New Event + EventHandler model.

[avaidyam]

Event shall describe an action in the Parrot UI.
EventHandler shall describe a response to an action in the Parrot UI.

Events:

• FocusEvent: A person changed their focus (viewing or typing in a conversation). Includes self.
• PresenceEvent: A person's presence changed. Includes self. Includes dis/connections.
• MessageEvent: A message was sent or received. Includes self.
  • Properties: Group?, Background?, Sent?
• InvitationEvent: A person was invited to join a conversation.
• MentionEvent: A name or a keyword was mentioned in a conversation.

EventHandlers:

• SoundEventHandler: Play a sound.
• UserNotificationEventHandler: Show a user notification.
• BezelEventHandler: Show a display bezel (like volume/brightness).
• BacklightFlashEventHandler: Flash the (keyboard) backlight.
• VibrationEventHandler: Vibrate the device.
• LEDEventHandler: Flash the LED (not available).
• ScriptEventHandler: Run a script.
• BounceDockEventHandler: Bounce the app's dock icon.
• SpeakEventHandler: Speak the event using TTS.

Maybe a SoundCenter class in Parrot that listens to all send/recv message notifications and plays sounds/notes?