68 lines
2.6 KiB
Python
68 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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import os
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import mutagen
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import abc
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from media.monitor.exceptions import BadSongFile
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class PathChannel(object):
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"""a dumb struct; python has no record types"""
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def __init__(self, signal, path):
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self.signal = signal
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self.path = path
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# It would be good if we could parameterize this class by the attribute
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# that would contain the path to obtain the meta data. But it would be too much
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# work for little reward
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class HasMetaData(object):
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# TODO : add documentation for HasMetaData
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__metaclass__ = abc.ABCMeta
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# doing weird bullshit here because python constructors only
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# call the constructor of the leftmost superclass.
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@property
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def metadata(self):
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# Normally this would go in init but we don't like
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# relying on consumers of this behaviour to have to call
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# the constructor
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if not hasattr(self,"_loaded"): self._loaded = False
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if self._loaded: return self._metadata
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else:
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f = None
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try: f = mutagen.File(self.path, easy=True)
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except Exception: raise BadSongFile(self.path)
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# value returned by mutagen only acts like a dictionary.
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# in fact it comes with a nice surprise for you if you try
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# to add elements to it
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self._metadata = {}
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for k,v in f:
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if isinstance(v, list):
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if len(v) == 1:
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self._metadata[k] = v[0]
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else:
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raise Exception("Weird mutagen %s:%s" % (k,str(v)))
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else:
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self._metadata[k] = v
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self._loaded = True
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return self.metadata
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class BaseEvent(object):
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__metaclass__ = abc.ABCMeta
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def __init__(self, raw_event):
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# TODO : clean up this idiotic hack
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# we should use keyword constructors instead of this behaviour checking
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# bs to initialize BaseEvent
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if getattr(raw_event,"pathname"):
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self.__raw_event = raw_event
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self.path = os.path.normpath(raw_event.pathname)
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else: self.path = raw_event
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def exists(self): return os.path.exists(self.path)
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def __str__(self):
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return "Event. Path: %s" % self.__raw_event.pathname
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class OrganizeFile(BaseEvent, HasMetaData):
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def __init__(self, *args, **kwargs): super(OrganizeFile, self).__init__(*args, **kwargs)
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class NewFile(BaseEvent, HasMetaData):
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def __init__(self, *args, **kwargs): super(NewFile, self).__init__(*args, **kwargs)
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class DeleteFile(BaseEvent):
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def __init__(self, *args, **kwargs): super(DeleteFile, self).__init__(*args, **kwargs)
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