Merge pull request #31703 from nextcloud/techdebt/noid/emojihelper-interface

Emojihelper interface

15 files changed, 91 insertions, 186 deletions

diff --git a/apps/user_status/composer/composer/autoload_classmap.php b/apps/user_status/composer/composer/autoload_classmap.php
index 64da04fb8ba..9988231d76e 100644
--- a/apps/user_status/composer/composer/autoload_classmap.php
+++ b/apps/user_status/composer/composer/autoload_classmap.php
@@ -31,7 +31,6 @@ return array(
     'OCA\\UserStatus\\Migration\\Version0002Date20200902144824' => $baseDir . '/../lib/Migration/Version0002Date20200902144824.php',
     'OCA\\UserStatus\\Migration\\Version1000Date20201111130204' => $baseDir . '/../lib/Migration/Version1000Date20201111130204.php',
     'OCA\\UserStatus\\Migration\\Version2301Date20210809144824' => $baseDir . '/../lib/Migration/Version2301Date20210809144824.php',
-    'OCA\\UserStatus\\Service\\EmojiService' => $baseDir . '/../lib/Service/EmojiService.php',
     'OCA\\UserStatus\\Service\\JSDataService' => $baseDir . '/../lib/Service/JSDataService.php',
     'OCA\\UserStatus\\Service\\PredefinedStatusService' => $baseDir . '/../lib/Service/PredefinedStatusService.php',
     'OCA\\UserStatus\\Service\\StatusService' => $baseDir . '/../lib/Service/StatusService.php',
diff --git a/apps/user_status/composer/composer/autoload_static.php b/apps/user_status/composer/composer/autoload_static.php
index c4ee7d031b5..1ad125615ea 100644
--- a/apps/user_status/composer/composer/autoload_static.php
+++ b/apps/user_status/composer/composer/autoload_static.php
@@ -46,7 +46,6 @@ class ComposerStaticInitUserStatus
         'OCA\\UserStatus\\Migration\\Version0002Date20200902144824' => __DIR__ . '/..' . '/../lib/Migration/Version0002Date20200902144824.php',
         'OCA\\UserStatus\\Migration\\Version1000Date20201111130204' => __DIR__ . '/..' . '/../lib/Migration/Version1000Date20201111130204.php',
         'OCA\\UserStatus\\Migration\\Version2301Date20210809144824' => __DIR__ . '/..' . '/../lib/Migration/Version2301Date20210809144824.php',
-        'OCA\\UserStatus\\Service\\EmojiService' => __DIR__ . '/..' . '/../lib/Service/EmojiService.php',
         'OCA\\UserStatus\\Service\\JSDataService' => __DIR__ . '/..' . '/../lib/Service/JSDataService.php',
         'OCA\\UserStatus\\Service\\PredefinedStatusService' => __DIR__ . '/..' . '/../lib/Service/PredefinedStatusService.php',
         'OCA\\UserStatus\\Service\\StatusService' => __DIR__ . '/..' . '/../lib/Service/StatusService.php',
diff --git a/apps/user_status/lib/Capabilities.php b/apps/user_status/lib/Capabilities.php
index f5b35896a56..8f26525286c 100644
--- a/apps/user_status/lib/Capabilities.php
+++ b/apps/user_status/lib/Capabilities.php
@@ -25,8 +25,8 @@ declare(strict_types=1);
  */
 namespace OCA\UserStatus;
 
-use OCA\UserStatus\Service\EmojiService;
 use OCP\Capabilities\ICapability;
+use OCP\IEmojiHelper;
 
 /**
  * Class Capabilities
@@ -34,17 +34,10 @@ use OCP\Capabilities\ICapability;
  * @package OCA\UserStatus
  */
 class Capabilities implements ICapability {
+	private IEmojiHelper $emojiHelper;
 
-	/** @var EmojiService */
-	private $emojiService;
-
-	/**
-	 * Capabilities constructor.
-	 *
-	 * @param EmojiService $emojiService
-	 */
-	public function __construct(EmojiService $emojiService) {
-		$this->emojiService = $emojiService;
+	public function __construct(IEmojiHelper $emojiHelper) {
+		$this->emojiHelper = $emojiHelper;
 	}
 
