From 0dbed18ba19a6195ce3cded9b4ec8dfcf798c71f Mon Sep 17 00:00:00 2001
From: atse <atse@m-labs.hk>
Date: Tue, 9 Jul 2024 16:39:11 +0800
Subject: [PATCH] Connecting task moved?

---
 pytec/pytec/aioclient.py            | 34 ++++-------------------------
 pytec/pytec/gui/model/thermostat.py |  5 +----
 pytec/tec_qt.py                     | 14 ++++++++----
 3 files changed, 15 insertions(+), 38 deletions(-)

diff --git a/pytec/pytec/aioclient.py b/pytec/pytec/aioclient.py
index 156f348..bd46c79 100644
--- a/pytec/pytec/aioclient.py
+++ b/pytec/pytec/aioclient.py
@@ -7,56 +7,30 @@ class CommandError(Exception):
     pass
 
 
-class StoppedConnecting(Exception):
-    pass
-
-
 class AsyncioClient:
     def __init__(self):
         self._reader = None
         self._writer = None
-        self._connecting_task = None
         self._command_lock = asyncio.Lock()
         self._report_mode_on = False
         self.timeout = None
 
-    async def start_session(self, host="192.168.1.26", port=23, timeout=None):
+    async def start_session(self, host="192.168.1.26", port=23):
         """Start session to Thermostat at specified host and port.
-        Throws StoppedConnecting if disconnect was called while connecting.
-        Throws asyncio.TimeoutError if timeout was exceeded.
 
         Example::
             client = AsyncioClient()
-            try:
-                await client.start_session()
-            except StoppedConnecting:
-                print("Stopped connecting")
+            await client.start_session()
         """
-        self._connecting_task = asyncio.create_task(
-            asyncio.wait_for(asyncio.open_connection(host, port), timeout)
-        )
-        self.timeout = timeout
-        try:
-            self._reader, self._writer = await self._connecting_task
-        except asyncio.CancelledError:
-            raise StoppedConnecting
-        finally:
-            self._connecting_task = None
-
+        self._reader, self._writer = await asyncio.open_connection(host, port)
         await self._check_zero_limits()
 
-    def connecting(self):
-        """Returns True if client is connecting"""
-        return self._connecting_task is not None
-
     def connected(self):
         """Returns True if client is connected"""
         return self._writer is not None
 
     async def end_session(self):
-        """End session to Thermostat if connected, cancel connection if connecting"""
-        if self._connecting_task is not None:
-            self._connecting_task.cancel()
+        """End session to Thermostat"""
 
         if self._writer is None:
             return
diff --git a/pytec/pytec/gui/model/thermostat.py b/pytec/pytec/gui/model/thermostat.py
index 8dc8e52..061039f 100644
--- a/pytec/pytec/gui/model/thermostat.py
+++ b/pytec/pytec/gui/model/thermostat.py
@@ -29,7 +29,7 @@ class Thermostat(QObject, metaclass=PropertyMeta):
         super().__init__(parent)
 
     async def start_session(self, host, port):
-        await self._client.start_session(host, port, timeout=5)
+        await self._client.start_session(host, port)
 
     async def run(self):
         self._update_params_task = asyncio.create_task(self.update_params())
@@ -70,9 +70,6 @@ class Thermostat(QObject, metaclass=PropertyMeta):
     def connected(self):
         return self._client.connected()
 
-    def connecting(self):
-        return self._client.connecting()
-
     def start_watching(self):
         self._watch_task = asyncio.create_task(self.run())
 
diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 64c5409..db715ad 100755
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -12,7 +12,6 @@ import json
 from autotune import PIDAutotuneState
 from qasync import asyncSlot, asyncClose
 import qasync
-from pytec.aioclient import StoppedConnecting
 import asyncio
 import logging
 import argparse
@@ -245,19 +244,26 @@ class MainWindow(QtWidgets.QMainWindow):
             self.conn_menu.host_set_line.text(),
             self.conn_menu.port_set_spin.value(),
         )
+
+        self._connecting_task = None
         try:
-            if not (self.thermostat.connecting() or self.thermostat.connected()):
+            if (self._connecting_task is None) or (not self.thermostat.connected()):
                 self.status_lbl.setText("Connecting...")
                 self.connect_btn.setText("Stop")
                 self.conn_menu.host_set_line.setEnabled(False)
                 self.conn_menu.port_set_spin.setEnabled(False)
 
                 try:
-                    await self.thermostat.start_session(host=host, port=port)
-                except StoppedConnecting:
+                    self._connecting_task = asyncio.wait_for(
+                        self.thermostat.start_session(host=host, port=port), timeout=5
+                    )
+                    await self._connecting_task
+                except asyncio.TimeoutError:
                     return
                 await self._on_connection_changed(True)
             else:
+                if self._connecting_task is not None:
+                    self._connecting_task.cancel()
                 await self.bail()
 
         # TODO: Remove asyncio.TimeoutError in Python 3.11