192 lines
6.6 KiB
Python
192 lines
6.6 KiB
Python
# -*- coding: utf-8 -*-
|
|
import os
|
|
import abc
|
|
import media.monitor.pure as mmp
|
|
from media.monitor.pure import LazyProperty
|
|
from media.monitor.metadata import Metadata
|
|
from media.monitor.log import Loggable
|
|
from media.monitor.exceptions import BadSongFile
|
|
|
|
class PathChannel(object):
|
|
def __init__(self, signal, path):
|
|
self.signal = signal
|
|
self.path = path
|
|
|
|
class EventRegistry(object):
|
|
"""
|
|
This class's main use is to keep track all events with a cookie attribute.
|
|
This is done mainly because some events must be 'morphed' into other events
|
|
because we later detect that they are move events instead of delete events.
|
|
"""
|
|
registry = {}
|
|
@staticmethod
|
|
def register(evt): EventRegistry.registry[evt.cookie] = evt
|
|
@staticmethod
|
|
def unregister(evt): del EventRegistry.registry[evt.cookie]
|
|
@staticmethod
|
|
def registered(evt): return evt.cookie in EventRegistry.registry
|
|
@staticmethod
|
|
def matching(evt):
|
|
event = EventRegistry.registry[evt.cookie]
|
|
# Want to disallow accessing the same event twice
|
|
EventRegistry.unregister(event)
|
|
return event
|
|
def __init__(self,*args,**kwargs):
|
|
raise Exception("You can instantiate this class. Must only use class \
|
|
methods")
|
|
|
|
class HasMetaData(object):
|
|
"""
|
|
Any class that inherits from this class gains the metadata attribute that
|
|
loads metadata from the class's 'path' attribute. This is done lazily so
|
|
there is no performance penalty to inheriting from this and subsequent
|
|
calls to metadata are cached
|
|
"""
|
|
__metaclass__ = abc.ABCMeta
|
|
@LazyProperty
|
|
def metadata(self): return Metadata(self.path)
|
|
|
|
class BaseEvent(Loggable):
|
|
__metaclass__ = abc.ABCMeta
|
|
def __init__(self, raw_event):
|
|
# TODO : clean up this idiotic hack
|
|
# we should use keyword constructors instead of this behaviour checking
|
|
# bs to initialize BaseEvent
|
|
if hasattr(raw_event,"pathname"):
|
|
self._raw_event = raw_event
|
|
self.path = os.path.normpath(raw_event.pathname)
|
|
else: self.path = raw_event
|
|
self._pack_hook = lambda: None # no op
|
|
# into another event
|
|
|
|
def reset_hook(self):
|
|
self._pack_hook()
|
|
self._pack_hook = lambda: None
|
|
|
|
def exists(self): return os.path.exists(self.path)
|
|
|
|
@LazyProperty
|
|
def cookie(self): return getattr( self._raw_event, 'cookie', None )
|
|
|
|
def __str__(self):
|
|
return "Event(%s). Path(%s)" % ( self.path, self.__class__.__name__)
|
|
|
|
def add_safe_pack_hook(self,k):
|
|
"""
|
|
adds a callable object (function) that will be called after the event
|
|
has been "safe_packed"
|
|
"""
|
|
self._pack_hook = k
|
|
|
|
# As opposed to unsafe_pack...
|
|
def safe_pack(self):
|
|
"""
|
|
returns exceptions instead of throwing them to be consistent with
|
|
events that must catch their own BadSongFile exceptions since generate
|
|
a set of exceptions instead of a single one
|
|
"""
|
|
# pack will only throw an exception if it processes one file but this
|
|
# is a little bit hacky
|
|
try:
|
|
self._pack_hook()
|
|
ret = self.pack()
|
|
return ret
|
|
except BadSongFile as e: return [e]
|
|
|
|
# nothing to see here, please move along
|
|
def morph_into(self, evt):
|
|
self.logger.info("Morphing %s into %s" % ( str(self), str(evt) ) )
|
|
self._raw_event = evt
|
|
self.path = evt.path
|
|
self.__class__ = evt.__class__
|
|
# We don't transfer the _pack_hook over to the new event
|
|
return self
|
|
|
|
class FakePyinotify(object):
|
|
"""
|
|
sometimes we must create our own pyinotify like objects to
|
|
instantiate objects from the classes below whenever we want to turn
|
|
a single event into multiple events
|
|
"""
|
|
def __init__(self, path): self.pathname = path
|
|
|
|
class OrganizeFile(BaseEvent, HasMetaData):
|
|
def __init__(self, *args, **kwargs):
|
|
super(OrganizeFile, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
raise AttributeError("You can't send organize events to airtime!!!")
|
|
|
|
class NewFile(BaseEvent, HasMetaData):
|
|
def __init__(self, *args, **kwargs):
|
|
super(NewFile, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
"""
|
|
packs turns an event into a media monitor request
|
|
"""
|
|
req_dict = self.metadata.extract()
|
|
req_dict['mode'] = u'create'
|
|
req_dict['MDATA_KEY_FILEPATH'] = unicode( self.path )
|
|
return [req_dict]
|
|
|
|
class DeleteFile(BaseEvent):
|
|
def __init__(self, *args, **kwargs):
|
|
super(DeleteFile, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
req_dict = {}
|
|
req_dict['mode'] = u'delete'
|
|
req_dict['MDATA_KEY_FILEPATH'] = unicode( self.path )
|
|
return [req_dict]
|
|
|
|
class MoveFile(BaseEvent, HasMetaData):
|
|
"""
|
|
Path argument should be the new path of the file that was moved
|
|
"""
|
|
def __init__(self, *args, **kwargs):
|
|
super(MoveFile, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
req_dict = {}
|
|
req_dict['mode'] = u'moved'
|
|
req_dict['MDATA_KEY_MD5'] = self.metadata.extract()['MDATA_KEY_MD5']
|
|
req_dict['MDATA_KEY_FILEPATH'] = unicode( self.path )
|
|
return [req_dict]
|
|
|
|
class ModifyFile(BaseEvent, HasMetaData):
|
|
def __init__(self, *args, **kwargs):
|
|
super(ModifyFile, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
req_dict = self.metadata.extract()
|
|
req_dict['mode'] = u'modify'
|
|
# path to directory that is to be removed
|
|
req_dict['MDATA_KEY_FILEPATH'] = unicode( self.path )
|
|
return [req_dict]
|
|
|
|
def map_events(directory, constructor):
|
|
# -unknown-path should not appear in the path here but more testing
|
|
# might be necessary
|
|
for f in mmp.walk_supported(directory, clean_empties=False):
|
|
try:
|
|
for e in constructor( FakePyinotify(f) ).pack(): yield e
|
|
except BadSongFile as e: yield e
|
|
|
|
class DeleteDir(BaseEvent):
|
|
def __init__(self, *args, **kwargs):
|
|
super(DeleteDir, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
return map_events( self.path, DeleteFile )
|
|
|
|
class MoveDir(BaseEvent):
|
|
def __init__(self, *args, **kwargs):
|
|
super(MoveDir, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
return map_events( self.path, MoveFile )
|
|
|
|
class DeleteDirWatch(BaseEvent):
|
|
def __init__(self, *args, **kwargs):
|
|
super(DeleteDirWatch, self).__init__(*args, **kwargs)
|
|
def pack(self):
|
|
req_dict = {}
|
|
req_dict['mode'] = u'delete_dir'
|
|
req_dict['MDATA_KEY_FILEPATH'] = unicode( self.path + "/" )
|
|
return [req_dict]
|
|
|