 	/**
@@ -54,7 +47,7 @@ class Capabilities implements ICapability {
 		return [
 			'user_status' => [
 				'enabled' => true,
-				'supports_emoji' => $this->emojiService->doesPlatformSupportEmoji(),
+				'supports_emoji' => $this->emojiHelper->doesPlatformSupportEmoji(),
 			],
 		];
 	}
diff --git a/apps/user_status/lib/Service/StatusService.php b/apps/user_status/lib/Service/StatusService.php
index 5dd70e4ea5e..e038570fc00 100644
--- a/apps/user_status/lib/Service/StatusService.php
+++ b/apps/user_status/lib/Service/StatusService.php
@@ -37,6 +37,7 @@ use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\DB\Exception;
 use OCP\IConfig;
+use OCP\IEmojiHelper;
 use OCP\IUser;
 use OCP\UserStatus\IUserStatus;
 
@@ -56,8 +57,7 @@ class StatusService {
 	/** @var PredefinedStatusService */
 	private $predefinedStatusService;
 
-	/** @var EmojiService */
-	private $emojiService;
+	private IEmojiHelper $emojiHelper;
 
 	/** @var bool */
 	private $shareeEnumeration;
@@ -95,24 +95,15 @@ class StatusService {
 	/** @var int */
 	public const MAXIMUM_MESSAGE_LENGTH = 80;
 
-	/**
-	 * StatusService constructor.
-	 *
-	 * @param UserStatusMapper $mapper
-	 * @param ITimeFactory $timeFactory
-	 * @param PredefinedStatusService $defaultStatusService
-	 * @param EmojiService $emojiService
-	 * @param IConfig $config
-	 */
 	public function __construct(UserStatusMapper $mapper,
 								ITimeFactory $timeFactory,
 								PredefinedStatusService $defaultStatusService,
-								EmojiService $emojiService,
+								IEmojiHelper $emojiHelper,
 								IConfig $config) {
 		$this->mapper = $mapper;
 		$this->timeFactory = $timeFactory;
 		$this->predefinedStatusService = $defaultStatusService;
-		$this->emojiService = $emojiService;
+		$this->emojiHelper = $emojiHelper;
 		$this->shareeEnumeration = $config->getAppValue('core', 'shareapi_allow_share_dialog_user_enumeration', 'yes') === 'yes';
 		$this->shareeEnumerationInGroupOnly = $this->shareeEnumeration && $config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_group', 'no') === 'yes';
 		$this->shareeEnumerationPhone = $this->shareeEnumeration && $config->getAppValue('core', 'shareapi_restrict_user_enumeration_to_phone', 'no') === 'yes';
@@ -334,7 +325,7 @@ class StatusService {
 		}
 
 		// Check if statusIcon contains only one character
-		if ($statusIcon !== null && !$this->emojiService->isValidEmoji($statusIcon)) {
+		if ($statusIcon !== null && !$this->emojiHelper->isValidSingleEmoji($statusIcon)) {
 			throw new InvalidStatusIconException('Status-Icon is longer than one character');
 		}
 		// Check for maximum length of custom message
diff --git a/apps/user_status/tests/Unit/CapabilitiesTest.php b/apps/user_status/tests/Unit/CapabilitiesTest.php
index af36900d3bc..02874fcbf6d 100644
--- a/apps/user_status/tests/Unit/CapabilitiesTest.php
+++ b/apps/user_status/tests/Unit/CapabilitiesTest.php
@@ -26,13 +26,13 @@ declare(strict_types=1);
 namespace OCA\UserStatus\Tests;
 
 use OCA\UserStatus\Capabilities;
-use OCA\UserStatus\Service\EmojiService;
+use OCP\IEmojiHelper;
 use Test\TestCase;
 
 class CapabilitiesTest extends TestCase {
 
-	/** @var EmojiService|\PHPUnit\Framework\MockObject\MockObject */
-	private $emojiService;
+	/** @var IEmojiHelper|\PHPUnit\Framework\MockObject\MockObject */
+	private $emojiHelper;
 
