Raphaël G. Git Repositories - youtubedl/blob - youtube_dl/postprocessor/metadatafromtitle.py

   1 from __future__ import unicode_literals
   2
   3 import re
   4
   5 from .common import PostProcessor
   6
   7
   8 class MetadataFromTitlePP(PostProcessor):
   9     def __init__(self, downloader, titleformat):
  10         super(MetadataFromTitlePP, self).__init__(downloader)
  11         self._titleformat = titleformat
  12         self._titleregex = self.format_to_regex(titleformat)
  13
  14     def format_to_regex(self, fmt):
  15         """
  16         Converts a string like
  17            '%(title)s - %(artist)s'
  18         to a regex like
  19            '(?P<title>.+)\ \-\ (?P<artist>.+)'
  20         """
  21         lastpos = 0
  22         regex = ''
  23         # replace %(..)s with regex group and escape other string parts
  24         for match in re.finditer(r'%\((\w+)\)s', fmt):
  25             regex += re.escape(fmt[lastpos:match.start()])
  26             regex += r'(?P<' + match.group(1) + '>.+)'
  27             lastpos = match.end()
  28         if lastpos < len(fmt):
  29             regex += re.escape(fmt[lastpos:len(fmt)])
  30         return regex
  31
  32     def run(self, info):
  33         title = info['title']
  34         match = re.match(self._titleregex, title)
  35         if match is None:
  36             self._downloader.to_screen('[fromtitle] Could not interpret title of video as "%s"' % self._titleformat)
  37             return [], info
  38         for attribute, value in match.groupdict().items():
  39             value = match.group(attribute)
  40             info[attribute] = value
  41             self._downloader.to_screen('[fromtitle] parsed ' + attribute + ': ' + value)
  42
  43         return [], info