Validation for max allowed number of chars in custom groups name

js/GroupsView.js

@@ -113,7 +113,7 @@
 
 						// status 422 in case of validation error
 						if (response.status === 422) {
-							OC.Notification.showTemporary(t('customgroups', 'The group name can not be empty or start with space. The group name should at least have 2 characters. Or kindly check if a group with this name already exists'));
+							OC.Notification.showTemporary(t('customgroups', 'The group name can not be empty or start with space. The group name should at least have 2 characters or maximum 64 characters. Or kindly check if a group with this name already exists'));
 							return;
 						} else {
 							OC.Notification.showTemporary(t('customgroups', 'Could not rename group'));
@@ -269,7 +269,7 @@
 						return;
 					}
 					if (response.status === 422) {
-						OC.Notification.showTemporary(t('customgroups', "The group name can not be empty or start with space. The group name should at least have 2 characters"));
+						OC.Notification.showTemporary(t('customgroups', "The group name can not be empty or start with space. The group name should at least have 2 characters or maximum 64 characters"));
 					}
 					if (response.status === 403) {
 						OC.Notification.showTemporary(t('customgroups', 'Could not create group'));

lib/Dav/GroupMembershipCollection.php

@@ -309,6 +309,11 @@ public function updateDisplayName($displayName) {
 			throw new ValidationException("The group name should be at least 2 characters long.");
 		}
 
+		/* Verify if the multibyte character length is more than 64 */
+		if (\mb_strlen($displayName, 'UTF-8') > 64) {
+			throw new ValidationException('The group name should be maximum 64 characters long.');
+		}
+
 		if ($displayName[0] === ' ') {
 			throw new ValidationException('The group name can not start with space');
 		}

lib/Dav/GroupsCollection.php

@@ -141,6 +141,11 @@ public function createExtendedCollection($name, Mkcol $mkCol) {
 			throw new ValidationException('The group name should be at least 2 characters long.');
 		}
 
+		/** Group name must be max 64 characters long */
+		if (\mb_strlen($name, 'UTF-8') > 64) {
+			throw new ValidationException('The group name should be maximum 64 characters long.');
+		}
+
 		/**
 		 * A special case where index is appended with the group name
 		 */

tests/js/GroupsViewSpec.js

@@ -374,7 +374,7 @@ describe('GroupsView test', function() {
 				expect($groupEl.find('input').length).toEqual(0);
 
 				expect(notificationStub.calledOnce).toEqual(true);
-				expect(notificationStub.calledWith('The group name can not be empty or start with space. The group name should at least have 2 characters. Or kindly check if a group with this name already exists')).toEqual(true);
+				expect(notificationStub.calledWith('The group name can not be empty or start with space. The group name should at least have 2 characters or maximum 64 characters. Or kindly check if a group with this name already exists')).toEqual(true);
 
 				notificationStub.restore();
 			});