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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace DevToolbelt\LaravelEloquentPlus\Validators; |
| 6 | |
| 7 | use Closure; |
| 8 | use Illuminate\Contracts\Validation\ValidationRule; |
| 9 | |
| 10 | /** |
| 11 | * Validation rule for hexadecimal color codes. |
| 12 | * |
| 13 | * Validates both short (3 characters) and full (6 characters) hex color formats. |
| 14 | * The leading hash (#) is optional. |
| 15 | * |
| 16 | * Usage: |
| 17 | * ```php |
| 18 | * $rules = [ |
| 19 | * 'background_color' => ['required', new HexColor()], |
| 20 | * 'text_color' => ['nullable', new HexColor()], |
| 21 | * ]; |
| 22 | * ``` |
| 23 | * |
| 24 | * Valid formats: |
| 25 | * - "#FFF" or "FFF" (short format) |
| 26 | * - "#FFFFFF" or "FFFFFF" (full format) |
| 27 | * - Case insensitive: "#fff", "#AbC123" |
| 28 | * |
| 29 | * Invalid formats: |
| 30 | * - "#FFFFF" (5 characters) |
| 31 | * - "#GGG" (invalid hex characters) |
| 32 | * - "red" (color names not supported) |
| 33 | * |
| 34 | * @package DevToolbelt\LaravelEloquentPlus\Validators |
| 35 | */ |
| 36 | final class HexColor implements ValidationRule |
| 37 | { |
| 38 | /** |
| 39 | * Regular expression pattern for valid hex color codes. |
| 40 | * |
| 41 | * Matches: #FFF, FFF, #FFFFFF, FFFFFF (case insensitive) |
| 42 | */ |
| 43 | private const string PATTERN = '/^#?([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/'; |
| 44 | |
| 45 | /** |
| 46 | * Run the validation rule. |
| 47 | * |
| 48 | * @param string $attribute The attribute name being validated |
| 49 | * @param mixed $value The value to validate |
| 50 | * @param Closure(string, string|null=): \Illuminate\Translation\PotentiallyTranslatedString $fail |
| 51 | * @return void |
| 52 | */ |
| 53 | public function validate(string $attribute, mixed $value, Closure $fail): void |
| 54 | { |
| 55 | if ($value === null || $value === '') { |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | if (!is_string($value)) { |
| 60 | $fail('The :attribute must be a valid hexadecimal color.'); |
| 61 | return; |
| 62 | } |
| 63 | |
| 64 | if (!preg_match(self::PATTERN, $value)) { |
| 65 | $fail('The :attribute must be a valid hexadecimal color (e.g., #FFF or #FFFFFF).'); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Determine if the validation rule passes. |
| 71 | * |
| 72 | * This method can be used for simple boolean validation checks, |
| 73 | * useful for Validator::extend() registration. |
| 74 | * |
| 75 | * @param mixed $value The value to validate |
| 76 | * @return bool True if valid, false otherwise |
| 77 | */ |
| 78 | public function passes(mixed $value): bool |
| 79 | { |
| 80 | if ($value === null || $value === '') { |
| 81 | return true; |
| 82 | } |
| 83 | |
| 84 | if (!is_string($value)) { |
| 85 | return false; |
| 86 | } |
| 87 | |
| 88 | return (bool) preg_match(self::PATTERN, $value); |
| 89 | } |
| 90 | } |