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from __future__ import annotations
from typing import Any, Awaitable, Coroutine, Generator, Tuple, TypeVar
from uuid import uuid4
import weechat
from slack.shared import shared
from slack.util import get_callback_name
T = TypeVar("T")
class Future(Awaitable[T]):
def __init__(self):
self.id = str(uuid4())
def __await__(self) -> Generator[Future[T], T, T]:
return (yield self)
class FutureProcess(Future[Tuple[str, int, str, str]]):
pass
class FutureTimer(Future[Tuple[int]]):
pass
class Task(Future[T]):
def __init__(self, coroutine: Coroutine[Future[Any], Any, T], final: bool):
super().__init__()
self.coroutine = coroutine
self.final = final
def weechat_task_cb(data: str, *args: Any) -> int:
task = shared.active_tasks.pop(data)
task_runner(task, args)
return weechat.WEECHAT_RC_OK
def task_runner(task: Task[Any], response: Any):
while True:
try:
future = task.coroutine.send(response)
if future.id in shared.active_responses:
response = shared.active_responses.pop(future.id)
else:
if future.id in shared.active_tasks:
raise Exception(
f"future.id in active_tasks, {future.id}, {shared.active_tasks}"
)
shared.active_tasks[future.id] = task
break
except StopIteration as e:
if task.id in shared.active_tasks:
task = shared.active_tasks.pop(task.id)
response = e.value
else:
if task.id in shared.active_responses:
raise Exception( # pylint: disable=raise-missing-from
f"task.id in active_responses, {task.id}, {shared.active_responses}"
)
if not task.final:
shared.active_responses[task.id] = e.value
break
def create_task(
coroutine: Coroutine[Future[Any], Any, T], final: bool = False
) -> Task[T]:
task = Task(coroutine, final)
task_runner(task, None)
return task
async def sleep(milliseconds: int):
future = FutureTimer()
weechat.hook_timer(
milliseconds, 0, 1, get_callback_name(weechat_task_cb), future.id
)
return await future
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