Remove a, now useless, conditional import.

[mpd-sima.git] / sima / lib / meta.py

diff --git a/sima/lib/meta.py b/sima/lib/meta.py
index 2877b2fa833f7239d392c8cee9c110119360412d..26da9ca66efc05918a9c45b87a8de39ea08a345b 100644 (file)
--- a/sima/lib/meta.py
+++ b/sima/lib/meta.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2013, 2014, 2015 Jack Kaliko <kaliko@azylum.org>
+# Copyright (c) 2013, 2014, 2015, 2021 kaliko <kaliko@azylum.org>
 #
 #  This file is part of sima
 #
@@ -21,10 +21,8 @@
 Defines some object to handle audio file metadata
 """
 
-try:
-    from collections.abc import Set # python >= 3.3
-except ImportError:
-    from collections import Set # python 3.2
+
+from collections.abc import Set
 import logging
 import re
 
@@ -46,7 +44,7 @@ def is_uuid4(uuid):
 
 class MetaException(Exception):
     """Generic Meta Exception"""
-    pass
+
 
 def mbidfilter(func):
     def wrapper(*args, **kwargs):
@@ -58,6 +56,14 @@ def mbidfilter(func):
         func(*args, **kwargs)
     return wrapper
 
+def serialize(func):
+    def wrapper(*args, **kwargs):
+        ans = func(*args, **kwargs)
+        if isinstance(ans, set):
+            return {s.replace("'", r"\'") for s in ans}
+        return ans.replace("'", r"\'")
+    return wrapper
+
 
 class Meta:
     """
@@ -77,13 +83,13 @@ class Meta:
 
     def __init__(self, **kwargs):
         """Meta(name=<str>[, mbid=UUID4])"""
-        self.__name = None #TODO: should be immutable
+        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 (str type)')
-        elif not isinstance(kwargs.get('name'), str):
+        if not isinstance(kwargs.get('name'), str):
             raise MetaException('"name" argument not a string')
         else:
             self.__name = kwargs.pop('name')
@@ -110,9 +116,9 @@ class Meta:
         #if hasattr(other, 'mbid'):  # better isinstance?
         if isinstance(other, Meta) and self.mbid and other.mbid:
             return self.mbid == other.mbid
-        elif isinstance(other, Meta):
+        if isinstance(other, Meta):
             return bool(self.names & other.names)
-        elif getattr(other, '__str__', None):
+        if getattr(other, '__str__', None):
             # is other.__str__() in self.__name or self.__aliases
             return other.__str__() in self.names
         return False
@@ -142,6 +148,11 @@ class Meta:
     def name(self):
         return self.__name
 
+    @property
+    @serialize
+    def name_sz(self):
+        return self.name
+
     @property
     def mbid(self):
         return self.__mbid
@@ -150,19 +161,34 @@ class Meta:
     def aliases(self):
         return self.__aliases
 
+    @property
+    @serialize
+    def aliases_sz(self):
+        return self.aliases
+
     @property
     def names(self):
         """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):
+        super().__init__(name=name, mbid=mbid, **kwargs)
+
     @property
     def album(self):
         return self.name
 
+
 class Artist(Meta):
     """Artist object deriving from :class:`Meta`.