter_queryset(user, ct, t))
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if user is None or isinstance(user, AnonymousUser):
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return qs.none()
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if fetch:
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qs = qs.all()
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return qs
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@stringfilter
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def model_list_length(model_name, t="view"):
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"""
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Return the length of queryset of all visible instances of the given model.
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"""
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return model_list(model_name, t, False).count()
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def has_perm(perm, obj):
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return PermissionBackend.check_perm(get_current_authenticated_user(), perm, obj)
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register = template.Library()
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register.filter('not_empty_model_list', not_empty_model_list)
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register.filter('model_list', model_list)
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register.filter('model_list_length', model_list_length)
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register.filter('has_perm', has_perm)
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