Initial changes to support the new Django 1.6 project structure

mayan/apps/document_signatures/models.py

@@ -0,0 +1,38 @@
+from __future__ import absolute_import
+import logging
+
+from django.db import models
+from django.utils.translation import ugettext_lazy as _
+
+from documents.models import DocumentVersion, get_filename_from_uuid
+from documents.conf.settings import STORAGE_BACKEND
+from django_gpg.runtime import gpg
+
+from .managers import DocumentVersionSignatureManager
+
+logger = logging.getLogger(__name__)
+
+
+class DocumentVersionSignature(models.Model):
+    """
+    Model that describes a document version signature properties
+    """
+    document_version = models.ForeignKey(DocumentVersion, verbose_name=_(u'document version'), editable=False)
+    signature_file = models.FileField(blank=True, null=True, upload_to=get_filename_from_uuid, storage=STORAGE_BACKEND(), verbose_name=_(u'signature file'), editable=False)
+    has_embedded_signature = models.BooleanField(default=False, verbose_name=_(u'has embedded signature'), editable=False)
+
+    objects = DocumentVersionSignatureManager()
+
+    def delete_detached_signature_file(self):
+        self.signature_file.storage.delete(self.signature_file.path)
+
+    def save(self, *args, **kwargs):
+        if not self.pk:
+            descriptor = self.document_version.open(raw=True)
+            self.has_embedded_signature = gpg.has_embedded_signature(descriptor)
+            descriptor.close()
+        super(DocumentVersionSignature, self).save(*args, **kwargs)
+
+    class Meta:
+        verbose_name = _(u'document version signature')
+        verbose_name_plural = _(u'document version signatures')