X-Git-Url: https://git.kaliko.me/?a=blobdiff_plain;f=sima%2Flib%2Fmeta.py;h=f118e82dcfd19c7dce1b3d426ff2c6dd0c08485c;hb=37dd60538984a3917354b794a5c96b0a025f8e95;hp=2d78f2f67269cfedfb2898a2aa3f3e1e025bc21d;hpb=70bf86ca3f65a550436cdc70326cb8601f24e5a6;p=mpd-sima.git diff --git a/sima/lib/meta.py b/sima/lib/meta.py index 2d78f2f..f118e82 100644 --- a/sima/lib/meta.py +++ b/sima/lib/meta.py @@ -1,5 +1,5 @@ # -*- coding: utf-8 -*- -# Copyright (c) 2013, 2014 Jack Kaliko +# Copyright (c) 2013, 2014, 2015, 2021 kaliko # # This file is part of sima # @@ -21,22 +21,32 @@ Defines some object to handle audio file metadata """ + +from collections.abc import Set +import logging import re -UUID_RE = r'^[a-f0-9]{8}-[a-f0-9]{4}-4[a-f0-9]{3}-[89aAbB][a-f0-9]{3}-[a-f0-9]{12}$' +UUID_RE = r'^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[89AB][a-f0-9]{3}-[a-f0-9]{12}$' +#: The Track Object is collapsing multiple tags into a single string using this +# separator. It is used then to split back the string to tags list. +SEPARATOR = chr(0x1F) # ASCII Unit Separator + def is_uuid4(uuid): + """Controls MusicBrainz UUID4 format + + :param str uuid: String representing the UUID + :returns: boolean + """ regexp = re.compile(UUID_RE, re.IGNORECASE) if regexp.match(uuid): return True - raise WrongUUID4(uuid) + return False + class MetaException(Exception): """Generic Meta Exception""" - pass -class WrongUUID4(MetaException): - pass def mbidfilter(func): def wrapper(*args, **kwargs): @@ -49,24 +59,50 @@ def mbidfilter(func): return wrapper +def serialize(func): + def wrapper(*args, **kwargs): + ans = func(*args, **kwargs) + if isinstance(ans, set): + return {s.replace("'", r"\'").replace('"', r'\"') for s in ans} + return ans.replace("'", r"\'").replace('"', r'\"') + return wrapper + + class Meta: - """Generic Class for Meta object - Meta(name=[, mbid=UUID4]) + """ + A generic Class to handle tracks metadata such as artist, album, albumartist + names and their associated MusicBrainz's ID. + + + Using generic kwargs in constructor for convenience but the actual signature is: + + >>> Meta(name, mbid=None, **kwargs) + + :param str name: set name attribute + :param str mbid: set MusicBrainz ID """ use_mbid = True + """Class attribute to disable use of MusicBrainz IDs""" def __init__(self, **kwargs): - self.__name = None #TODO: should be immutable + """Meta(name=[, mbid=UUID4])""" + self.__name = None # TODO: should be immutable self.__mbid = None self.__aliases = set() + self.log = logging.getLogger(__name__) if 'name' not in kwargs or not kwargs.get('name'): - raise MetaException('Need a "name" argument') + raise MetaException('Need a "name" argument (str type)') + if not isinstance(kwargs.get('name'), str): + raise MetaException('"name" argument not a string') else: - self.__name = kwargs.pop('name') + self.__name = kwargs.pop('name').split(SEPARATOR)[0] if 'mbid' in kwargs and kwargs.get('mbid'): - is_uuid4(kwargs.get('mbid')) + mbid = kwargs.get('mbid').lower().split(SEPARATOR)[0] + if is_uuid4(mbid): + self.__mbid = mbid + else: + self.log.warning('Wrong mbid %s:%s', self.__name, mbid) # mbid immutable as hash rests on - self.__mbid = kwargs.pop('mbid') self.__dict__.update(**kwargs) def __repr__(self): @@ -82,11 +118,12 @@ class Meta: """ #if hasattr(other, 'mbid'): # better isinstance? if isinstance(other, Meta) and self.mbid and other.mbid: - if self.mbid and other.mbid: - return self.mbid == other.mbid - else: - return (other.__str__() == self.__str__() or - other.__str__() in self.__aliases) + return self.mbid == other.mbid + if isinstance(other, Meta): + return bool(self.names & other.names) + if getattr(other, '__str__', None): + # is other.__str__() in self.__name or self.__aliases + return other.