diff lib/ur/top.ur @ 699:4e260887d8f2

Chat demo
author Adam Chlipala <adamc@hcoop.net>
date Sun, 05 Apr 2009 11:48:55 -0400
parents 9a2c18dab11d
children 5c099b1308ae
line wrap: on
line diff
--- a/lib/ur/top.ur	Sun Apr 05 11:24:55 2009 -0400
+++ b/lib/ur/top.ur	Sun Apr 05 11:48:55 2009 -0400
@@ -196,29 +196,3 @@
     case e2 of
         None => (SQL {e1} IS NULL)
       | Some _ => sql_binary sql_eq e1 (sql_inject e2)
-
-
-functor Broadcast(M : sig type t end) = struct
-    sequence s
-    table t : {Id : int, Client : client, Channel : channel M.t}
-
-    type topic = int
-
-    val inj : sql_injectable topic = _
-
-    val create = nextval s
-
-    fun subscribe id =
-        cli <- self;
-        ro <- oneOrNoRows (SELECT t.Channel FROM t WHERE t.Id = {[id]} AND t.Client = {[cli]});
-        case ro of
-            None =>
-            ch <- channel;
-            dml (INSERT INTO t (Id, Client, Channel) VALUES ({[id]}, {[cli]}, {[ch]}));
-            return ch
-          | Some r => return r.T.Channel
-
-    fun send id msg =
-        queryI (SELECT t.Channel FROM t WHERE t.Id = {[id]})
-        (fn r => Basis.send r.T.Channel msg)
-end