76 lines
2.8 KiB
Python
76 lines
2.8 KiB
Python
from __future__ import unicode_literals
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import io
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import logging
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from django.core.files import File
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from django.utils.translation import ugettext_lazy as _
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from acls import ModelPermission
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from common import MayanAppConfig, menu_facet, menu_sidebar
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from django_gpg.exceptions import GPGDecryptionError
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from django_gpg.runtime import gpg
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from documents.models import Document, DocumentVersion
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from .links import (
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link_document_signature_delete, link_document_signature_download,
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link_document_signature_upload, link_document_verify
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)
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from .models import DocumentVersionSignature
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from .permissions import (
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permission_document_verify, permission_signature_delete,
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permission_signature_download, permission_signature_upload
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)
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logger = logging.getLogger(__name__)
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def document_pre_open_hook(descriptor, instance):
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if DocumentVersionSignature.objects.has_embedded_signature(document_version=instance):
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# If it has an embedded signature, decrypt
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try:
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result = gpg.decrypt_file(descriptor, close_descriptor=False)
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# gpg return a string, turn it into a file like object
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except GPGDecryptionError:
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# At least return the original raw content
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descriptor.seek(0)
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return descriptor
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else:
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descriptor.close()
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return io.BytesIO(result.data)
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else:
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return descriptor
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def document_version_post_save_hook(instance):
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logger.debug('instance: %s', instance)
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try:
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document_signature = DocumentVersionSignature.objects.get(document_version=instance)
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except DocumentVersionSignature.DoesNotExist:
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document_signature = DocumentVersionSignature.objects.create(document_version=instance)
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document_signature.check_for_embedded_signature()
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class DocumentSignaturesApp(MayanAppConfig):
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app_namespace = 'signatures'
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app_url = 'signatures'
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name = 'document_signatures'
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verbose_name = _('Document signatures')
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def ready(self):
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super(DocumentSignaturesApp, self).ready()
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DocumentVersion.register_post_save_hook(1, document_version_post_save_hook)
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DocumentVersion.register_pre_open_hook(1, document_pre_open_hook)
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ModelPermission.register(
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model=Document, permissions=(
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permission_document_verify, permission_signature_delete,
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permission_signature_download, permission_signature_upload,
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)
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)
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menu_facet.bind_links(links=[link_document_verify], sources=[Document])
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menu_sidebar.bind_links(links=[link_document_signature_upload, link_document_signature_download, link_document_signature_delete], sources=['signatures:document_verify', 'signatures:document_signature_upload', 'signatures:document_signature_download', 'signatures:document_signature_delete'])
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