__str__() in self.names return False def __hash__(self): @@ -95,11 +132,18 @@ class Meta: return hash(self.__name) def add_alias(self, other): + """Add alternative name to `aliases` attibute. + + `other` can be a :class:`sima.lib.meta.Meta` object in which case aliases are merged. + + :param str other: Alias to add, could be any object with ``__str__`` method. + """ + if isinstance(other, Meta): + self.__aliases |= other.__aliases + self.__aliases -= {self.name} if getattr(other, '__str__', None): - if callable(other.__str__): + if callable(other.__str__) and other.__str__() != self.name: self.__aliases |= {other.__str__()} - elif isinstance(other, Meta): - self.__aliases |= other.__aliases else: raise MetaException('No __str__ method found in {!r}'.format(other)) @@ -107,6 +151,11 @@ class Meta: def name(self): return self.__name + @property + @serialize + def name_sz(self): + return self.name + @property def mbid(self): return self.__mbid @@ -115,40 +164,90 @@ class Meta: def aliases(self): return self.__aliases + @property + @serialize + def aliases_sz(self): + return self.aliases + @property def names(self): - return self.__aliases | {self.__name,} + """aliases + name""" + return self.__aliases | {self.__name, } + + @property + @serialize + def names_sz(self): + return self.names class Album(Meta): + """Album object""" + + @mbidfilter + def __init__(self, name=None, mbid=None, **kwargs): + if kwargs.get('musicbrainz_albumid', False): + mbid = kwargs.get('musicbrainz_albumid') + super().__init__(name=name, mbid=mbid, **kwargs) @property def album(self): return self.name + class Artist(Meta): + """Artist object deriving from :class:`Meta`. + + :param str name: Artist name + :param str mbid: Musicbrainz artist ID + :param str artist: Overrides "name" argument + :param str albumartist: use "name" if not set + :param str musicbrainz_artistid: Overrides "mbid" argument + + :Example: + + >>> trk = {'artist':'Art Name', + >>> 'albumartist': 'Alb Art Name', # optional + >>> 'musicbrainz_artistid': '', # optional + >>> } + >>> artobj0 = Artist(**trk) + >>> artobj1 = Artist(name='Tool') + """ @mbidfilter def __init__(self, name=None, mbid=None, **kwargs): - """Artist object built from a mapping dict containing at least an - "artist" entry: - >>> trk = {'artist':'Art Name', - >>> 'albumartist': 'Alb Art Name', # optional - >>> 'musicbrainz_artistid': '' , # optional - >>> 'musicbrainz_albumartistid': '', # optional - >>> } - >>> artobj0 = Artist(**trk) - >>> artobj1 = Artist(name='Tool') - """ - name = kwargs.get('artist', name) - mbid = kwargs.get('musicbrainz_artistid', mbid) - if (kwargs.get('albumartist', False) and - kwargs.get('albumartist') != 'Various Artists'): - name = kwargs.get('albumartist').split(', ')[0] - if (kwargs.get('musicbrainz_albumartistid', False) and - kwargs.get('musicbrainz_albumartistid') != '89ad4ac3-39f7-470e-963a-56509c546377'): - mbid = kwargs.get('musicbrainz_albumartistid').split(', ')[0] - super().__init__(name=name, mbid=mbid) + if kwargs.get('artist', False): + name = kwargs.get('artist') + if kwargs.get('musicbrainz_artistid', False): + mbid = kwargs.get('musicbrainz_artistid') + if name and not kwargs.get('albumartist', False): + kwargs['albumartist'] = name.split(SEPARATOR)[0] + super().__init__(name=name, mbid=mbid, + albumartist=kwargs.get('albumartist')) + + +class MetaContainer(Set): + + def __init__(self, iterable): + self.elements = lst = [] + for value in iterable: + if value not in lst: + lst.append(value) + else: + for inlst in lst: + if value == inlst: + inlst.add_alias(value) + + def __iter__(self): + return iter(self.elements) + + def __contains__(self, value): + return value in self.elements + + def __len__(self): + return len(self.elements) + + def __repr__(self): + return repr(self.elements) # VIM MODLINE # vim: ai ts=4 sw=4 sts=4 expandtab