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| 1 | <?php |
| 2 | namespace Apie\CommonValueObjects; |
| 3 | |
| 4 | use Apie\CommonValueObjects\Bridge\Symfony\AllowedCssInSpanSanitizer; |
| 5 | use Apie\CommonValueObjects\Bridge\Symfony\YoutubeNoCookieSanitizer; |
| 6 | use Apie\Core\Attributes\CmsSingleInput; |
| 7 | use Apie\Core\Attributes\Description; |
| 8 | use Apie\Core\Attributes\FakeMethod; |
| 9 | use Apie\Core\Attributes\ProvideIndex; |
| 10 | use Apie\Core\ValueObjects\Exceptions\InvalidStringForValueObjectException; |
| 11 | use Apie\Core\ValueObjects\Interfaces\LengthConstraintStringValueObjectInterface; |
| 12 | use Apie\Core\ValueObjects\Interfaces\StringValueObjectInterface; |
| 13 | use Apie\Core\ValueObjects\IsStringValueObject; |
| 14 | use Apie\CountWords\WordCounter; |
| 15 | use Faker\Generator; |
| 16 | use ReflectionClass; |
| 17 | use Symfony\Component\HtmlSanitizer\HtmlSanitizer; |
| 18 | use Symfony\Component\HtmlSanitizer\HtmlSanitizerConfig; |
| 19 | |
| 20 | #[FakeMethod('createRandom')] |
| 21 | #[ProvideIndex('provideIndexes')] |
| 22 | #[CmsSingleInput(['html'])] |
| 23 | #[Description('a html input that removes unsafe HTML.')] |
| 24 | final class SafeHtml implements StringValueObjectInterface, LengthConstraintStringValueObjectInterface |
| 25 | { |
| 26 | use IsStringValueObject; |
| 27 | |
| 28 | private static HtmlSanitizer $htmlSanitizer; |
| 29 | |
| 30 | private static function getHtmlSanitizer(): HtmlSanitizer |
| 31 | { |
| 32 | if (!isset(self::$htmlSanitizer)) { |
| 33 | $config = (new HtmlSanitizerConfig()) |
| 34 | ->allowSafeElements() |
| 35 | ->allowElement('b') |
| 36 | ->allowElement('i') |
| 37 | ->dropAttribute('id', []) |
| 38 | ->forceAttribute('a', 'rel', 'noopener noreferrer') |
| 39 | ->forceAttribute('a', 'target', '_blank') |
| 40 | ->allowLinkSchemes(['https', 'http', 'mailto']) |
| 41 | ->allowRelativeLinks(false) |
| 42 | ->withMaxInputLength(1024 * 1024 * 21) // character limit is 20mb, but could be truncated |
| 43 | ->dropElement('html') |
| 44 | ->dropElement('head') |
| 45 | ->dropElement('script') |
| 46 | ->dropElement('style') |
| 47 | ->allowAttribute('style', 'span') |
| 48 | ->withAttributeSanitizer(new YoutubeNoCookieSanitizer()) |
| 49 | ->allowElement('iframe', ['src', 'referrerpolicy', 'width', 'title', 'height', 'frameborder', 'allowfullscreen', 'allow']) |
| 50 | ->withAttributeSanitizer(new AllowedCssInSpanSanitizer()); |
| 51 | self::$htmlSanitizer = new HtmlSanitizer( |
| 52 | $config |
| 53 | ); |
| 54 | } |
| 55 | |
| 56 | return self::$htmlSanitizer; |
| 57 | } |
| 58 | |
| 59 | public static function createRandom(Generator $factory): self |
| 60 | { |
| 61 | $randomHtmls = ['div', 'h1', 'h2', 'h3', 'p']; |
| 62 | $string = '<div>'; |
| 63 | $counter = $factory->numberBetween(1, 3); |
| 64 | for ($i = 0; $i < $counter; $i++) { |
| 65 | $tag = $factory->randomElement($randomHtmls); |
| 66 | $string .= '<' . $tag . '>' . $factory->text(50) . '</' . $tag . '>'; |
| 67 | } |
| 68 | $string .= '</div>'; |
| 69 | return new self($string); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * @return array<string, int> |
| 74 | */ |
| 75 | public function provideIndexes(): array |
| 76 | { |
| 77 | return WordCounter::countFromString(strip_tags(str_replace('<', ' <', $this->internal))); |
| 78 | } |
| 79 | |
| 80 | public static function validate(string $input): void |
| 81 | { |
| 82 | if (strlen($input) > (1024 * 1024 * 20)) { |
| 83 | throw new InvalidStringForValueObjectException($input, new ReflectionClass(__CLASS__)); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | protected function convert(string $input): string |
| 88 | { |
| 89 | return str_replace( |
| 90 | ' ', |
| 91 | ' ', |
| 92 | self::getHtmlSanitizer()->sanitizeFor('body', $input) |
| 93 | ); |
| 94 | } |
| 95 | |
| 96 | public static function minStringLength(): int |
| 97 | { |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | public static function maxStringLength(): int |
| 102 | { |
| 103 | return 1024 * 1024 * 20; |
| 104 | } |
| 105 | } |