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 == 'A':
  41                     new_format = u'%(authors)s'
  42                 elif c == 'e':
  43                     new_format = u'%(extension)s'
  44                 elif c == 'f':
  45                     new_format = u'%(file)s'
  46                 elif c == 'G':
  47                     new_format = u'%(gname)s'
  48                 elif c == 'g':
  49                     new_format = u'%(gtitle)s'
  50                 elif c == 'l':
  51                     new_format = u'%(language)s'
  52                 elif c == 'n':
  53                     new_format = u'%(ser_no)d'
  54                 elif c == 's':
  55                     new_format = u'%(series)s'
  56                 elif c == 't':
  57                     new_format = u'%(title)s'
  58                 else:
  59                     raise ValueError('Bad format specifier "%%%c"' % c)
  60                 compiled.append(new_format)
  61             else:
  62                 compiled.append(c)
  63     compiled_format = ''.join(compiled)
  64
  65
  66 _library_path = None
  67
  68
  69 def download(book, dest_path=None, lib_path=None, a_format=None):
  70     if lib_path is None:
  71         global _library_path
  72         if _library_path is None:
  73             _library_path = get_config().getpath('library', 'path')
  74         lib_path = _library_path
  75
  76     global format, compile_format, compiled_format
  77     if a_format:
  78         compile_format = True
  79         format = a_format
  80     _compile_format()
  81     if compiled_format[-1] in ('\0', '\\', '/'):
  82         raise ValueError('Bad format: "%s"' % compiled_format)
  83     bdict = {}
  84     bdict['author1'] = book.author1
  85     bdict['authors'] = book.author_list
  86     bdict['extension'] = book.extension.name
  87     bdict['file'] = book.file
  88     genre = book.genres[0]
  89     bdict['gname'] = genre.name
  90     bdict['gtitle'] = genre.title
  91     bdict['language'] = book.language.name
  92     bdict['ser_no'] = book.ser_no or 0
  93     bdict['series'] = book.series
  94     bdict['title'] = book.title
  95     if '%(extension)s' not in compiled_format:
  96         compiled_format += '.%(extension)s'
  97     filename = compiled_format % bdict
  98     full_path = os.path.join(dest_path, filename)
  99     try:
 100         os.makedirs(os.path.dirname(full_path))
 101     except OSError:
 102         pass  # Already exists
 103     zf = ZipFile(os.path.join(lib_path, book.archive),  'r')
 104     infile = zf.open('%s.%s' % (book.file, book.extension.name))
 105     outfile = open(full_path, 'wb')
 106     copyfileobj(infile, outfile)
 107     outfile.close()
 108     infile.close()
 109     zf.close()
 110     dt = mktime(book.date.timetuple())
 111     os.utime(full_path, (dt, dt))
 112
 113
 114 def test():
 115     _compile_format()
 116     print(compiled_format)
 117
 118
 119 if __name__ == '__main__':
 120     test()