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authorEgor Tensin <Egor.Tensin@gmail.com>2021-05-03 21:40:30 +0300
committerEgor Tensin <Egor.Tensin@gmail.com>2021-05-03 21:40:30 +0300
commit7638522df30e6ef24ab3f76a529b135e58fa25a1 (patch)
tree77ee74fe6caefad5274da324eef83e4bdeb6779e /vk/tracking/status_tracker.py
parentvk.tracking: merge online_sessions into sessions (diff)
downloadvk-scripts-7638522df30e6ef24ab3f76a529b135e58fa25a1.tar.gz
vk-scripts-7638522df30e6ef24ab3f76a529b135e58fa25a1.zip
vk.tracking: status_tracker -> status
Diffstat (limited to 'vk/tracking/status_tracker.py')
-rw-r--r--vk/tracking/status_tracker.py139
1 files changed, 0 insertions, 139 deletions
diff --git a/vk/tracking/status_tracker.py b/vk/tracking/status_tracker.py
deleted file mode 100644
index a16a34e..0000000
--- a/vk/tracking/status_tracker.py
+++ /dev/null
@@ -1,139 +0,0 @@
-# Copyright (c) 2016 Egor Tensin <Egor.Tensin@gmail.com>
-# This file is part of the "VK scripts" project.
-# For details, see https://github.com/egor-tensin/vk-scripts.
-# Distributed under the MIT License.
-
-from collections.abc import Callable
-import contextlib
-import time
-import signal
-
-import vk.error
-from vk.user import UserField
-
-
-class StatusTracker:
- DEFAULT_TIMEOUT = 5
-
- def __init__(self, api, timeout=DEFAULT_TIMEOUT):
- self._api = api
- self._timeout = timeout
- self._on_initial_status = []
- self._on_status_update = []
- self._on_connection_error = []
-
- def _wait_after_connection_error(self):
- time.sleep(self._timeout)
-
- def add_database_writer(self, writer):
- self.add_initial_status_handler(writer.on_initial_status)
- self.add_status_update_handler(writer.on_status_update)
- self.add_connection_error_handler(writer.on_connection_error)
-
- def add_initial_status_handler(self, fn):
- self._assert_is_callback(fn)
- self._on_initial_status.append(fn)
-
- def add_status_update_handler(self, fn):
- self._assert_is_callback(fn)
- self._on_status_update.append(fn)
-
- def add_connection_error_handler(self, fn):
- self._assert_is_callback(fn)
- self._on_connection_error.append(fn)
-
- @staticmethod
- def _assert_is_callback(fn):
- if not isinstance(fn, Callable):
- raise TypeError()
-
- _USER_FIELDS = UserField.DOMAIN, UserField.ONLINE, UserField.LAST_SEEN,
-
- def _query_status(self, uids):
- user_list = self._api.users_get(uids, self._USER_FIELDS,
- deactivated_users=False)
- return {user.get_uid(): user for user in user_list}
-
- def _notify_status(self, user):
- for fn in self._on_initial_status:
- fn(user)
-
- def _notify_status_update(self, user):
- for fn in self._on_status_update:
- fn(user)
-
- def _notify_connection_error(self, e):
- for fn in self._on_connection_error:
- fn(e)
-
- def _query_initial_status(self, uids):
- while True:
- try:
- return self._query_status(uids)
- except vk.error.APIConnectionError as e:
- self._notify_connection_error(e)
- self._wait_after_connection_error()
-
- def _query_status_updates(self, uids):
- while True:
- self._wait_after_connection_error()
- try:
- return self._query_status(uids)
- except vk.error.APIConnectionError as e:
- self._notify_connection_error(e)
-
- @staticmethod
- def _filter_status_updates(old_users, new_users):
- for uid, user in new_users.items():
- if old_users[uid].is_online() != user.is_online():
- old_users[uid] = user
- yield user
-
- def query_status(self, uids):
- users = self._query_initial_status(uids)
- for user in users.values():
- self._notify_status(user)
- return users
-
- def _do_loop(self, uids):
- users = self.query_status(uids)
- while True:
- updated_users = self._query_status_updates(uids)
- for user in self._filter_status_updates(users, updated_users):
- self._notify_status_update(user)
-
- class StopLooping(RuntimeError):
- pass
-
- @staticmethod
- def _stop_looping(signo, frame):
- raise StatusTracker.StopLooping()
-
- @staticmethod
- @contextlib.contextmanager
- def _handle_signal(signo, handler):
- old_handler = signal.getsignal(signo)
- signal.signal(signo, handler)
- try:
- yield
- finally:
- signal.signal(signal.SIGINT, old_handler)
-
- @staticmethod
- def _handle_sigint():
- # Python doesn't raise KeyboardInterrupt in case a real SIGINT is sent
- # from outside, surprisingly.
- return StatusTracker._handle_signal(signal.SIGINT,
- StatusTracker._stop_looping)
-
- @staticmethod
- def _handle_sigterm():
- return StatusTracker._handle_signal(signal.SIGTERM,
- StatusTracker._stop_looping)
-
- def loop(self, uids):
- with self._handle_sigint(), self._handle_sigterm():
- try:
- self._do_loop(uids)
- except (KeyboardInterrupt, StatusTracker.StopLooping):
- pass