[Core] Fix getting libtorrent alert type

Encountered a problem with dht_error alert not returning the correct
alert name using Python type.

This should likely be fixed in libtorrent but we should be using
the alert.what method to determine alert type/name.

Since the alert name does not include the `_alert` suffix, strip this
when registering alerts.

deluge/core/alertmanager.py

@@ -79,6 +79,9 @@ def register_handler(self, alert_type: str, handler: Callable[[Any], None]) -> N
                 Can be supplied with or without `_alert` suffix.
             handler: Callback function when the alert is raised.
         """
+        if alert_type and alert_type.endswith('_alert'):
+            alert_type = alert_type[: -len('_alert')]
+
         self.handlers[alert_type].append(handler)
         log.debug('Registered handler for alert %s', alert_type)
 
@@ -111,7 +114,8 @@ def handle_alerts(self):
             )
 
         for alert in alerts:
-            alert_type = type(alert).__name__
+            alert_type = alert.what()
+
             # Display the alert message
             if log.isEnabledFor(logging.DEBUG):
                 log.debug('%s: %s', alert_type, decode_bytes(alert.message()))

deluge/core/core.py

@@ -199,7 +199,7 @@ def __init__(
         self.session_status_timer_interval = 0.5
         self.session_status_timer = task.LoopingCall(self.session.post_session_stats)
         self.alertmanager.register_handler(
-            'session_stats_alert', self._on_alert_session_stats
+            'session_stats', self._on_alert_session_stats
         )
         self.session_rates_timer_interval = 2
         self.session_rates_timer = task.LoopingCall(self._update_session_rates)

deluge/core/torrentmanager.py

@@ -202,34 +202,32 @@ def __init__(self):
 
         # Register alert functions
         alert_handles = [
-            'external_ip_alert',
-            'performance_alert',
-            'add_torrent_alert',
-            'metadata_received_alert',
-            'torrent_finished_alert',
-            'torrent_paused_alert',
-            'torrent_checked_alert',
-            'torrent_resumed_alert',
-            'tracker_reply_alert',
-            'tracker_announce_alert',
-            'tracker_warning_alert',
-            'tracker_error_alert',
-            'file_renamed_alert',
-            'file_error_alert',
-            'file_completed_alert',
-            'storage_moved_alert',
-            'storage_moved_failed_alert',
-            'state_update_alert',
-            'state_changed_alert',
-            'save_resume_data_alert',
-            'save_resume_data_failed_alert',
-            'fastresume_rejected_alert',
+            'external_ip',
+            'performance',
+            'add_torrent',
+            'metadata_received',
+            'torrent_finished',
+            'torrent_paused',
+            'torrent_checked',
+            'torrent_resumed',
+            'tracker_reply',
+            'tracker_announce',
+            'tracker_warning',
+            'tracker_error',
+            'file_renamed',
+            'file_error',
+            'file_completed',
+            'storage_moved',
+            'storage_moved_failed',
+            'state_update',
+            'state_changed',
+            'save_resume_data',
+            'save_resume_data_failed',
+            'fastresume_rejected',
         ]
 
         for alert_handle in alert_handles:
-            on_alert_func = getattr(
-                self, ''.join(['on_alert_', alert_handle.replace('_alert', '')])
-            )
+            on_alert_func = getattr(self, ''.join(['on_alert_', alert_handle]))
             self.alerts.register_handler(alert_handle, on_alert_func)
 
         # Define timers

deluge/tests/test_alertmanager.py

@@ -21,15 +21,19 @@ def tear_down(self):
 
     def test_register_handler(self):
         def handler(alert):
-            return
+            ...
 
-        self.am.register_handler('dummy_alert', handler)
-        assert self.am.handlers['dummy_alert'] == [handler]
+        self.am.register_handler('dummy1', handler)
+        self.am.register_handler('dummy2_alert', handler)
+        assert self.am.handlers['dummy1'] == [handler]
+        assert self.am.handlers['dummy2'] == [handler]
 
     def test_deregister_handler(self):
         def handler(alert):
-            return
+            ...
 
-        self.am.register_handler('dummy_alert', handler)
+        self.am.register_handler('dummy1', handler)
+        self.am.register_handler('dummy2_alert', handler)
         self.am.deregister_handler(handler)
-        assert self.am.handlers['dummy_alert'] == []
+        assert self.am.handlers['dummy1'] == []
+        assert self.am.handlers['dummy2'] == []