__title__ = 'fobi.contrib.plugins.form_elements.content.content_image.helpers'
__author__ = 'Artur Barseghyan <artur.barseghyan@gmail.com>'
__copyright__ = 'Copyright (c) 2014 Artur Barseghyan'
__license__ = 'GPL 2.0/LGPL 2.1'
__all__ = (
'handle_uploaded_file', 'get_crop_filter', 'delete_file',
'ensure_unique_filename', 'clone_file'
)
import os
import glob
import logging
import uuid
import shutil
from django.conf import settings
from django.core.files.base import File
from fobi.contrib.plugins.form_elements.content.content_image.settings import (
IMAGES_UPLOAD_DIR, FIT_METHOD_CROP_SMART, FIT_METHOD_CROP_CENTER,
FIT_METHOD_CROP_SCALE
)
logger = logging.getLogger(__file__)
IMAGES_UPLOAD_DIR_ABSOLUTE_PATH = os.path.join(settings.MEDIA_ROOT, IMAGES_UPLOAD_DIR)
[docs]def ensure_unique_filename(destination):
"""
Makes sure filenames are never overwritten.
:param string destination:
:return string:
"""
if os.path.exists(destination):
filename, extension = os.path.splitext(destination)
return "{0}_{1}{2}".format(filename, uuid.uuid4(), extension)
else:
return destination
[docs]def handle_uploaded_file(image_file):
"""
:param django.core.files.uploadedfile.InMemoryUploadedFile image_file:
:return string: Path to the image (relative).
"""
if isinstance(image_file, File):
destination_path = ensure_unique_filename(os.path.join(IMAGES_UPLOAD_DIR_ABSOLUTE_PATH, image_file.name))
image_filename = image_file.name
with open(destination_path, 'wb+') as destination:
image_filename = os.path.basename(destination.name)
for chunk in image_file.chunks():
destination.write(chunk)
return os.path.join(IMAGES_UPLOAD_DIR, image_filename)
return image_file
[docs]def get_crop_filter(fit_method):
if fit_method in (FIT_METHOD_CROP_SMART, FIT_METHOD_CROP_CENTER, FIT_METHOD_CROP_SCALE):
return fit_method
[docs]def delete_file(image_file):
"""
Delete file from disc.
"""
try:
# Delete the main file.
file_path = os.path.join(settings.MEDIA_ROOT, image_file)
os.remove(file_path)
# Delete the sized version of it.
files = glob.glob("{0}*".format(file_path))
for f in files:
try:
os.remove(f)
except Exception as e:
logger.debug(str(e))
# If all goes well...
return True
except Exception as e:
logger.debug(str(e))
return False
[docs]def clone_file(source_filename, relative_path=True):
"""
Clones the file.
:param string source_filename: Source filename.
:return string: Filename of the cloned file.
"""
if source_filename.startswith(IMAGES_UPLOAD_DIR):
source_filename = os.path.join(settings.MEDIA_ROOT, source_filename)
destination_filename = ensure_unique_filename(source_filename)
try:
shutil.copyfile(source_filename, destination_filename)
if relative_path:
destination_filename = destination_filename.replace(settings.MEDIA_ROOT, '')
if destination_filename.startswith('/'):
destination_filename = destination_filename[1:]
return destination_filename
except Exception as e:
logger.debug(str(e))