 	/** @var Capabilities */
 	private $capabilities;
@@ -40,8 +40,8 @@ class CapabilitiesTest extends TestCase {
 	protected function setUp(): void {
 		parent::setUp();
 
-		$this->emojiService = $this->createMock(EmojiService::class);
-		$this->capabilities = new Capabilities($this->emojiService);
+		$this->emojiHelper = $this->createMock(IEmojiHelper::class);
+		$this->capabilities = new Capabilities($this->emojiHelper);
 	}
 
 	/**
@@ -50,7 +50,7 @@ class CapabilitiesTest extends TestCase {
 	 * @dataProvider getCapabilitiesDataProvider
 	 */
 	public function testGetCapabilities(bool $supportsEmojis): void {
-		$this->emojiService->expects($this->once())
+		$this->emojiHelper->expects($this->once())
 			->method('doesPlatformSupportEmoji')
 			->willReturn($supportsEmojis);
 
diff --git a/apps/user_status/tests/Unit/Service/StatusServiceTest.php b/apps/user_status/tests/Unit/Service/StatusServiceTest.php
index 3dd397e1d36..df31cf0d5ad 100644
--- a/apps/user_status/tests/Unit/Service/StatusServiceTest.php
+++ b/apps/user_status/tests/Unit/Service/StatusServiceTest.php
@@ -35,13 +35,13 @@ use OCA\UserStatus\Exception\InvalidMessageIdException;
 use OCA\UserStatus\Exception\InvalidStatusIconException;
 use OCA\UserStatus\Exception\InvalidStatusTypeException;
 use OCA\UserStatus\Exception\StatusMessageTooLongException;
-use OCA\UserStatus\Service\EmojiService;
 use OCA\UserStatus\Service\PredefinedStatusService;
 use OCA\UserStatus\Service\StatusService;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\DB\Exception;
 use OCP\IConfig;
+use OCP\IEmojiHelper;
 use OCP\UserStatus\IUserStatus;
 use Test\TestCase;
 
@@ -56,8 +56,8 @@ class StatusServiceTest extends TestCase {
 	/** @var PredefinedStatusService|\PHPUnit\Framework\MockObject\MockObject */
 	private $predefinedStatusService;
 
-	/** @var EmojiService|\PHPUnit\Framework\MockObject\MockObject */
-	private $emojiService;
+	/** @var IEmojiHelper|\PHPUnit\Framework\MockObject\MockObject */
+	private $emojiHelper;
 
 	/** @var IConfig|\PHPUnit\Framework\MockObject\MockObject */
 	private $config;
@@ -71,7 +71,7 @@ class StatusServiceTest extends TestCase {
 		$this->mapper = $this->createMock(UserStatusMapper::class);
 		$this->timeFactory = $this->createMock(ITimeFactory::class);
 		$this->predefinedStatusService = $this->createMock(PredefinedStatusService::class);
-		$this->emojiService = $this->createMock(EmojiService::class);
+		$this->emojiHelper = $this->createMock(IEmojiHelper::class);
 
 		$this->config = $this->createMock(IConfig::class);
 
@@ -84,7 +84,7 @@ class StatusServiceTest extends TestCase {
 		$this->service = new StatusService($this->mapper,
 			$this->timeFactory,
 			$this->predefinedStatusService,
-			$this->emojiService,
+			$this->emojiHelper,
 			$this->config);
 	}
 
@@ -138,7 +138,7 @@ class StatusServiceTest extends TestCase {
 		$this->service = new StatusService($this->mapper,
 			$this->timeFactory,
 			$this->predefinedStatusService,
-			$this->emojiService,
+			$this->emojiHelper,
 			$this->config);
 
 		$this->assertEquals([], $this->service->findAllRecentStatusChanges(20, 50));
@@ -155,7 +155,7 @@ class StatusServiceTest extends TestCase {
 		$this->service = new StatusService($this->mapper,
 			$this->timeFactory,
 			$this->predefinedStatusService,
-			$this->emojiService,
+			$this->emojiHelper,
 			$this->config);
 
 		$this->assertEquals([], $this->service->findAllRecentStatusChanges(20, 50));
@@ -519,7 +519,7 @@ class StatusServiceTest extends TestCase {
 				->willThrowException(new DoesNotExistException(''));
 		}
 
