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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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* @author Joas Schilling <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program 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 as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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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 |
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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 OC; |
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use OCP\IDBConnection; |
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use OCP\IEmojiHelper; |
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class EmojiHelper implements IEmojiHelper { |
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private IDBConnection $db; |
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public function __construct(IDBConnection $db) { |
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$this->db = $db; |
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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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public function isValidSingleEmoji(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($codePoint); |
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// Unicode chars need 2 or more chars |
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// The characterCount before this loop already validate if is a single emoji |
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// This condition is to don't continue if non emoji chars |
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if (strlen($emoji) >= 2) { |
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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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$codePointType === \IntlChar::CHAR_CATEGORY_OTHER_SYMBOL || |
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$codePointType === \IntlChar::CHAR_CATEGORY_FORMAT_CHAR || // i.e. 🏴 🏴 |
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$codePointType === \IntlChar::CHAR_CATEGORY_OTHER_PUNCTUATION || // i.e. ‼️ ⁉️ #⃣ |
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$codePointType === \IntlChar::CHAR_CATEGORY_LOWERCASE_LETTER || // i.e. ℹ️ |
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$codePointType === \IntlChar::CHAR_CATEGORY_MATH_SYMBOL || // i.e. ↔️ ◻️ ⤴️ ⤵️ |
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$codePointType === \IntlChar::CHAR_CATEGORY_ENCLOSING_MARK || // i.e. 0⃣..9⃣ |
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$codePointType === \IntlChar::CHAR_CATEGORY_DECIMAL_DIGIT_NUMBER || // i.e. 0⃣..9⃣ |
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$codePointType === \IntlChar::CHAR_CATEGORY_DASH_PUNCTUATION || // i.e. 〰️ |
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$codePointType === \IntlChar::CHAR_CATEGORY_GENERAL_OTHER_TYPES |
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) { |
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continue; |
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} |
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} |
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// If it's neither a modifier nor an emoji, we only allow |
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// a zero-width-joiner or a variation selector 16 |
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$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
