m_librarian/download.py

   1 #! /usr/bin/env python
   2
   3 from __future__ import print_function
   4 import os
   5 from time import mktime
   6 from shutil import copyfileobj
   7 from zipfile import ZipFile
   8 from .config import get_config
   9
  10 __all__ = ['download']
  11
  12
  13 format = '%f'
  14 compile_format = True
  15 compiled_format = '%(file)s'
  16
  17
  18 def _compile_format():
  19     global format, compile_format, compiled_format
  20     if not compile_format:
  21         return
  22     compile_format = False
  23     format = get_config().get('download', 'format')
  24     if not format:
  25         return
  26     got_percent = False
  27     compiled = []
  28     for c in format:
  29         if c == '%':
  30             if got_percent:
  31                 got_percent = False
  32                 compiled.append('%')
  33             else:
  34                 got_percent = True
  35         else:
  36             if got_percent:
  37                 got_percent = False
  38                 if c == 'a':
  39                     new_format = u'%(author1)s'
  40                 elif c == 'e':
  41                     new_format = u'%(extension)s'
  42                 elif c == 'f':
  43                     new_format = u'%(file)s'
  44                 elif c == 'G':
  45                     new_format = u'%(gname)s'
  46                 elif c == 'g':
  47                     new_format = u'%(gtitle)s'
  48                 elif c == 'l':
  49                     new_format = u'%(language)s'
  50                 elif c == 'n':
  51                     new_format = u'%(ser_no)d'
  52                 elif c == 's':
  53                     new_format = u'%(series)s'
  54                 elif c == 't':
  55                     new_format = u'%(title)s'
  56                 else:
  57                     raise ValueError('Bad format specifier "%%%c"' % c)
  58                 compiled.append(new_format)
  59             else:
  60                 compiled.append(c)
  61     compiled_format = ''.join(compiled)
  62
  63
  64 _library_path = None
  65
  66
  67 def download(book, dest_path=None, lib_path=None, a_format=None):
  68     if lib_path is None:
  69         global _library_path
  70         if _library_path is None:
  71             _library_path = get_config().getpath('library', 'path')
  72         lib_path = _library_path
  73
  74     global format, compile_format, compiled_format
  75     if a_format:
  76         compile_format = True
  77         format = a_format
  78     _compile_format()
  79     if compiled_format[-1] in ('\0', '\\', '/'):
  80         raise ValueError('Bad format: "%s"' % compiled_format)
  81     bdict = {}
  82     bdict['author1'] = book.author1
  83     bdict['extension'] = book.extension.name
  84     bdict['file'] = book.file
  85     genre = book.genres[0]
  86     bdict['gname'] = genre.name
  87     bdict['gtitle'] = genre.title
  88     bdict['language'] = book.language.name
  89     bdict['ser_no'] = book.ser_no or 0
  90     bdict['series'] = book.series
  91     bdict['title'] = book.title
  92     if '%(extension)s' not in compiled_format:
  93         compiled_format += '.%(extension)s'
  94     filename = compiled_format % bdict
  95     full_path = os.path.join(dest_path, filename)
  96     try:
  97         os.makedirs(os.path.dirname(full_path))
  98     except OSError:
  99         pass  # Already exists
 100     zf = ZipFile(os.path.join(lib_path, book.archive),  'r')
 101     infile = zf.open('%s.%s' % (book.file, book.extension.name))
 102     outfile = open(full_path, 'wb')
 103     copyfileobj(infile, outfile)
 104     outfile.close()
 105     infile.close()
 106     zf.close()
 107     dt = mktime(book.date.timetuple())
 108     os.utime(full_path, (dt, dt))
 109
 110
 111 def test():
 112     _compile_format()
 113     print(compiled_format)
 114
 115
 116 if __name__ == '__main__':
 117     test()