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/acceptance/features/apiCustomGroups/customGroups.feature

@@ -258,3 +258,27 @@ Feature: Custom Groups
     And user "user0" has created a custom group called "group0"
     When user "user0" makes user "non-existing-user" a member of custom group "group0" using the API
     Then the HTTP status code should be "412"
+
+  Scenario Outline: user tries to create a custom group with name having more than 64 characters or less than 2 characters
+    Given user "user0" has been created with default attributes and without skeleton files
+    When user "user0" creates a custom group called "<customGroup>" using the API
+    Then the HTTP status code should be "422"
+    And custom group "<customGroup>" should not exist
+    Examples:
+      | customGroup                                                               |
+      | thisIsAGroupNameWhoseLengthIsGreaterThanSixtyFourCharactersWhichIsInvalid |
+      | यो समूह को नाम मा धेरै शब्द हरु छन तेसैले यो समूह अवैध हुनेछ यो समूह      |
+      | a                                                                         |
+      | य                                                                         |
+
+  Scenario Outline: user tries to create a custom group with some valid names
+    Given user "user0" has been created with default attributes and without skeleton files
+    When user "user0" creates a custom group called "<customGroup>" using the API
+    Then the HTTP status code should be "201"
+    And custom group "<customGroup>" should exist
+    Examples:
+      | customGroup  |
+      | thisIsAGroup |
+      | समूह         |
+      | ab           |
+      | hello-&#$%   |

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();
 			});

tests/unit/Dav/GroupMembershipCollectionTest.php

@@ -717,15 +717,16 @@ public function providesUpdateDisplayNameValidateException() {
 			['a'],
 			[' a'],
 			['á'],
-			[' áé']
+			[' áé'],
+			['12345678911234567892123456789312345678941234567895123456789612345']
 		];
 	}
 
 	/**
 	 * @dataProvider providesUpdateDisplayNameValidateException
 	 * @param string $groupName
 	 */
-	public function testUpdateDisplayNameValidatException($groupName) {
+	public function testUpdateDisplayNameValidateException($groupName) {
 		$this->expectException(\OCA\CustomGroups\Exception\ValidationException::class);
 
 		$this->node->updateDisplayName($groupName);

tests/unit/Dav/GroupsCollectionTest.php

@@ -282,7 +282,8 @@ public function providesTestCreateException() {
 			[' abc', 'starts with space'],
 			['a', 'only one char'],
 			['á', 'one char multibyte'],
-			['.', 'single dot']
+			['.', 'single dot'],
+			['12345678911234567892123456789312345678941234567895123456789612345', 'name longer than 64 characters']
 		];
 	}