31 lines
1.2 KiB
Python
31 lines
1.2 KiB
Python
from django.apps import apps
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from ..utils.auth import has_perm
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from ..utils.collection import Collection
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from .models import Mediafile
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def get_permission_change_data(sender, permissions=None, **kwargs):
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"""
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Yields all necessary collections if 'mediafiles.can_see' permission changes.
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"""
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mediafiles_app = apps.get_app_config(app_label='mediafiles')
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for permission in permissions:
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# There could be only one 'mediafiles.can_see' and then we want to return data.
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if permission.content_type.app_label == mediafiles_app.label and permission.codename == 'can_see':
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yield from mediafiles_app.get_startup_elements()
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def required_users(sender, request_user, **kwargs):
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"""
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Returns all user ids that are displayed as uploaders in any mediafile
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if request_user can see mediafiles. This function may return an empty
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set.
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"""
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uploaders = set()
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if has_perm(request_user, 'mediafiles.can_see'):
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for mediafile_collection_element in Collection(Mediafile.get_collection_string()).element_generator():
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full_data = mediafile_collection_element.get_full_data()
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uploaders.add(full_data['uploader_id'])
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return uploaders
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