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https://github.com/AstrBotDevs/AstrBot
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97 lines
2.7 KiB
Python
97 lines
2.7 KiB
Python
import io
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import os
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import threading
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from collections.abc import Callable, Iterable
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from logging import Logger
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from types import TracebackType
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from typing import Any, Self
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class LogPipe(threading.Thread, io.TextIOBase):
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"""A pipe wrapper that routes written content to a logger.
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Implements TextIO interface for compatibility with code expecting
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a text stream, while also logging all written content.
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"""
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def __init__(
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self,
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level: int,
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logger: Logger,
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identifier: str | None = None,
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callback: Callable[[str], None] | None = None,
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) -> None:
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threading.Thread.__init__(self)
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self.daemon = True
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self.level = level
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self._logger = logger
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self._identifier = identifier
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self._callback = callback
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self._closed = False
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self.fd_read, self.fd_write = os.pipe()
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self._reader = os.fdopen(self.fd_read, "r")
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self.mode = "w"
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self.name = f"<LogPipe-{self._identifier}>"
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self.start()
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def fileno(self) -> int:
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return self.fd_write
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def write(self, s: str) -> int:
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"""Write string to pipe - content will be logged."""
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if self._closed:
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raise ValueError("I/O operation on closed file")
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self._logger.log(self.level, f"[{self._identifier}] {s.rstrip()}")
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if self._callback:
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self._callback(s.strip())
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return len(s)
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def flush(self) -> None:
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"""No-op for compatibility - log writes are immediate."""
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pass
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def close(self) -> None:
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"""Close the write end of the pipe."""
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if not self._closed:
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self._closed = True
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os.close(self.fd_write)
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def isatty(self) -> bool:
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return False
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def writable(self) -> bool:
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return not self._closed
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def readable(self) -> bool:
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return False
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def seekable(self) -> bool:
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return False
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def writelines(self, lines: Iterable[Any]) -> None:
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for line in lines:
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self.write(line)
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def run(self) -> None:
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"""Read from pipe and log each line."""
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for line in iter(self._reader.readline, ""):
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if self._closed:
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break
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stripped = line.strip()
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if stripped:
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self._logger.log(self.level, f"[{self._identifier}] {stripped}")
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if self._callback:
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self._callback(stripped)
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self._reader.close()
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def __enter__(self) -> Self:
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return self
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def __exit__(
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self,
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exc_type: type[BaseException] | None,
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exc_val: BaseException | None,
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exc_tb: TracebackType | None,
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) -> None:
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self.close()
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