102 lines
2.5 KiB
PHP
102 lines
2.5 KiB
PHP
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
/**
|
|
* @copyright Copyright (c) 2020, Georg Ehrke
|
|
*
|
|
* @author Georg Ehrke <oc.list@georgehrke.com>
|
|
*
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* 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, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
namespace OCA\UserStatus\Service;
|
|
|
|
use OCP\IDBConnection;
|
|
|
|
/**
|
|
* Class EmojiService
|
|
*
|
|
* @package OCA\UserStatus\Service
|
|
*/
|
|
class EmojiService {
|
|
|
|
/** @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;
|
|
}
|
|
}
|