-		$this->emojiService->method('isValidEmoji')
+		$this->emojiHelper->method('isValidSingleEmoji')
 			->with($statusIcon)
 			->willReturn($supportsEmoji);
 
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index f96641b17c8..2f056457cfd 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -411,6 +411,7 @@ return array(
     'OCP\\IDBConnection' => $baseDir . '/lib/public/IDBConnection.php',
     'OCP\\IDateTimeFormatter' => $baseDir . '/lib/public/IDateTimeFormatter.php',
     'OCP\\IDateTimeZone' => $baseDir . '/lib/public/IDateTimeZone.php',
+    'OCP\\IEmojiHelper' => $baseDir . '/lib/public/IEmojiHelper.php',
     'OCP\\IEventSource' => $baseDir . '/lib/public/IEventSource.php',
     'OCP\\IGroup' => $baseDir . '/lib/public/IGroup.php',
     'OCP\\IGroupManager' => $baseDir . '/lib/public/IGroupManager.php',
@@ -821,7 +822,6 @@ return array(
     'OC\\Command\\FileAccess' => $baseDir . '/lib/private/Command/FileAccess.php',
     'OC\\Command\\QueueBus' => $baseDir . '/lib/private/Command/QueueBus.php',
     'OC\\Comments\\Comment' => $baseDir . '/lib/private/Comments/Comment.php',
-    'OC\\Comments\\EmojiHelper' => $baseDir . '/lib/private/Comments/EmojiHelper.php',
     'OC\\Comments\\Manager' => $baseDir . '/lib/private/Comments/Manager.php',
     'OC\\Comments\\ManagerFactory' => $baseDir . '/lib/private/Comments/ManagerFactory.php',
     'OC\\Config' => $baseDir . '/lib/private/Config.php',
@@ -1088,6 +1088,7 @@ return array(
     'OC\\Diagnostics\\QueryLogger' => $baseDir . '/lib/private/Diagnostics/QueryLogger.php',
     'OC\\DirectEditing\\Manager' => $baseDir . '/lib/private/DirectEditing/Manager.php',
     'OC\\DirectEditing\\Token' => $baseDir . '/lib/private/DirectEditing/Token.php',
+    'OC\\EmojiHelper' => $baseDir . '/lib/private/EmojiHelper.php',
     'OC\\Encryption\\DecryptAll' => $baseDir . '/lib/private/Encryption/DecryptAll.php',
     'OC\\Encryption\\EncryptionWrapper' => $baseDir . '/lib/private/Encryption/EncryptionWrapper.php',
     'OC\\Encryption\\Exceptions\\DecryptionFailedException' => $baseDir . '/lib/private/Encryption/Exceptions/DecryptionFailedException.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 0661fd4f77c..95668560261 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -440,6 +440,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\IDBConnection' => __DIR__ . '/../../..' . '/lib/public/IDBConnection.php',
         'OCP\\IDateTimeFormatter' => __DIR__ . '/../../..' . '/lib/public/IDateTimeFormatter.php',
         'OCP\\IDateTimeZone' => __DIR__ . '/../../..' . '/lib/public/IDateTimeZone.php',
+        'OCP\\IEmojiHelper' => __DIR__ . '/../../..' . '/lib/public/IEmojiHelper.php',
         'OCP\\IEventSource' => __DIR__ . '/../../..' . '/lib/public/IEventSource.php',
         'OCP\\IGroup' => __DIR__ . '/../../..' . '/lib/public/IGroup.php',
         'OCP\\IGroupManager' => __DIR__ . '/../../..' . '/lib/public/IGroupManager.php',
@@ -850,7 +851,6 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\Command\\FileAccess' => __DIR__ . '/../../..' . '/lib/private/Command/FileAccess.php',
         'OC\\Command\\QueueBus' => __DIR__ . '/../../..' . '/lib/private/Command/QueueBus.php',
         'OC\\Comments\\Comment' => __DIR__ . '/../../..' . '/lib/private/Comments/Comment.php',
-        'OC\\Comments\\EmojiHelper' => __DIR__ . '/../../..' . '/lib/private/Comments/EmojiHelper.php',
         'OC\\Comments\\Manager' => __DIR__ . '/../../..' . '/lib/private/Comments/Manager.php',
         'OC\\Comments\\ManagerFactory' => __DIR__ . '/../../..' . '/lib/private/Comments/ManagerFactory.php',
         'OC\\Config' => __DIR__ . '/../../..' . '/lib/private/Config.php',
