mirror of
https://github.com/pinry/pinry.git
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90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
import hashlib
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from django.db import models
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from taggit.managers import TaggableManager
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from ..core.models import User
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from .managers import OriginalImageManager
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from .managers import StandardImageManager
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from .managers import ThumbnailManager
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def hashed_upload_to(prefix, instance, filename):
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md5 = hashlib.md5()
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for chunk in instance.image.chunks():
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md5.update(chunk)
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file_hash = md5.hexdigest()
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arguments = {
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'prefix': prefix,
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'first': file_hash[0],
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'second': file_hash[1],
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'hash': file_hash,
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'filename': filename
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}
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return "{prefix}/{first}/{second}/{hash}/{filename}".format(**arguments)
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def original_upload_to(instance, filename):
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return hashed_upload_to('image/original/by-md5', instance, filename)
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def thumbnail_upload_to(instance, filename):
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return hashed_upload_to('image/thumbnail/by-md5', instance, filename)
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def standard_upload_to(instance, filename):
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return hashed_upload_to('image/standard/by-md5', instance, filename)
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class Image(models.Model):
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height = models.PositiveIntegerField(default=0, editable=False)
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width = models.PositiveIntegerField(default=0, editable=False)
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class Meta:
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abstract = True
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class OriginalImage(Image):
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image = models.ImageField(upload_to=original_upload_to,
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height_field='height', width_field='width', max_length=255)
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objects = OriginalImageManager()
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class StandardImage(Image):
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original = models.ForeignKey(OriginalImage, related_name='standard')
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image = models.ImageField(upload_to=standard_upload_to,
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height_field='height', width_field='width', max_length=255)
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objects = StandardImageManager()
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class Thumbnail(Image):
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original = models.ForeignKey(OriginalImage, related_name='thumbnail')
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image = models.ImageField(upload_to=thumbnail_upload_to,
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height_field='height', width_field='width', max_length=255)
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objects = ThumbnailManager()
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class Pin(models.Model):
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submitter = models.ForeignKey(User)
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url = models.TextField(blank=True, null=True)
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description = models.TextField(blank=True, null=True)
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original = models.ForeignKey(OriginalImage, related_name='pin')
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standard = models.ForeignKey(StandardImage, related_name='pin')
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thumbnail = models.ForeignKey(Thumbnail, related_name='pin')
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published = models.DateTimeField(auto_now_add=True)
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tags = TaggableManager()
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def __unicode__(self):
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return self.url
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def save(self, *args, **kwargs):
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if not self.pk:
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self.original = OriginalImage.objects.create_for_url(self.url)
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self.standard = StandardImage.objects.get_or_create_for(self.original)
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self.thumbnail = Thumbnail.objects.get_or_create_for(self.original)
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super(Pin, self).save(*args, **kwargs)
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class Meta:
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ordering = ['-id']
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