def async_track_point_in_utc_time(hass, action, point_in_time):
"""Add a listener that fires once after a specific point in UTC time."""
# Ensure point_in_time is UTC
point_in_time = event.dt_util.as_utc(point_in_time)
# Since this is called once, we accept a HassJob so we can avoid
# having to figure out how to call the action every time its called.
job = action if isinstance(action, ha.HassJob) else ha.HassJob(action)
@ha.callback
def point_in_time_listener(event):
"""Listen for matching time_changed events."""
now = event.data[ATTR_NOW]
if now < point_in_time or hasattr(point_in_time_listener, "run"):
return
# Set variable so that we will never run twice.
# Because the event bus might have to wait till a thread comes
# available to execute this listener it might occur that the
# listener gets lined up twice to be executed. This will make
# sure the second time it does nothing.
setattr(point_in_time_listener, "run", True)
async_unsub()
hass.async_run_hass_job(job, now)
async_unsub = hass.bus.async_listen(EVENT_TIME_CHANGED,
point_in_time_listener)
return async_unsub
def async_listen_platform(
hass: core.HomeAssistant,
component: str,
callback: Callable[[str, Optional[Dict[str, Any]]], Any],
) -> None:
"""Register a platform loader listener.
This method must be run in the event loop.
"""
service = EVENT_LOAD_PLATFORM.format(component)
job = core.HassJob(callback)
async def discovery_platform_listener(event: core.Event) -> None:
"""Listen for platform discovery events."""
if event.data.get(ATTR_SERVICE) != service:
return
platform = event.data.get(ATTR_PLATFORM)
if not platform:
return
task = hass.async_run_hass_job(job, platform,
event.data.get(ATTR_DISCOVERED))
if task:
await task
hass.bus.async_listen(EVENT_PLATFORM_DISCOVERED,
discovery_platform_listener)
def async_listen_platform(
hass: core.HomeAssistant,
component: str,
callback: Callable[[str, dict[str, Any] | None], Any],
) -> None:
"""Register a platform loader listener.
This method must be run in the event loop.
"""
service = EVENT_LOAD_PLATFORM.format(component)
job = core.HassJob(callback)
async def discovery_platform_listener(discovered: DiscoveryDict) -> None:
"""Listen for platform discovery events."""
platform = discovered["platform"]
if not platform:
return
task = hass.async_run_hass_job(job, platform, discovered.get("discovered"))
if task:
await task
async_dispatcher_connect(
hass, SIGNAL_PLATFORM_DISCOVERED.format(service), discovery_platform_listener
)
def async_listen(
hass: core.HomeAssistant,
service: Union[str, Collection[str]],
callback: CALLBACK_TYPE,
) -> None:
"""Set up listener for discovery of specific service.
Service can be a string or a list/tuple.
"""
if isinstance(service, str):
service = (service, )
else:
service = tuple(service)
job = core.HassJob(callback)
async def discovery_event_listener(event: core.Event) -> None:
"""Listen for discovery events."""
if ATTR_SERVICE in event.data and event.data[ATTR_SERVICE] in service:
task = hass.async_run_hass_job(job, event.data[ATTR_SERVICE],
event.data.get(ATTR_DISCOVERED))
if task:
await task
hass.bus.async_listen(EVENT_PLATFORM_DISCOVERED, discovery_event_listener)
def async_track_utc_time_change(
hass, action, hour=None, minute=None, second=None, local=False
):
"""Add a listener that will fire if time matches a pattern."""
job = ha.HassJob(action)
# We do not have to wrap the function with time pattern matching logic
# if no pattern given
if all(val is None for val in (hour, minute, second)):
@ha.callback
def time_change_listener(ev) -> None:
"""Fire every time event that comes in."""
hass.async_run_hass_job(job, ev.data[ATTR_NOW])
return hass.bus.async_listen(EVENT_TIME_CHANGED, time_change_listener)
matching_seconds = event.dt_util.parse_time_expression(second, 0, 59)
matching_minutes = event.dt_util.parse_time_expression(minute, 0, 59)
matching_hours = event.dt_util.parse_time_expression(hour, 0, 23)
next_time = None
def calculate_next(now) -> None:
"""Calculate and set the next time the trigger should fire."""
