Don't save data from pusher that won't likely be used

If user is logged in and doesn't keep 'recent repositories' tab opened, most of
the pusher events from 'common' channel are useless.

This commit introduces a logic to reject pusher events if:

  * recent tab hasn't been opened
  * user is signed in
  * Travis CI for open source is used
  * repository for a given event is not yet in store
  * repository for a given event is not part of current user's repositories

app/routes/main/recent.coffee

@@ -4,4 +4,7 @@
 Route = MainTabRoute.extend
   reposTabName: 'recent'
 
+  activate: ->
+    @store.set('recentReposOpened', true)
+
 `export default Route`

app/store.coffee

@@ -1,4 +1,5 @@
 `import DS from 'ember-data'`
+`import config from 'travis/config/environment'`
 
 Store = DS.Store.extend
   defaultAdapter: 'application'
@@ -7,6 +8,22 @@ Store = DS.Store.extend
   receivePusherEvent: (event, data) ->
     [name, type] = event.split(':')
 
+    auth = @container.lookup('auth:main')
+    if !@get('recentReposOpened') && event != 'job:log' && auth.get('signedIn') &&
+        !config.pro && !config.enterprise
+      # if recent repos hasn't been opened yet, we can safely
+      # drop any events that doesn't belong to repos owned by
+      # the logged in user and that aren't related to any
+      # repositories that are already opened
+
+      permissions = auth.get('permissions')
+      if name == 'job'
+        id = data.job.repository_id
+      else if name == 'build'
+        id = data.repository.id
+
+      return if !@hasRecordForId('repo', id) && !permissions.contains(id)
+
     if name == 'job' && data.job?.commit
       @pushPayload(commits: [data.job.commit])
 

app/utils/auth.coffee

@@ -144,4 +144,6 @@ Auth = Ember.Object.extend
     "#{location.protocol}//www.gravatar.com/avatar/#{@get('currentUser.gravatarId')}?s=48&d=mm"
   ).property('currentUser.gravatarId')
 
+  permissions: Ember.computed.alias('currentUser.permissions')
+
 `export default Auth`