In the process of adding the delete button to the invitation panel. Apparently, the delete method doesn't work with the invitation items, so I might need to add some extra logic.

public/src/admin/manage/registration.js

@@ -22,6 +22,24 @@ define('admin/manage/registration', function() {
 			});
 			return false;
 		});
+
+		$('.invites-list').on('click', '[data-action]', function(ev) {
+			var $this = this;
+			var parent = $(this).parents('[data-invitation-mail]');
+			var email = parent.attr('data-invitation-mail');
+			var action = $(this).attr('data-action');
+			var method = 'admin.user.deleteInvitation';
+
+			if (action === 'delete') {
+				socket.emit(method, {email: email}, function(err) {
+					if (err) {
+						return app.alertError(err.message);
+					}
+					parent.remove();
+				});
+			}
+			return false;
+		});
 	};
 
 	return Registration;

src/socket.io/admin/user.js

@@ -212,6 +212,10 @@ User.search = function(socket, data, callback) {
 	});
 };
 
+User.deleteInvitation = function(socket, data, callback) {
+	user.deleteInvitation(data.email, callback);
+};
+
 User.acceptRegistration = function(socket, data, callback) {
 	user.acceptRegistration(data.username, callback);
 };
@@ -221,4 +225,4 @@ User.rejectRegistration = function(socket, data, callback) {
 };
 
 
-module.exports = User;
+module.exports = User;

src/user/invite.js

@@ -122,6 +122,7 @@ module.exports = function(User) {
 
 	User.deleteInvitation = function(email, callback) {
 		callback = callback || function() {};
+		console.log('invitation:email:' + email);
 		db.delete('invitation:email:' + email, callback);
 	};
 

src/views/admin/manage/registration.tpl

@@ -66,18 +66,23 @@
 		<br><br>
 		The username will be displayed to the right of the emails for users who have redeemed their invitations.
 	</p>
-	<table class="table table-striped users-list">
+	<table class="table table-striped invites-list">
 		<tr>
 			<th>Inviter Username</th>
 			<th>Invitee Email</th>
 			<th>Invitee Username (if registered)</th>
 		</tr>
 		<!-- BEGIN invites -->
-		<tr>
-			<!-- BEGIN invites.invitations -->
+		<!-- BEGIN invites.invitations -->
+		<tr data-invitation-mail="{invites.invitations.email}">
+			<!-- TODO: Upon deletion, this will result in an incorrect visual state until page is reloaded -->
 			<td><!-- IF @first -->{invites.username}<!-- ENDIF @first --></td>
 			<td>{invites.invitations.email}</td>
-			<td>{invites.invitations.username}</td>
+			<td>{invites.invitations.username}
+				<div class="btn-group pull-right">
+					<button class="btn btn-danger btn-xs" data-action="delete"><i class="fa fa-times"></i></button>
+				</div>
+			</td>
 		</tr>
 		<!-- END invites.invitations -->
 		<!-- END invites -->