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bazarr/libs/guessit/rules/common/quantity.py

106 lines
2.2 KiB

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Quantities: Size
"""
from abc import abstractmethod
from rebulk.remodule import re
from ..common import seps
class Quantity(object):
"""
Represent a quantity object with magnitude and units.
"""
parser_re = re.compile(r'(?P<magnitude>\d+(?:[.]\d+)?)(?P<units>[^\d]+)?')
def __init__(self, magnitude, units):
self.magnitude = magnitude
self.units = units
@classmethod
@abstractmethod
def parse_units(cls, value):
"""
Parse a string to a proper unit notation.
"""
raise NotImplementedError
@classmethod
def fromstring(cls, string):
"""
Parse the string into a quantity object.
:param string:
:return:
"""
values = cls.parser_re.match(string).groupdict()
try:
magnitude = int(values['magnitude'])
except ValueError:
magnitude = float(values['magnitude'])
units = cls.parse_units(values['units'])
return cls(magnitude, units)
def __hash__(self):
return hash(str(self))
def __eq__(self, other):
if isinstance(other, str):
return str(self) == other
if not isinstance(other, self.__class__):
return NotImplemented
return self.magnitude == other.magnitude and self.units == other.units
def __ne__(self, other):
return not self == other
def __repr__(self):
return '<{0} [{1}]>'.format(self.__class__.__name__, self)
def __str__(self):
return '{0}{1}'.format(self.magnitude, self.units)
class Size(Quantity):
"""
Represent size.
e.g.: 1.1GB, 300MB
"""
@classmethod
def parse_units(cls, value):
return value.strip(seps).upper()
class BitRate(Quantity):
"""
Represent bit rate.
e.g.: 320Kbps, 1.5Mbps
"""
@classmethod
def parse_units(cls, value):
value = value.strip(seps).capitalize()
for token in ('bits', 'bit'):
value = value.replace(token, 'bps')
return value
class FrameRate(Quantity):
"""
Represent frame rate.
e.g.: 24fps, 60fps
"""
@classmethod
def parse_units(cls, value):
return 'fps'