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import os.path
import io
import datetime
from PIL import Image
from django.core.exceptions import ValidationError
from django.db import models
from django.contrib.sitemaps import Sitemap
from django.utils.encoding import force_text
from django.urls import reverse
from django.apps import apps
from django.utils.html import format_html
from django.utils.text import slugify
from django.conf import settings
from django import forms
from resizeimage.imageexceptions import ImageSizeError
from .utils import resize_image
from django.db.models.signals import post_save
from django.dispatch import receiver
from django.db.models.signals import m2m_changed
def get_upload_path(self, filename):
return "images/original/%s/%s" % (datetime.datetime.today().strftime("%Y"), filename)
def get_vid_upload_path(self, filename):
return "images/videos/%s/%s" % (datetime.datetime.today().strftime("%Y"), filename)
class LuxImageSize(models.Model):
name = models.CharField(null=True, blank=True, max_length=30)
width = models.IntegerField(null=True, blank=True)
height = models.IntegerField(null=True, blank=True)
quality = models.IntegerField()
class Meta:
verbose_name_plural = 'Image Sizes'
def __str__(self):
if self.width:
size = self.width
if self.height:
size = self.height
return "%s - %s" %(self.name, str(size))
class LuxImage(models.Model):
image = models.FileField(blank=True, null=True, upload_to=get_upload_path)
title = models.CharField(null=True, blank=True, max_length=300)
alt = models.CharField(null=True, blank=True, max_length=300)
photo_credit_source = models.CharField(null=True, blank=True, max_length=300)
photo_credit_url = models.CharField(null=True, blank=True, max_length=300)
caption = models.TextField(blank=True, null=True)
pub_date = models.DateTimeField(default=datetime.datetime.now)
height = models.CharField(max_length=6, blank=True, null=True)
width = models.CharField(max_length=6, blank=True, null=True)
is_public = models.BooleanField(default=True)
sizes = models.ManyToManyField(LuxImageSize, blank=True)
class Meta:
ordering = ('-pub_date', 'id')
verbose_name_plural = 'Images'
get_latest_by = 'pub_date'
def __str__(self):
if self.title:
return "%s" % self.title
else:
return "%s" % self.pk
def get_type(self):
return str(self.__class__.__name__)
def get_admin_image(self):
for size in self.sizes.all():
if size.width and size.width <= 820 or size.height and size.height <= 800:
return self.get_image_by_size(size.name)
def get_admin_insert(self):
return "/media/images/%s/%s_tn.%s" % (self.pub_date.strftime("%Y"), self.get_image_name(), self.get_image_ext())
def get_largest_image(self):
t = []
for size in self.sizes.all():
t.append(size.width)
t.sort(key=float)
t.reverse()
return self.get_image_path_by_size(t[0])
def get_image_name(self):
return self.image.url.split("original/")[1][5:-4]
def get_image_ext(self):
return self.image.url[-3:]
def get_image_by_size(self, size="original"):
base = self.get_image_name()
if size == "admin_insert":
return "images/%s/%s.%s" % (self.pub_date.strftime("%Y"), base, self.get_image_ext())
if size == "original":
return "%soriginal/%s/%s.%s" % (settings.IMAGES_URL, self.pub_date.strftime("%Y"), base, self.get_image_ext())
else:
if size != 'tn':
s = LuxImageSize.objects.get(name=size)
if s not in self.sizes.all():
print("new size is "+s.name)
self.sizes.add(s)
return "%s%s/%s_%s.%s" % (settings.IMAGES_URL, self.pub_date.strftime("%Y"), base, size, self.get_image_ext())
def get_image_path_by_size(self, size="original"):
base = self.get_image_name()
if size == "original":
return "%s/original/%s/%s.%s" % (settings.IMAGES_ROOT, self.pub_date.strftime("%Y"), base, self.get_image_ext())
else:
