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from django.template.defaultfilters import filesizeformat
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from django.contrib.staticfiles.templatetags.staticfiles import static
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FILE_STUB_IMAGE = 'images/file.png'
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FILE_TYPES_VIDEO = (
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'webm',
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'mp4',
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)
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FILE_TYPE_SVG = 'svg'
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FILE_TYPES_AUDIO = (
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'ogg',
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'mp3',
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'opus',
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)
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PLAIN_FILE_FORMATS = {
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'pdf': 'pdf',
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'djvu': 'djvu',
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'txt': 'txt',
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}
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def get_viewers():
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return AbstractViewer.__subclasses__()
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class AbstractViewer:
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def __init__(self, file, file_type):
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self.file = file
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self.file_type = file_type
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@staticmethod
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def supports(file_type):
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return True
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def get_view(self):
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return '<div class="image">'\
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'{}'\
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'<div class="image-metadata"><a href="{}" download >{}, {}</a></div>'\
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'</div>'.format(self.get_format_view(), self.file.url,
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self.file_type, filesizeformat(self.file.size))
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def get_format_view(self):
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if self.file_type in PLAIN_FILE_FORMATS:
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image = 'images/fileformats/{}.png'.format(
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PLAIN_FILE_FORMATS[self.file_type])
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else:
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image = FILE_STUB_IMAGE
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return '<a href="{}">'\
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'<img src="{}" width="200" height="150"/>'\
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'</a>'.format(self.file.url, static(image))
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class VideoViewer(AbstractViewer):
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@staticmethod
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def supports(file_type):
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return file_type in FILE_TYPES_VIDEO
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def get_format_view(self):
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return '<video width="200" height="150" controls src="{}"></video>'\
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.format(self.file.url)
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class AudioViewer(AbstractViewer):
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@staticmethod
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def supports(file_type):
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return file_type in FILE_TYPES_AUDIO
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def get_format_view(self):
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return '<audio controls src="{}"></audio>'.format(self.file.url)
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class SvgViewer(AbstractViewer):
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@staticmethod
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def supports(file_type):
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return file_type == FILE_TYPE_SVG
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def get_format_view(self):
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return '<a class="thumb" href="{}">'\
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'<img class="post-image-preview" width="200" height="150" src="{}" />'\
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'</a>'.format(self.file.url, self.file.url)
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