Faster desktop notifications (#2955)

* timeout to close desktop notification after 5 seconds

* added option to set duration in seconds for desktop notifications. implemented setTimeout to close notification after that duration.

* removed accidentally added trailing space

* modified desktop notification settings to accept 0 as value meaning do not set a timeout

packages/rocketchat-lib/i18n/en.i18n.json

@@ -246,6 +246,7 @@
   "Desktop_Notification_Test" : "Desktop Notification Test",
   "Desktop_Notifications" : "Desktop Notifications",
   "Desktop_Notifications_Disabled" : "Desktop Notifications are Disabled. Change your browser preferences if you need Notifications enabled.",
+  "Desktop_Notifications_Duration_Description" : "Seconds to display desktop notification. This may affect OS X Notification Center. Enter 0 to use default browser settings and not affect OS X Notification Center.",
   "Desktop_Notifications_Enabled" : "Desktop Notifications are Enabled",
   "Direct_message_someone" : "Direct message someone",
   "Direct_Messages" : "Direct Messages",

packages/rocketchat-lib/server/startup/settings.coffee

@@ -100,6 +100,9 @@ RocketChat.settings.addGroup 'General', ->
 	@section 'Reporting', ->
 		@add 'Statistics_reporting', false, { type: 'boolean' }
 
+	@section 'Notifications', ->
+		@add 'Desktop_Notifications_Duration', 0, { type: 'int', public: true, i18nDescription: 'Desktop_Notification_Durations_Description' }
+
 
 RocketChat.settings.addGroup 'SMTP', ->
 	@add 'SMTP_Host', '', { type: 'string', env: true }

packages/rocketchat-ui/lib/notification.coffee

@@ -19,6 +19,10 @@
 					body: _.stripTags(message.msg)
 					silent: true
 
+				notificationDuration = RocketChat.settings.get('Desktop_Notifications_Duration') * 1000
+				if notificationDuration > 0
+					setTimeout ( -> n.close() ), notificationDuration
+
 				if notification.payload?.rid?
 					n.onclick = ->
 						window.focus()