about to be able to create user

nodejs/sockets/index.js

@@ -79,7 +79,7 @@ module.exports = function(sql) {
                 });
     });
     
-    socket.on("user", function(name) {
+    socket.on("user", function(name, fn) {
       console.log("-> signal: user("+name+")");
       var result = {name: name, exists: false, pubkey: null};
       sql.query("select pubkey from user where name = ?", [name], function(err, res, flds) {
@@ -87,10 +87,23 @@ module.exports = function(sql) {
           result.exists = true;
           result.pubkey = res[0].pubkey;
         }
-        emit('user', result);
+        fn(result);
       });
     });
     
+    socket.on("lookup", function(name, fn) {
+      console.log("-> signal: lookup("+name+")")
+      var result = false
+      sql.query("select pubkey from user where name = ?",
+                [name],
+                function(err, res, flds) {
+                  if (!err && res && res.length) {
+                    result = true;
+                  }
+                  fn(result)
+                });
+    });
+    
     socket.on("users", function(name) {
       console.log("-> signal: users");
       sql.query("select name, pubkey from user", [name], function(err, res, flds) {