@@ -1117,6 +1117,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\Diagnostics\\QueryLogger' => __DIR__ . '/../../..' . '/lib/private/Diagnostics/QueryLogger.php',
         'OC\\DirectEditing\\Manager' => __DIR__ . '/../../..' . '/lib/private/DirectEditing/Manager.php',
         'OC\\DirectEditing\\Token' => __DIR__ . '/../../..' . '/lib/private/DirectEditing/Token.php',
+        'OC\\EmojiHelper' => __DIR__ . '/../../..' . '/lib/private/EmojiHelper.php',
         'OC\\Encryption\\DecryptAll' => __DIR__ . '/../../..' . '/lib/private/Encryption/DecryptAll.php',
         'OC\\Encryption\\EncryptionWrapper' => __DIR__ . '/../../..' . '/lib/private/Encryption/EncryptionWrapper.php',
         'OC\\Encryption\\Exceptions\\DecryptionFailedException' => __DIR__ . '/../../..' . '/lib/private/Encryption/Exceptions/DecryptionFailedException.php',
diff --git a/lib/private/Comments/EmojiHelper.php b/lib/private/Comments/EmojiHelper.php
deleted file mode 100644
index a75919edbc9..00000000000
--- a/lib/private/Comments/EmojiHelper.php
+++ /dev/null
@@ -1,101 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-/**
- * @copyright Copyright (c) 2020, Georg Ehrke
- *
- * @author Georg Ehrke <oc.list@georgehrke.com>
- * @author Joas Schilling <coding@schilljs.com>
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-namespace OC\Comments;
-
-use OCP\IDBConnection;
-
-/**
- * Copied OCA\UserStatus\Service\EmojiService
- * Needs to be unified later
- */
-class EmojiHelper {
-
-	/** @var IDBConnection */
-	private $db;
-
-	/**
-	 * EmojiService constructor.
-	 *
-	 * @param IDBConnection $db
-	 */
-	public function __construct(IDBConnection $db) {
-		$this->db = $db;
-	}
-
-	/**
-	 * @return bool
-	 */
-	public function doesPlatformSupportEmoji(): bool {
-		return $this->db->supports4ByteText() &&
-			\class_exists(\IntlBreakIterator::class);
-	}
-
-	/**
-	 * @param string $emoji
-	 * @return bool
-	 */
-	public function isValidEmoji(string $emoji): bool {
-		$intlBreakIterator = \IntlBreakIterator::createCharacterInstance();
-		$intlBreakIterator->setText($emoji);
-
-		$characterCount = 0;
-		while ($intlBreakIterator->next() !== \IntlBreakIterator::DONE) {
-			$characterCount++;
-		}
-
-		if ($characterCount !== 1) {
-			return false;
-		}
-
-		$codePointIterator = \IntlBreakIterator::createCodePointInstance();
-		$codePointIterator->setText($emoji);
-
-		foreach ($codePointIterator->getPartsIterator() as $codePoint) {
-			$codePointType = \IntlChar::charType($codePoint);
-
-			// If the current code-point is an emoji or a modifier (like a skin-tone)
-			// just continue and check the next character
-			if ($codePointType === \IntlChar::CHAR_CATEGORY_MODIFIER_SYMBOL ||
-				$codePointType === \IntlChar::CHAR_CATEGORY_MODIFIER_LETTER ||
-				$codePointType === \IntlChar::CHAR_CATEGORY_OTHER_SYMBOL ||
-				$codePointType === \IntlChar::CHAR_CATEGORY_GENERAL_OTHER_TYPES) {
-				continue;
-			}
-
-			// If it's neither a modifier nor an emoji, we only allow
-			// a zero-width-joiner or a variation selector 16
-			$codePointValue = \IntlChar::ord($codePoint);
-			if ($codePointValue === 8205 || $codePointValue === 65039) {
-				continue;
-			}
-
-			return false;
-		}
-
-		return true;
-	}
-}
diff --git a/lib/private/Comments/Manager.php b/lib/private/Comments/Manager.php
index abbe4c66c95..3275658d555 100644
--- a/lib/private/Comments/Manager.php
+++ b/lib/private/Comments/Manager.php
@@ -39,6 +39,7 @@ use OCP\Comments\NotFoundException;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IConfig;
 use OCP\IDBConnection;
+use OCP\IEmojiHelper;
 use OCP\IUser;
 use OCP\IInitialStateService;
 use OCP\PreConditionNotMetException;
@@ -59,7 +60,7 @@ class Manager implements ICommentsManager {
 	/** @var ITimeFactory */
 	protected $timeFactory;
 
