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