Show a dialog while waiting for Tor rendezvous nodes to close, and let the user quit early

desktop/src/onionshare/main_window.py

@@ -30,6 +30,7 @@ from .widgets import Alert
 from .update_checker import UpdateThread
 from .tab_widget import TabWidget
 from .gui_common import GuiCommon
+from .threads import OnionCleanupThread
 
 
 class MainWindow(QtWidgets.QMainWindow):
@@ -287,7 +288,30 @@ class MainWindow(QtWidgets.QMainWindow):
     def cleanup(self):
         self.common.log("MainWindow", "cleanup")
         self.tabs.cleanup()
-        self.common.gui.onion.cleanup()
+
+        alert = Alert(
+            self.common,
+            strings._("gui_rendezvous_cleanup"),
+            QtWidgets.QMessageBox.Information,
+            buttons=QtWidgets.QMessageBox.NoButton,
+            autostart=False,
+        )
+        quit_early_button = QtWidgets.QPushButton(
+            strings._("gui_rendezvous_cleanup_quit_early")
+        )
+        alert.addButton(quit_early_button, QtWidgets.QMessageBox.RejectRole)
+
+        self.onion_cleanup_thread = OnionCleanupThread(self.common)
+        self.onion_cleanup_thread.finished.connect(alert.accept)
+        self.onion_cleanup_thread.start()
+
+        alert.exec_()
+        if alert.clickedButton() == quit_early_button:
+            self.common.log("MainWindow", "cleanup", "quitting early")
+            if self.onion_cleanup_thread.isRunning():
+                self.onion_cleanup_thread.terminate()
+                self.onion_cleanup_thread.wait()
+            self.common.gui.onion.cleanup(wait=False)
 
         # Wait 1 second for threads to close gracefully, so tests finally pass
         time.sleep(1)

desktop/src/onionshare/resources/locale/en.json

@@ -187,5 +187,7 @@
     "settings_error_unreadable_cookie_file": "Connected to the Tor controller, but password may be wrong, or your user is not permitted to read the cookie file.",
     "settings_error_bundled_tor_not_supported": "Using the Tor version that comes with OnionShare does not work in developer mode on Windows or macOS.",
     "settings_error_bundled_tor_timeout": "Taking too long to connect to Tor. Maybe you aren't connected to the Internet, or have an inaccurate system clock?",
-    "settings_error_bundled_tor_broken": "OnionShare could not connect to Tor:\n{}"
+    "settings_error_bundled_tor_broken": "OnionShare could not connect to Tor:\n{}",
+    "gui_rendezvous_cleanup": "Waiting for Tor rendezvous circuits to close to be sure that the files you shared downloaded successfully.\n\nThis might take a few minutes.",
+    "gui_rendezvous_cleanup_quit_early": "Quit Early"
 }

desktop/src/onionshare/threads.py

@@ -252,3 +252,18 @@ class EventHandlerThread(QtCore.QThread):
             if self.should_quit:
                 break
             time.sleep(0.2)
+
+
+class OnionCleanupThread(QtCore.QThread):
+    """
+    Wait for Tor rendezvous circuits to close in a separate thread
+    """
+
+    def __init__(self, common):
+        super(OnionCleanupThread, self).__init__()
+        self.common = common
+        self.common.log("OnionCleanupThread", "__init__")
+
+    def run(self):
+        self.common.log("OnionCleanupThread", "run")
+        self.common.gui.onion.cleanup()