-	/** @var EmojiHelper */
+	/** @var IEmojiHelper */
 	protected $emojiHelper;
 
 	/** @var IInitialStateService */
@@ -81,7 +82,7 @@ class Manager implements ICommentsManager {
 								LoggerInterface $logger,
 								IConfig $config,
 								ITimeFactory $timeFactory,
-								EmojiHelper $emojiHelper,
+								IEmojiHelper $emojiHelper,
 								IInitialStateService $initialStateService) {
 		$this->dbConn = $dbConn;
 		$this->logger = $logger;
@@ -153,7 +154,7 @@ class Manager implements ICommentsManager {
 			throw new \UnexpectedValueException('Actor, Object and Verb information must be provided for saving');
 		}
 
-		if ($comment->getVerb() === 'reaction' && !$this->emojiHelper->isValidEmoji($comment->getMessage())) {
+		if ($comment->getVerb() === 'reaction' && !$this->emojiHelper->isValidSingleEmoji($comment->getMessage())) {
 			// 4 characters: laptop + person + gender + skin color => "🧑🏽‍💻" is a single emoji from the picker
 			throw new \UnexpectedValueException('Reactions can only be a single emoji');
 		}
@@ -1074,7 +1075,7 @@ class Manager implements ICommentsManager {
 	 * @since 24.0.0
 	 */
 	public function supportReactions(): bool {
-		return $this->dbConn->supports4ByteText();
+		return $this->emojiHelper->doesPlatformSupportEmoji();
 	}
 
 	/**
diff --git a/apps/user_status/lib/Service/EmojiService.php b/lib/private/EmojiHelper.php
index 0f197933872..7a4580a1bdb 100644
--- a/apps/user_status/lib/Service/EmojiService.php
+++ b/lib/private/EmojiHelper.php
@@ -24,42 +24,24 @@ declare(strict_types=1);
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  *
  */
-namespace OCA\UserStatus\Service;
+namespace OC;
 
 use OCP\IDBConnection;
+use OCP\IEmojiHelper;
 
-/**
- * Class EmojiService
- *
- * @package OCA\UserStatus\Service
- */
-class EmojiService {
-
-	/** @var IDBConnection */
-	private $db;
+class EmojiHelper implements IEmojiHelper {
+	private IDBConnection $db;
 
-	/**
-	 * EmojiService constructor.
-	 *
-	 * @param IDBConnection $db
-	 */
 	public function __construct(IDBConnection $db) {
 		$this->db = $db;
 	}
 
-	/**
-	 * @return bool
-	 */
 	public function doesPlatformSupportEmoji(): bool {
 		return $this->db->supports4ByteText() &&
 			\class_exists(\IntlBreakIterator::class);
 	}
 
-	/**
-	 * @param string $emoji
-	 * @return bool
-	 */
-	public function isValidEmoji(string $emoji): bool {
+	public function isValidSingleEmoji(string $emoji): bool {
 		$intlBreakIterator = \IntlBreakIterator::createCharacterInstance();
 		$intlBreakIterator->setText($emoji);
 
diff --git a/lib/private/Server.php b/lib/private/Server.php
index e9d673d3746..5308de21f51 100644
--- a/lib/private/Server.php
+++ b/lib/private/Server.php
@@ -1431,6 +1431,8 @@ class Server extends ServerContainer implements IServerContainer {
 
