Revamped chat handling a bit:

- the ChatProvider is now a proper singleton rather than providing static
methods for everything (it is accessed through CrowdServer.chatprov)
- it can now be extended to create a custom UserMessage for tells (which can
contain avatar information on systems that want to show an avatar on the
receipt of a tell)
- the ChatProvider API was tidied up a bit as some methods had been addded over
time that were not sufficiently general purpose so their callers will be
changed to use the general purpose APIs.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4251 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/crowd/server/CrowdServer.java

@@ -46,6 +46,9 @@ public class CrowdServer extends PresentsServer
     /** The place registry. */
     public static PlaceRegistry plreg;
 
+    /** Our chat provider. */
+    public static ChatProvider chatprov;
+
     /**
      * Initializes all of the server services and prepares for operation.
      */
@@ -78,7 +81,8 @@ public class CrowdServer extends PresentsServer
         BodyProvider.init(invmgr);
 
         // initialize the chat services
-        ChatProvider.init(invmgr, omgr);
+        chatprov = createChatProvider();
+        chatprov.init(invmgr, omgr);
     }
 
     /**
@@ -90,6 +94,15 @@ public class CrowdServer extends PresentsServer
         return new PlaceRegistry(invmgr, omgr);
     }
 
+    /**
+     * Creates the {@link ChatProvider} we'll use to handle chat (or a
+     * derivation).
+     */
+    protected ChatProvider createChatProvider ()
+    {
+        return new ChatProvider();
+    }
+
     /**
      * Allow derived instances to create a custom {@link BodyLocator}. If the
      * system opts not to use {@link BodyObject#username} as a user's visible