blob: 7a4580a1bdbc97e271044bce6a47c306f473ad1b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
<?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;
use OCP\IDBConnection;
use OCP\IEmojiHelper;
class EmojiHelper implements IEmojiHelper {
private IDBConnection $db;
public function __construct(IDBConnection $db) {
$this->db = $db;
}
public function doesPlatformSupportEmoji(): bool {
return $this->db->supports4ByteText() &&
\class_exists(\IntlBreakIterator::class);
}
public function isValidSingleEmoji(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;
}
}
|
