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- import hashlib
- import io
- from PIL import Image
- from django.core.files.images import ImageFile
- IMAGE_THUMBNAIL_SIZE = (32, 32)
- def create_css(theme, css):
- if css_exists(theme, css):
- delete_css(theme, css)
- save_css(theme, css)
- def css_exists(theme, css):
- return theme.css.filter(name=css.name).exists()
- def delete_css(theme, css):
- theme.css.get(name=css.name).delete()
- def save_css(theme, css):
- theme.css.create(
- name=css.name,
- file=css,
- hash=get_file_hash(css),
- size=css.size,
- )
- def create_image(theme, image):
- if image_exists(theme, image):
- delete_image(theme, image)
- save_image(theme, image)
- def image_exists(theme, image):
- return theme.images.filter(name=image.name).exists()
- def delete_image(theme, image):
- theme.images.get(name=image.name).delete()
- def save_image(theme, image):
- theme.images.create(
- name=image.name,
- file=image,
- hash=get_file_hash(image),
- type=image.content_type,
- size=image.size,
- thumbnail=get_image_thumbnail(image),
- )
- def get_image_thumbnail(image):
- img = Image.open(image.file)
- img.thumbnail(IMAGE_THUMBNAIL_SIZE)
- file = io.BytesIO()
- img.save(file, format="png")
- img.close()
- filename = image.name.split('.')[0]
- return ImageFile(file, name='thumb_%s.png' % filename)
- def get_file_hash(file):
- if file.size is None:
- return "000000000000"
- file_hash = hashlib.md5()
- for chunk in file.chunks():
- file_hash.update(chunk)
- return file_hash.hexdigest()[:12]
|
