mirror of
https://github.com/yt-dlp/yt-dlp
synced 2024-12-30 22:24:28 +01:00
117 lines
4.1 KiB
Python
117 lines
4.1 KiB
Python
import re
|
|
|
|
from enum import Enum
|
|
|
|
from .common import PostProcessor
|
|
|
|
|
|
class MetadataParserPP(PostProcessor):
|
|
class Actions(Enum):
|
|
INTERPRET = 'interpretter'
|
|
REPLACE = 'replacer'
|
|
|
|
def __init__(self, downloader, actions):
|
|
PostProcessor.__init__(self, downloader)
|
|
self._actions = []
|
|
for f in actions:
|
|
action = f[0]
|
|
assert isinstance(action, self.Actions)
|
|
self._actions.append(getattr(self, action._value_)(*f[1:]))
|
|
|
|
@classmethod
|
|
def validate_action(cls, action, *data):
|
|
''' Each action can be:
|
|
(Actions.INTERPRET, from, to) OR
|
|
(Actions.REPLACE, field, search, replace)
|
|
'''
|
|
if not isinstance(action, cls.Actions):
|
|
raise ValueError(f'{action!r} is not a valid action')
|
|
getattr(cls, action._value_)(cls, *data)
|
|
|
|
@staticmethod
|
|
def field_to_template(tmpl):
|
|
if re.match(r'[a-zA-Z_]+$', tmpl):
|
|
return f'%({tmpl})s'
|
|
return tmpl
|
|
|
|
@staticmethod
|
|
def format_to_regex(fmt):
|
|
r"""
|
|
Converts a string like
|
|
'%(title)s - %(artist)s'
|
|
to a regex like
|
|
'(?P<title>.+)\ \-\ (?P<artist>.+)'
|
|
"""
|
|
if not re.search(r'%\(\w+\)s', fmt):
|
|
return fmt
|
|
lastpos = 0
|
|
regex = ''
|
|
# 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 += rf'(?P<{match.group(1)}>.+)'
|
|
lastpos = match.end()
|
|
if lastpos < len(fmt):
|
|
regex += re.escape(fmt[lastpos:])
|
|
return regex
|
|
|
|
def run(self, info):
|
|
for f in self._actions:
|
|
f(info)
|
|
return [], info
|
|
|
|
def interpretter(self, inp, out):
|
|
def f(info):
|
|
outtmpl, tmpl_dict = self._downloader.prepare_outtmpl(template, info)
|
|
data_to_parse = self._downloader.escape_outtmpl(outtmpl) % tmpl_dict
|
|
self.write_debug(f'Searching for {out_re.pattern!r} in {template!r}')
|
|
match = out_re.search(data_to_parse)
|
|
if match is None:
|
|
self.report_warning(f'Could not interpret {inp!r} as {out!r}')
|
|
return
|
|
for attribute, value in match.groupdict().items():
|
|
info[attribute] = value
|
|
self.to_screen('Parsed %s from %r: %r' % (attribute, template, value if value is not None else 'NA'))
|
|
|
|
template = self.field_to_template(inp)
|
|
out_re = re.compile(self.format_to_regex(out))
|
|
return f
|
|
|
|
def replacer(self, field, search, replace):
|
|
def f(info):
|
|
val = info.get(field)
|
|
if val is None:
|
|
self.report_warning(f'Video does not have a {field}')
|
|
return
|
|
elif not isinstance(val, str):
|
|
self.report_warning(f'Cannot replace in field {field} since it is a {type(val).__name__}')
|
|
return
|
|
self.write_debug(f'Replacing all {search!r} in {field} with {replace!r}')
|
|
info[field], n = search_re.subn(replace, val)
|
|
if n:
|
|
self.to_screen(f'Changed {field} to: {info[field]}')
|
|
else:
|
|
self.to_screen(f'Did not find {search!r} in {field}')
|
|
|
|
search_re = re.compile(search)
|
|
return f
|
|
|
|
|
|
class MetadataFromFieldPP(MetadataParserPP):
|
|
@classmethod
|
|
def to_action(cls, f):
|
|
match = re.match(r'(?P<in>.*?)(?<!\\):(?P<out>.+)$', f)
|
|
if match is None:
|
|
raise ValueError(f'it should be FROM:TO, not {f!r}')
|
|
return (
|
|
cls.Actions.INTERPRET,
|
|
match.group('in').replace('\\:', ':'),
|
|
match.group('out'))
|
|
|
|
def __init__(self, downloader, formats):
|
|
MetadataParserPP.__init__(self, downloader, [self.to_action(f) for f in formats])
|
|
|
|
|
|
class MetadataFromTitlePP(MetadataParserPP): # for backward compatibility
|
|
def __init__(self, downloader, titleformat):
|
|
MetadataParserPP.__init__(self, downloader, [(self.Actions.INTERPRET, 'title', titleformat)])
|