94 lines
2.8 KiB
Python
94 lines
2.8 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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openslides.mediafile.models
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Models for the mediafile app.
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:copyright: 2011–2013 by OpenSlides team, see AUTHORS.
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:license: GNU GPL, see LICENSE for more details.
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"""
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import mimetypes
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from django.db import models
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from django.utils.translation import ugettext_noop
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from openslides.utils.person.models import PersonField
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class Mediafile(models.Model):
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"""
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Class for uploaded files which can be delivered under a certain url.
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"""
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mediafile = models.FileField(upload_to='file')
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"""
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See https://docs.djangoproject.com/en/dev/ref/models/fields/#filefield
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for more information.
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"""
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title = models.CharField(max_length=255, unique=True)
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"""A string representing the title of the file."""
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uploader = PersonField(blank=True)
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"""A person – the uploader of a file."""
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timestamp = models.DateTimeField(auto_now_add=True)
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"""A DateTimeField to save the upload date and time."""
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filetype = models.CharField(max_length=255, editable=False)
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"""A string used to show the type of the file."""
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class Meta:
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"""
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Meta class for the mediafile model.
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"""
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ordering = ['title']
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permissions = (
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('can_see', ugettext_noop('Can see the list of files')),
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('can_upload', ugettext_noop('Can upload files')),
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('can_manage', ugettext_noop('Can manage files')),)
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def __unicode__(self):
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"""
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Method for representation.
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"""
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return self.title
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def save(self, *args, **kwargs):
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"""
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Method to read filetype and then save to the database.
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"""
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if self.mediafile:
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self.filetype = mimetypes.guess_type(self.mediafile.path)[0] or ugettext_noop('unknown')
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else:
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self.filetype = ugettext_noop('unknown')
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return super(Mediafile, self).save(*args, **kwargs)
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@models.permalink
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def get_absolute_url(self, link='update'):
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"""
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Returns the URL to a mediafile. The link can be 'update' or 'delete'.
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"""
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if link == 'update' or link == 'edit': # 'edit' ist only used until utils/views.py is fixed
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return ('mediafile_update', [str(self.id)])
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if link == 'delete':
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return ('mediafile_delete', [str(self.id)])
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def get_filesize(self):
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"""
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Transforms Bytes to Kilobytes or Megabytes. Returns the size as string.
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"""
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# TODO: Read http://stackoverflow.com/a/1094933 and think about it.
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size = self.mediafile.size
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if size < 1024:
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return '< 1 kB'
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if size >= 1024 * 1024:
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mB = size / 1024 / 1024
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return '%d MB' % mB
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else:
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kB = size / 1024
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return '%d kB' % kB
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