74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
from __future__ import unicode_literals
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import re
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from .common import PostProcessor
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from ..compat import compat_str
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from ..utils import str_or_none
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class MetadataFromFieldPP(PostProcessor):
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regex = r'(?P<in>.+):(?P<out>.+)$'
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def __init__(self, downloader, formats):
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PostProcessor.__init__(self, downloader)
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assert isinstance(formats, (list, tuple))
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self._data = []
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for f in formats:
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assert isinstance(f, compat_str)
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match = re.match(self.regex, f)
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assert match is not None
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self._data.append({
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'in': match.group('in'),
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'out': match.group('out'),
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'tmpl': self.field_to_template(match.group('in')),
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'regex': self.format_to_regex(match.group('out')),
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})
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@staticmethod
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def field_to_template(tmpl):
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if re.match(r'\w+$', tmpl):
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return '%%(%s)s' % tmpl
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return tmpl
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@staticmethod
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def format_to_regex(fmt):
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r"""
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Converts a string like
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'%(title)s - %(artist)s'
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to a regex like
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'(?P<title>.+)\ \-\ (?P<artist>.+)'
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"""
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if not re.search(r'%\(\w+\)s', fmt):
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return fmt
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lastpos = 0
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regex = ''
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# replace %(..)s with regex group and escape other string parts
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for match in re.finditer(r'%\((\w+)\)s', fmt):
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regex += re.escape(fmt[lastpos:match.start()])
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regex += r'(?P<%s>[^\r\n]+)' % match.group(1)
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lastpos = match.end()
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if lastpos < len(fmt):
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regex += re.escape(fmt[lastpos:])
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return regex
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def run(self, info):
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for dictn in self._data:
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tmpl, info_copy = self._downloader.prepare_outtmpl(dictn['tmpl'], info)
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data_to_parse = tmpl % info_copy
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self.write_debug('Searching for r"%s" in %s' % (dictn['regex'], tmpl))
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match = re.search(dictn['regex'], data_to_parse)
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if match is None:
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self.report_warning('Could not interpret video %s as "%s"' % (dictn['in'], dictn['out']))
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continue
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for attribute, value in match.groupdict().items():
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info[attribute] = value
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self.to_screen('parsed %s from "%s": %s' % (attribute, dictn['in'], value if value is not None else 'NA'))
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return [], info
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class MetadataFromTitlePP(MetadataFromFieldPP): # for backward compatibility
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def __init__(self, downloader, titleformat):
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super(MetadataFromTitlePP, self).__init__(downloader, ['title:%s' % titleformat])
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self._titleformat = titleformat
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self._titleregex = self._data[0]['regex']
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