# Path: cardinal/exceptions.py
# class CommandNotFoundError(CardinalException):
#     """Raised when a given command isn't loaded."""
# 
# class ConfigNotFoundError(CardinalException):
#     """Raised when an expected plugin config isn't found."""
# 
# class EventAlreadyExistsError(CardinalException):
#     """Raised durring attempt to register an event name already registered."""
# 
# class EventCallbackError(CardinalException):
#     """Raised when there is an error with a callback."""
# 
# class EventDoesNotExistError(CardinalException):
#     """Raised during attempt to register a callback for a nonexistent event."""
# 
# class EventRejectedMessage(CardinalException):
#     """Raised when an event callback wants to reject an event."""
# 
# class PluginError(CardinalException):
#     """Raised when a plugin is invalid in some way."""


import os
import re
import string
import logging
import importlib
import inspect
import linecache
import random
import json
from collections import defaultdict
from copy import copy
from importlib import reload
from cardinal.exceptions import (
    CommandNotFoundError,
    ConfigNotFoundError,
    EventAlreadyExistsError,
    EventCallbackError,
    EventDoesNotExistError,
    EventRejectedMessage,
    PluginError,
)
from twisted.internet import defer
        self.logger.debug("Attempting to unregister event: %s" % name)

        if name not in self.registered_events:
            self.logger.debug("Event does not exist: %s" % name)
            raise EventDoesNotExistError(
                "Can't remove nonexistent event: %s" % name
            )

        del self.registered_events[name]
        del self.registered_callbacks[name]

        self.logger.info("Removed event: %s" % name)

    def register_callback(self, event_name, callback):
        """Registers a callback to be called when an event fires.

        Keyword arguments:
          event_name -- Event name to bind callback to.
          callback -- Callable to bind.

        Raises:
          EventCallbackError -- If an invalid callback is passed in.
        """
        self.logger.debug(
            "Attempting to register callback for event: %s" % event_name
        )

        try:
            parameters = inspect.signature(callback).parameters
        except TypeError:

# Path: cardinal/exceptions.py
# class CommandNotFoundError(CardinalException):
#     """Raised when a given command isn't loaded."""
# 
# class ConfigNotFoundError(CardinalException):
#     """Raised when an expected plugin config isn't found."""
# 
# class EventAlreadyExistsError(CardinalException):
#     """Raised durring attempt to register an event name already registered."""
# 
# class EventCallbackError(CardinalException):
#     """Raised when there is an error with a callback."""
# 
# class EventDoesNotExistError(CardinalException):
#     """Raised during attempt to register a callback for a nonexistent event."""
# 
# class EventRejectedMessage(CardinalException):
#     """Raised when an event callback wants to reject an event."""
# 
# class PluginError(CardinalException):
#     """Raised when a plugin is invalid in some way."""


# Path: cardinal/plugins.py
import os
import re
import string
import logging
import importlib
import inspect
import linecache
import random
import json
from collections import defaultdict
from copy import copy
from importlib import reload
from cardinal.exceptions import (
    CommandNotFoundError,
    ConfigNotFoundError,
    EventAlreadyExistsError,
    EventCallbackError,
    EventDoesNotExistError,
    EventRejectedMessage,
    PluginError,
)
from twisted.internet import defer

        self.logger.debug("Attempting to unregister event: %s" % name)

        if name not in self.registered_events:
            self.logger.debug("Event does not exist: %s" % name)
            raise EventDoesNotExistError(
                "Can't remove nonexistent event: %s" % name
            )

        del self.registered_events[name]
        del self.registered_callbacks[name]

        self.logger.info("Removed event: %s" % name)

    def register_callback(self, event_name, callback):
        """Registers a callback to be called when an event fires.

        Keyword arguments:
          event_name -- Event name to bind callback to.
          callback -- Callable to bind.

        Raises:
          EventCallbackError -- If an invalid callback is passed in.
        """
        self.logger.debug(
            "Attempting to register callback for event: %s" % event_name
        )

        try:
            parameters = inspect.signature(callback).parameters
        except TypeError:

            raise EventCallbackError(