app/liteyuki/dev/observer.py

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"""
此模块用于注册观察者函数使用watchdog监控文件变化并重启bot
启用该模块需要在配置文件中设置`dev_mode`为True
"""
import time
from typing import Callable, TypeAlias
from watchdog.events import FileSystemEvent, FileSystemEventHandler
from watchdog.observers import Observer
from liteyuki import get_bot, get_config_with_compat, logger
liteyuki_bot = get_bot()
CALLBACK_FUNC: TypeAlias = Callable[[FileSystemEvent], None] # 位置1为FileSystemEvent
FILTER_FUNC: TypeAlias = Callable[[FileSystemEvent], bool] # 位置1为FileSystemEvent
observer = Observer()
def debounce(wait):
"""
防抖函数
"""
def decorator(func):
def wrapper(*args, **kwargs):
nonlocal last_call_time
current_time = time.time()
if (current_time - last_call_time) > wait:
last_call_time = current_time
return func(*args, **kwargs)
last_call_time = None
return wrapper
return decorator
if get_config_with_compat("liteyuki.reload", ("dev_mode",), False):
logger.debug("Liteyuki Reload enabled, watching for file changes...")
observer.start()
class CodeModifiedHandler(FileSystemEventHandler):
"""
Handler for code file changes
"""
@debounce(1)
def on_modified(self, event):
raise NotImplementedError("on_modified must be implemented")
def on_created(self, event):
self.on_modified(event)
def on_deleted(self, event):
self.on_modified(event)
def on_moved(self, event):
self.on_modified(event)
def on_any_event(self, event):
self.on_modified(event)
def on_file_system_event(directories: tuple[str], recursive: bool = True, event_filter: FILTER_FUNC = None) -> Callable[[CALLBACK_FUNC], CALLBACK_FUNC]:
"""
注册文件系统变化监听器
Args:
directories: 监听目录们
recursive: 是否递归监听子目录
event_filter: 事件过滤器, 返回True则执行回调函数
Returns:
装饰器,装饰一个函数在接收到数据后执行
"""
def decorator(func: CALLBACK_FUNC) -> CALLBACK_FUNC:
def wrapper(event: FileSystemEvent):
if event_filter is not None and not event_filter(event):
return
func(event)
code_modified_handler = CodeModifiedHandler()
code_modified_handler.on_modified = wrapper
for directory in directories:
observer.schedule(code_modified_handler, directory, recursive=recursive)
return func
return decorator