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from django.db import models
from django.template.defaultfilters import slugify
import Image
from cStringIO import StringIO
from django.core.files.uploadedfile import SimpleUploadedFile, UploadedFile
import os
from settings import THUMBNAIL_SIZE
# Create your models here.
class Category(models.Model):
name = models.CharField(max_length=256)
slug = models.SlugField(max_length=256, unique=True, blank = True)
def save(self, *args, **kwargs):
if not self.slug:
self.slug = slugify(self.name)
return super(Category,self).save(*args,**kwargs)
@models.permalink
def get_absolute_url(self):
return ("wlscreens_category", None, { "category_slug": self.slug } )
def __unicode__(self):
return u"%s" % self.name
class Screenshot(models.Model):
name = models.CharField(max_length=256)
screenshot = models.ImageField(
upload_to= lambda i,n: "wlscreens/screens/%s/%s.%s" % (i.category,i.name,n.rsplit(".",1)[-1].lower()),
)
thumbnail = models.ImageField(
upload_to= lambda i,n: "wlscreens/thumbs/%s/%s.png" % (i.category,i.name),
editable = False,
)
comment = models.TextField( null = True, blank = True )
category = models.ForeignKey( Category, related_name = "screenshots" )
class Meta:
unique_together = ("name","category")
def save(self, *args, **kwargs):
if self.screenshot and not isinstance(self.screenshot, UploadedFile):
self.screenshot.delete(save=False)
if self.thumbnail and not isinstance(self.thumbnail, UploadedFile):
self.thumbnail.delete(save=False)
# Open original screenshot which we want to thumbnail using PIL's Image
# object
image = Image.open(self.screenshot)
# Convert to RGB if necessary
if image.mode not in ('L', 'RGB'):
image = image.convert('RGB')
image.thumbnail(THUMBNAIL_SIZE, Image.ANTIALIAS)
# Save the thumbnail
temp_handle = StringIO()
image.save(temp_handle, 'png')
temp_handle.seek(0)
# Save to the thumbnail field
suf = SimpleUploadedFile(os.path.split(self.screenshot.name)[-1],
temp_handle.read(), content_type='image/png')
self.thumbnail.save(suf.name+'.png', suf, save=False)
# Save this photo instance
super(Screenshot, self).save(*args,**kwargs)
def __unicode__(self):
return u"%s:%s" % (self.category.name,self.name)
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