def create_thumbnail(uuid):
photo = Photo.query.filter(Photo.uuid == uuid).one()
try:
logging.info('processing photo {} '.format(photo.uuid))
# resize and add transparent background
size = (320, 320)
im = Image.open(urlopen(photo.url))
im.thumbnail(size, Image.ANTIALIAS)
background = Image.new('RGBA', size, (255, 255, 255, 0))
background.paste(im, (int(
(size[0] - im.size[0]) / 2), int((size[1] - im.size[1]) / 2)))
relative_filename = Path(uuid).with_suffix('.png')
filename = Path('/waldo-app-thumbs', uuid).with_suffix('.png')
background.save(filename, "png")
# todo: save in the location from the environment
thumbnail = Thumbnail(photo.uuid, 320, 320, str(relative_filename))
db_session.add(thumbnail)
photo.status = 'completed'
db_session.add(photo)
db_session.commit()
except Exception as e:
logging.error('generation error {} {}'.format(uuid, str(e)))
photo.status = 'failed'
db_session.add(photo)
db_session.commit()
