Use event.once instead of event.on for one-time events.

standup-irc.js

@@ -155,10 +155,10 @@ var commands = {
                 project = project.slice(1);
             }
             var ret = api.status.create(user, project, args.slice(1).join(' '));
-            ret.on('ok', function(data) {
+            ret.once('ok', function(data) {
                 client.say(channel, 'Ok, submitted status #' + data.id);
             });
-            ret.on('error', function(err, data) {
+            ret.once('error', function(err, data) {
                 client.say(channel, 'Uh oh, something went wrong.');
             });
         });
@@ -168,10 +168,10 @@ var commands = {
     'delete': function(user, channel, message, args) {
         utils.ifAuthorized(user, channel, function() {
             var ret = api.status.delete_(args[0], user);
-            ret.on('ok', function(data) {
+            ret.once('ok', function(data) {
                 client.say(channel, 'Ok, status #' + args + ' is no more!');
             });
-            ret.on('error', function(code, data) {
+            ret.once('error', function(code, data) {
                 if (code === 403) {
                     client.say(channel, "You don't have permissiont to do that. " +
                                         "Do you own that status?");
@@ -198,10 +198,10 @@ var commands = {
     /* Check a user's authorization status. */
     'trust': function(user, channel, message, args) {
         var a = authman.checkUser(args);
-        a.on('authorized', function() {
+        a.once('authorized', function() {
             client.say(channel, 'I trust ' + args);
         });
-        a.on('unauthorized', function() {
+        a.once('unauthorized', function() {
             client.say(channel, "I don't trust " + args);
         });
     },

utils.js

@@ -30,7 +30,7 @@ function request(path, method, data, emitter) {
             resp_data += chunk;
         });
         // When we have received the entire response
-        res.on('end', function() {
+        res.once('end', function() {
             if (res.statusCode === 200) {
                 var json = JSON.parse(resp_data);
                 emitter.emit('ok', json);
@@ -42,7 +42,7 @@ function request(path, method, data, emitter) {
         });
     });
     req.end(body);
-    req.on('error', function(e) {
+    req.once('error', function(e) {
         logger.error(options.host + ':' + options.port + options.path +
                      ': ' + JSON.stringify(data));
         emitter.emit('error', String(e));
@@ -55,8 +55,8 @@ this.request = request;
 
 this.ifAuthorized = function(user, channel, func) {
     var a = authman.checkUser(user);
-    a.on('authorized', func);
-    a.on('unauthorized', function() {
+    a.once('authorized', func);
+    a.once('unauthorized', function() {
         client.say(channel, "I don't trust you, " + user + ", " +
                             "are you identified with nickserv?");
     });