closes #2700 allowGroupCreation setting

src/controllers/groups.js

@@ -2,6 +2,7 @@
 
 var async = require('async'),
 	nconf = require('nconf'),
+	meta = require('../meta'),
 	groups = require('../groups'),
 	user = require('../user'),
 	helpers = require('./helpers'),
@@ -17,7 +18,8 @@ groupsController.list = function(req, res, next) {
 			return next(err);
 		}
 		res.render('groups/list', {
-			groups: groups
+			groups: groups,
+			allowGroupCreation: parseInt(meta.config.allowGroupCreation, 10) === 1
 		});
 	});
 };

src/socket.io/groups.js

@@ -116,12 +116,15 @@ SocketGroups.update = function(socket, data, callback) {
 };
 
 SocketGroups.create = function(socket, data, callback) {
-	if(!data) {
+	if (!data) {
 		return callback(new Error('[[error:invalid-data]]'));
 	} else if (socket.uid === 0) {
 		return callback(new Error('[[error:no-privileges]]'));
+	} else if (parseInt(meta.config.allowGroupCreation, 10) !== 1) {
+		return callback(new Error('[[error:group-creation-disabled]]'));
 	}
 
+
 	data.ownerUid = socket.uid;
 	groups.create(data, callback);
 };

src/views/admin/settings/group.tpl

@@ -15,6 +15,15 @@
 					</p>
 				</label>
 			</div>
+
+			<div class="checkbox">
+				<label>
+					<input type="checkbox" data-field="allowGroupCreation"> <strong>Allow Group Creation</strong>
+					<p class="help-block">
+						If enabled, users can create groups <em>(Default: disabled)</em>
+					</p>
+				</label>
+			</div>
 		</form>
 	</div>
 </div>