blob: f5c14d974f4b44c9a5c014a536a0b2f72c65b2db (
plain)
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 if re.search(r'%\(\w+\)s', titleformat)
14 else titleformat)
15
16 def format_to_regex(self, fmt):
17 r"""
18 Converts a string like
19 '%(title)s - %(artist)s'
20 to a regex like
21 '(?P<title>.+)\ \-\ (?P<artist>.+)'
22 """
23 lastpos = 0
24 regex = ''
25 # replace %(..)s with regex group and escape other string parts
26 for match in re.finditer(r'%\((\w+)\)s', fmt):
27 regex += re.escape(fmt[lastpos:match.start()])
28 regex += r'(?P<' + match.group(1) + '>.+)'
29 lastpos = match.end()
30 if lastpos < len(fmt):
31 regex += re.escape(fmt[lastpos:])
32 return regex
33
34 def run(self, info):
35 title = info['title']
36 match = re.match(self._titleregex, title)
37 if match is None:
38 self._downloader.to_screen(
39 '[fromtitle] Could not interpret title of video as "%s"'
40 % self._titleformat)
41 return [], info
42 for attribute, value in match.groupdict().items():
43 info[attribute] = value
44 self._downloader.to_screen(
45 '[fromtitle] parsed %s: %s'
46 % (attribute, value if value is not None else 'NA'))
47
48 return [], info
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