return "%s/%s/%s_%s.%s" % (settings.IMAGES_ROOT, self.pub_date.strftime("%Y"), base, size, self.get_image_ext())
def admin_thumbnail(self):
return format_html('<a href="%s"><img src="%s"></a>' % (self.get_image_by_size(), self.get_image_by_size("tn")))
admin_thumbnail.short_description = 'Thumbnail'
@property
def get_previous_published(self):
return self.get_previous_by_pub_date()
@property
def get_next_published(self):
return self.get_next_by_pub_date()
@property
def get_previous_admin_url(self):
n = self.get_previous_by_pub_date()
return reverse('admin:%s_%s_change' %(self._meta.app_label, self._meta.model_name), args=[n.id] )
@property
def get_next_admin_url(self):
model = apps.get_model(app_label=self._meta.app_label, model_name=self._meta.model_name)
try:
return reverse('admin:%s_%s_change' %(self._meta.app_label, self._meta.model_name), args=[self.get_next_by_pub_date().pk] )
except model.DoesNotExist:
return ''
@property
def is_portait(self):
if int(self.height) > int(self.width):
return True
else:
return False
def save(self, *args, **kwargs):
super(LuxImage, self).save()
@receiver(post_save, sender=LuxImage)
def post_save_events(sender, update_fields, created, instance, **kwargs):
if instance.exif_raw == '':
filename, file_extension = os.path.splitext(instance.image.path)
if file_extension != ".mp4":
img = Image.open(instance.image.path)
instance.height = img.height
instance.width = img.width
#instance = readexif(instance)
post_save.disconnect(post_save_events, sender=LuxImage)
instance.save()
post_save.connect(post_save_events, sender=LuxImage)
@receiver(m2m_changed, sender=LuxImage.sizes.through)
def update_photo_sizes(sender, instance, **kwargs):
base_path = "%s/%s/" % (settings.IMAGES_ROOT, instance.pub_date.strftime("%Y"))
filename, file_extension = os.path.splitext(instance.image.path)
if file_extension != ".mp4":
img = Image.open(instance.image.path)
resize_image(img, 160, None, 78, base_path, "%s_tn.%s" % (instance.get_image_name(), instance.get_image_ext()))
for size in instance.sizes.all():
if size.width:
print("Image width is:"+str(img.width))
try:
if size.width <= img.width:
resize_image(img, size.width, None, size.quality, base_path, "%s_%s.%s" % (instance.get_image_name(), slugify(size.name), instance.get_image_ext()))
else:
raise ValidationError({'items': ["Size is larger than source image"]})
except ImageSizeError:
m2m_changed.disconnect(update_photo_sizes, sender=LuxImage.sizes.through)
instance.sizes.remove(size)
m2m_changed.connect(update_photo_sizes, sender=LuxImage.sizes.through)
if size.height:
try:
if size.height <= img.height:
resize_image(img, None, size.height, size.quality, base_path, "%s_%s.%s" % (instance.get_image_name(), slugify(size.name), instance.get_image_ext()))
else:
pass
except ImageSizeError:
m2m_changed.disconnect(update_photo_sizes, sender=LuxImage.sizes.through)
instance.sizes.remove(size)
m2m_changed.connect(update_photo_sizes, sender=LuxImage.sizes.through)
class LuxVideo(models.Model):
video_mp4 = models.FileField(blank=True, null=True, upload_to=get_vid_upload_path)
video_webm = models.FileField(blank=True, null=True, upload_to=get_vid_upload_path)
video_poster = models.FileField(blank=True, null=True, upload_to=get_vid_upload_path)
title = models.CharField(null=True, blank=True, max_length=300)
pub_date = models.DateTimeField(default=datetime.datetime.now)
youtube_url = models.CharField(null=True, blank=True, max_length=80)
vimeo_url = models.CharField(null=True, blank=True, max_length=300)
def __str__(self):
if self.title:
return self.title
else:
return str(self.pk)
def get_type(self):
return str(self.__class__.__name__)
class Meta:
ordering = ('-pub_date', 'id')
verbose_name_plural = 'Videos'
get_latest_by = 'pub_date'
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