nonlocal next_time
localized_now = event.dt_util.as_local(now) if local else now
next_time = event.dt_util.find_next_time_expression_time(
localized_now, matching_seconds, matching_minutes, matching_hours
)
# Make sure rolling back the clock doesn't prevent the timer from
# triggering.
last_now = None
@ha.callback
def pattern_time_change_listener(ev) -> None:
"""Listen for matching time_changed events."""
nonlocal next_time, last_now
now = ev.data[ATTR_NOW]
if last_now is None or now < last_now:
# Time rolled back or next time not yet calculated
calculate_next(now)
last_now = now
if next_time <= now:
hass.async_run_hass_job(
job, event.dt_util.as_local(now) if local else now
)
calculate_next(now + datetime.timedelta(seconds=1))
# We can't use async_track_point_in_utc_time here because it would
# break in the case that the system time abruptly jumps backwards.
# Our custom last_now logic takes care of resolving that scenario.
return hass.bus.async_listen(EVENT_TIME_CHANGED, pattern_time_change_listener)
def test_async_add_hass_job_schedule_callback():
"""Test that we schedule coroutines and add jobs to the job pool."""
hass = MagicMock()
job = MagicMock()
ha.HomeAssistant.async_add_hass_job(hass, ha.HassJob(ha.callback(job)))
assert len(hass.loop.call_soon.mock_calls) == 1
assert len(hass.loop.create_task.mock_calls) == 0
assert len(hass.add_job.mock_calls) == 0
def test_async_add_hass_job_schedule_partial_callback():
"""Test that we schedule partial coros and add jobs to the job pool."""
hass = MagicMock()
job = MagicMock()
partial = functools.partial(ha.callback(job))
ha.HomeAssistant.async_add_hass_job(hass, ha.HassJob(partial))
assert len(hass.loop.call_soon.mock_calls) == 1
assert len(hass.loop.create_task.mock_calls) == 0
assert len(hass.add_job.mock_calls) == 0
def test_async_add_hass_job_schedule_coroutinefunction(loop):
"""Test that we schedule coroutines and add jobs to the job pool."""
hass = MagicMock(loop=MagicMock(wraps=loop))
async def job():
pass
ha.HomeAssistant.async_add_hass_job(hass, ha.HassJob(job))
assert len(hass.loop.call_soon.mock_calls) == 0
assert len(hass.loop.create_task.mock_calls) == 1
assert len(hass.add_job.mock_calls) == 0
def test_async_run_hass_job_delegates_non_async():
"""Test that the callback annotation is respected."""
hass = MagicMock()
calls = []
def job():
calls.append(1)
ha.HomeAssistant.async_run_hass_job(hass, ha.HassJob(job))
assert len(calls) == 0
assert len(hass.async_add_hass_job.mock_calls) == 1
def test_async_add_job_add_hass_threaded_job_to_pool():
"""Test that we schedule coroutines and add jobs to the job pool."""
hass = MagicMock()
def job():
pass
ha.HomeAssistant.async_add_hass_job(hass, ha.HassJob(job))
assert len(hass.loop.call_soon.mock_calls) == 0
assert len(hass.loop.create_task.mock_calls) == 0
assert len(hass.loop.run_in_executor.mock_calls) == 1
async def test_hassjob_forbid_coroutine():
"""Test hassjob forbids coroutines."""
async def bla():
pass
coro = bla()
with pytest.raises(ValueError):
ha.HassJob(coro)
# To avoid warning about unawaited coro
await coro
def async_listen(
hass: core.HomeAssistant,
service: str,
callback: CALLBACK_TYPE,
) -> None:
"""Set up listener for discovery of specific service.
Service can be a string or a list/tuple.
"""
job = core.HassJob(callback)
async def discovery_event_listener(discovered: DiscoveryDict) -> None:
"""Listen for discovery events."""
task = hass.async_run_hass_job(job, discovered["service"],
discovered["discovered"])
if task:
await task
async_dispatcher_connect(hass, SIGNAL_PLATFORM_DISCOVERED.format(service),
discovery_event_listener)
