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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011 Free Software Foundation, Inc
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import Image
from mediagoblin.db.util import ObjectId
from celery.task import task
from mediagoblin import mg_globals as mgg
from contextlib import contextmanager
THUMB_SIZE = 180, 180
MEDIUM_SIZE = 640, 640
def create_pub_filepath(entry, filename):
return mgg.public_store.get_unique_filepath(
['media_entries',
unicode(entry['_id']),
filename])
@contextmanager
def closing(callback):
try:
yield callback
finally:
pass
@task
def process_media_initial(media_id):
workbench = mgg.workbench_manager.create_workbench()
entry = mgg.database.MediaEntry.one(
{'_id': ObjectId(media_id)})
queued_filepath = entry['queued_media_file']
queued_filename = workbench.localized_file(
mgg.queue_store, queued_filepath,
'source')
thumb = Image.open(queued_filename)
thumb.thumbnail(THUMB_SIZE, Image.ANTIALIAS)
# ensure color mode is compatible with jpg
if thumb.mode != "RGB":
thumb = thumb.convert("RGB")
thumb_filepath = create_pub_filepath(entry, 'thumbnail.jpg')
thumb_file = mgg.public_store.get_file(thumb_filepath, 'w')
with closing(thumb_file):
thumb.save(thumb_file, "JPEG", quality=90)
"""
If the size of the original file exceeds the specified size of a `medium`
file, a `medium.jpg` files is created and later associated with the media
entry.
"""
medium = Image.open(queued_filename)
medium_processed = False
if medium.size[0] > MEDIUM_SIZE[0] or medium.size[1] > MEDIUM_SIZE[1]:
medium.thumbnail(MEDIUM_SIZE, Image.ANTIALIAS)
if medium.mode != "RGB":
medium = medium.convert("RGB")
medium_filepath = create_pub_filepath(entry, 'medium.jpg')
medium_file = mgg.public_store.get_file(medium_filepath, 'w')
with closing(medium_file):
medium.save(medium_file, "JPEG", quality=90)
medium_processed = True
# we have to re-read because unlike PIL, not everything reads
# things in string representation :)
queued_file = file(queued_filename, 'rb')
with queued_file:
original_filepath = create_pub_filepath(entry, queued_filepath[-1])
with closing(mgg.public_store.get_file(original_filepath, 'wb')) as original_file:
original_file.write(queued_file.read())
mgg.queue_store.delete_file(queued_filepath)
entry['queued_media_file'] = []
media_files_dict = entry.setdefault('media_files', {})
media_files_dict['thumb'] = thumb_filepath
media_files_dict['original'] = original_filepath
if medium_processed:
media_files_dict['medium'] = medium_filepath
entry['state'] = u'processed'
entry.save()
# clean up workbench
workbench.destroy_self()
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