Lots of stuff

client/app/js/collections/battles/battle_collection.coffee

@@ -0,0 +1,8 @@
+class @BattleCollection extends Backbone.Collection
+  model: Battle
+
+  isPlaying: ->
+    @find((battle) -> battle.isPlaying())?
+
+  playingBattles: ->
+    @filter((battle) -> battle.isPlaying())

client/app/js/collections/chats/private_messages.coffee

@@ -0,0 +1,2 @@
+class @PrivateMessages extends Backbone.Collection
+  model: PrivateMessage

client/app/js/collections/chats/rooms.coffee

@@ -0,0 +1,9 @@
+class @Rooms extends Backbone.Collection
+  model: Room
+
+  # Delegate room events to every single room in this collection.
+  for eventName in Room::EVENTS
+    do (eventName) =>
+      this::[eventName] = (args...) ->
+        @each (room) ->
+          room[eventName].apply(room, args)

client/app/js/collections/chats/user_list.coffee

@@ -0,0 +1,15 @@
+class @UserList extends Backbone.Collection
+  model: User
+
+  comparator: (a, b) =>
+    aAuthority = a.get('authority')
+    bAuthority = b.get('authority')
+    aName = "#{a.id}".toLowerCase()
+    bName = "#{b.id}".toLowerCase()
+    if aAuthority < bAuthority      then  1
+    else if aAuthority > bAuthority then -1
+    else if aName < bName           then -1
+    else if aName > bName           then  1
+    else                                  0
+
+  initialize: =>

client/app/js/collections/replays/replays.coffee

@@ -0,0 +1,2 @@
+class @Replays extends Backbone.Collection
+  model: Replay