45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
from __future__ import unicode_literals
|
|
|
|
import logging
|
|
import uuid
|
|
|
|
from django.db import models
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
from django_gpg.runtime import gpg
|
|
from documents.models import DocumentVersion
|
|
from documents.runtime import storage_backend
|
|
|
|
from .managers import DocumentVersionSignatureManager
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def upload_to(*args, **kwargs):
|
|
return unicode(uuid.uuid4())
|
|
|
|
|
|
class DocumentVersionSignature(models.Model):
|
|
"""
|
|
Model that describes a document version signature properties
|
|
"""
|
|
document_version = models.ForeignKey(DocumentVersion, verbose_name=_('Document version'), editable=False)
|
|
signature_file = models.FileField(blank=True, null=True, upload_to=upload_to, storage=storage_backend, verbose_name=_('Signature file'))
|
|
has_embedded_signature = models.BooleanField(default=False, verbose_name=_('Has embedded signature'))
|
|
|
|
objects = DocumentVersionSignatureManager()
|
|
|
|
def delete_detached_signature_file(self):
|
|
self.signature_file.storage.delete(self.signature_file.path)
|
|
|
|
def check_for_embedded_signature(self):
|
|
logger.debug('checking for embedded signature')
|
|
|
|
with self.document_version.open(raw=True) as file_object:
|
|
self.has_embedded_signature = gpg.has_embedded_signature(file_object)
|
|
self.save()
|
|
|
|
class Meta:
|
|
verbose_name = _('Document version signature')
|
|
verbose_name_plural = _('Document version signatures')
|