django-assetkit/assetkit/specs/__init__.py

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
# Erik Stein <code@classlibrary.net>, 2016


class UniversalThumbnail(ImageSpec):
    """
    Produces thumbnail images from any type of media, using
    per-type initial conversion to an image.
    """
    slug = 'thumbnail'
    not_applicable_types = (UNKNOWN, AUDIO, DOCUMENT)
    base_conversion_map = {
        IMAGE: [],
        MOVIE: [],
    }
    _processors = [ResizeToFill(100, 50)]
    format = 'JPEG'
    options = {'quality': 60}

    @property
    def processors(self):
        instance, field_name = get_field_info(self.source)
        if instance.media_type in self.not_applicable_types:
            raise ConversionNotApplicable

        if instance.media_type == 1:
            pass

        processors = self.base_conversion_map[instance.media_type]


    """
    Dynamic spec, depending on the source's media type
    e.g. first convert a movie to an image, depending on a time code
    for the movie poster

    see http://django-imagekit.readthedocs.org/en/develop/advanced_usage.html#specs-that-change
    """