mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-15 09:25:04 +00:00
142 lines
4.4 KiB
Python
142 lines
4.4 KiB
Python
"""
|
|
Parser list managment:
|
|
- createParser() find the best parser for a file.
|
|
"""
|
|
|
|
import os
|
|
from hachoir.core.error import warning, info
|
|
from hachoir.parser import ValidateError, HachoirParserList
|
|
from hachoir.stream import FileInputStream
|
|
import weakref
|
|
|
|
|
|
class QueryParser(object):
|
|
fallback = None
|
|
other = None
|
|
|
|
def __init__(self, tags):
|
|
self.validate = True
|
|
self.use_fallback = False
|
|
self.parser_args = None
|
|
self.db = HachoirParserList.getInstance()
|
|
self.parsers = set(self.db)
|
|
parsers = []
|
|
for tag in tags:
|
|
if not self.parsers:
|
|
break
|
|
parsers += self._getByTag(tag)
|
|
if self.fallback is None:
|
|
self.fallback = len(parsers) == 1
|
|
if self.parsers:
|
|
other = len(parsers)
|
|
parsers += list(self.parsers)
|
|
self.other = parsers[other]
|
|
self.parsers = parsers
|
|
|
|
def __iter__(self):
|
|
return iter(self.parsers)
|
|
|
|
def translate(self, name, value):
|
|
if name == "filename":
|
|
filename = os.path.basename(value).split(".")
|
|
if len(filename) <= 1:
|
|
value = ""
|
|
else:
|
|
value = filename[-1].lower()
|
|
name = "file_ext"
|
|
return name, value
|
|
|
|
def _getByTag(self, tag):
|
|
if tag is None:
|
|
self.parsers.clear()
|
|
return []
|
|
elif callable(tag):
|
|
parsers = [parser for parser in self.parsers if tag(parser)]
|
|
for parser in parsers:
|
|
self.parsers.remove(parser)
|
|
elif tag[0] == "class":
|
|
self.validate = False
|
|
return [tag[1]]
|
|
elif tag[0] == "args":
|
|
self.parser_args = tag[1]
|
|
return []
|
|
else:
|
|
tag = self.translate(*tag)
|
|
parsers = []
|
|
if tag is not None:
|
|
key = tag[0]
|
|
byname = self.db.bytag.get(key, {})
|
|
if tag[1] is None:
|
|
values = iter(byname.values())
|
|
else:
|
|
values = byname.get(tag[1], ()),
|
|
if key == "id" and values:
|
|
self.validate = False
|
|
for value in values:
|
|
for parser in value:
|
|
if parser in self.parsers:
|
|
parsers.append(parser)
|
|
self.parsers.remove(parser)
|
|
return parsers
|
|
|
|
def parse(self, stream, fallback=True):
|
|
if hasattr(stream, "_cached_parser"):
|
|
parser = stream._cached_parser()
|
|
else:
|
|
parser = None
|
|
if parser is not None:
|
|
if parser.__class__ in self.parsers:
|
|
return parser
|
|
parser = self.doparse(stream, fallback)
|
|
if parser is not None:
|
|
stream._cached_parser = weakref.ref(parser)
|
|
else:
|
|
try:
|
|
stream._input.close()
|
|
except:
|
|
pass
|
|
return parser
|
|
|
|
def doparse(self, stream, fallback=True):
|
|
fb = None
|
|
warn = warning
|
|
for parser in self.parsers:
|
|
try:
|
|
parser_obj = parser(stream, validate=self.validate)
|
|
if self.parser_args:
|
|
for key, value in self.parser_args.items():
|
|
setattr(parser_obj, key, value)
|
|
return parser_obj
|
|
except ValidateError as err:
|
|
if fallback and self.fallback:
|
|
fb = parser
|
|
if parser == self.other:
|
|
warn = info
|
|
warn("Skip parser '%s': %s" % (parser.__name__, err))
|
|
except Exception as err:
|
|
if parser == self.other:
|
|
warn = info
|
|
warn("Skip parser '%s': %s" % (parser.__name__, err))
|
|
fallback = False
|
|
if self.use_fallback and fb:
|
|
warning("Force use of parser '%s'" % fb.__name__)
|
|
return fb(stream)
|
|
|
|
|
|
def guessParser(stream):
|
|
return QueryParser(stream.tags).parse(stream)
|
|
|
|
|
|
def createParser(filename, real_filename=None, tags=None):
|
|
"""
|
|
Create a parser from a file or returns None on error.
|
|
|
|
Options:
|
|
- file (str|io.IOBase): Input file name or
|
|
a byte io.IOBase stream ;
|
|
- real_filename (str): Real file name.
|
|
"""
|
|
if not tags:
|
|
tags = []
|
|
stream = FileInputStream(filename, real_filename, tags=tags)
|
|
return guessParser(stream)
|