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"""
Functions responsible for returning filenames for the given image generator.
Users are free to define their own functions; these are just some some sensible
choices.
"""
import os
from django.conf import settings
from ..utils import format_to_extension, suggest_extension
def source_name_as_path(generator):
"""
A namer that, given the following source file name::
photos/thumbnails/bulldog.jpg
will generate a name like this::
/path/to/generated/images/photos/thumbnails/bulldog/5ff3233527c5ac3e4b596343b440ff67.jpg
where "/path/to/generated/images/" is the value specified by the
``IMAGEKIT_CACHEFILE_DIR`` setting.
"""
source_filename = getattr(generator.source, 'name', None)
if source_filename is None or os.path.isabs(source_filename):
# Generally, we put the file right in the cache file directory.
dir = settings.IMAGEKIT_CACHEFILE_DIR
else:
# For source files with relative names (like Django media files),
# use the source's name to create the new filename.
dir = os.path.join(settings.IMAGEKIT_CACHEFILE_DIR,
os.path.splitext(source_filename)[0])
ext = suggest_extension(source_filename or '', generator.format)
return os.path.normpath(os.path.join(dir,
'%s%s' % (generator.get_hash(), ext)))
def source_name_dot_hash(generator):
"""
A namer that, given the following source file name::
photos/thumbnails/bulldog.jpg
will generate a name like this::
/path/to/generated/images/photos/thumbnails/bulldog.5ff3233527c5.jpg
where "/path/to/generated/images/" is the value specified by the
``IMAGEKIT_CACHEFILE_DIR`` setting.
"""
source_filename = getattr(generator.source, 'name', None)
if source_filename is None or os.path.isabs(source_filename):
# Generally, we put the file right in the cache file directory.
dir = settings.IMAGEKIT_CACHEFILE_DIR
else:
# For source files with relative names (like Django media files),
# use the source's name to create the new filename.
dir = os.path.join(settings.IMAGEKIT_CACHEFILE_DIR,
os.path.dirname(source_filename))
ext = suggest_extension(source_filename or '', generator.format)
basename = os.path.basename(source_filename)
return os.path.normpath(os.path.join(dir, '%s.%s%s' % (
os.path.splitext(basename)[0], generator.get_hash()[:12], ext)))
def hash(generator):
"""
A namer that, given the following source file name::
photos/thumbnails/bulldog.jpg
will generate a name like this::
/path/to/generated/images/5ff3233527c5ac3e4b596343b440ff67.jpg
where "/path/to/generated/images/" is the value specified by the
``IMAGEKIT_CACHEFILE_DIR`` setting.
"""
format = getattr(generator, 'format', None)
ext = format_to_extension(format) if format else ''
return os.path.normpath(os.path.join(settings.IMAGEKIT_CACHEFILE_DIR,
'%s%s' % (generator.get_hash(), ext)))
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