109 lines
3.7 KiB
Python
109 lines
3.7 KiB
Python
import traceback
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class Event(object):
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def __init__(self, bot, name, **kwargs):
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self.bot = bot
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self.name = name
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self.kwargs = kwargs
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self.eaten = False
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def __getitem__(self, key):
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return self.kwargs[key]
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def get(self, key, default=None):
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return self.kwargs.get(key, default)
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def __contains__(self, key):
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return key in self.kwargs
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def eat(self):
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self.eaten = True
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class EventCallback(object):
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def __init__(self, function, bot, **kwargs):
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self.function = function
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self.bot = bot
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self.kwargs = kwargs
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def call(self, event):
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return self.function(event)
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class MultipleEventHook(object):
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def __init__(self):
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self._event_hooks = set([])
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def _add(self, event_hook):
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self._event_hooks.add(event_hook)
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def hook(self, function, **kwargs):
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for event_hook in self._event_hooks:
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event_hook.hook(function, **kwargs)
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def call(self, max=None, **kwargs):
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for event_hook in self._event_hooks:
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event_hook.call(max, **kwargs)
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class EventHook(object):
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def __init__(self, bot, name=None):
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self.bot = bot
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self.name = name
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self._children = {}
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self._hooks = []
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self._hook_notify = None
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self._child_notify = None
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self._call_notify = None
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self._stored_events = []
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def hook(self, function, replay=False, **kwargs):
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callback = EventCallback(function, self.bot, **kwargs)
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if self._hook_notify:
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self._hook_notify(self, callback)
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self._hooks.append(callback)
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if replay:
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for event in self._stored_events:
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callback.call(event)
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self._stored_events = None
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def _unhook(self, hook):
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self._hooks.remove(hook)
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def on(self, subevent, *extra_subevents):
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if extra_subevents:
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multiple_event_hook = MultipleEventHook()
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for extra_subevent in (subevent,)+extra_subevents:
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multiple_event_hook._add(self.get_child(extra_subevent))
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return multiple_event_hook
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return self.get_child(subevent)
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def call(self, max=None, **kwargs):
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event = Event(self.bot, self.name, **kwargs)
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if self._call_notify:
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self._call_notify(self, event)
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if not self._stored_events == None:
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self._stored_events.append(event)
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called = 0
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returns = []
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for hook in self._hooks:
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if max and called == max:
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break
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if event.eaten:
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break
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try:
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returns.append(hook.call(event))
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except Exception as e:
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traceback.print_exc()
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# TODO don't make this an event call. can lead to error cycles!
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#self.bot.events.on("log").on("error").call(
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# message="Failed to call event callback",
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# data=traceback.format_exc())
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called += 1
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return returns
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def get_child(self, child_name):
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child_name_lower = child_name.lower()
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if not child_name_lower in self._children:
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self._children[child_name_lower] = EventHook(self.bot,
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child_name)
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if self._child_notify:
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self._child_notify(self, self._children[
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child_name_lower])
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return self._children[child_name_lower]
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def get_hooks(self):
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return self._hooks
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def get_children(self):
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return self._children.keys()
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def set_hook_notify(self, handler):
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self._hook_notify = handler
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def set_child_notify(self, handler):
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self._child_notify = handler
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def set_call_notify(self, handler):
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self._call_notify = handler
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