FIX: respect anon_polling_interval

FIX: only poll background message bus pages once a minute
FEATURE: background_polling_interval
FEATURE: long polling pushed back to 25 seconds
FEATURE: force a poll when a bg page returns to foreground

also improve copy of message bus settings a bit

Gemfile.lock

@@ -163,7 +163,7 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     memory_profiler (0.0.4)
-    message_bus (0.9.6)
+    message_bus (1.0.0)
       eventmachine
       rack (>= 1.1.3)
       redis

app/assets/javascripts/discourse/initializers/subscribe-user-notifications.js.es6

@@ -10,8 +10,11 @@ export default {
     var site = container.lookup('site:main'),
         siteSettings = container.lookup('site-settings:main');
 
-    if (user) {
     var bus = Discourse.MessageBus;
+    bus.callbackInterval = siteSettings.anon_polling_interval;
+    bus.backgroundCallbackInterval = siteSettings.background_polling_interval;
+
+    if (user) {
       bus.callbackInterval = siteSettings.polling_interval;
       bus.enableLongPolling = true;
       bus.baseUrl = Discourse.getURL("/");

config/locales/server.en.yml

@@ -698,9 +698,10 @@ en:
     enable_private_messages: "Allow trust level 1 users to create private messages and reply to private messages"
 
     enable_long_polling: "Message bus used for notification can use long polling"
-    long_polling_interval: "Interval before a new long poll is issued in milliseconds "
+    long_polling_interval: "Amount of time the server should wait before responding to clients when there is no data to send (logged on users only)"
-    polling_interval: "How often should logged in user clients poll in milliseconds"
+    polling_interval: "When not long polling, how often should logged on clients poll in milliseconds"
     anon_polling_interval: "How often should anonymous clients poll in milliseconds"
+    background_polling_interval: "How often should the clients poll in milliseconds (when the window is in the background)"
 
     auto_track_topics_after: "Global default milliseconds before a topic is automatically tracked, users can override (0 for always, -1 for never)"
     new_topic_duration_minutes: "Global default number of minutes a topic is considered new, users can override (-1 for always, -2 for last visit)"

config/site_settings.yml

@@ -615,13 +615,16 @@ developer:
   enable_long_polling:
     client: true
     default: true
-  long_polling_interval: 15000
+  long_polling_interval: 25000
+  background_polling_interval:
+    client: true
+    default: 60000
   polling_interval:
     client: true
     default: 3000
   anon_polling_interval:
     client: true
-    default: 30000
+    default: 15000
   flush_timings_secs:
     client: true
     default: 5