snipe
48 lines
1.3 KiB
PHP
48 lines
1.3 KiB
PHP
<?php
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namespace App\Rules;
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use Closure;
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use Illuminate\Contracts\Validation\ValidationRule;
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use Illuminate\Translation\PotentiallyTranslatedString;
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class CssColor implements ValidationRule
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{
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private static function pattern(): string
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{
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$num = '\s*[\d.]+\s*';
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$pct = '\s*[\d.]+%\s*';
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$alpha = '(?:,\s*[\d.]+\s*)?';
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$hex = '#[0-9a-fA-F]{3,8}';
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$rgb = "rgba?\({$num},{$num},{$num}{$alpha}\)";
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$hsl = "hsla?\({$num},{$pct},{$pct}{$alpha}\)";
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return "/^(?:{$hex}|{$rgb}|{$hsl})$/i";
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}
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/**
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* Return $value if it is a safe CSS color, otherwise return $default.
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* Use this for defense-in-depth when rendering color values already in the database.
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*/
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public static function sanitize(?string $value, string $default): string
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{
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if ($value && preg_match(self::pattern(), trim($value))) {
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return $value;
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}
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return $default;
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}
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/**
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* Run the validation rule.
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*
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* @param Closure(string, ?string=): PotentiallyTranslatedString $fail
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*/
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public function validate(string $attribute, mixed $value, Closure $fail): void
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{
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if (! preg_match(self::pattern(), $value)) {
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$fail(trans('validation.valid_css_color'));
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}
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}
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}
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