1 files changed, 66 insertions, 0 deletions
diff --git a/deluge/core/eventmanager.py b/deluge/core/eventmanager.py
new file mode 100644
index 0000000..d43847a
--- /dev/null
+++ b/deluge/core/eventmanager.py
@@ -0,0 +1,66 @@
+#
+# Copyright (C) 2009 Andrew Resch <andrewresch@gmail.com>
+#
+# This file is part of Deluge and is licensed under GNU General Public License 3.0, or later, with
+# the additional special exception to link portions of this program with the OpenSSL library.
+# See LICENSE for more details.
+#
+
+import logging
+
+import deluge.component as component
+
+log = logging.getLogger(__name__)
+
+
+class EventManager(component.Component):
+    def __init__(self):
+        component.Component.__init__(self, 'EventManager')
+        self.handlers = {}
+
+    def emit(self, event):
+        """
+        Emits the event to interested clients.
+
+        :param event: DelugeEvent
+        """
+        # Emit the event to the interested clients
+        component.get('RPCServer').emit_event(event)
+        # Call any handlers for the event
+        if event.name in self.handlers:
+            for handler in self.handlers[event.name]:
+                # log.debug('Running handler %s for event %s with args: %s', event.name, handler, event.args)
+                try:
+                    handler(*event.args)
+                except Exception as ex:
+                    log.error(
+                        'Event handler %s failed in %s with exception %s',
+                        event.name,
+                        handler,
+                        ex,
+                    )
+
+    def register_event_handler(self, event, handler):
+        """
+        Registers a function to be called when a `:param:event` is emitted.
+
+        :param event: str, the event name
+        :param handler: function, to be called when `:param:event` is emitted
+
+        """
+        if event not in self.handlers:
+            self.handlers[event] = []
+
+        if handler not in self.handlers[event]:
+            self.handlers[event].append(handler)
+
+    def deregister_event_handler(self, event, handler):
+        """
+        Deregisters an event handler function.
+
+        :param event: str, the event name
+        :param handler: function, currently registered to handle `:param:event`
+
+        """
+        if event in self.handlers and handler in self.handlers[event]:
+            self.handlers[event].remove(handler)