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92 lines
2.9 KiB
92 lines
2.9 KiB
9 years ago
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# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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# Erik Stein <code@classlibrary.net>, 2016
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from django.db import models
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from django.utils.translation import ugexttext_lazy as _
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from imagekit.models import ImageSpecField
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from imagekit.processors import Adjust, Thumbnail, ResizeToFit
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from ..exceptions import ConversionNotApplicable
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from ..processors import Noop, Placeholder
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from .fields import MediaAssetFileField
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MEDIA_TYPE_CHOICES = (
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(UNKNOWN, _("unknown")),
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(IMAGE, _("image")),
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(MOVIE, _("movie")),
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(AUDIO, _("audio")),
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(PDF, _("pdf")),
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(SVG, _("svg")),
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(VECTOR, _("eps")),
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(DOCUMENT, _("document")),
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)
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class ImageMediaHandler(object):
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# thumbnail = ImageSpecField(ThumbnailSpec)
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thumbnail = ImageSpecField(source='file',
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processors=[Adjust(contrast=1.2, sharpness=1.1),
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Thumbnail(100, 50)],
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format='JPEG', options={'quality': 90})
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# class PDFFile(object)
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# def get_page(self, num):
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# def get_page_count(self):
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class PDFMediaHandler(object):
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# thumbnail = ImageSpec
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# small_downloadable = PDFSpecField
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def page_count(self):
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# self.original_file = PDFFile()
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return count(self.original_file.pages)
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class MovieMediaHandler(object):
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# thumbnail = ImageSpec
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# desktop_webm = MovieSpecField
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# desktop_mp4 = MovieSpecField
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pass
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class MediaAsset(models.Model):
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"""
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TODO Django should have a internal=True parameter on FileFields, preventing URL based access to the files
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Depending on the type the Asset might have different
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"""
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# TODO Added uuid field
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original_file = MediaAssetFileField(_("original file"), metadata_field='metadata')
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original_mimetype = models.CharField(_("mimetype"), blank=True, max_length=50)
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metadata = models.JSONField()
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media_type = models.ChoiceField(_("media type"), blank=True, choices=MEDIA_TYPE_CHOICES, default=MEDIA_TYPE_CHOICES[0][0])
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description = models.TextField(_("internal description"), null=True, blank=True)
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slug = SlugField(help_text=_("should contain only the most specific part of the description, e.g.\"poster\"; the whole filename will be automatically build from the object the asset is attached and "))
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# copyright = models.TextField(_("copyright"), null=True, blank=True)
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# author = models.TextField(_("author"), null=True, blank=True)
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def save(self, *args, **kwargs):
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# TODO Fill media_type field
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# TODO Fill mimetype field
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super(MediaAsset, self).save(*args, **kwargs)
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@property
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def media_handler(self):
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"""
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Returns a media_handler instance depending on the type
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of the original file.
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>>> m = MediaAsset.objects.first()
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>>> m.original_file
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'media/0/reference.png'
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>>> m.media_handler.thumbnail
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"""
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