From 7638522df30e6ef24ab3f76a529b135e58fa25a1 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Mon, 3 May 2021 21:40:30 +0300
Subject: vk.tracking: status_tracker -> status

---
 vk/tracking/status_tracker.py | 139 ------------------------------------------
 1 file changed, 139 deletions(-)
 delete mode 100644 vk/tracking/status_tracker.py

(limited to 'vk/tracking/status_tracker.py')

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
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