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import logging |
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log = logging.getLogger(__name__) |
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IGNORED_EVENTS = [ |
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'buffering' |
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] |
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class Engine(object): |
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handlers = {} |
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def __init__(self): |
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self.handlers = self._construct_handlers(self.handlers) |
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def process(self, obj, events): |
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for key, payload in events: |
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result = self.process_one(obj, key, payload) |
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if not result: |
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continue |
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for item in result: |
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yield item |
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def process_one(self, obj, key, payload): |
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# Ensure the event hasn't been ignored |
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if key in IGNORED_EVENTS: |
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log.debug('Ignored %r event', key) |
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return |
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# Try find handler for event |
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handlers = self.handlers.get(key) |
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if not handlers: |
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raise Exception('No handlers found for %r event' % key) |
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# Run handlers until we get a result |
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result = None |
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for h in handlers: |
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if not h.is_valid_source(obj.state): |
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log.info('Ignoring %r event for %r, invalid state transition', key, obj) |
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continue |
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result = h.process(obj, payload) |
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break |
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if result is None: |
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return |
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for item in result: |
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if not item: |
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continue |
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state, data = item |
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# Update current state/data |
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self._set_attributes(obj, **data) |
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if state is None: |
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continue |
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# New event |
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obj.state = state |
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# Save |
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obj.save() |
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yield state, data |
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@staticmethod |
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def find_handlers(handlers, func): |
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result = [] |
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for h in handlers: |
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if not func(h): |
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continue |
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result.append(h) |
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return result |
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84
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@classmethod |
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def register(cls, kls): |
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key = kls.__event__ |
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if not key: |
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raise Exception('Unable to register %r, missing "__key__" attribute' % kls) |
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if key not in cls.handlers: |
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cls.handlers[key] = [] |
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cls.handlers[key].append(kls) |
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96
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@staticmethod |
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def _construct_handlers(handlers): |
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result = {} |
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100
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for key, classes in handlers.items(): |
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objects = [] |
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102
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103
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for kls in classes: |
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objects.append(kls()) |
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106
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result[key] = objects |
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return result |
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110
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@staticmethod |
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111
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def _set_attributes(obj, **kwargs): |
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for key, value in kwargs.items(): |
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if not hasattr(obj, key): |
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raise Exception('Object %r is missing the attribute %r' % (obj, key)) |
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115
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116
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setattr(obj, key, value) |
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118
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119
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1 |
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class SessionEngine(Engine): |
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120
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handlers = {} |
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121
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fuzeman /
Plex-Trakt-Scrobbler
