openmedialibrary/oml/media/__init__.py

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# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
from __future__ import division
import base64
import hashlib
import os
import ox
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import pdf
import epub
import txt
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def get_id(f=None, data=None):
if data:
return base64.b32encode(hashlib.sha1(data).digest())
else:
return base64.b32encode(ox.sha1sum(f).decode('hex'))
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def metadata(f):
ext = f.split('.')[-1]
data = {}
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data['extension'] = ext
data['size'] = os.stat(f).st_size
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if ext == 'pdf':
info = pdf.info(f)
elif ext == 'epub':
info = epub.info(f)
elif ext == 'txt':
info = txt.info(f)
for key in ('title', 'author', 'date', 'publisher', 'isbn'):
if key in info:
value = info[key]
if isinstance(value, str):
try:
value = value.decode('utf-8')
except:
value = None
if value:
data[key] = info[key]
if 'isbn' in data:
value = data.pop('isbn')
if len(value) == 10:
data['isbn10'] = value
data['mainid'] = 'isbn10'
else:
data['isbn13'] = value
data['mainid'] = 'isbn13'
if not 'title' in data:
data['title'] = os.path.splitext(os.path.basename(f))[0]
if 'author' in data and isinstance(data['author'], basestring):
data['author'] = [data['author']]
return data