 		$this->registerAlias(IInitialStateService::class, InitialStateService::class);
 
+		$this->registerAlias(\OCP\IEmojiHelper::class, \OC\EmojiHelper::class);
+
 		$this->registerAlias(\OCP\UserStatus\IManager::class, \OC\UserStatus\Manager::class);
 
 		$this->registerAlias(IBroker::class, Broker::class);
diff --git a/lib/public/IEmojiHelper.php b/lib/public/IEmojiHelper.php
new file mode 100644
index 00000000000..229b08ec68b
--- /dev/null
+++ b/lib/public/IEmojiHelper.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP;
+
+/**
+ * @since 24.0.0
+ */
+interface IEmojiHelper {
+	/**
+	 * @since 24.0.0
+	 */
+	public function doesPlatformSupportEmoji(): bool;
+
+	/**
+	 * @since 24.0.0
+	 */
+	public function isValidSingleEmoji(string $emoji): bool;
+}
diff --git a/tests/lib/Comments/ManagerTest.php b/tests/lib/Comments/ManagerTest.php
index 961f8dfdd41..6bcd0dec8ed 100644
--- a/tests/lib/Comments/ManagerTest.php
+++ b/tests/lib/Comments/ManagerTest.php
@@ -3,8 +3,8 @@
 namespace Test\Comments;
 
 use OC\Comments\Comment;
-use OC\Comments\EmojiHelper;
 use OC\Comments\Manager;
+use OC\EmojiHelper;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\Comments\IComment;
 use OCP\Comments\ICommentsEventHandler;
diff --git a/apps/user_status/tests/Unit/Service/EmojiServiceTest.php b/tests/lib/EmojiHelperTest.php
index 454f1d75a0d..cdcbf358481 100644
--- a/apps/user_status/tests/Unit/Service/EmojiServiceTest.php
+++ b/tests/lib/EmojiHelperTest.php
@@ -1,7 +1,6 @@
 <?php
 
 declare(strict_types=1);
-
 /**
  * @copyright Copyright (c) 2020, Georg Ehrke
  *
@@ -23,25 +22,24 @@ declare(strict_types=1);
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  *
  */
-namespace OCA\UserStatus\Tests\Service;
+namespace Test;
 
-use OCA\UserStatus\Service\EmojiService;
+use OC\EmojiHelper;
 use OCP\IDBConnection;
-use Test\TestCase;
+use OCP\IEmojiHelper;
 
-class EmojiServiceTest extends TestCase {
+class EmojiHelperTest extends TestCase {
 
 	/** @var IDBConnection|\PHPUnit\Framework\MockObject\MockObject */
 	private $db;
 
-	/** @var EmojiService */
-	private $service;
+	private IEmojiHelper $helper;
 
 	protected function setUp(): void {
 		parent::setUp();
 
 		$this->db = $this->createMock(IDBConnection::class);
-		$this->service = new EmojiService($this->db);
+		$this->helper = new EmojiHelper($this->db);
 	}
 
 	/**
@@ -55,7 +53,7 @@ class EmojiServiceTest extends TestCase {
 			->method('supports4ByteText')
 			->willReturn($supports4ByteText);
 
-		$this->assertEquals($expected, $this->service->doesPlatformSupportEmoji());
+		$this->assertEquals($expected, $this->helper->doesPlatformSupportEmoji());
 	}
 
 	/**
@@ -72,15 +70,15 @@ class EmojiServiceTest extends TestCase {
 	 * @param string $emoji
 	 * @param bool $expected
 	 *
-	 * @dataProvider isValidEmojiDataProvider
+	 * @dataProvider isValidSingleEmojiDataProvider
 	 */
-	public function testIsValidEmoji(string $emoji, bool $expected): void {
-		$actual = $this->service->isValidEmoji($emoji);
+	public function testIsValidSingleEmoji(string $emoji, bool $expected): void {
+		$actual = $this->helper->isValidSingleEmoji($emoji);
 
 		$this->assertEquals($expected, $actual);
 	}
 
-	public function isValidEmojiDataProvider(): array {
+	public function isValidSingleEmojiDataProvider(): array {
 		return [
 			['🏝', true],
 			['📱', true],