from __future__ import absolute_import

from django.utils.translation import ugettext_lazy as _

from .models import DocumentVersionSignature
from .permissions import (
    PERMISSION_DOCUMENT_VERIFY,
    PERMISSION_SIGNATURE_UPLOAD,
    PERMISSION_SIGNATURE_DOWNLOAD
)


def has_embedded_signature(context):
    return DocumentVersionSignature.objects.has_embedded_signature(context['object'])


def doesnt_have_detached_signature(context):
    return DocumentVersionSignature.objects.has_detached_signature(context['object']) == False


document_signature_upload = {'text': _(u'upload signature'), 'view': 'document_signature_upload', 'args': 'object.pk', 'famfam': 'pencil_add', 'permissions': [PERMISSION_SIGNATURE_UPLOAD], 'conditional_disable': has_embedded_signature}
document_signature_download = {'text': _(u'download signature'), 'view': 'document_signature_download', 'args': 'object.pk', 'famfam': 'disk', 'permissions': [PERMISSION_SIGNATURE_DOWNLOAD], 'conditional_disable': doesnt_have_detached_signature}
document_verify = {'text': _(u'signatures'), 'view': 'document_verify', 'args': 'object.pk', 'famfam': 'text_signature', 'permissions': [PERMISSION_DOCUMENT_VERIFY]}