mirror of
https://github.com/jazzband/django-avatar.git
synced 2026-03-16 22:20:30 +00:00
120 lines
4.2 KiB
Python
120 lines
4.2 KiB
Python
import datetime
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import os.path
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from django.db import models
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from django.core.files.base import ContentFile
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from django.utils.translation import ugettext as _
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from django.utils.hashcompat import md5_constructor
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from django.contrib.auth.models import User
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try:
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from cStringIO import StringIO
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dir(StringIO) # Placate PyFlakes
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except ImportError:
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from StringIO import StringIO
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try:
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from PIL import Image
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dir(Image) # Placate PyFlakes
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except ImportError:
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import Image
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from avatar import AVATAR_STORAGE_DIR, AVATAR_RESIZE_METHOD, \
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AVATAR_MAX_AVATARS_PER_USER, AVATAR_THUMB_FORMAT, \
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AVATAR_HASH_USERDIRNAMES, AVATAR_HASH_FILENAMES, \
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AVATAR_THUMB_QUALITY
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def avatar_file_path(instance=None, filename=None, size=None, ext=None):
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tmppath = [AVATAR_STORAGE_DIR]
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if AVATAR_HASH_USERDIRNAMES:
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tmp = md5_constructor(instance.user.username).hexdigest()
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tmppath.extend([tmp[0], tmp[1], instance.user.username])
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else:
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tmppath.append(instance.user.username)
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if not filename:
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# Filename already stored in database
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filename = instance.avatar.name
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if ext and AVATAR_HASH_FILENAMES:
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# An extension was provided, probably because the thumbnail
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# is in a different format than the file. Use it. Because it's
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# only enabled if AVATAR_HASH_FILENAMES is true, we can trust
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# it won't conflict with another filename
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(root, oldext) = os.path.splitext(filename)
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filename = root + "." + ext
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else:
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# File doesn't exist yet
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if AVATAR_HASH_FILENAMES:
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(root, ext) = os.path.splitext(filename)
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filename = md5_constructor(filename).hexdigest()
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filename = filename + ext
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if size:
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tmppath.extend(['resized', str(size)])
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tmppath.append(os.path.basename(filename))
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return os.path.join(*tmppath)
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def find_extension(format):
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format = format.lower()
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if format == 'jpeg':
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format = 'jpg'
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return format
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class Avatar(models.Model):
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user = models.ForeignKey(User)
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primary = models.BooleanField(default=False)
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avatar = models.ImageField(max_length=1024, upload_to=avatar_file_path, blank=True)
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date_uploaded = models.DateTimeField(default=datetime.datetime.now)
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def __unicode__(self):
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return _(u'Avatar for %s') % self.user
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def save(self, force_insert=False, force_update=False):
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avatars = Avatar.objects.filter(user=self.user).exclude(id=self.id)
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if AVATAR_MAX_AVATARS_PER_USER > 1:
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if self.primary:
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avatars = avatars.filter(primary=True)
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avatars.update(primary=False)
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else:
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avatars.delete()
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super(Avatar, self).save(force_insert, force_update)
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def thumbnail_exists(self, size):
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return self.avatar.storage.exists(self.avatar_name(size))
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def create_thumbnail(self, size, quality=None):
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try:
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orig = self.avatar.storage.open(self.avatar.name, 'rb').read()
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image = Image.open(StringIO(orig))
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except IOError:
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return # What should we do here? Render a "sorry, didn't work" img?
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quality = quality or AVATAR_THUMB_QUALITY
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(w, h) = image.size
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if w != size or h != size:
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if w > h:
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diff = (w - h) / 2
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image = image.crop((diff, 0, w - diff, h))
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else:
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diff = (h - w) / 2
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image = image.crop((0, diff, w, h - diff))
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image = image.resize((size, size), AVATAR_RESIZE_METHOD)
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if image.mode != "RGB":
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image = image.convert("RGB")
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thumb = StringIO()
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image.save(thumb, AVATAR_THUMB_FORMAT, quality=quality)
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thumb_file = ContentFile(thumb.getvalue())
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else:
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thumb_file = ContentFile(orig)
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thumb = self.avatar.storage.save(self.avatar_name(size), thumb_file)
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def avatar_url(self, size):
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return self.avatar.storage.url(self.avatar_name(size))
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def avatar_name(self, size):
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ext = find_extension(AVATAR_THUMB_FORMAT)
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return avatar_file_path(
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instance=self,
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size=size,
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ext=ext
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)
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