--- /dev/null
+# -*- coding: utf-8 -*-
+
+import re
+
+from .common import PostProcessor
+from ..utils import PostProcessingError
+
+
+class MetadataFromTitlePPError(PostProcessingError):
+ pass
+
+
+class MetadataFromTitlePP(PostProcessor):
+ def __init__(self, downloader, titleformat):
+ self._titleformat = titleformat
+ self._titleregex = self.fmtToRegex(titleformat)
+
+ def fmtToRegex(self, fmt):
+ """
+ Converts a string like
+ '%(title)s - %(artist)s'
+ to a regex like
+ '(?P<title>.+)\ \-\ (?P<artist>.+)'
+ and a list of the named groups [title, artist]
+ """
+ lastpos = 0
+ regex = ""
+ groups = []
+ # replace %(..)s with regex group and escape other string parts
+ for match in re.finditer(r'%\((\w+)\)s', fmt):
+ regex += re.escape(fmt[lastpos:match.start()])
+ regex += r'(?P<' + match.group(1) + '>.+)'
+ lastpos = match.end()
+ if lastpos < len(fmt):
+ regex += re.escape(fmt[lastpos:len(fmt)])
+ return regex
+
+ def run(self, info):
+ title = info['title']
+ match = re.match(self._titleregex, title)
+ if match is None:
+ raise MetadataFromTitlePPError('Could not interpret title of video as "%s"' % self._titleformat)
+ for attribute, value in match.groupdict().items():
+ value = match.group(attribute)
+ info[attribute] = value
+ self._downloader.to_screen('[fromtitle] parsed ' + attribute + ': ' + value)
+
+ return True, info