Sith/sas/models.py

258 lines
7.8 KiB
Python

# -*- coding:utf-8 -*
#
# Copyright 2016,2017
# - Skia <skia@libskia.so>
#
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
# http://ae.utbm.fr.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License a published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#
from django.db import models
from django.core.urlresolvers import reverse
from django.core.cache import cache
from django.conf import settings
from django.utils.translation import ugettext_lazy as _
from django.utils import timezone
from PIL import Image
from io import BytesIO
import os
from core.models import SithFile, User
from core.utils import resize_image, exif_auto_rotate
class SASPictureManager(models.Manager):
def get_queryset(self):
return (
super(SASPictureManager, self)
.get_queryset()
.filter(is_in_sas=True, is_folder=False)
)
class SASAlbumManager(models.Manager):
def get_queryset(self):
return (
super(SASAlbumManager, self)
.get_queryset()
.filter(is_in_sas=True, is_folder=True)
)
class Picture(SithFile):
class Meta:
proxy = True
objects = SASPictureManager()
@property
def is_vertical(self):
with open(
os.path.join(settings.MEDIA_ROOT, self.file.name).encode("utf-8"), "rb"
) as f:
im = Image.open(BytesIO(f.read()))
(w, h) = im.size
return (w / h) < 1
return False
def can_be_edited_by(self, user):
return user.is_in_group(settings.SITH_GROUP_SAS_ADMIN_ID)
def can_be_viewed_by(self, user):
# SAS pictures are visible to old subscribers
# Result is cached 4s for this user
if user.is_anonymous:
return False
perm = cache.get("%d_can_view_pictures" % (user.id), False)
if perm:
return perm
perm = self.is_in_sas and self.is_moderated and user.was_subscribed
cache.set("%d_can_view_pictures" % (user.id), perm, timeout=4)
return perm
def get_download_url(self):
return reverse("sas:download", kwargs={"picture_id": self.id})
def get_download_compressed_url(self):
return reverse("sas:download_compressed", kwargs={"picture_id": self.id})
def get_download_thumb_url(self):
return reverse("sas:download_thumb", kwargs={"picture_id": self.id})
def get_absolute_url(self):
return reverse("sas:picture", kwargs={"picture_id": self.id})
def generate_thumbnails(self, overwrite=False):
im = Image.open(BytesIO(self.file.read()))
try:
im = exif_auto_rotate(im)
except:
pass
file = resize_image(im, max(im.size), self.mime_type.split("/")[-1])
thumb = resize_image(im, 200, self.mime_type.split("/")[-1])
compressed = resize_image(im, 1200, self.mime_type.split("/")[-1])
if overwrite:
self.file.delete()
self.thumbnail.delete()
self.compressed.delete()
self.file = file
self.file.name = self.name
self.thumbnail = thumb
self.thumbnail.name = self.name
self.compressed = compressed
self.compressed.name = self.name
self.save()
def rotate(self, degree):
for attr in ["file", "compressed", "thumbnail"]:
name = self.__getattribute__(attr).name
with open(
os.path.join(settings.MEDIA_ROOT, name).encode("utf-8"), "r+b"
) as file:
if file:
im = Image.open(BytesIO(file.read()))
file.seek(0)
im = im.rotate(degree, expand=True)
im.save(
fp=file,
format=self.mime_type.split("/")[-1].upper(),
quality=90,
optimize=True,
progressive=True,
)
def get_next(self):
if self.is_moderated:
return (
self.parent.children.filter(
is_moderated=True,
asked_for_removal=False,
is_folder=False,
id__gt=self.id,
)
.order_by("id")
.first()
)
else:
return (
Picture.objects.filter(id__gt=self.id, is_moderated=False)
.order_by("id")
.first()
)
def get_previous(self):
if self.is_moderated:
return (
self.parent.children.filter(
is_moderated=True,
asked_for_removal=False,
is_folder=False,
id__lt=self.id,
)
.order_by("id")
.last()
)
else:
return (
Picture.objects.filter(id__lt=self.id, is_moderated=False)
.order_by("-id")
.first()
)
class Album(SithFile):
class Meta:
proxy = True
objects = SASAlbumManager()
@property
def children_pictures(self):
return Picture.objects.filter(parent=self)
@property
def children_albums(self):
return Album.objects.filter(parent=self)
def can_be_edited_by(self, user):
# file = SithFile.objects.filter(id=self.id).first()
return user.is_in_group(
settings.SITH_GROUP_SAS_ADMIN_ID
) # or user.can_edit(file)
def can_be_viewed_by(self, user):
# file = SithFile.objects.filter(id=self.id).first()
return self.can_be_edited_by(user) or (
self.is_in_sas and self.is_moderated and user.was_subscribed
) # or user.can_view(file)
def get_absolute_url(self):
return reverse("sas:album", kwargs={"album_id": self.id})
def get_download_url(self):
return reverse("sas:album_preview", kwargs={"album_id": self.id})
def generate_thumbnail(self):
p = (
self.children_pictures.order_by("?").first()
or self.children_albums.exclude(file=None)
.exclude(file="")
.order_by("?")
.first()
)
if p and p.file:
im = Image.open(BytesIO(p.file.read()))
self.file = resize_image(im, 200, "jpeg")
self.file.name = self.name + "/thumb.jpg"
self.save()
def sas_notification_callback(notif):
count = Picture.objects.filter(is_moderated=False).count()
if count:
notif.viewed = False
else:
notif.viewed = True
notif.param = "%s" % count
notif.date = timezone.now()
class PeoplePictureRelation(models.Model):
"""
The PeoplePictureRelation class makes the connection between User and Picture
"""
user = models.ForeignKey(
User, verbose_name=_("user"), related_name="pictures", null=False, blank=False
)
picture = models.ForeignKey(
Picture,
verbose_name=_("picture"),
related_name="people",
null=False,
blank=False,
)
class Meta:
unique_together = ["user", "picture"]
def __str__(self):
return self.user.get_display_name() + " - " + str(self.picture)