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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright (c) 2020, Georg Ehrke |
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* |
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* @author Georg Ehrke <[email protected]> |
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* |
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* @license AGPL-3.0 |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OCA\UserStatus\Service; |
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use OCP\IDBConnection; |
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/** |
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* Class EmojiService |
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* |
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* @package OCA\UserStatus\Service |
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*/ |
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class EmojiService { |
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/** @var IDBConnection */ |
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private $db; |
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/** |
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* EmojiService constructor. |
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* |
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* @param IDBConnection $db |
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*/ |
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public function __construct(IDBConnection $db) { |
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$this->db = $db; |
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} |
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/** |
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* @return bool |
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*/ |
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public function doesPlatformSupportEmoji(): bool { |
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return $this->db->supports4ByteText() && |
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\class_exists(\IntlBreakIterator::class); |
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} |
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/** |
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* @param string $emoji |
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* @return bool |
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*/ |
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public function isValidEmoji(string $emoji): bool { |
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$intlBreakIterator = \IntlBreakIterator::createCharacterInstance(); |
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$intlBreakIterator->setText($emoji); |
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$characterCount = 0; |
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while ($intlBreakIterator->next() !== \IntlBreakIterator::DONE) { |
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$characterCount++; |
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} |
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if ($characterCount !== 1) { |
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return false; |
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} |
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$codePointIterator = \IntlBreakIterator::createCodePointInstance(); |
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$codePointIterator->setText($emoji); |
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foreach ($codePointIterator->getPartsIterator() as $codePoint) { |
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$codePointType = \IntlChar::charType($codePoint); |
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// If the current code-point is an emoji or a modifier (like a skin-tone) |
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// just continue and check the next character |
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if ($codePointType === \IntlChar::CHAR_CATEGORY_MODIFIER_SYMBOL || |
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$codePointType === \IntlChar::CHAR_CATEGORY_MODIFIER_LETTER || |
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$codePointType === \IntlChar::CHAR_CATEGORY_OTHER_SYMBOL) { |
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continue; |
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} |
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// If it's neither a modifier nor an emoji, we only allow |
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// a zero-width-joiner or a variation selector 16 |
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$codePointValue = \IntlChar::ord($codePoint); |
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if ($codePointValue === 8205 || $codePointValue === 65039) { |
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continue; |
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} |
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return false; |
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} |
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return true; |
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} |
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} |
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nextcloud /
server
This check compares calls to functions or methods with their respective definitions. If the call has less arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.