38 lines
999 B
Python
38 lines
999 B
Python
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from __future__ import annotations
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from typing import Any, NamedTuple
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class NoHandler(Exception):
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"""Raised when handler isn't found in the meta."""
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class HandlerArguments(NamedTuple):
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"""Information for event handler."""
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modifiers: set[str]
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action: Any
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def extract_handler_actions(event_name: str, meta: dict[str, Any]) -> HandlerArguments:
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"""Extract action from meta dict.
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Args:
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event_name: Event to check from.
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meta: Meta information (stored in Rich Style)
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Raises:
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NoHandler: If no handler is found.
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Returns:
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Action information.
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"""
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event_path = event_name.split(".")
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for key, value in meta.items():
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if key.startswith("@"):
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name_args = key[1:].split(".")
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if name_args[: len(event_path)] == event_path:
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modifiers = name_args[len(event_path) :]
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return HandlerArguments(set(modifiers), value)
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raise NoHandler(f"No handler for {event_name!r}")
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